19-1317; Rev 1; 12/97
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Configurable Outputs
_______________General Description
The MAX5156/MAX5157 low-power, serial, voltage-out-
put, dual 12-bit digital-to-analog converters (DACs)
consume only 500µA from a single +5V (MAX5156) or
+3V (MAX5157) supply. These devices feature Rail-to-
Rail
®
output swing and are available in space-saving
16-pin QSOP and DIP packages. Access to the invert-
ing input allows for specific gain configurations, remote
sensing, and high output current capability, making
these devices ideally suited for industrial process con-
trols. These devices are also well suited for digitally
programmable (4–20mA) current loops.
The 3-wire serial interface is SPI™/QSPI™ and
Microwire™ compatible. Each DAC has a double-
buffered input organized as an input register followed
by a DAC register, which allows the input and DAC reg-
isters to be updated independently or simultaneously.
Additional features include a programmable shutdown
(2µA), hardware-shutdown lockout, a separate voltage
reference for each DAC, power-on reset, and an active-
low clear input (CL) that resets all registers and DACs to
zero. The MAX5156/MAX5157 provide a programmable
logic output pin for added functionality, and a serial-
data output pin for daisy chaining.
____________________________Features
o
12-Bit Dual DAC with Configurable Output
Amplifier
o
Single-Supply Operation: +5V (MAX5156)
+3V (MAX5157)
o
Rail-to-Rail Output Swing
o
Low Quiescent Current: 500µA (normal operation)
2µA (shutdown mode)
o
Power-On Reset Clears DAC Outputs to Zero
o
SPI/QSPI and Microwire Compatible
o
Space-Saving 16-Pin QSOP Package
MAX5156/MAX5157
_______________Ordering Information
PART
MAX5156ACPE
MAX5156BCPE
MAX5156ACEE
MAX5156BCEE
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
16 Plastic DIP
16 Plastic DIP
16 QSOP
16 QSOP
INL
(LSB)
±1/2
±1
±1/2
±1
________________________Applications
Industrial Process Control
Digital Offset and Gain
Adjustment
Remote Industrial Controls
Motion Control
Digitally Programmable
4–20mA Current Loops
Automatic Test Equipment
Ordering Information continued at end of data sheet.
Pin Configuration appears at end of data sheet.
_________________________________________________________Functional Diagram
DOUT
CL
PDL
DGND
AGND
V
DD
REFA
DECODE
CONTROL
16-BIT
SHIFT
REGISTER
LOGIC
OUTPUT
SR
CONTROL
INPUT
REG A
DAC
REG A
DAC A
OUTA
MAX5156
MAX5157
INPUT
REG B
DAC
REG B
DAC B
FBA
OUTB
FBB
CS
DIN
SCLK UPO
REFB
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. 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 408-737-7600 ext. 3468.
