19-1562; Rev 0; 10/99
10-Bit Voltage-Output DAC
in 8-Pin µMAX
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 SPI™/QSPI™/MICROWIRE™
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.
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
Features
o
10-Bit DAC with Configurable Output Amplifier
MAX5304
Applications
Digital Offset and Gain Adjustment
Industrial Process Control
Microprocessor-Controlled Systems
Portable Test Instruments
Remote Industrial Control
_________________Ordering Information
PART
MAX5304CUA
MAX5304EUA
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 µMAX
Functional Diagram
GND
V
DD
REF
FB
OUT
DAC
OUT
1
CS
2
INPUT
REGISTER
CS
DIN
SCLK
DIN
3
SCLK
4
16-BIT
SHIFT
REGISTER
Pin Configuration
TOP VIEW
DAC
REGISTER
CONTROL
8
V
DD
GND
REF
FB
MAX5304
7
6
5
MAX5304
µMAX
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________
Maxim Integrated Products
1
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.
10-Bit Voltage-Output DAC
in 8-Pin µMAX
MAX5304
ABSOLUTE MAXIMUM RATINGS
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
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.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 8, V
DD
= +5V ±10%, V
REF
= +2.5V, R
L
= 5kΩ, 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.)
PARAMETER
Resolution
Differential Nonlinearity
Integral Nonlinearity
(Note 1)
Offset Error
Offset-Error Tempco
Gain Error (Note 1)
Gain-Error Tempco
Power-Supply Rejection Ratio
REFERENCE INPUT
Reference Input Range
Reference Input Resistance
Reference -3dB Bandwidth
Reference Feedthrough
Signal-to-Noise Plus
Distortion Ratio
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Leakage Current
Input Capacitance
V
IH
V
IL
I
IN
C
IN
V
IN
= 0 or V
DD
0.001
8
2.4
0.8
±0.5
V
V
µA
pF
SINAD
V
REF
R
REF
Code dependent, minimum at code 1550 hex
V
REF
= 0.67Vp-p
Input code = all 0s, V
REF
= 3.6Vp-p at 1kHz
V
REF
= 1Vp-p at 25kHz, code = full scale
0
18
30
650
-84
77
V
DD
- 1.4
V
kΩ
kHz
dB
dB
PSRR
4.5V
≤
V
DD
≤
5.5V
SYMBOL
N
DNL
INL
V
OS
TCV
OS
GE
±0.3
6
-0.3
1
800
±2
Guaranteed monotonic
CONDITIONS
MIN
10
±1.0
±4
±8
TYP
MAX
UNITS
Bits
LSB
LSB
mV
ppm/°C
LSB
ppm/°C
µV/V
STATIC PERFORMANCE—ANALOG SECTION
MULTIPLYING-MODE PERFORMANCE
2
_______________________________________________________________________________________
10-Bit Voltage-Output DAC
in 8-Pin µMAX
MAX5304
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 8, V
DD
= +5V ±10%, V
REF
= +2.5V, R
L
= 5kΩ, 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.)
PARAMETER
DYNAMIC PERFORMANCE
DIGITAL INPUTS
Voltage Output Slew Rate
Output Settling Time
Output Voltage Swing
Current into FB
Start-Up Time
Digital Feedthrough
POWER SUPPLIES
Supply Voltage
Supply Current
Supply Current in Shutdown
Reference Current in Shutdown
TIMING CHARACTERISTICS
(Figure 6)
SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise Setup Time
SCLK Rise to
CS
Rise Hold Time
DIN Setup Time
DIN Hold Time
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold Time
CS
Pulse Width High
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
CS0
t
CS1
t
CSW
100
40
40
40
0
40
0
40
40
100
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
DD
I
DD
(Note 3)
(Note 3)
4.5
0.28
4
0.001
5.5
0.4
20
±0.5
V
mA
µA
µA
CS
= V
DD
, DIN = 100kHz
SR
To ±1/2LSB, V
STEP
= 2.5V
Rail-to-rail (Note 2)
0.6
10
0 to V
DD
0.001
20
5
±0.1
V/µs
µs
V
µA
µs
nVs
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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
.
_______________________________________________________________________________________
3
10-Bit Voltage-Output DAC
in 8-Pin µMAX
MAX5304
__________________________________________Typical Operating Characteristics
(V
DD
= +5V, R
L
= 5kΩ, C
L
= 100pF, T
A
= +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY
vs. REFERENCE VOLTAGE
MAX5304-01
REFERENCE VOLTAGE INPUT
FREQUENCY RESPONSE
MAX5304-02
SUPPLY CURRENT
vs. TEMPERATURE
380
360
SUPPLY CURRENT (µA)
340
320
300
280
260
240
220
R
L
=
∞
MAX5304-03
0.050
0
400
0.025
RELATIVE OUTPUT (dB)
INL (LSB)
-4
-8
0
-12
-0.025
-16
-0.050
0.4
1.2
2.0
2.8
3.6
4.4
REFERENCE VOLTAGE (V)
-20
0
500k
1M
1.5M
2M
2.5M
3M
FREQUENCY (Hz)
200
-60
-20
20
60
100
140
TEMPERATURE (°C)
POWER-DOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX5304-04
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5304-05
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
-55
-60
THD + NOISE (dB)
-65
-70
-75
-80
-85
-90
1
10
FREQUENCY (kHz)
100
V
REF
= +2.5V
DC
+ 1Vp-p SINE
CODE = FULL SCALE
MAX5304-06
10
POWER-DOWN SUPPLY CURRENT (µA)
9
8
500
450
400
SUPPLY CURRENT (µA)
350
300
250
200
150
100
50
0
-50
7
6
5
4
3
2
1
0
-60
-20
20
60
100
140
4.0
4.4
4.8
5.2
5.6
6.0
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
OUTPUT FFT PLOT
MAX5304-07
OUTPUT VOLTAGE
vs. LOAD
MAX5304-08
REFERENCE FEEDTHROUGH
AT 1kHz
REFERENCE INPUT SIGNAL
-20
SIGNAL AMPLITUDE (dB)
MAX5304-09a/09b
0
-20
SIGNAL AMPLITUDE (dB)
V
REF
= +3.6Vp-p
CODE = FULL SCALE
f
IN
= 1kHz
2.49980
2.49976
OUTPUT VOLTAGE (V)
2.49972
2.49968
2.49964
2.49960
2.49956
0.1k
0
-40
-40
-60
-60
OUTPUT FEEDTHROUGH
-80
-80
-100
0.5
1.6
2.7
3.8
4.9
6.0
FREQUENCY (kHz)
-100
1k
10k
LOAD (Ω)
100k
1M
0.5
1.6
2.7
3.8
4.9
6.0
FREQUENCY (kHz)
4
_______________________________________________________________________________________
10-Bit Voltage-Output DAC
in 8-Pin µMAX
____________________________Typical Operating Characteristics (continued)
(V
DD
= +5V, R
L
= 5kΩ, C
L
= 100pF, T
A
= +25°C, unless otherwise noted.)
MAX5304
MAJOR-CARRY TRANSITION
MAX5304-10a
DIGITAL FEEDTHROUGH (f
SCLK
= 100kHz)
MAX5304-11a
CS
5V/div
SCLK
2V/div
OUT
AC-COUPLED
100mV/div
OUT
AC-COUPLED
10mV/div
CODE = 512
10µs/div
CS = 5V
2µs/div
DYNAMIC RESPONSE
MAX5304-12a
OUT
1V/div
GND
10µs/div
GAIN = +2V/V, SWITCHING FROM CODE 0 TO 1005
_______________________________________________________________________________________
5
FPGA/CPLD
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