19-2332; Rev 1; 9/03
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
General Description
The MAX5230/MAX5231 low-power, dual 12-bit voltage-
output digital-to-analog converters (DACs) feature an
internal 3ppm/°C precision bandgap voltage reference
and precision output amplifiers. The MAX5231 operates
on a single 5V supply with an internal 2.5V reference and
features a 4.095V full-scale output range. The MAX5230
operates on a single 3V supply with an internal 1.25V ref-
erence and features a 2.0475V full-scale output range.
The MAX5231 consumes only 470µA while the MAX5230
consumes only 420µA of supply current. Both devices
feature low-power (2µA) software- and hardware-
enabled shutdown modes.
The MAX5230/MAX5231 feature a 13.5MHz SPI™-,
QSPI™-, and MICROWIRE™-compatible 3-wire serial
interface. An additional data output (DOUT) allows for
daisy-chaining and read back. Each DAC has a double-
buffered digital input. The MAX5230/MAX5231 feature
two software-selectable shutdown output impedances:
1kΩ or 200kΩ. A power-up reset feature sets DAC out-
puts at ground or at the midscale DAC code.
The MAX5230/MAX5231 are specified over the extended
temperature range (-40°C to +85°C) and are available in
16-pin QSOP packages.
Features
o
Internal 3ppm/°C Precision Bandgap Reference
2.465V (MAX5231)
1.234V (MAX5230)
o
10ppm/°C (max) Full-Scale Output Range
4.095V (MAX5231)
2.0475V (MAX5230)
o
Single-Supply Operation
5V (MAX5231)
3V (MAX5230)
o
Low Supply Current
470µA (MAX5231)
420µA (MAX5230)
o
13.5MHz SPI/QSPI/MICROWIRE-Compatible,
3-Wire Serial Interface
o
Pin-Programmable Power-Up Reset State to Zero
or Midscale Output Voltage
o
Programmable Shutdown Modes with 1kΩ or
200kΩ Internal Output Loads
o
Recalls Output State Prior to Shutdown or Reset
o
Buffered Output Drives 5kΩ || 100pF Loads
o
Space-Saving 16-Pin QSOP Package
MAX5230/MAX5231
Applications
Industrial Process Controls
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
µP-Controlled Systems
Ordering Information
PART
MAX5230AEEE
MAX5230BEEE
MAX5231AEEE
MAX5231BEEE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
16 QSOP
16 QSOP
16 QSOP
16 QSOP
INL
(LSB)
±0.5
±1
±0.5
±1
Pin Configuration
TOP VIEW
OSA 1
OUTA 2
RSTV 3
LDAC 4
CLR 5
CS 6
DIN 7
SCLK 8
16 OSB
15 OUTB
14 V
DD
Functional Diagram appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
MAX5230
MAX5231
13 AGND
12 REF
11 PDL
10 DOUT
9
DGND
QSOP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
MAX5230/MAX5231
ABSOLUTE MAXIMUM RATINGS
V
DD
to AGND, DGND ...............................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
Digital Inputs to DGND.............................................-0.3V to +6V
Digital Output (DOUT) to DGND...................-0.3V to V
DD
+ 0.3V
OUT_ to AGND .............................................-0.3V to V
DD
+ 0.3V
OS_ to AGND...................................................-4V to V
DD
+ 0.3V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range ...........................-40°C to +85°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—MAX5231
(V
DD
= +4.5V to +5.5V, OS_ = AGND = DGND = 0, R
L
= 5kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Nonlinearity (Note 1)