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Configurable Outputs
MAX5156/MAX5157
ABSOLUTE MAXIMUM RATINGS
V
DD
to AGND............................................................-0.3V to +6V
V
DD
to DGND ...........................................................-0.3V to +6V
AGND to DGND ..................................................................±0.3V
FBA, FBB to AGND.....................................-0.3V to (V
DD
+ 0.3V)
REF_, OUT_ to AGND.................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs (SCLK, DIN,
CS, CL, PDL)
to DGND ................................................................-0.3V to +6V
Digital Outputs (DOUT, UPO) to DGND .....-0.3V to (V
DD
+ 0.3V)
Maximum Current into Any Pin .........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 10.5mW/°C above +70°C) .............593mW
QSOP (derate 8.30mW/°C above +70°C) .....................667mW
CERDIP (derate 10.00mW/°C above +70°C) ................800mW
Operating Temperature Ranges
MAX5152_C_E/MAX5153_C_E ...........................0°C to +70°C
MAX5152_E_E/MAX5153_E_E..........................-40°C to +85°C
MAX5152_MJE/MAX5153_MJE ......................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+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—MAX5156
(V
DD
= +5V ±10%, V
REFA
= V
REFB
= 2.5V, R
L
= 10kΩ, 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 (Figure 9).)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Tempco
Gain Error
Gain-Error Tempco
V
DD
Power-Supply Rejection Ratio
REFERENCE INPUT
Reference Input Range
Reference Input Resistance
REF
R
REF
Minimum with code 1554 hex
Input code = 1FFE hex,
V
REF
= 0.67Vp-p at 2.5V
DC
Input code = 0000 hex,
V
REF
= (V
DD
- 1.4Vp-p) at 1kHz
SINAD
Input code = 1FFE hex,
V
REF
= 1Vp-p at 2.5V
DC
, f = 25kHz
CL, PDL, CS,
DIN, SCLK
CL, PDL, CS,
DIN, SCLK
200
V
IN
= 0V to V
DD
0.001
8
±1
3
0.8
0
14
20
V
DD
- 1.4
V
kΩ
PSRR
Normalized to 2.5V
4.5V
≤
V
DD
≤
5.5V
N
INL
DNL
V
OS
TCV
OS
(Note 1)
Guaranteed monotonic
Code = 10
Normalized to 2.5V
3
-0.5
3
20
200
±3
MAX5156A
MAX5156B
12
±1/2
±1
±1
±6
Bits
LSB
LSB
mV
ppm/°C
LSB
ppm/°C
µV/V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MULTIPLYING-MODE PERFORMANCE
Reference 3dB Bandwidth
Reference Feedthrough
Signal-to-Noise plus
Distortion Ratio
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
V
IH
V
IL
V
HYS
I
IN
C
IN
V
V
mV
µA
pF
600
-85
82
kHz
dB
dB
2
_______________________________________________________________________________________
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Configurable Outputs
ELECTRICAL CHARACTERISTICS—MAX5156 (continued)
(V
DD
= +5V ±10%, V
REFA
= V
REFB
= 2.5V, R
L
= 10kΩ, 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 (Figure 9).)
PARAMETER
Output High Voltage
Output Low Voltage
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Output Settling Time
Output Voltage Swing
Current into FBA or FBB
Time Required to Exit Shutdown
Digital Feedthrough
Digital Crosstalk
POWER SUPPLIES
Positive Supply Voltage
Power-Supply Current
Power-Supply Current in
Shutdown
Reference Current in Shutdown
TIMING CHARACTERISTICS
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
SCLK Fall to DOUT Valid
Propagation Delay
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold
CS
Pulse Width High
Note 1:
Note 2:
Note 3:
Note 4:
t
CP
t
CH
t
CL
t
CSS
t
CHS
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
t
CSW
C
LOAD
= 200pF
C
LOAD
= 200pF
10
40
100
(Note 4)
100
40
40
40
0
40
0
80
80
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
DD
I
DD
(Note 3)
4.5
0.5
2
0
5.5
0.65
10
±1
V
mA
µA
µA
CS
= V
DD
, f
DIN
= 100kHz, V
SCLK
= 5Vp-p
I
FB
SR
To 1/2LSB of full-scale, V
STEP
= 2.5V
Rail-to-rail (Note 2)
0.75
15
0 to V
DD
0
25
5
5
±0.1
V/µs
µs
V
µA
µs
nV-s
nV-s
SYMBOL
V
OH
V
OL
CONDITIONS
I
SOURCE
= 2mA
I
SINK
= 2mA
MIN
V
DD
- 0.5
0.13
0.40
TYP
MAX
UNITS
V
V
MAX5156/MAX5157
DIGITAL OUTPUTS (DOUT, UPO)
I
DD(SHDN)
(Note 3)
Accuracy is specified from code 10 to code 4095.
Accuracy is better than 1LSB for V
OUT
greater than 6mV and less than V
DD
- 50mV. Guaranteed by PSRR test at the end points.
Digital inputs are set to either V
DD
or DGND, code = 0000 hex, R
L
=
∞.
SCLK minimum clock period includes rise and fall times.
