_______________General Description
The MAX531/MAX538/MAX539 are low-power, voltage-
output, 12-bit digital-to-analog converters (DACs) speci-
fied for single +5V power-supply operation. The MAX531
can also be operated with ±5V supplies. The
MAX538/MAX539 draw only 140µA, and the MAX531
(with internal reference) draws only 260µA. The
MAX538/MAX539 come in 8-pin DIP and SO packages,
while the MAX531 comes in 14-pin DIP and SO pack-
ages. All parts have been trimmed for offset voltage,
gain, and linearity, so no further adjustment is necessary.
The MAX538's buffer is fixed at a gain of +1 and the
MAX539's buffer at a gain of +2. The MAX531's internal
op amp may be configured for a gain of +1 or +2, as
well as for unipolar or bipolar output voltages. The
MAX531 can also be used as a four-quadrant multiplier
without external resistors or op amps.
For parallel data inputs, see the MAX530 data sheet.
_______________________Applications
Battery-Powered Test Instruments
Digital Offset and Gain Adjustment
Battery-Operated/Remote Industrial Controls
Machine and Motion Control Devices
Cellular Telephones
___________________________Features
o
Operate from Single +5V Supply
o
Buffered Voltage Output
o
Internal 2.048V Reference (MAX531)
o
140µA Supply Current (MAX538/MAX539)
o
INL = ±1/2LSB (max)
o
Guaranteed Monotonic over Temperature
o
Flexible Output Ranges:
0V to V
DD
(MAX531/MAX539)
V
SS
to V
DD
(MAX531)
0V to 2.6V (MAX531/MAX538)
o
8-Pin SO/DIP (MAX538/MAX539)
o
Power-On Reset
o
Serial Data Output for Daisy-Chaining
______________Ordering Information
MAX531/MAX538/MAX539
+5V, Low-Power, Voltage-Output,
Serial 12-Bit DACs
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
8
7
6
5
V
DD
VOUT
REFIN
AGND
DOUT
CS
SCLK
DIN
DIP/SO
TOP VIEW
MAX538
MAX539
_________________Pin Configurations
________________Functional Diagram
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
19-0172; Rev 6; 2/97
PART
TEMP. RANGE
PIN-PACKAGE
MAX531
ACPD
0°C to +70°C
14 Plastic DIP
MAX531BCPD
0°C to +70°C
14 Plastic DIP
MAX531ACSD
0°C to +70°C
14 SO
MAX531BCSD
0°C to +70°C
14 SO
ERROR
(LSB)
±1/2
±1
±1/2
±1
DAC
DAC REGISTER
(12 BITS)
SHIFT REGISTER
(12 BITS)
4
BITS
CONTROL
LOGIC
POWER-UP
RESET
2.048V
REFERENCE
(MAX531 ONLY)
AGND
SCLK
DIN
(MAX531 ONLY)
REFOUT
REFIN
(MAX531 ONLY)
BIPOFF
RFB
(MAX531
ONLY)
VOUT
V
DD
DGND
(MAX531
ONLY)
V
SS
(MAX531
ONLY)
DOUT
(LSB)
(MSB)
CLR
(MAX531
ONLY)
CS
MAX531
MAX538
MAX539
MAX531BC/D
0°C to +70°C
Dice*
±1
Ordering Information continued at end of data sheet.
*Dice are specified at T
A
= +25°C only.
Pin Configurations continued at end of data sheet.
MAX531/MAX538/MAX539
+5V, Low-Power, Voltage-Output
Serial 12-Bit DACs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
DD
to DGND and V
DD
to AGND ................................-0.3V, +6V
V
SS
to DGND and V
SS
to AGND .................................-6V, +0.3V
V
DD
to V
SS
.................................................................-0.3V, +12V
AGND to DGND........................................................-0.3V, +0.3V
Digital Input Voltage to DGND ......................-0.3V, (V
DD
+ 0.3V)
REFIN ..................................................(V
SS
- 0.3V), (V
DD
+ 0.3V)
REFOUT to AGND .........................................-0.3V, (V
DD
+ 0.3V)
RFB .....................................................(V
SS
- 0.3V), (V
DD
+ 0.3V)
BIPOFF ................................................(V
SS
- 0.3V), (V
DD
+ 0.3V)
V
OUT
(Note 1) ................................................................V
SS
, V
DD
Continuous Current, Any Pin................................-20mA, +20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)....727mW
8-Pin SO (derate 5.88mW/°C above +70°C) ................471mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)...800mW
14-Pin SO (derate 8.33mW/°C above +70°C) ..............667mW
Operating Temperature Ranges
MAX53_ _C_ _ .....................................................0°C to +70°C
MAX53_ _E_ _ ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°C
ELECTRICAL CHARACTERISTICS--Single +5V Supply
(V
DD
= +5V ±10%, V
SS
= 0V, AGND = DGND = 0V, REFIN = 2.048V (external), RFB = BIPOFF = VOUT (MAX531), C
REFOUT
= 33µF
(MAX531), R
L
= 10k
, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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.
