LF to 4 GHz

High Linearity Y-Mixer

Preliminary Technical Data

ADL5350

Rev. PrC

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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

FEATURES

Broadband RF, IF, and LO ports
Conversion loss: 6 dB
Noise figure: 6 dB
High input IP3: 26 dBm
High input P

1dB

: 17 dBm

Low LO drive level
Single-ended design: no need for baluns
Single-supply operation: 3 V @ 10 mA
Miniature 8-lead 3 mm x 2 mm LFCSP package
RoHS compliant

APPLICATIONS

Cellular base station
Point-to-point radio links
RF instrumentation

FUNCTIONAL BLOCK DIAGRAM

0
1

INPUT OR

OUTPUT

OUTPUT OR

INPUT

GND

INPUT

VPOS

ADL5350

Figure 1.

GENERAL DESCRIPTION

The ADL5350 is a high linearity, up-and-down converting mixer
capable of operating over a broad input frequency range. It is well
suited for demanding cellular base-station mixer designs that
require high sensitivity and efficient blocker immunity. Based
on a GaAs pHEMT single-ended mixer architecture, the ADL5350
provides excellent input linearity and low noise figure without
the need for a high power level, local oscillator (LO) drive.

In 850 MHz/900 MHz receive applications, the ADL5350
provides a typical conversion loss of only 6 dB. The integrated
LO amplifier allows a low LO drive level, typically only 4 dBm
for most applications. The input IP3 is typically greater than
25 dBm, with an input compression point of 17 dBm. The high
input linearity of the ADL5350 makes the device an excellent
mixer for communications systems that require high blocker
immunity, such as GSM 850/900 and 800 MHz CDMA2000. At
2 GHz, a slightly greater supply current is required to obtain
similar performance.

For low frequency applications, the ADL5350 provides access to
the gate contact of the output-mixing device. This allows an
external LO coupling capacitor to be applied between the
VPOS pin and GC pin, helping to improve the LO drive to the
switching device. Using a single 100 pF capacitor allows high
performance at the lower LO frequencies.

The single-ended broadband RF/IF port allows the device to be
customized for a desired band of operation using simple
external filter networks. The LO to RF isolation is based on the
LO rejection of the RF port filter network. Greater isolation
may be achieved using higher order filter networks as described
in the Applications section of this data sheet.

The ADL5350 is fabricated on a GaAs pHEMT high
performance IC process. The ADL5350 is available in a
3 mm × 2 mm 8-lead LFCSP package. It operates over a
-40°C to +85°C temperature range. An evaluation board is also
available.

ADL5350

Preliminary Technical Data

Rev. PrC | Page 2 of 24

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Specifications..................................................................................... 3

820 MHz Receive Performance .................................................. 3

1950 MHz Receive Performance ................................................ 3

Spur Tables......................................................................................... 4

450 MHz Spur Table..................................................................... 4

820 MHz Spur Table..................................................................... 4

1950 MHz Spur Table................................................................... 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ..............................................8

820 MHz Characteristics..............................................................8

1950 MHz Characteristics......................................................... 13

Functional Description.................................................................. 18

Circuit Description .................................................................... 18

Implementation Procedure ....................................................... 18

Applications..................................................................................... 20

Low Frequency Applications .................................................... 20

70 MHz Receive Performance .................................................. 21

High Frequency Applications ................................................... 22

Evaluation Board ............................................................................ 23

Outline Dimensions ....................................................................... 24

Ordering Guide .......................................................................... 24

Preliminary Technical Data

ADL5350

PrC | Page 3 of 24

SPECIFICATIONS

820 MHz RECEIVE PERFORMANCE

= 3 V, T

= 25°C, LO power = 4 dBm, re: 50 , unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Conditions

RF Frequency Range

750

850

975

MHz

LO Frequency Range

500

780

945

MHz

Low Side LO

IF Frequency Range

250

MHz

Conversion Loss

6.3

= 820 MHz, f

= 750 MHz, f

= 70 MHz

SSB Noise Figure

5.6

= 820 MHz, f

= 750 MHz, f

= 70 MHz

Input Third-Order Intercept

27.6

dBm

RF1

= 819 MHz, f

RF2

= 821 MHz, f

= 750 MHz

= 70 MHz, each RF tone 0 dBm

Input 1 dB Compression Point

17.8

dBm

= 820 MHz, f

= 750 MHz, f

= 70 MHz

LO to IF Leakage

-28

dBc

LO Power = 4 dBm, f

= 820 MHz, f

= 750 MHz

LO to RF Leakage

-16

dBc

LO Power = 4 dBm, f

= 820 MHz, f

= 750 MHz

RF to IF Leakage

-17

dBc

RF Power = 0 dBm, f

= 820 MHz, f

= 750 MHz

IF/2 Spurious

-50

dBc

RF Power = 0 dBm, f

= 820 MHz, f

= 750 MHz

Supply Voltage

2.7

5.5

Supply Current

LO Power = 4 dBm

1950 MHz RECEIVE PERFORMANCE

= 3 V, T

= 25°C, LO power = 6 dBm, re: 50 , unless otherwise noted.

Table 2.