_______________________________________________________________________________________
3
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Configurable Outputs
MAX5156/MAX5157
ELECTRICAL CHARACTERISTICS—MAX5157
(V
DD
= +2.7V to +3.6V, V
REFA
= V
REFB
= 1.25V, R
L
= 10kΩ, 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 (Figure 9).)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Tempco
Gain Error
Gain-Error Tempco
V
DD
Power-Supply Rejection Ratio
REFERENCE INPUT (V
REF
)
Reference Input Range
Reference Input Resistance
REF
R
REF
Minimum with code 1554 hex
Input code = 1FFE hex,
V
REF(AC)
= 0.67Vp-p at 1.25V
DC
Input code = 0000 hex,
V
REF
= (V
DD
- 1.4V) at 1kHz
SINAD
Input code = 1FFE hex,
V
REF
= 1Vp-p at 1.25V
DC
, f = 15kHz
CL, PDL, CS,
DIN, SCLK
CL, PDL, CS,
DIN, SCLK
200
V
IN
= 0V to V
DD
0
8
I
SOURCE
= 2mA
I
SINK
= 2mA
V
DD
- 0.5
0.13
0.75
To 1/2LSB of full-scale, V
STEP
= 1.25V
Rail-to-rail (Note 6)
I
FB
CS
= V
DD
, f
DIN
= 100kHz, V
SCLK
= 3Vp-p
18
0 to V
DD
0
25
5
5
±0.1
0.4
±0.1
2.2
0.8
0
14
20
V
DD
- 1.4
V
kΩ
PSRR
Normalized to 1.25V
2.7V
≤
V
DD
≤
3.6V
N
INL
DNL
V
OS
TCV
OS
(Note 5)
Guaranteed monotonic
Code = 20
Normalized to 1.25V
6
-0.5
6
20
320
±4
MAX5157A
MAX5157B
12
±1
±2
±1
±6
Bits
LSB
LSB
mV
ppm/°C
LSB
ppm/°C
µV/V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MULTIPLYING-MODE PERFORMANCE
Reference 3dB Bandwidth
Reference Feedthrough
Signal-to-Noise plus Distortion
Ratio
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS (DOUT, UPO)
Output High Voltage
Output Low Voltage
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Output Settling Time
Output Voltage Swing
Current into FBA or FBB
Time Required to Exit Shutdown
Digital Feedthrough
Digital Crosstalk
SR
V/µs
µs
V
µA
µs
nV-s
nV-s
V
OH
V
OL
V
V
V
IH
V
IL
V
HYS
I
IN
C
IN
V
V
mV
µA
pF
600
-92
73
kHz
dB
dB
4
_______________________________________________________________________________________
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Configurable Outputs
ELECTRICAL CHARACTERISTICS—MAX5157 (continued)
(V
DD
= +2.7V to +3.6V, V
REFA
= V
REFB
= 1.25V, R
L
= 10kΩ, 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 (Figure 9).)
PARAMETER
POWER SUPPLIES
Positive Supply Voltage
Power-Supply Current
Power-Supply Current in
Shutdown
Reference Current in
Shutdown
TIMING CHARACTERISTICS
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
SCLK Fall to DOUT Valid
Propagation Delay
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold
CS
Pulse Width High
t
CP
t
CH
t
CL
t
CSS
t
CHS
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
t
CSW
C
LOAD
= 200pF
C
LOAD
= 200pF
10
40
100
(Note 4)
100
40
40
40
0
50
0
120
120
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
DD
I
DD
(Note 7)
2.7
0.5
1
3.6
0.6
8
±1
V
mA
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5156/MAX5157
I
DD(SHDN)
(Note 7)
Note 5:
Accuracy is specified from code 20 to code 4095.
Note 6:
Accuracy is better than 1LSB for V
OUT
greater than 6mV and less than V
DD
- 100mV. Guaranteed by PSRR test at the end
points.
Note 7:
Digital inputs are set to either V
DD
or DGND, code = 0000 hex, R
L
=
∞.
_______________________________________________________________________________________
5
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