REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD8350
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
Low Distortion
1.0 GHz Differential Amplifier
FUNCTIONAL BLOCK DIAGRAMS
FEATURES
High Dynamic Range
Output IP3: +22 dBm: Re 50 @ 250 MHz
Low Noise Figure: 5.9 dB @ 250 MHz
Two Gain Versions:
AD8350-15
15 dB
AD8350-20
20 dB
3 dB Bandwidth: 1.0 GHz
Single Supply Operation: +5 V to +10 V
Supply Current: 28 mA
Input/Output Impedance: 200
Single-Ended or Differential Input Drive
8-Lead SOIC Package
APPLICATIONS
Cellular Base Stations
Communications Receivers
RF/IF Gain Block
Differential A-to-D Driver
SAW Filter Interface
Single-Ended to Differential Conversion
High Performance Video
High Speed Data Transmission
PRODUCT DESCRIPTION
The AD8350 series are high performance fully-differential
amplifiers useful in RF and IF circuits up to 1000 MHz. The
amplifier has excellent noise figure of 5.9 dB at 250 MHz. It
offers a high output third order intercept (OIP3) of +22 dBm
at 250 MHz. Gain versions of 15 dB and 20 dB are offered.
The AD8350 is designed to meet the demanding performance
requirements of communications transceiver applications. It
enables a high dynamic range differential signal chain, with
exceptional linearity and increased common-mode rejection.
The device can be used as a general purpose gain block, an
A-to-D driver, and high speed data interface driver, among
other functions. The AD8350 input can also be used as a single-
ended-to-differential converter.
The amplifier can be operated down to +5 V with an OIP3 of
+22 dBm at 250 MHz and slightly reduced distortion perfor-
mance. The wide bandwidth, high dynamic range and tempera-
ture stability make this product ideal for the various RF and IF
frequencies required in cellular, CATV, broadband, instrumen-
tation and other applications.
The AD8350 is offered in an 8-lead single SOIC package. It
operates from +5 V and +10 V power supplies, drawing 28 mA
typical. The AD8350 offers a power enable function for power-
sensitive applications. The AD8350 is fabricated using Analog
Devices' proprietary high speed complementary bipolar process.
The device is available in the industrial (40
°
C to +85
°
C)
temperature range.
8-Lead SOIC Package (with Enable)
1
2
3
4
8
7
6
5
AD8350
IN+
IN
ENBL
OUT+
OUT
V
CC
GND
+
GND
REV. 0
2
AD8350-15SPECIFICATIONS
(@ +25 C, V
S
= +5 V, G = 15 dB, unless otherwise noted. All specifications refer
to differential inputs and differential outputs unless noted.)
Parameter
Conditions
Min
Typ
Max
Units
DYNAMIC PERFORMANCE
3 dB Bandwidth
V
S
= +5 V, V
OUT
= 1 V p-p
0.9
GHz
V
S
= +10 V, V
OUT
= 1 V p-p
1.1
GHz
Bandwidth for 0.1 dB Flatness
V
S
= +5 V, V
OUT
= 1 V p-p
270
MHz
V
S
= +10 V, V
OUT
= 1 V p-p
270
MHz
Slew Rate
V
OUT
= 1 V p-p
2000
V/
µ
s
Settling Time
0.1%, V
OUT
= 1 V p-p
10
ns
Gain (S21)
1
V
S
= +5 V, f = 50 MHz
14
15
16
dB
Gain Supply Sensitivity
V
S
= +5 V to +10 V, f = 50 MHz
0.003
dB/V
Gain Temperature Sensitivity
T
MIN
to T
MAX
0.002
dB/
°
C
Isolation (S12)
1
f = 50 MHz
18
dB
NOISE/HARMONIC PERFORMANCE