Parameter

Min

Typ

Max

Unit

Conditions

RF Frequency Range

1800

1950

2050

MHz

LO Frequency Range

1420

1760

2000

MHz

Low Side LO

IF Frequency Range

190

380

MHz

Conversion

Loss

7.2

= 1950 MHz, f

= 1760 MHz, f

=190 MHz

SSB Noise Figure

6.8

= 1950 MHz, f

= 1760 MHz, f

=190 MHz

Input Third-Order Intercept

26.6

dBm

RF1

= 1949 MHz, f

RF2

= 1951 MHz, f

= 1760 MHz

= 190 MHz, each RF tone 0 dBm

Input 1 dB Compression Point

dBm

= 1950 MHz, f

= 1760 MHz, f

=190 MHz

LO to IF Leakage

-12.5

dBc

LO Power = 6 dBm, f

= 1950 MHz, f

= 1760 MHz

LO to RF Leakage

-10.5

dBc

LO Power = 6 dBm, f

= 1950 MHz, f

= 1760 MHz

RF to IF Leakage

-10

dBc

RF Power = 0 dBm, f

= 1950 MHz, f

= 1760 MHz

IF/2 Spurious

-54

dBc

RF Power = 0 dBm, f

= 1950 MHz, f

= 1760 MHz

Supply

Voltage

2.7 3 5.5 V

Supply Current

LO Power = 6 dBm

ADL5350

Preliminary Technical Data

PrC | Page 4 of 24

SPUR TABLES

All spur tables are N × f

- M × f

-mixer spurious products for 0 dBm input power, unless otherwise noted.

450 MHz SPUR TABLE

Table 3.

0 1 2 3 4 5 6 7 8 9 10

11 12

-5.7 -16.2 -25.5 -16.2 -23.9 -22.3 -27.1 -24.7 -27.1 -26.8 -38.6 -30.2 -29.9 -27.2 -29.2 -34.8

-24.9 -5.7 -30.1 -18.8 -25.2 -24.0 -24.3 -37.1 -26.5 -53.1 -32.0 -44.0 -59.3 -46.0 -52.3 -43.3

-47.4 -57.5 -51.1 -60.2 -53.8 -55.2 -52.5 -50.8 -57.7 -51.4 -65.0 -53.1 -63.9 -77.5 -68.7 -75.5

-70.5 -75.3 -70.2 -79.7 -69.5 -76.6 -66.9 -74.5 -73.0 -74.7 -75.5 -71.4 -74.6 -75.3 -75.6 -76.1

-78.4 -73.1 -82.4 -79.3 -79.5 -77.5 -84.5 -77.8 -82.2 -77.6 -88.4 -82.7 -77.9 -72.8 -77.1 -83.6

-82.7 -76.6 -77.1 -89.8 -77.6 -76.1 -79.3 -79.3 -83.1 -81.1 -78.4 -79.6 -80.2 -77.9 -85.6 -79.1

-90.6 -79.2 -82.2 -84.3 -81.2 -96.3 -75.8 -80.1 -80.7 -76.9 -82.5 -74.4 -84.0 -88.9 -89.6 -77.9

N 7 -78.9 -74.4 -77.0 -83.2 -80.1 -86.3 -78.9 -87.2 -76.5 -81.5 -82.8 -83.6 -88.7 -73.5 -78.3 -78.4

-77.3 -73.6 -79.0 -80.4 -78.6 -79.6 -83.3 -81.0 -77.4 -70.4 -77.0 -79.7 -90.7 -78.0 -76.2 -77.0

-80.8 -78.5 -76.7 -78.7 -84.8 -80.4 -81.1 -76.9 -80.7 -79.6 -76.0 -91.3 -90.5 -91.4 -96.8 -75.7

-78.9 -77.1 -77.0 -84.0 -87.0 -81.2 -84.4 -90.2 -75.8 -77.5 -90.4 -82.8 -83.0 -87.9 -81.9 -83.1

-77.5 -80.4 -78.7 -86.7 -79.1 -76.4 -85.9 -78.7 -83.4 -85.2 -78.6 -92.3 -80.3 -75.7 -78.3 -75.4

-81.3 -81.6 -81.3 -76.8 -81.5 -78.5 -78.5 -89.7 -74.4 -73.3 -77.0 -78.5 -75.2 -75.4 -91.3 -90.7

-79.9 -81.3 -77.4 -78.7 -79.7 -76.7 -77.7 -85.8 -77.0 -78.9 -84.5 -75.0 -81.0 -78.6 -75.8 -82.0

-82.7 -77.6 -79.6 -76.3 -82.3 -79.8 -79.2 -83.5 -83.5 -91.4 -78.9 -102.8 -75.6 -80.2 -79.5 -87.4

-79.7 -82.9 -79.6 -75.7 -78.8 -78.6 -78.7 -79.8 -77.7 -78.4 -78.7 -80.6 -79.0 -80.4 -87.0 -80.3

820 MHz SPUR TABLE

Table 4.

0 1 2 3 4 5 6 7 8 9 10

-6.22 -14.7 -12.8 -13.3 -14.2 -30.1 -27.1 -20.4 -20.2 -22.1 N.M.

N.M.

-18.8 -6.22 -33 -20.3 -21.4 -44.5 -38.5 -43.1 -39 -31.3 -33.1 N.M.

N.M.

-44.6 -71.6 -50 -64.8 -51.7 -53.7 -60.1 -64.3 -74.8 -61.5 -56.8 -55.1 N.M.

N.M.

-73.4 -76.8 -69.8 -72.8 -75.5 -79.6 -97.5 -72.3 -79.5 -84.4 -77.8 -74.9 -74.5 N.M.

N.M.

-78.2 -77.8 -85.8 -91.3 -80.8 -78.2 -80.9 -76.1 -80.3 -79.4 -81.1 -79.3 -78.1 -77.6 N.M.

N.M.

-82.1 -80.8 -85.2 -81.4 -87.1 -79.5 -84.7 -108 -90.2 -84.5 -76.4 -75.1 -80.9 -78.8 -83.3 N.M.