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Unipolar Offset Error
V
OS
0
8
LSB
Differential Nonlinearity
DNL
±1
LSB
Relative Accuracy (Note 2)
INL
LSB
±1
Unipolar Offset Tempco
TCV
OS
3
ppm/°C
Gain Error (Note 2)
GE
±1
LSB
Resolution
N
12
Bits
±0.5
Gain-Error Tempco
1
ppm/°C
Power-Supply Rejection Ratio
(Note 3)
PSRR
0.4
1
LSB/V
0
V
DD
- 2
Output Voltage Range
0
V
DD
- 0.4
V
Output Load Regulation
1
LSB
Short-Circuit Current
I
SC
12
mA
Voltage Range
0
V
DD
- 2
V
Input Resistance
40
k
Input Capacitance
10
50
pF
AC Feedthrough
-80
dB
CONDITIONS
MAX53_ _C/E
Guaranteed monotonic
4.5V
V
DD
5.5V
MAX53_ _C/E
MAX531 (G = +1), MAX538
MAX531 (G = +2), MAX539
VOUT = 2V, R
L
= 2k
Code dependent, minimum at code 555 hex
Code dependent (Note 4)
REFIN = 1kHz, 2Vp-p
Note 1:
The output may be shorted to V
DD
, V
SS,
or AGND if the package power dissipation limit is not exceeded.
MAX53_AC/E
MAX53_BC/E
REFERENCE INPUT (REFIN)
VOLTAGE OUTPUT (VOUT)
STATIC PERFORMANCE
MAX531/MAX538/MAX539
+5V, Low-Power, Voltage-Output,
Serial 12-Bit DACs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V
DD
= +5V ±10%, V
SS
= 0V, AGND = DGND = 0V, REFIN = 2.048V (external), RFB = BIPOFF = VOUT (MAX531), C
REFOUT
= 33µF
(MAX531), R
L
= 10k
, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
Input Current
SYMBOL
MIN
TYP
MAX
I
IN
±1
UNITS
Noise Voltage
e
n
µA
400
Input Capacitance
C
IN
µVp-p
Power-Supply Rejection Ratio
8
PSRR
300
µV/V
Resistance
R
REFOUT
0.5
2
pF
Temperature Coefficient
TC
REFOUT
30
50
ppm/°C
Minimum Required External
Capacitor
C
MIN
3.3
µF
Output High
Input High
V
OH
V
IH
2.4
V
DD
- 1
V
Input Low
V
V
IL
0.8
V
Output Low
V
OL
0.4
V
Voltage-Output Slew Rate
SR
0.15
0.25
V/µs
Voltage-Output Settling Time
25
µs
Digital Feedthrough
2.024
2.048
2.072
5
nV-s
Signal-to-Noise plus Distortion
SINAD
68
dB
260
400
CONDITIONS
V
IN
= 0V or V
DD
0.1Hz to 10kHz
4.5V
V
DD
5.5V
(Note 5)
MAX531AC/AE/AM/BM
I
SOURCE
= 2mA
I
SINK
= 2mA
T
A
= +25°C
To ±1/2LSB, VOUT = 2V
CS = V
DD
, DIN = 100kHz
REFIN = 1kHz, 2Vp-p (G = +1 or +2),
code = FFF hex
Power-Supply Current
I
DD
All inputs = 0V or V
DD
,
output = no load
140
300
µA
CS Setup Time
t
CSS
20
ns
SCLK Fall to
CS Fall Hold Time
t
CSH0
15
ns
SCLK Fall to
CS Rise Hold Time
t
CSH1
0
ns
SCLK High Width
t
CH
35
ns
SCLK Low Width
t
CL
35
ns
DIN Setup Time
t
DS
45
ns
DIN Hold Time
t
DH
0
ns
DOUT Valid Propagation Delay
t
DO
C
L
= 50pF
80
ns
CS High Pulse Width
t
CSW
20
ns
CLR Pulse Width
t
CLR
25
ns
MAX531BC/BE
MAX531
MAX538, MAX539
30
2.017
2.079
Reference Output Voltage
V
2.013
2.083
V
DD
= 5.0V
CS Rise to SCLK Rise Setup Time
t
CS1
50
ns
T
A
= +25°C
MAX531BC
MAX531BE
Positive Supply Voltage
V
DD
4.5
5.5
V
REFERENCE OUTPUT (REFOUT--MAX531 only)
DIGITAL INPUTS (DIN, SCLK,
CS
,
CLR
)
DIGITAL OUTPUT (DOUT)
DYNAMIC PERFORMANCE
POWER SUPPLY
SWITCHING CHARACTERISTICS
MAX531/MAX538/MAX539
+5V, Low-Power, Voltage-Output,
Serial 12-Bit DACs
4
_______________________________________________________________________________________
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Bipolar Offset Error
V
OS
±8
Gain Error (Unipolar or Bipolar)
GEU
LSB
Differential Nonlinearity
±1
DNL
±1
LSB
Relative Accuracy
INL
LSB
LSB
±1
Gain-Error Tempco
Bipolar Offset Tempco
TCV
OS
3
ppm/°C
1
ppm/°C
Power-Supply Rejection Ratio
(Note 3)
PSRR
0.4