50 MHz Signal
Second Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
66
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
67
dBc
Third Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
65
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
70
dBc
Output Second Order Intercept
2
V
S
= +5 V
52
dBm
V
S
= +10 V
52
dBm
Output Third Order Intercept
2
V
S
= +5 V
22
dBm
V
S
= +10 V
23
dBm
250 MHz Signal
Second Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
48
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
49
dBc
Third Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
52
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
61
dBc
Output Second Order Intercept
2
V
S
= +5 V
33
dBm
V
S
= +10 V
34
dBm
Output Third Order Intercept
2
V
S
= +5 V
18
dBm
V
S
= +10 V
22
dBm
1 dB Compression Point (RTI)
2
V
S
= +5 V
2
dBm
V
S
= +10 V
5
dBm
Voltage Noise (RTI)
f = 150 MHz
1.7
nV/
Hz
Noise Figure
f = 150 MHz
6.8
dB
INPUT/OUTPUT CHARACTERISTICS
Differential Offset Voltage (RTI)
V
OUT+
V
OUT
±
1
mV
Differential Offset Drift
T
MIN
to T
MAX
0.02
mV/
°
C
Input Bias Current
15
µ
A
Input Resistance
Real
200
Input Capacitance
2
pF
CMRR
f = 50 MHz
67
dB
Output Resistance
Real
200
Output Capacitance
2
pF
POWER SUPPLY
Operating Range
+4
+11.0
V
Quiescent Current
Powered Up, V
S
= +5 V
25
28
32
mA
Powered Down, V
S
= +5 V
3
3.8
5.5
mA
Powered Up, V
S
= +10 V
27
30
34
mA
Powered Down, V
S
= +10 V
3
4
6.5
mA
Power-Up/Down Switching
15
ns
Power Supply Rejection Ratio
f = 50 MHz, V
S
= 1 V p-p
58
dB
OPERATING TEMPERATURE RANGE
40
+85
°
C
NOTES
1
See Tables IIV for complete list of S-Parameters.
2
Re: 50
.
Specifications subject to change without notice.
REV. 0
3
AD8350
(@ +25 C, V
S
= +5 V, G = 20 dB, unless otherwise noted. All
specifications refer to differential inputs and differential outputs
unless noted.)
Parameter
Conditions
Min
Typ
Max
Units
DYNAMIC PERFORMANCE
3 dB Bandwidth
V
S
= +5 V, V
OUT
= 1 V p-p
0.7
GHz
V
S
= +10 V, V
OUT
= 1 V p-p
0.9
GHz
Bandwidth for 0.1 dB Flatness
V
S
= +5 V, V
OUT
= 1 V p-p
230
MHz
V
S
= +10 V, V
OUT
= 1 V p-p
200
MHz
Slew Rate
V
OUT
= 1 V p-p
2000
V/
µ
s
Settling Time
0.1%, V
OUT
= 1 V p-p
15
ns
Gain (S21)
1
V
S
= +5 V, f = 50 MHz
19
20
21
dB
Gain Supply Sensitivity
V
S
= +5 V to +10 V, f = 50 MHz
0.003
dB/V
Gain Temperature Sensitivity
T
MIN
to T
MAX
0.002
dB/
°
C
Isolation (S12)
1
f = 50 MHz
22
dB
NOISE / HARMONIC PERFORMANCE
50 MHz Signal
Second Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
65
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
66
dBc
Third Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
66
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
70
dBc
Output Second Order Intercept
2
V
S
= +5 V
50
dBm
V
S
= +10 V
50
dBm
Output Third Order Intercept
2
V
S
= +5 V
22
dBm
V
S
= +10 V
23
dBm
250 MHz Signal
Second Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
45
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
46
dBc
Third Harmonic
V
S
= +5 V, V
OUT
= 1 V p-p
55
dBc
V
S
= +10 V, V
OUT
= 1 V p-p
60
dBc
Output Second Order Intercept