-77.6 -78.6 -80.6 -78.3 -83.2 -70.8 -77.5 -86.8 -84.9 -81.7 -76.7 -81 -79.4 -78.6 -77.1 -79.5

N 7 -80.2 -76.6 -83.1 -75.8 -82.4 -78.2 -78.7 -80.7 -83 -76.5 -88.9 -77.7 -77.3 -80.2 -78.9 -78.1

-83.5 -80.6 -81.7 -79 -84.1 -78.4 -79.5 -86.3 -79 -76.1 -86.7 -79.5 -88.8 -73.9 -79.7 -77.4

N.M.

-78.7 -76.3 -78.1 -82.6 -78.2 -78.5 -87.7 -82.1 -76.7 -94.1 -81.2 -87.5 -80.3 -81.9 -74.9

N.M.

-78.7 -78.4 -80.8 -75.4 -76.6 -86 -84 -81.2 -75.5 -72.5 -78.1 -77.1 -81.8 -78.5

N.M.

-79 -76.7 -81.5 -79.1 -78.2 -76.1 -83 -75 -77.8 -84.1 -79.1 -79.1 -84.2

N.M.

-76.4 -78.8 -77 -79.4 -81.8 -78.6 -82.8 -79.3 -76.8 -75.8 -82.2 -81.2

N.M.

-82 -77.7 -80.8 -79.8 -76.6 -79.3 -82.1 -94.9 -74.6 -83.3 -75.9

N.M.

-84.2 -78 -81.7 -80.3 -79.3 -77.7 -75.8 -86.9 -77.3 -77

N.M.

-77 -79.5 -82.2 -80.7 -75.3 -76.1 -79.7 -78.6

N.M. indicates that a frequency was not measured. N.M. spurs are either less than -100 dBm or correspond to a frequency greater than 5995 MHz.

Preliminary Technical Data

ADL5350

PrC | Page 5 of 24

1950 MHz SPUR TABLE

Table 5.

0 1 2 3 4 5 6 7 8 9 10

-7.8 -2.08 -16.6 -31.7 N.M.

N.M.

-9.6 -7.81 -36.2 -27.2 -41.1 -28 N.M.

N.M.

-54.7 -74.9 -54 -62 -58.5 -78.6 -57.2 N.M.

N.M.

-81.1 -78.6 -78.7 -85.4 -82.1 -75.6 -79.6 -79.4 N.M.

N.M.

-78 -83.8 -86.4 -84.1 -79.2 -77.5 -77.2 -81.9 N.M.

N.M.

-73.9 -82.8 -82.3 -87.8 -80.1 -74.7 -79.3 -82.1 N.M.

N.M.

-80.1 -82.1 -86.7 -83.4 -80.7 -88.2 -79.5 -86.3 N.M.

N.M.

-79 -80.6 -80 -76.5 -81.4 -81.8 -75.2 -77.4 N.M.

N.M.

-79.6 -83.2 -81.5 -81.5 -85.5 -80.9 -79.3 -79.5 N.M.

N.M.

-83.7 -89 -83.1 -79.7 -80.6 -81 -82.9 -78.7 N.M.

N.M.

-80.9 -76.4 -82.7 -79.2 -78.8 -77.9 -80.7 -79.6

N.M.

-77.8 -81.8 -79.7 -88.3 -73.9 -80.9 -79.5

N.M.

-79.6 -78.7 -77.6 -87.1 -86.6 -76.7

N.M.

-74.4 -81.6 -83 -82.9 -80.7

N.M.

-78.9 -82 -74.6 -80.4

N.M.

-78.7 -73.1 -78.1

N.M. indicates that a frequency was not measured. N.M. spurs are either less than -100 dBm or correspond to a frequency greater than 5995 MHz.

ADL5350

Preliminary Technical Data

PrC | Page 6 of 24

ABSOLUTE MAXIMUM RATINGS

Table 6.

Parameter

Rating

Supply Voltage, V

6.0 V

RF Input Level

20 dBm

LO Input Level

20 dBm

Internal Power Dissipation

324 mW

154.3 °C/W

Maximum Junction Temperature

135°C

Operating Temperature Range

-40°C to +85°C

Storage Temperature Range

-65°C to +150°C

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Preliminary Technical Data

ADL5350

PrC | Page 7 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

-
0

RF/IF

GND2

LOIN

GND1

8 RF/IF

7 GC

6 VPOS

5 GND1

ADL5350

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 7. Pin Function Descriptions

Pin No.

Mnemonic

Function

1, 8

RF/IF

RF and IF Input/Output Ports. These nodes are internally tied together. RF and IF port separation is achieved
using external tuning networks.

GND2

Device Common (DC Ground) for RFIF Switching Circuitry.

LOIN

LO Input, AC-Coupled.

4, 5

GND1

Device Common (DC Ground) for LO Buffer Circuitry.

6 VPOS Positive Supply Voltage for the Drain of the LO Buffer. A series RF choke is needed on the supply line to provide

proper ac-loading of the LO buffer amplifier.

7 GC Gate Contact of Mixing Device. Typically not connected for high frequency mixing. Connecting capacitor

between GC and VPOS permits low frequency applications.

ADL5350

Preliminary Technical Data

Rev. PrC | Page 8 of 24

TYPICAL PERFORMANCE CHARACTERISTICS

820 MHz CHARACTERISTICS

POS

= 3 V, RF Frequency = 820 MHz, IF Frequency = 70 MHz, RF Level = -10 dBm, LO Level = 4 dBm, Temperature = 25°C,

unless otherwise noted.