1
LSB/V
Voltage Range
Resolution
V
SS
+ 2
V
DD
- 2
N
12
V
Input Resistance
Bits
40
k
Input Capacitance
±0.5
10
50
pF
AC Feedthrough
-80
dB
CONDITIONS
BIPOFF = REFIN, MAX531_C/E
MAX531_C/E
Guaranteed monotonic
Tested at V
DD
= 5V,
V
SS
= -5V
BIPOFF = REFIN
4.5V
V
DD
5.5V, -5.5V
V
SS
-4.5V
Code dependent, minimum at code 555 hex
Code dependent (Note 4)
REFIN = 1kHz, 2.0Vp-p
ELECTRICAL CHARACTERISTICS--Dual Supplies (MAX531 Only)
(V
DD
= +5V ±10%, V
SS
= -5V ±10%, AGND = DGND = 0V, REFIN = 2.048V (external), RFB = BIPOFF = VOUT, C
REFOUT
= 33µF,
R
L
= 10k
, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
MAX531AC/E
MAX531BC/E
2.024
2.048
2.072
MAX531AC/AE/AM/BM
30
50
Temperature Coefficient
TC
REFOUT
MAX531BC/BE
30
ppm/°C
Resistance
R
REFOUT
(Note 5)
0.5
2
Power-Supply Rejection Ratio
PSRR
4.5V
V
DD
5.5V
300
µV/V
e
n
0.1Hz to 10kHz
400
µVp-p
Noise Voltage
Minimum Required External
Capacitor
C
MIN
3.3
µF
Input High
V
IH
2.4
V
Input Low
V
IL
0.8
V
Input Current
I
IN
V
IN
= 0V or V
DD
±1
µA
Input Capacitance
C
IN
8
pF
Output High
V
OH
I
SOURCE
= 2mA
V
DD
- 1
V
Output Low
V
OL
I
SINK
= 2mA
0.4
V
2.017
2.079
V
DD
= 5.0V
2.013
2.083
V
Reference Output Voltage
T
A
= +25°C
MAX531BC
MAX531BE
REFERENCE INPUT (REFIN)
REFERENCE OUTPUT (REFOUT--MAX531 only)
DIGITAL INPUTS (DIN, SCLK,
CS
)
DIGITAL OUTPUT (DOUT)
MAX531/MAX538/MAX539
+5V, Low-Power, Voltage-Output,
Serial 12-Bit DACs
_______________________________________________________________________________________
5
Note 2:
In single-supply operation, INL and GE calculated from code 11 to code 4095. Tested at V
DD
= +5V.
Note 3:
This specification applies to both gain-error power-supply rejection ratio and offset-error power-supply rejection ratio.
Note 4:
Guaranteed by design.
Note 5:
Tested at I
OUT
= 100µA. The reference can typically source up to 5mA (see
Typical Operating Characteristics).
ELECTRICAL CHARACTERISTICS--Dual Supplies (MAX531 Only) (continued)
(V
DD
= +5V ±10%, V
SS
= -5V ±10%, AGND = DGND = 0V, REFIN = 2.048V (external), RFB = BIPOFF = VOUT, C
REFOUT
= 33µF,
R
L
= 10k
, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Voltage-Output Slew Rate
SR
dB
0.15
0.25
V
DD
V/µs
4.5
5.5
I
SC
12
V
mA
Positive Supply Voltage
1
LSB
Negative Supply Voltage
Voltage-Output Settling Time
25
µs
Signal-to-Noise plus Distortion
5
nV-s
V
SS
-5.5
0
V
Short-Circuit Current
68
Digital Feedthrough
SINAD
68
Output Load Regulation
V
SS
+ 2
V
DD
- 2
Output Voltage Range
V
SS
+ 0.4
V
DD
- 0.4
V
CONDITIONS
VOUT = 2V, R
L
= 2k
To ±1/2LSB, VOUT = 2V
Step 000 hex to FFF hex
REFIN = 1kHz, 2Vp-p, (G = +1)
REFIN = 1kHz, 2Vp-p, (G = +2)
MAX531 (G = +1)
MAX531 (G = +2)
CS Setup Time
t
CSS
20
ns
SCLK Fall to
CS Fall Hold Time
t
CSH0
15
ns
SCLK Fall to
CS Rise Hold Time
t
CSH1
0
ns
SCLK High Width
t
CH
35
ns
SCLK Low Width
t
CL
35
ns
DIN Setup Time
t
DS
45
ns
DIN Hold Time
t
DH
0
ns
DOUT Valid Propagation Delay
t
DO
C
L
= 50pF
80
ns
CS High Pulse Width
t
CSW
20
ns
CLR Pulse Width
t
CLR
25
ns
CS Rise to SCLK Rise Setup Time
t
CS1
50
ns
Positive Supply Current
I
DD
260
400
µA
All inputs = 0V or V
DD
, no load
Negative Supply Current
I
SS
-120
-200
µA
All inputs = 0V or V
DD
, no load
VOLTAGE OUTPUT (VOUT)
DYNAMIC PERFORMANCE
POWER SUPPLY
SWITCHING CHARACTERISTICS
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