Differential Nonlinearity
Offset Error (Note 2)
Offset-Temperature Coefficient (Note 3)
Full-Scale Voltage
Full-Scale Temperature Coefficient
(Note 3)
Power-Supply Rejection
DC Crosstalk (Note 4)
REFERENCE
Output Voltage
Output-Voltage Temperature
Coefficient (Note 3)
Reference External Load Regulation
Reference Short-Circuit Current
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS
Output High Voltage
Output Low Voltage
DYNAMIC PERFORMANCE
Voltage-Output Slew Rate
SR
0.6
V/µs
V
OH
V
OL
I
SOURCE
= 2mA
I
SINK
= 2mA
4.25
0.2
V
V
V
IH
V
IL
V
HYS
I
IN
C
IN
Digital inputs = 0 or V
DD
8
200
±1
0.7 x V
DD
0.3 x V
DD
V
V
mV
µA
pF
V
REF
TCV
REF
V
OUT
/I
OUT
MAX5231A
MAX5231B
0
≤
I
OUT
≤
100µA (sourcing)
2.465
3
10
0.1
4
2
V
ppm/°C
µV/µA
mA
N
INL
DNL
V
OS
TCV
OS
V
FS
TCV
FS
PSR
Code = FFF hex, T
A
= +25°C
MAX5231A
MAX5231B (Note 6)
4.5V
≤
V
DD
≤
5.5V
4.070
8
4.095
3
10
175
4.120
10
30
500
100
MAX5231A
MAX5231B
12
±0.5
±1
±1
±3
Bits
LSB
LSB
mV
µV/°C
V
ppm/°C
µV
µV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
MAX5230/MAX5231
ELECTRICAL CHARACTERISTICS—MAX5231 (continued)
(V
DD
= +4.5V to +5.5V, OS_ = AGND = DGND = 0, R
L
= 5kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
Voltage-Output Settling Time
Output-Voltage Swing (Note 5)
OS_ Input Resistance
Time Required for Output to Settle After
Turning on V
DD
(Note 6)
Time Required for Output to Settle After
Exiting Full Power-Down (Note 6)
Time Required for Output to Settle After
Exiting DAC Power-Down (Note 6)
Digital Feedthrough
Major-Carry Glitch Energy
POWER SUPPLIES
Power-Supply Voltage
Power-Supply Current (Note 7)
Power-Supply Current in Power-Down
and Shutdown Modes (Note 7)
V
DD
I
DD
Full power-down mode
One DAC shutdown mode
Both DACs shutdown mode
4.5
470
1.4
350
235
5.5
525
5
390
260
µA
V
µA
CS
= V
DD
, f
SCLK
= 100kHz,
V
SCLK
= 5V
P-P
R
OS
83
SYMBOL
CONDITIONS
To
±0.5LSB,
V
STEP
= ±4V
(V
DD
- 0.25V)
≥
V
OUT
≥
0.25V
MIN
TYP
10
0 to V
DD
121
95
95
12
5
90
400
400
160
MAX
UNITS
µs
V
kΩ
µs
µs
µs
nV-s
nV-s
ELECTRICAL CHARACTERISTICS—MAX5230
(V
DD
= +2.7V to +3.6V, OS_ = AGND = DGND = 0, R
L
= 5kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
Resolution
Integral Nonlinearity (Note 1)
Differential Nonlinearity
Offset Error (Note 2)
Offset-Temperature Coefficient (Note 3)
Full-Scale Voltage
Full-Scale Temperature Coefficient
(Note 3)
Power-Supply Rejection
DC Crosstalk (Note 4)
REFERENCE
Output Voltage
Output-Voltage Temperature
Coefficient (Note 3)
V
REF
TCV
REF
MAX5230A
MAX5230B
1.234
3
10
V
ppm/°C
SYMBOL
N
INL
DNL
V
OS
TCV
OS
V
FS
TCV
FS
PSR
Code = FFF hex, T
A
= +25°C
MAX5230A
MAX5230B (Note 6)
2.7V
≤
V
DD
≤
3.6V
2.0350
8
2.0475
3
10
175
2.0600
10
30
500
100
MAX5230A
MAX5230B
CONDITIONS
MIN
12
±0.5
±1
±1
±3
TYP
MAX
UNITS
Bits
LSB
LSB
mV
µV/°C
V
ppm/°C
µV
µV
_______________________________________________________________________________________
3
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
MAX5230/MAX5231
ELECTRICAL CHARACTERISTICS—MAX5230 (continued)
(V
DD
= +2.7V to +3.6V, OS_ = AGND = DGND = 0, R
L
= 5kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
Reference External Load Regulation
Reference Short-Circuit Current