40

20

URRE

(
m

TEMPERATURE (°C)

Figure 3. Current vs. Temperature

40

20

VER

I
O

(
d

)

TEMPERATURE (°C)

Figure 4. Conversion Loss vs. Temperature

40

20

3

(
d

)

TEMPERATURE (°C)

Figure 5. IIP3 vs. Temperature

40

20

I
N

)

TEMPERATURE (°C)

Figure 6. Input Compression vs. Temperature

2.7

3.2

3.7

4.2

4.7

5.2

URRE

(
m

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 7. Current vs. VPOS

7.4

6.0

6.2

6.4

6.6

6.8

7.0

7.2

2.7

3.2

3.7

4.2

4.7

5.2

VER

I
O

(
d

)

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 8. Conversion Loss vs. VPOS

Preliminary Technical Data

ADL5350

PrC | Page 9 of 24

820 MHz CHARACTERISTICS

29.0

25.5

26.0

26.5

27.0

27.5

28.0

28.5

2.7

3.2

3.7

4.2

4.7

5.2

3

(
d

)

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 9. IIP3 vs. VPOS

2.7

3.2

3.7

4.2

4.7

5.2

I
N

)

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 10. Input Compression vs. VPOS

2.7

3.0

3.5

4.0

4.5

5.5

5.0

I
S

I
G

(

SUPPLY VOLTAGE (V)

Figure 11. Noise Figure vs. VPOS

750

800

850

900

950

URRE

(
m

RF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 12. Current vs. RF Frequency

750

800

850

900

950

VER

I
O

(
d

)

RF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 13. Conversion Loss vs. RF Frequency

750

800

850

900

950

3

(
d

)

RF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 14. IIP3 vs. RF Frequency

ADL5350

Preliminary Technical Data

Rev. PrC | Page 10 of 24

820 MHz CHARACTERISTICS

750

800

850

900

950

I
N

T P

1
dB

(

)

RF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 15. Input Compression vs. RF Frequency

700

750

800

850

900

950

1000

I
S

I
G

(

RF FREQUENCY (MHz)

Figure 16. Noise Figure vs. RF Frequency

130

180

230

URRE

(
m

IF FREQUENCY (MHz)

+85°C

40°C

+25°C

Figure 17. Current vs. IF Frequency

130

180

230

VER

I
O

(
d

)

IF FREQUENCY (MHz)

+85°C

40°C

+25°C

Figure 18. Conversion Loss vs. IF Frequency

130

180

230

3

(
d

)

IF FREQUENCY (MHz)

+85°C

40°C

+25°C

Figure 19. IIP3 vs. IF Frequency

150

100

200

250

I
N

)

IF FREQUENCY (MHz)

+85°C

+25°C

40°C

Figure 20. Input Compression vs. IF Frequency

Preliminary Technical Data

ADL5350

PrC | Page 11 of 24

820 MHz CHARACTERISTICS

380

350

300

250

200

150

100

I
S

I
G

(

IF FREQUENCY (MHz)

Figure 21. Noise Figure vs. IF Frequency

URRE

(
m

LO LEVEL (dBm)

Figure 22. Current vs. LO Level

7.4

7.2

7.0

6.8

6.6

6.4

6.2

6.0

VER

I
O

(
d

)

LO LEVEL (dBm)

40°C

+25°C

+85°C

Figure 23. Conversion Loss vs. LO Level

3

(
d

)

LO LEVEL (dBm)

Figure 24. IIP3 vs. LO Level

I
N

)

LO LEVEL (dBm)

Figure 25. Input Compression vs. LO Level

I
S

I
G

(

LO LEVEL (dBm)

POS

= 5V

POS

= 3V

Figure 26. Noise Figure vs. LO Level

ADL5350

Preliminary Technical Data

Rev. PrC | Page 12 of 24

820 MHz CHARACTERISTICS

10

15

20

25

30

700

750

800

850

900

950

1000

HRO

(
d

Bc)

RF FREQUENCY (MHz)

Figure 27. RF to IF Feedthrough vs. RF Frequency

10

15

20

25

40

30

35

630

680

730

780

830

880

930

HRO

H (

Bc)

LO FREQUENCY (MHz)

Figure 28. LO to IF Feedthrough vs. LO Frequency

10

12

14

20

16

18

630

680

730

780

830

880

930

AKAG

(
d

Bc)

LO FREQUENCY (MHz)

Figure 29. LO to RF Leakage vs. LO Frequency

Preliminary Technical Data

ADL5350

PrC | Page 13 of 24

1950 MHz CHARACTERISTICS

POS

= 3 V, RF Frequency = 1950 MHz, IF Frequency = 190 MHz, RF Level = -10 dBm, LO Level = 6 dBm, Temperature = 25°C,

unless otherwise noted.

40

20

URRE

(
m

TEMPERATURE (°C)

Figure 30. Current vs. Temperature

40

20

VER

I
O

(
d

)

TEMPERATURE (°C)

Figure 31. Conversion Loss vs. Temperature

40

20

3

(
d

)

TEMPERATURE (°C)

Figure 32. IIP3 vs. Temperature

40

20

I
N

T P

1
dB

(

)

TEMPERATURE (°C)

Figure 33. Input Compression vs. Temperature

2.7

3.2

3.7

4.2

4.7

5.2

URRE

(
m

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 34. Current vs. VPOS

10

12

2.7

3.2

3.7

4.2

4.7

5.2

VER

I
O

(
d

)

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 35. Conversion Loss vs. VPOS

ADL5350

Preliminary Technical Data

Rev. PrC | Page 14 of 24

1950 MHz CHARACTERISTICS

2.7

3.2

3.7

4.2

4.7

5.2

3

(
d

)

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 36. IIP3 vs. VPOS

2.7

3.2

3.7

4.2

4.7

5.2

I
N

)

