General Description
The MAX5304 combines a low-power, voltage-output,
10-bit digital-to-analog converter (DAC) and a precision
output amplifier in an 8-pin µMAX package. It operates
from a single +5V supply, drawing less than 280µA of
supply current.
The output amplifier's inverting input is available to the
user, allowing specific gain configurations, remote
sensing, and high output-current capability. This makes
the MAX5304 ideal for a wide range of applications,
including industrial process control. Other features
include a software shutdown and power-on reset.
The serial interface is SPITM/QSPITM/MICROWIRETM
compatible. The DAC has a double-buffered input,
organized as an input register followed by a DAC regis-
ter. A 16-bit serial word loads data into the input regis-
ter. The DAC register can be updated independently or
simultaneously with the input register. All logic inputs
are TTL/CMOS-logic compatible and buffered with
Schmitt triggers to allow direct interfacing to optocou-
plers.
Applications
Digital Offset and Gain Adjustment
Industrial Process Control
Microprocessor-Controlled Systems
Portable Test Instruments
Remote Industrial Control
Features
o 10-Bit DAC with Configurable Output Amplifier
o +5V Single-Supply Operation
o Low Supply Current
0.28mA Normal Operation
2µA Shutdown Mode
o Available in 8-Pin µMAX
o Power-On Reset Clears DAC Output to Zero
o SPI/QSPI/MICROWIRE Compatible
o Schmitt-Trigger Digital Inputs for Direct
Optocoupler Interface
MAX5304
10-Bit Voltage-Output DAC
in 8-Pin µMAX
________________________________________________________________ Maxim Integrated Products
1
MAX5304
OUT
FB
CS
DIN
SCLK
DAC
REF
DAC
REGISTER
INPUT
REGISTER
CONTROL
V
DD
GND
16-BIT
SHIFT
REGISTER
Functional Diagram
REF
DIN
FB
SCLK
1
2
8
7
V
DD
GND
CS
OUT
MAX5304
µMAX
TOP VIEW
3
4
6
5
Pin Configuration
19-1562; Rev 0; 10/99
PART
MAX5304CUA
MAX5304EUA
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
8 µMAX
8 µMAX
_________________Ordering Information
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX5304
10-Bit Voltage-Output DAC
in 8-Pin µMAX
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 8, V
DD
= +5V ±10%, V
REF
= +2.5V, R
L
= 5k
, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C. Output buffer connected in unity-gain configuration.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND...............................................................-0.3V to +6V
REF, OUT, FB to GND.................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs to GND................................................-0.3V to +6V
Continuous Current into Any Pin.......................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.10mW/°C above+70°C) ..........330mW
Operating Temperature Ranges
MAX5304CUA ...................................................0°C to +70°C
MAX5304EUA ................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)........................... ......+300°C
Code dependent, minimum at code 1550 hex
4.5V
V
DD
5.5V
Guaranteed monotonic
CONDITIONS
k
18
30
R
REF
Reference Input Resistance
V
0
V
DD
- 1.4
V
REF
Reference Input Range
µV/V
PSRR
Power-Supply Rejection Ratio
800
Bits
10
N
Resolution
ppm/°C
1
Gain-Error Tempco
LSB
GE
Gain Error (Note 1)
-0.3
±2
ppm/°C
6
TCV
OS
Offset-Error Tempco
LSB
DNL
Differential Nonlinearity
±1.0
±0.3
±8
mV
V
OS
Offset Error
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
LSB
±4
INL
Integral Nonlinearity
(Note 1)
V
REF
= 0.67Vp-p
kHz
650
Reference -3dB Bandwidth
Input code = all 0s, V
REF
= 3.6Vp-p at 1kHz
V
REF
= 1Vp-p at 25kHz, code = full scale
dB
77
SINAD
Signal-to-Noise Plus
Distortion Ratio
dB
-84
Reference Feedthrough
V
2.4
V
IH
Input High Voltage
V
IN
= 0 or V
DD
pF
8
C
IN
Input Capacitance
µA
0.001
±0.5
I
IN
Input Leakage Current
V
0.8
V
IL
Input Low Voltage
STATIC PERFORMANCE--ANALOG SECTION
DIGITAL INPUTS
REFERENCE INPUT
MULTIPLYING-MODE PERFORMANCE
MAX5304
10-Bit Voltage-Output DAC
in 8-Pin µMAX
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 8, V
DD
= +5V ±10%, V
REF
= +2.5V, R
L
= 5k
, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C. Output buffer connected in unity-gain configuration.)