2
V
S
= +5 V
31
dBm
V
S
= +10 V
32
dBm
Output Third Order Intercept
2
V
S
= +5 V
18
dBm
V
S
= +10 V
22
dBm
1 dB Compression Point (RTI)
2
V
S
= +5 V
2.6
dBm
V
S
= +10 V
1.8
dBm
Voltage Noise (RTI)
f = 150 MHz
1.7
nV/
Hz
Noise Figure
f = 150 MHz
5.6
dB
INPUT/OUTPUT CHARACTERISTICS
Differential Offset Voltage (RTI)
V
OUT+
V
OUT
±
1
mV
Differential Offset Drift
T
MIN
to T
MAX
0.02
mV/
°
C
Input Bias Current
15
µ
A
Input Resistance
Real
200
Input Capacitance
2
pF
CMRR
f = 50 MHz
52
dB
Output Resistance
Real
200
Output Capacitance
2
pF
POWER SUPPLY
Operating Range
+4
+11.0
V
Quiescent Current
Powered Up, V
S
= +5 V
25
28
32
mA
Powered Down, V
S
= +5 V
3
3.8
5.5
mA
Powered Up, V
S
= +10 V
27
30
34
mA
Powered Down, V
S
= +10 V
3
4
6.5
mA
Power-Up/Down Switching
15
ns
Power Supply Rejection Ratio
f = 50 MHz, V
S
= 1 V p-p
45
dB
OPERATING TEMPERATURE RANGE
40
+85
°
C
NOTES
1
See Tables IIV for complete list of S-Parameters.
2
Re: 50
.
Specifications subject to change without notice.
AD8350-20SPECIFICATIONS
REV. 0
AD8350
4
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 the AD8350 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.
WARNING!
ESD SENSITIVE DEVICE
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
AD8350AR15
40
°
C to +85
°
C
8-Lead SOIC
SO-8
AD8350AR15-REEL
1
40
°
C to +85
°
C
8-Lead SOIC
SO-8
AD8350AR15-REEL7
2
40
°
C to +85
°
C
8-Lead SOIC
SO-8
AD8350AR15-EVAL
Evaluation Board (15 dB)
AD8350AR20
40
°
C to +85
°
C
8-Lead SOIC
SO-8
AD8350AR20-REEL
1
40
°
C to +85
°
C
8-Lead SOIC
SO-8
AD8350AR20-REEL7
2
40
°
C to +85
°
C
8-Lead SOIC
SO-8
AD8350AR20-EVAL
Evaluation Board (20 dB)
NOTES
1
13" Reels of 2500 each.
2
7" Reels of 750 each.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage, V
S
. . . . . . . . . . . . . . . . . . . . . . . . . . . . +11 V
Input Power Differential . . . . . . . . . . . . . . . . . . . . . . . +8 dBm
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . 400 mW
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
°
C/W
Maximum Junction Temperature . . . . . . . . . . . . . . . . +125
°
C
Operating Temperature Range . . . . . . . . . . . . 40
°
C to +85
°
C
Storage Temperature Range . . . . . . . . . . . . . 65
°
C to +150
°
C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . +300
°
C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent 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 effect device reliability.
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
8
7
6
5
1
2
3
4
IN+
ENBL
V
CC
OUT+
IN
GND
GND
OUT
AD8350
PIN FUNCTION DESCRIPTIONS
Pin
Function
Description
1, 8
IN+, IN
Differential Inputs. IN+ and IN
should be ac-coupled (pins have a dc
bias of midsupply). Differential input
impedance is 200
.
2
ENBL
Power-up Pin. A high level (5 V) en-
ables the device; a low level (0 V) puts
device in sleep mode.
3
V
CC
Positive Supply Voltage. +5 V to +10 V.
4, 5
OUT+, OUT
Differential Outputs. OUT+ and
OUT should be ac-coupled (pins have
a dc bias of midsupply). Differential
input impedance is 200
.
6, 7
GND
Common External Ground Reference.