SUPPLY VOLTAGE (V)

40°C

+25°C

+85°C

Figure 37. Input Compression vs. VPOS

2.7

3.0

5.5

4.5

5.0

4.0

3.5

I
S

I
G

(

SUPPLY VOLTAGE (V)

Figure 38. Noise Figure vs. VPOS

1800

1850

1900

1950

2000

2050

CURRE

(

)

RF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 39. Current vs. RF Frequency

1800

1850

1900

1950

2000

2050

40°C

+25°C

+85°C

VER

)

RF FREQUENCY (MHz)

Figure 40. Conversion Loss vs. RF Frequency

1800

1850

1900

1950

2000

2050

40°C

+25°C

+85°C

3

(
d

)

RF FREQUENCY (MHz)

Figure 41. IIP3 vs. RF Frequency

Preliminary Technical Data

ADL5350

PrC | Page 15 of 24

1950 MHz CHARACTERISTICS

1800

1850

1900

1950

2000

2050

I
N

)

RF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 42. Input Compression vs. RF Frequency

2.7

3.0

3.5

4.0

4.5

5.0

5.5

I
S

I
G

(

RF FREQUENCY (MHz)

Figure 43. Noise Figure vs. RF Frequency

100

150

200

250

300

350

CURRE

(

)

IF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 44. Current vs. IF Frequency

100

150

200

250

300

350

VER

)

IF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 45. Conversion Loss vs. IF Frequency

100

150

200

250

300

350

3

(
d

)

IF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 46. IIP3 vs. IF Frequency

100

150

200

250

300

350

I
N

)

IF FREQUENCY (MHz)

40°C

+25°C

+85°C

Figure 47. Input Compression vs. IF Frequency

ADL5350

Preliminary Technical Data

Rev. PrC | Page 16 of 24

1950 MHz CHARACTERISTICS

100

150

200

250

300

350

380

I
S

I
G

(

IF FREQUENCY (MHz)

Figure 48. Noise Figure vs. IF Frequency

RRE

(
m

LO LEVEL (dBm)

Figure 49. Current vs. LO Level

VER

I
O

(
d

)

LO LEVEL (dBm)

Figure 50. Conversion Loss vs. LO Level

3

(
d

)

LO LEVEL (dBm)

Figure 51. IIP3 vs. LO Level

I
N

)

LO LEVEL (dBm)

Figure 52. Input Compression vs. LO Level

I
S

I
G

(

LO LEVEL (dBm)

POS

= 3V

POS

= 5V

Figure 53. Noise Figure vs. LO Level

Preliminary Technical Data

ADL5350

PrC | Page 17 of 24

1950 MHz CHARACTERISTICS

10

15

20

25

1750

1800

1850

1900

1950

2000

2050

2100

2150

(
d

Bc)

RF FREQUENCY (MHz)

Figure 54. RF to IF Feedthrough vs. RF Frequency

18

16

14

12

10

1560

1610

1660

1710

1760

1810

1860

1910

1960

H (

Bc)

LO FREQUENCY (MHz)

Figure 55. LO to IF Feedthrough vs. LO Frequency

14

12

10

1560

1610

1660

1710

1760

1810

1860

1910

1960

AKAG

(
d

Bc)

LO FREQUENCY (MHz)

Figure 56. LO to RF Leakage vs. LO Frequency

ADL5350

Preliminary Technical Data

Rev. PrC | Page 18 of 24

FUNCTIONAL DESCRIPTION

CIRCUIT DESCRIPTION

The ADL5350 is a GaAs MESFET, single-ended passive mixer
with an integrated LO buffer amplifier. The device relies on the
varying drain to source channel conductance of a FET junction
to modulate an RF signal. A simplified schematic is shown in
Figure 57.

5
7

GND

INPUT

VPOS

INPUT

OR OUTPUT

OUTPUT

OR INPUT

Figure 57. Simplified Schematic

The LO signal is applied to the gate contact of a FET-based buffer
amplifier. The buffer amplifier provides sufficient gain of the LO
signal to drive the resistive switch. Additionally, feedback
circuitry provides the necessary bias to the FET buffer amplifier
and RF/IF ports to achieve optimum modulation efficiency for
common cellular frequencies. The GC node is the "gate-contact"
of the RF/IF port resistive switch. The GC node enables external
control of the bias level of the switching FET, allowing the user to
override the internal bias generation circuitry, and allow further
optimization of the mixer's dynamic performance at frequencies
outside of the 800 MHz to 2000 MHz band.

The mixing of RF and LO signals is achieved by switching the
channel conductance from the RF/IF port to ground at the rate
of the LO. The RF signal is passed through an external band-
pass network to help reject image bands and reduce the
broadband noise presented to the mixer. The band-limited RF
signal is presented to the time-varying load of the RF/IF port,
which causes the envelope of the RF signal to be amplitude
modulated at the rate of the LO. A filter network applied to the
IF port is necessary to reject the RF signal and pass the wanted
mixing product. In a down-conversion application, the IF filter
network is designed to pass the difference frequency and
present an open circuit to the incident RF frequency. Similarly,
for an up-conversion application, the filter is designed to pass
the sum frequency and reject the incident RF. As a result, the
frequency response of the mixer is determined by the response
characteristics of the external RF/IF filter networks.

IMPLEMENTATION PROCEDURE

The ADL5350 is a simple single-ended mixer that relies on off-
chip circuitry to achieve effective RF dynamic performance.
The following steps should be followed to achieve optimum
performance (see Figure 58 for component designations):

RF/IF

GND2

LOIN

GND1

RF/IF

VPOS

GND1

ADL5350

Figure 58. Reference Schematic

Tune LO buffer supply inductor for lowest supply current.