(Note 3)
CS = V
DD
, DIN = 100kHz
Rail-to-rail (Note 2)
To ±1/2LSB, V
STEP
= 2.5V
CONDITIONS
mA
0.28
0.4
I
DD
Supply Current
V
4.5
5.5
V
DD
Supply Voltage
nVs
5
Digital Feedthrough
µs
20
Start-Up Time
µA
0.001
±0.1
Current into FB
V
0 to V
DD
Output Voltage Swing
µs
10
Output Settling Time
V/µs
0.6
SR
Voltage Output Slew Rate
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
(Note 3)
µA
4
20
Supply Current in Shutdown
µA
0.001
±0.5
Reference Current in Shutdown
ns
40
t
CH
SCLK Pulse Width High
ns
100
t
CP
SCLK Clock Period
ns
40
t
CSS
CS Fall to SCLK Rise Setup Time
ns
40
t
DS
DIN Setup Time
ns
0
t
CSH
SCLK Rise to CS Rise Hold Time
ns
40
t
CL
SCLK Pulse Width Low
ns
40
t
CS1
CS Rise to SCLK Rise Hold Time
ns
100
t
CSW
CS Pulse Width High
ns
40
t
CS0
SCLK Rise to CS Fall Delay
ns
0
t
DH
DIN Hold Time
Note 1: Guaranteed from code 3 to code 1023 in unity-gain configuration.
Note 2: Accuracy is better than 1LSB for V
OUT
= 8mV to (V
DD
- 100mV), guaranteed by a power-supply rejection test at the end
points.
Note 3: R
L
=
, digital inputs at GND or V
DD
.
DIGITAL INPUTS
DYNAMIC PERFORMANCE
POWER SUPPLIES
TIMING CHARACTERISTICS (Figure 6)
MAX5304
10-Bit Voltage-Output DAC
in 8-Pin µMAX
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(V
DD
= +5V, R
L
= 5k
, C
L
= 100pF, T
A
= +25°C, unless otherwise noted.)
INL (LSB)
-0.050
0.4
1.2
2.0
2.8
3.6
REFERENCE VOLTAGE (V)
MAX5304-01
4.4
0.050
0.025
0
-0.025
INTEGRAL NONLINEARITY
vs. REFERENCE VOLTAGE
0
-4
-8
-12
-16
-20
500k
0
1M
1.5M
2M
2.5M
3M
MAX5304-02
RELATIVE OUTPUT (dB)
REFERENCE VOLTAGE INPUT
FREQUENCY RESPONSE
FREQUENCY (Hz)
400
380
360
340
320
300
280
260
240
220
200
-60
-20
20
60
100
140
MAX5304-03
SUPPLY CURRENT (
µ
A)
SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
R
L
=
10
9
8
7
6
5
4
3
2
1
0
-60
-20
20
60
100
140
MAX5304-04
POWER-DOWN SUPPLY CURRENT (
µ
A)
POWER-DOWN SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
-100
0.5
1.6
3.8
OUTPUT FFT PLOT
-60
0
MAX5304-07
FREQUENCY (kHz)
SIGNAL AMPLITUDE (dB)
2.7
4.9
6.0
-20
-40
-80
V
REF
= +3.6Vp-p
CODE = FULL SCALE
f
IN
= 1kHz
4.0
4.4
4.8
6.0
5.2
5.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5304-05
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
400
350
500
450
300
250
150
100
200
50
0
-50
-90
1
100
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
-85
MAX5304-06
FREQUENCY (kHz)
THD + NOISE (dB)
-70
-60
10
-55
-80
-75
-65
V
REF
= +2.5V
DC
+ 1Vp-p SINE
CODE = FULL SCALE
2.49956
2.49960
2.49964
2.49968
2.49972
2.49976
2.49980
0.1k
1k
10k
1M
100k
OUTPUT VOLTAGE
vs. LOAD
MAX5304-08
LOAD (
)
OUTPUT VOLTAGE (V)
-100
0.5
1.6
3.8
REFERENCE FEEDTHROUGH
AT 1kHz
-60
0
MAX5304-09a/09b
FREQUENCY (kHz)
SIGNAL AMPLITUDE (dB)
2.7
4.9
6.0
-20
-40
-80
OUTPUT FEEDTHROUGH
REFERENCE INPUT SIGNAL
MAX5304
10-Bit Voltage-Output DAC
in 8-Pin µMAX
_______________________________________________________________________________________
5
2
µs/div
OUT
AC-COUPLED
10mV/div
CODE = 512
DIGITAL FEEDTHROUGH (f
SCLK
= 100kHz)
MAX5304-11a
SCLK
2V/div
CS = 5V
____________________________Typical Operating Characteristics (continued)
(V
DD
= +5V, R
L
= 5k
, C
L
= 100pF, T
A
= +25°C, unless otherwise noted.)
10
µs/div
MAJOR-CARRY TRANSITION
MAX5304-10a
OUT
AC-COUPLED
100mV/div
CS
5V/div
10
µs/div
DYNAMIC RESPONSE
MAX5304-12a
OUT
1V/div
GND
GAIN = +2V/V, SWITCHING FROM CODE 0 TO 1005
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