REV. 0
AD8350
5
Typical Performance Characteristics
TEMPERATURE C
SUPPLY CURRENT mA
50
40
40
30
20
10
0
20
0
20
40
60
80
V
CC
= 5V
V
CC
= 10V
Figure 1. Supply Current vs.
Temperature
FREQUENCY MHz
IMPEDANCE
350
1
300
250
200
150
100
10
100
1k
V
CC
= 10V
V
CC
= 5V
Figure 4. AD8350-15 Input Imped-
ance vs. Frequency
FREQUENCY MHz
IMPEDANCE
500
1
400
300
200
100
0
10
100
1k
V
CC
= 5V
V
CC
= 10V
Figure 7. AD8350-20 Output Imped-
ance vs. Frequency
FREQUENCY MHz
GAIN dB
20
1
15
10
5
0
10
100
1k
10k
V
CC
= 10V
V
CC
= 5V
Figure 2. AD8350-15 Gain (S21) vs.
Frequency
FREQUENCY MHz
IMPEDANCE
350
1
300
250
200
150
100
10
100
1k
V
CC
= 10V
V
CC
= 5V
Figure 5. AD8350-20 Input Imped-
ance vs. Frequency
FREQUENCY MHz
ISOLATION dB
5
1
10
15
20
25
10
100
1k
10k
V
CC
= 10V
V
CC
= 5V
Figure 8. AD8350-15 Isolation (S12)
vs. Frequency
FREQUENCY MHz
GAIN dB
25
1
20
15
10
5
10
100
1k
10k
V
CC
= 10V
V
CC
= 5V
Figure 3. AD8350-20 Gain (S21) vs.
Frequency
FREQUENCY MHz
IMPEDANCE
500
1
400
300
200
100
0
10
100
1k
V
CC
= 10V
V
CC
= 5V
Figure 6. AD8350-15 Output Imped-
ance vs. Frequency
FREQUENCY MHz
ISOLATION dB
10
1
15
20
25
30
10
100
1k
10k
V
CC
= 10V
V
CC
= 5V
Figure 9. AD8350-20 Isolation (S12)
vs. Frequency
REV. 0
AD8350
6
FUNDAMENTAL FREQUENCY MHz
DISTORTION dBc
40
0
45
50
55
60
65
70
75
80
50
100
150
200
250
300
V
OUT
= 1V p-p
HD3 (V
CC
= 10V)
HD3 (V
CC
= 5V)
HD2 (V
CC
= 5V)
HD2 (V
CC
= 10V)
Figure 10. AD8350-15 Harmonic
Distortion vs. Frequency
OUTPUT VOLTAGE V p-p
DISTORTION dBc
45
0
55
65
75
85
0.5
1
1.5
2
2.5
3
3.5
F
O
= 50MHz
HD3 (V
CC
= 10V)
HD3 (V
CC
= 5V)
HD2 (V
CC
= 5V)
HD2 (V
CC
= 10V)
Figure 13. AD8350-20 Harmonic Dis-
tortion vs. Differential Output Voltage
FREQUENCY MHz
OIP3 dBm (Re: 50
)
35
0
50
100
150
200
250
300
30
25
20
15
10
5
V
CC
= 10V
V
CC
= 5V
Figure 16. AD8350-15 Output
Referred IP3 vs. Frequency
FUNDAMENTAL FREQUENCY MHz
DISTORTION dBc
40
0
45
50
55
60
65
70
75
80
50
100
150
200
250
300
V
OUT
= 1V p-p
HD3 (V
CC
= 10V)
HD3 (V
CC
= 5V)
HD2 (V
CC
= 5V)
HD2 (V
CC
= 10V)
Figure 11. AD8350-20 Harmonic
Distortion vs. Frequency
FREQUENCY MHz
OIP2 dBm (Re: 50
)
60
0
50
100
150
200
250
300
55
50
45
40
35
30
V
CC
= 10V
V
CC
= 5V
Figure 14. AD8350-15 Output
Referred IP2 vs. Frequency
FREQUENCY MHz
OIP3 dBm (Re: 50
)
35
0
50
100
150
200
250
300
30
25
20
15
10
5
V
CC
= 10V