To start this procedure, it is necessary to provide an initial
guess. Table 8 can be used as a starting point. It is not necessary
to terminate or populate the RF and IF port networks to
complete this first step. The RFIF pins can be left open while
tuning the LO buffer networks.

Table 8. Recommended LO Bias Inductor

Desired LO Frequency

Recommended LO Bias Inductor (L4)

380 MHz

68 nH

750 MHz

24 nH

1000 MHz

18 nH

1750 MHz

3.8 nH

2000 MHz

2.1 nH

The bias inductor should have a self-resonant frequency greater than the

intended frequency of operation.

To test the supply current consumption, power up the device
and apply the desired LO signal. Next, attempt to increase and
decrease the LO frequency. If the current consumption
increases as the LO frequency is decreased, then increase the
value of L4. If the current consumption decreases as the LO
frequency also decreases, then decrease the value of L4. After
determining the optimum inductor value, the current
consumption should be minimized at the desired LO frequency.

Preliminary Technical Data

ADL5350

PrC | Page 19 of 24

Tune the LO port input network for optimum return loss.

Typically, a bandpass network is used to pass the LO signal to
the LOIN pin. It is desirable to block high frequency harmonics
of the LO from the mixer core. LO harmonics cause higher RF
frequency images to be down converted to the desired IF
frequency, and result in a sensitivity degradation. If the
intended LO source has poor harmonic distortion and spectral
purity, it may be necessary to employ a higher order bandpass
filter network. Figure 58 illustrates a simple L-C bandpass filter
used to pass the fundamental frequency of the LO source.
Capacitor C3 is a simple DC block, while the series-inductor
(L3), along with the gate-to-source capacitance of the buffer
amplifier, form a low-pass network. The native gate input of the
LO buffer (FET) presents a rather high input impedance alone.
The gate bias is generated internally using feedback that can
result in a positive return loss at the intended LO frequency. If a
better than -10 dB return loss is desired, it may be necessary to
add shunt resistor to ground before the coupling capacitor (C3)
to present a lower loading impedance to the LO source .

Design the RF and IF filter networks.

Figure 58 depicts simple LC tank filter networks for the IF and
RF port interfaces. The RF port LC network is designed to pass
the RF input signal. The series LC tank has a resonant
frequency at 1/(2LC). At resonance, the series reactances
cancel, which presents a series short to the RF signal. A parallel
LC tank is used on the IF port to reject the RF and LO signals.
At resonance, the parallel LC tank presents an open circuit.

It is necessary to accommodate for the board parasitics, finite Q,
and self-resonant frequencies of the LC components when
designing the RF, IF, and LO filter networks. Table 9 provides
suggested values for initial prototyping.

Table 9. Suggested RF, IF, and LO Filter Networks for Low-Side LO Injection

RF Frequency

C1 L2 C2 L3 C3

450 MHz

8.3 nH

10 pF

10 nH

10 pF

10 nH

100 pF

850 MHz

6.8 nH

4.7 pF

4.7 nH

5.6 pF

8.2 nH

100 pF

1950 MHz

1.7 nH

1.5 pF

1.7 nH

1.2 pF

3.5 nH

100 pF

2400 MHz

0.67 nH

1 pF

1.5 nH

0.7pF

3.0 nH

100 pF

The inductor should have a self-resonant frequency greater than the intended frequency of operation. L1 should be a high Q inductor for optimum
NF performance.

ADL5350

Preliminary Technical Data

Rev. PrC | Page 20 of 24

APPLICATIONS

LOW FREQUENCY APPLICATIONS

Using an external capacitor from the GC pin to VPOS makes it
possible to operate the ADL5350 at frequencies below 100 MHz.
This capacitor is required because the internal capacitor
between the LO buffer and the gate of the device is only 4 pF.
This capacitance combined with the gate resistance causes a
high-pass filter corner of 80 MHz.

6
0

GND

INPUT

VPOS

INPUT

OR OUTPUT

OUTPUT

OR INPUT

Figure 59. Block Diagram

This high-pass filter corner decreases the LO energy that is
reaching the mixer core. Using a 47 pF capacitor between VPOS
and GC reduces this corner frequency to 7 MHz.

The circuit in Figure 60 is designed for a RF of 70 MHz and an
IF of 10.7 MHz. The LO is at 59.3 MHz (Low Side LO). The
series resonant circuit is designed for 70 MHz and the parallel
resonant circuit is designed for 65 MHz.

6
1

RF/IF

GND2

LOIN

GND1

RF/IF

VPOS

270nH

10nF

4.7µF

56pF 47pF

100nH

10nF

47pF

10nF

100nH

GND1

ADL5350

ALL INDUCTORS

ARE 0603CS

SERIES FROM

COILCRAFT

Figure 60. 70 MHz to 10.7 MHz Down-Conversion Schematic

Preliminary Technical Data

ADL5350

PrC | Page 21 of 24

70 MHz RECEIVE PERFORMANCE

= 3 V, T

= 25°C, LO power = 4 dBm, re: 50 , unless

otherwise noted.

Table 10.

Parameter

Unit

RF Frequency

MHz

LO Frequency

59.3

MHz

IF Frequency

10.7

MHz

Conversion Loss

6.7

SSB Noise Figure

6.7

Input Third-Order Intercept

27.3

dBm

Supply Voltage

Supply Current

Table 11 shows the spur performance for RF = 70 MHz and
LO = 59.3 MHz; RFin = -5 dBm, Loin=4 dBm; all values in dBc
referenced to RFin.