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS
Output High Voltage
Output Low Voltage
DYNAMIC PERFORMANCE
Voltage-Output Slew Rate
Voltage-Output Settling Time
Output-Voltage Swing (Note 5)
OS_ Input Resistance
Time Required for Output to Settle After
Turning on V
DD
(Note 6)
Time Required for Output to Settle After
Exiting Full Power-Down (Note 6)
Time Required for Output to Settle After
Exiting DAC Power-Down (Note 6)
Digital Feedthrough
Major-Carry Glitch Energy
CS
=V
DD
, f
SCLK
= 100kHz,
V
SCLK
= 3V
P-P
R
OS
83
SR
To
±0.5
LSB, V
STEP
= ±2V
(V
DD
- 0.25V)
≥
V
OUT
≥
0.25V
0.6
10
0 to V
DD
121
95
95
12
5
90
400
400
160
V/µs
µs
V
kΩ
µs
µs
µs
nV-s
nV-s
V
OH
V
OL
I
SOURCE
= 2mA
I
SINK
= 2mA
2.3
0.25
V
V
V
IH
V
IL
V
HYS
I
IN
C
IN
Digital inputs = 0 or V
DD
8
200
±1
0.7 x V
DD
0.3 x V
DD
V
V
mV
µA
pF
SYMBOL
CONDITIONS
MIN
TYP
0.1
4
MAX
2
UNITS
µV/µA
mA
V
OUT
/I
OUT
0
≤
I
OUT
≤
100µA (sourcing)
4
_______________________________________________________________________________________
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
ELECTRICAL CHARACTERISTICS—MAX5230 (continued)
(V
DD
= +2.7V to +3.6V, OS_ = AGND = DGND = 0, R
L
= 5kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
PARAMETER
POWER SUPPLIES
Power-Supply Voltage
Power-Supply Current (Note 7)
Power-Supply Current in Power-Down
and Shutdown Modes (Note 7)
V
DD
I
DD
Full power-down mode
One DAC shutdown mode
Both DACs shutdown mode
2.7
420
0.9
320
220
3.6
475
5
360
245
µA
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5230/MAX5231
Note 1:
Accuracy is guaranteed as shown in the following table:
V
DD
(V)
3
5
ACCURACY GUARANTEED
FROM CODE
20
10
TO CODE
4095
4095
Note 2:
Offset is measured at the code closest to 10mV.
Note 3:
Temperature coefficient is determined by the box method in which the maximum
∆V
OUT
over the temperature range is
divided by
∆T.
Note 4:
DC crosstalk is measured as follows: set DAC A to midscale, and DAC B to zero, and measure DAC A output; then change
DAC B to full scale, and measure
∆V
OUT
for DAC A. Repeat the same measurement with DAC A and DAC B interchanged.
DC crosstalk is the maximum
∆V
OUT
measured.
Note 5:
Accuracy is better than 1LSB for V
OUT_
= 10mV to V
DD
- 180mV.
Note 6:
Guaranteed by design, not production tested.
Note 7:
R
LOAD
=
∞
and digital inputs are at either V
DD
or DGND.
TIMING CHARACTERISTICS—MAX5231
(V
DD
= +4.5V to +5.5V, AGND = DGND = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Figures 1 and 2)
PARAMETER
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 DOUT Valid
Propagation Delay Time
SCLK Fall to DOUT Valid
Propagation Delay Time
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold Time
CS
Pulse Width High
LDAC
Pulse Width Low
CS
Rise to
LDAC
Rise Hold Time
SYMBOL
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
t
CSW
t
LDL
t
CSLD
(Note 8)
C
LOAD
= 200pF
C
LOAD
= 100pF
C
LOAD
= 200pF
C
LOAD
= 100pF
10
30
75
30
40
CONDITIONS
MIN
74
30
30
30
0
30
0
45
30
45
30
100
100
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
_______________________________________________________________________________________
5
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