V
CC
= 5V
Figure 17. AD8350-20 Output
Referred IP3 vs. Frequency
OUTPUT VOLTAGE V p-p
DISTORTION dBc
45
0
55
65
75
85
0.5
1
1.5
2
2.5
3
3.5
F
O
= 50MHz
HD3 (V
CC
= 10V)
HD3 (V
CC
= 5V)
HD2 (V
CC
= 5V)
HD2 (V
CC
= 10V)
Figure 12. AD8350-15 Harmonic Dis-
tortion vs. Differential Output Voltage
FREQUENCY MHz
OIP2 dBm (Re: 50
)
60
0
50
100
150
200
250
300
55
50
45
40
35
30
V
CC
= 10V
V
CC
= 5V
Figure 15. AD8350-20 Output
Referred IP2 vs. Frequency
FREQUENCY MHz
1dB COMPRESSION dBm (Re: 50
)
0
100
200
300
400
500
600
7.5
5.0
2.5
0
2.5
5.0
V
CC
= 10V
V
CC
= 5V
INPUT REFERRED
10.0
Figure 18. AD8350-15 1 dB Compres-
sion vs. Frequency
REV. 0
AD8350
7
FREQUENCY MHz
1dB COMPRESSION dBm (Re: 50
)
0
100
200
300
400
500
600
7.5
5.0
2.5
0
2.5
5.0
V
CC
= 10V
V
CC
= 5V
INPUT REFERRED
7.5
Figure 19. AD8350-20 1 dB Compres-
sion vs. Frequency
V
CC
Volts
1
GAIN dB
25
20
15
10
5
0
5
10
15
20
2
3
4
5
6
7
8
9
10
AD8350-20
AD8350-15
Figure 22. AD8350 Gain (S21) vs.
Supply Voltage
FREQUENCY MHz
PSRR dB
20
1
30
40
50
60
70
80
90
10
100
1k
V
CC
= 5V
AD8350-20
AD8350-15
Figure 25. AD8350 CMRR vs.
Frequency
FREQUENCY MHz
NOISE FIGURE dB
10
0
50 100 150 200 250 300 350 400 450 500
9
8
7
6
5
V
CC
= 10V
V
CC
= 5V
Figure 20. AD8350-15 Noise Figure
vs. Frequency
TEMPERATURE C
OUTPUT OFFSET mV
100
40
50
0
50
100
150
200
250
20
0
20
40
60
80
V
OUT
(V
CC
= 5V)
V
OUT
(V
CC
= 10V)
V
OUT
+ (V
CC
= 10V)
V
OUT
+ (V
CC
= 5V)
Figure 23. AD8350 Output Offset
Voltage vs. Temperature
5V
V
CC
= 5V
500mV
30ns
V
OUT
ENBL
Figure 26. AD8350 Power-Up/Down
Response Time
FREQUENCY MHz
NOISE FIGURE dB
10
0
50 100 150 200 250 300 350 400 450 500
9
8
7
6
5
V
CC
= 10V
V
CC
= 5V
Figure 21. AD8350-20 Noise Figure
vs. Frequency
FREQUENCY MHz
PSRR dB
20
1
30
40
50
60
70
80
90
10
100
1k
V
CC
= 5V
AD8350-20
AD8350-15
Figure 24. AD8350 PSRR vs.
Frequency
REV. 0
AD8350
8
APPLICATIONS
Using the AD8350
Figure 27 shows the basic connections for operating the AD8350.
A single supply in the range +5 V to +10 V is required. The
power supply pin should be decoupled using a 0.1
µ
F capacitor.
The ENBL pin is tied to the positive supply or to +5 V (when
V
CC
= +10 V) for normal operation and should be pulled to
ground to put the device in sleep mode. Both the inputs and the
outputs have dc bias levels at midsupply and should be ac-coupled.