Note that higher order spurious components falling in-band do
become an issue as the bandwidth of the desired signal
increases. Therefore, while operation at IF frequencies as low as
10 MHz is possible, the bandwidth of this signal needs to be
taken into consideration.

Table 11. N × f

- M × f

-Mixer Spurious Products

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

11.0

12.0

13.0

14.0

15.0

0.0 -6.8 -30.5 -23.3 -30.5 -28.9 -34.9 -41.1 -45.7 -37.8 -39.7 -42.3 -37.5 -48.8 -40.1 -39.1 -37.4

1.0 -15.3 -6.8 -18.1 -37.3 -19.8 -22.6 -41.5 -24.2 -26.9 -42.4 -27.7 -30.1 -43.4 -30.2 -32.9 -44.3

2.0 -51.5 -66.0 -57.8 -57.4 -63.1 -57.8 -55.6 -59.2 -56.3 -55.7 -61.3 -57.1 -55.7 -58.3 -56.8 -57.6

3.0 -71.4 -78.8 -73.1 -75.1 -80.6 -81.8 -78.3 -78.2 -72.3 -82.3 -77.7 -82.4 -76.3 -73.3 -74.3 -79.2

4.0 -82.9 -78.6 -81.0 -84.2 -79.7 -77.5 -76.6 -79.0 -74.9 -75.0 -75.8 -76.3 -89.2 -76.7 -87.9 -76.1

5.0 -76.2 -82.9 -78.6 -75.4 -78.7 -84.9 -77.6 -79.2 -84.5 -85.0 -75.9 -81.3 -74.9 -98.6 -73.6 -90.4

6.0 -88.6 -74.6 -79.1 -80.2 -77.1 -76.1 -85.8 -76.2 -81.2 -82.9 -89.7 -75.4 -82.9 -85.4 -78.1 -75.9

7.0 -90.6 -76.7 -79.9 -80.6 -81.0 -83.4 -73.1 -76.8 -77.9 -84.6 -80.0 -78.4 -73.2 -75.2 -79.3 -90.9

8.0 -81.8 -80.4 -84.6 -84.9 -79.5 -83.1 -80.1 -78.6 -89.9 -78.7 -75.3 -77.0 -81.6 -86.3 -85.0 -77.1

9.0 -90.2 -78.3 -80.2 -71.9 -73.9 -85.8 -82.2 -86.6 -80.2 -78.7 -79.1 -71.2 -78.8 -76.0 -84.5 -81.8

10.0 -78.2 -82.1 -80.3 -73.5 -86.6 -86.1 -81.0 -86.0 -78.2 -86.2 -87.1 -83.7 -79.8 -75.0 -83.8 -82.4

11.0 -77.6 -85.8 -78.4 -85.1 -86.6 -80.1 -79.4 -78.8 -69.3 -82.8 -81.6 -94.2 -81.7 -80.5 -84.1 -77.2

12.0 -89.4 -90.8 -80.8 -71.7 -73.4 -75.5 -82.2 -76.8 -72.1 -78.0 -76.3 -84.9 -85.6 -78.7 -71.8 -85.1

13.0 -80.0 -82.5 -79.6 -82.0 -78.9 -78.5 -73.4 -80.4 -84.9 -81.5 -79.4 -79.1 -76.1 -82.8 -77.8 -71.7

14.0 -86.3 -85.6 -89.2 -85.6 -82.7 -74.4 -88.1 -77.6 -74.4 -79.0 -85.4 -89.1 -88.4 -77.2 -81.1 -80.0

15.0 -84.4 -81.9 -81.1 -87.9 -77.7 -83.3 -78.4 -81.9 -90.0 -73.3 -84.6 -77.8 -81.7 -81.2 -93.2 -71.4

ADL5350

Preliminary Technical Data

Rev. PrC | Page 22 of 24

HIGH FREQUENCY APPLICATIONS

The ADL5350 can be used at extended frequencies with some
careful attention to board and component parasitics. Figure 61
is an example of a 2.3 GHz to 2.5 GHz down-conversion using a
low-side LO. The performance of this circuit is depicted in
Figure 62. Note that the inductor and capacitor values are very
small, especially for the RF and IF ports. Above 2.5 GHz, it is
necessary to consider alternate solutions to avoid unreasonably
small inductor and capacitor values.

0
56

-
0

6
2

RF/IF

GND2

LOIN

GND1

RF/IF

VPOS

2.1nH

100pF

4.7µF

0.7pF

1.5nH

1nF

1pF

0.67nH

GND1

ADL5350

3.0nH

100pF

ALL INDUCTORS

ARE 0302CS

SERIES FROM

COILCRAFT

Figure 61. 2.3 GHz to 2.5 GHz Down-Conversion Schematic

10

12

2200

2250

2300

2350

2400

2450

2500

GAIN

IP1dB

IIP3

IIP

3
,
IP

1
d

(

)

I
O

I
N

(
d

RF FREQUENCY (MHz)

Figure 62. Measured Performance for Circuit in Figure 61

Using Low-Side LO Injection and 374 MHz IF

The typical networks used for cellular applications below
2.5 GHz utilize band-select and band-reject networks on the RF
and IF ports. At higher RF frequencies, these networks are not
easily realized using lumped element components (discrete Ls
and Cs). As a result, it is necessary to consider alternate filter
network topologies to allow more reasonable values of
inductors and capacitors.

Figure 63 depicts a cross-over filter network approach to
provide isolation between the RF and IF ports for a down-
converting application. The cross-over network essentially
provides a high-pass filter to allow the RF signal to pass to the
RF/IF node (Pin 1 and Pin 8), while presenting a low-pass filter,
(which is actually band-pass when considering the DC blocking
capacitor, C

). This allows the difference component (f

)

to be passed to the desired IF load.