Also shown, in Figure 27, are the impedance balancing require-
ments, either resistive or reactive, of the input and output. With
an input and output impedance of 200
, the AD8350 should
be driven by a 200
source and loaded by a 200
impedance.
A reactive match can also be implemented.
Figure 28 shows how the AD8350 can be driven by a single-
ended source. The unused input should be ac-coupled to
ground. When driven single-ended, there will be a slight imbal-
ance in the differential output voltages. This will cause an in-
crease in the second order harmonic distortion (at 50 MHz,
with V
CC
= +10 V and V
OUT
= 1 V p-p, 59 dBc was measured
for the second harmonic on AD8350-15).
8
7
6
5
1
2
3
4
AD8350
+
ENBL (+5V)
+V
S
(+5V TO +10V)
C5
0.1 F
C4
0.001 F
C3
0.001 F
LOAD
Z = 200
C2
0.001 F
C1
0.001 F
SOURCE
Z = 100
Z = 100
Figure 27. Basic Connections for Differential Drive
8
7
6
5
1
2
3
4
AD8350
+
ENBL (+5V)
+V
S
(+5V TO +10V)
C5
0.1 F
C4
0.001 F
C3
0.001 F
LOAD
Z = 200
C2
0.001 F
SOURCE
Z = 200
C1
0.001 F
Figure 28. Basic Connections for Single-Ended Drive
Reactive Matching
In practical applications, the AD8350 will most likely be matched
using reactive matching components as shown in Figure 29.
Matching components can be calculated using a Smith Chart
and the AD8350's S-Parameters (see Tables I and II) along
with those of the devices that are driving and loading it. The S-
Parameters in Tables I and II assume a differential source and
load impedance of 50
. Because the load impedance on the
output of the AD8350 affects the input impedance, a simulta-
neous conjugate match must be performed to correctly match
both input and output.
8
7
6
5
1
2
3
4
AD8350
+
ENBL (+5V)
+V
S
(+5V TO +10V)
C2
0.1 F
C2
C2
C1
C1
L1
L2
Figure 29. Reactively Matching the Input and Output
REV. 0
AD8350
9
Figure 30 shows how the AD8350 input can be matched for a
single-ended drive. The unused input is ac-coupled to ground
using a low impedance (i.e., high value) capacitance. The S-
Parameters for this configuration are shown in Tables III and
IV. These values assume a single-ended source impedance of
50
and a differential load impedance of 50
. As in the case
of a differential drive, a simultaneous conjugate match must be
performed to correctly match both input and output.
8
7
6
5
1
2
3
4
AD8350
+
ENBL
(+5V)
+V
S
(+5V TO +10V)
C2
0.1 F
C2
C2
0.001 F
C1
L2
L1
Figure 30. Matching Circuit for Single-Ended Drive
Evaluation Board
Figure 31 shows the schematic of the AD8350 evaluation board
as it is shipped from the factory. The board is configured to
allow easy evaluation using single-ended 50
test equipment.
The input and output transformers have a 4-to-1 impedance
ratio and transform the AD8350's 200
input and output
impedances to 50
. In this mode, 0
resistors (R1 and R4)
are required.
To allow compensation for the insertion loss of the transform-
ers, a calibration path is provided at Test In and Test Out. This
consists of two transformers connected back to back.
To drive and load the board differentially, transformers T1 and
T2 should be removed and replaced with four 0
resistors
(0805 size); Resistors R1 and R4 (0
) should also be removed.
This yields a circuit with a broadband input and output imped-
ance of 200
. To match to impedances other than this, match-
ing components (0805 size) can be placed on pads C1, C2, C3,
C4, L1 and L2.
8
7
6
5
1
2
3
4
AD8350
+
+V
S
C5
0.1 F
L1
(OPEN)
L2
(OPEN)
C3
0.001 F
C2
0.001 F
C4
0.001 F
+V
S
1
2
3
A
B
SW1
6
1
R2
0
C1
0.001 F
R1
0
T1: TC4-1W
(MINI CIRCUITS)
IN
IN+
R3
0
6
T2: TC4-1W
(MINI CIRCUITS)
R4
0
OUT
OUT+
1
6
T4: TC4-1W
(MINI CIRCUITS)
TEST OUT
6
1
T3: TC4-1W
(MINI CIRCUITS)
TEST IN
1
Figure 31. AD8350 Evaluation Board
REV. 0
AD8350
10
Table I. Typical S Parameters AD8350-15: V
CC
= 5 V, Differential Input Signal.
Z
SOURCE
(diff) = 50 , Z
LOAD
(diff) = 50
Frequency
(MHz)
S11
S12
S21
S22
50
0.791
3
°
0.068
177
°
2.73
3
°
0.795
2
°
100
0.787
6
°
0.071
174
°
2.79
7
°
0.794
5
°
150
0.778
9
°
0.070
172
°
2.91
11
°
0.787
7
°
200
0.766
13
°
0.072
168
°
3.06
16
°
0.779
10
°
250
0.749
17
°
0.074
165
°
3.24
21
°
0.768
12
°
Table II. Typical S Parameters AD8350-20: V
CC
= 5 V, Differential Input Signal.
Z
SOURCE
(diff) = 50 , Z
LOAD
(diff) = 50
Frequency
(MHz)
S11
S12
S21
S22
50
0.810
4
°
0.046
176
°
4.82
2.5
°
0.822
3
°
100
0.795
8
°
0.043
173
°
4.99
6.16
°
0.809
5
°
150
0.790
12
°
0.045
169
°
5.30
9.82
°
0.807
8
°
200
0.776
17
°
0.046
165
°
5.71
14.89
°
0.795
10
°
250
0.757
22
°
0.048
162
°
6.25
21.29
°
0.783
13
°
Table III. Typical S Parameters AD8350-15: V
CC
= 5 V, Single-Ended Input Signal.
Z
SOURCE
(diff) = 50 , Z
LOAD
(diff) = 50
Frequency
(MHz)
S11
S12
S21
S22
50
0.718
6
°
0.068
177
°
2.62
4
°
0.798
3
°
100
0.701
12
°
0.066
173
°
2.66
10
°
0.794
6
°
150
0.683
19
°
0.067
167
°
2.76
15
°
0.789
10
°
200
0.657
24
°
0.069
163
°
2.86
22
°
0.776
13
°
250
0.625
31
°
0.070
159
°
2.98
28
°
0.763
16
°
Table IV. Typical S Parameters AD8350-20: V
CC
= 5 V, Single-Ended Input Signal.
Z
SOURCE
(diff) = 50 , Z
LOAD
(diff) = 50
Frequency
(MHz)
S11
S12
S21
S22
50
0.747
7
°
0.040
175
°
4.71
4
°
0.814
3
°
100
0.739
14
°
0.042
170
°
4.82
9
°
0.813
6
°
150
0.728
21
°
0.044
166
°
5.08
15
°
0.804
10
°
200
0.698
29
°
0.045
161
°
5.37
22
°
0.792
13
°
250
0.659
37
°
0.048
156
°
5.76
30
°
0.774
16
°
REV. 0
AD8350
11
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
8-Lead Plastic SOIC
(SO-8)
8
5
4
1
0.1968 (5.00)
0.1890 (4.80)
0.2440 (6.20)
0.2284 (5.80)
PIN 1
0.1574 (4.00)
0.1497 (3.80)
0.0500 (1.27)
BSC
0.0688 (1.75)
0.0532 (1.35)
SEATING
PLANE
0.0098 (0.25)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
0.0098 (0.25)
0.0075 (0.19)
0.0500 (1.27)
0.0160 (0.41)
8
0
0.0196 (0.50)
0.0099 (0.25)
45
C357784/99
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