RF/IF

GND2

LOIN

GND1

RF/IF

VPOS

3.8nH

100pF

1.8pF

1.5nH

100pF

1.2pF

100pF

3.5nH

GND1

ADL5350

3.5nH

4.7µF

ALL

INDUCTORS

ARE 0302CS

SERIES FROM

COILCRAFT

Figure 63. 3.3 GHz to 3.8 GHz Down-Conversion Schematic

When designing the RF and IF port networks, it is important to
remember that the networks share a common node (the RF/IF
pins). In addition, the opposing network presents some loading
impedance to the target network being designed. Classic audio
crossover filter design techniques can be applied to help derive
component values. However, some caution must be applied
when selecting component values. At high RF frequencies, the
board parasitics may significantly influence the final optimum
inductor and capacitor component selections. Some empirical
testing may be necessary to optimize the RF and IF port filter
networks. The performance of the circuit depicted in Figure 63
is provided in Figure 64.

IIP3

10

3300 3350 3400 3450 3500 3550 3600 3650 3700 3750 3800

1
d

,
I

I
P

3
(

)

I
O

I
N

(
d

RF FREQUENCY (MHz)

IP1dB

GAIN

Figure 64. Measured Performance for Circuit in Figure 63

Preliminary Technical Data

ADL5350

Rev. PrC | Page 23 of 24

EVALUATION BOARD

An evaluation board is available for the ADL5350. The evaluation board has two halves: a low band designated as Board A, and a high
band board designated as Board B. The schematic for the evaluation board is presented in Figure 65.

RF/IF

GND2

LOIN

GND1

RF/IF

VPOS

L4-B

C2-B

L2-B

C6-B

C1-B

LO-B

C3-B

L3-B

L1-B

VPOS-B

IF-B

GND1

ADL5350

U1-B

C4-B

C5-B

RF-B

RF/IF

GND2

LOIN

GND1

RF/IF

VPOS

L4-A

C2-A

L2-A

C6-A

C1-A

LO-A

C3-A

L3-A

L1-A

VPOS-A

IF-A

GND1

ADL5350

U1-A

C4-A

C5-A

RF-A

Figure 65. Evaluation Board

Table 12. Evaluation Board Configuration Options

Component Function

Default Conditions

C4-A, C4-B,
C5-A, C5-B

Supply Decoupling. C4-A and C4-B provide local bypassing of the supply.
C5-A and C5-B are used to filter the ripple of a noisy supply line. These are not
always necessary.

C4-A = C4-B = 100 pF
C5-A = C5-B = 4.7 F

L1-A, L1-B,
C1-A, C1-B

RF Input Network.
Designed to provide series resonance at the intended RF frequency.

L1-A = 6.8 nH (0603CS from Coilcraft)
L1-B = 1.7 nH (0302CS from Coilcraft)
C1-A = 4.7 pF, C1-B = 1.5 pF

L2-A, L2-B,
C2-A, C2-B,
C6-A, C6-B

IF Output Network.
Designed to provide parallel resonance at the geometric mean of the RF and LO
frequencies.

L2-A = 4.7 nH (0603CS from Coilcraft)
L2-B = 1.7 nH (0302CS from Coilcraft)
C2-A = 5.6 pF, C2-B = 1.2 pF
C6-A = C6-B = 1 nF

L3-A, L3-B,
C3-A, C3-B

LO Input Network.
Designed to block DC and optimize LO voltage swing
at LOIN.

L3-A = 8.2 nH (0603CS from Coilcraft)
L3-B = 3.5 nH (0302CS from Coilcraft)
C3-A = C3-B = 100 pF

L4-A, L4-B

LO Buffer Amp Choke.
Provides bias and ac loading impedance to LO buffer amp.

L4-A = 24 nH (0603CS from Coilcraft)
L4-B = 3.8 nH (0302CS from Coilcraft)

ADL5350

Preliminary Technical Data

Rev. PrC | Page 24 of 24

OUTLINE DIMENSIONS

0.30
0.23
0.18

SEATING

PLANE

0.20 REF

0.80 MAX
0.65 TYP

1.00
0.85
0.80

1.89
1.74
1.59

0.50 BSC

0.60
0.45
0.30

0.55
0.40
0.30

0.15
0.10
0.05

0.25
0.20
0.15

BOTTOM VIEW

3.25
3.00
2.75

1.95
1.75
1.55

2.95
2.75
2.55

PIN 1

INDICATOR

2.25
2.00
1.75

TOP VIEW

0.05 MAX
0.02 NOM

12° MAX

EXPOSED PAD

Figure 66. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD]

2 mm × 3 mm Body, Very Thin, Dual Lead

(CP-8-1)

Dimensions shown in millimeters

ORDERING GUIDE

Models

Temperature
Range Package

Description

Package
Option Branding

Ordering
Quantity

ADL5350ACPZ-R2

-40°C to +85°C

8-Lead Lead Frame Chip Scale Package [LFCSP_VD]

CP-8-1

250, Reel

ADL5350ACPZ-R7

-40°C to +85°C

8-Lead Lead Frame Chip Scale Package [LFCSP_VD]

CP-8-1

3000, Reel

ADL5350ACPZ-WP

-40°C to +85°C

8-Lead Lead Frame Chip Scale Package [LFCSP_VD]

CP-8-1

50, Waffle Pack

ADL5350-EVAL

Evaluation

Board

Z = Pb-free part.

PR05615-0-12/05(PrC)

Part Number ADL5350