19-2122; Rev 2; 7/03
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
General Description
The MAX5742 quad, 12-bit, low-power, buffered volt-
age-output, digital-to-analog converter (DAC) is pack-
aged in a space-saving 10-pin µMAX package (5mm
✕
3mm). The wide supply voltage range of +2.7V to
+5.5V and 229µA supply current accommodates low-
power and low-voltage applications. DAC outputs
employ on-chip precision output amplifiers that swing
Rail-to-Rail
®
. The MAX5742’s reference input accepts a
voltage range from 0 to V
DD
. In power-down the refer-
ence input is high impedance, further reducing the sys-
tem’s total power consumption.
The 20MHz, 3-wire SPI™, QSPI™, MICROWIRE™ and
DSP-compatible serial interface saves board space
and reduces the complexity of opto- and transformer-
isolated applications. The MAX5742 on-chip power-on
reset (POR) circuit resets the DAC outputs to zero and
loads the output with a 100kΩ resistor to ground. This
provides additional safety for applications that drive
valves or other transducers that need to be off on
power-up. The MAX5742’s software-controlled power-
down reduces supply current to less than 0.3µA and
provides software-selectable output loads (1kΩ, 100kΩ,
or high impedance) while in power-down. The MAX5742
is specified over the -40°C to +125°C automotive tem-
perature range.
o
Ultra-Low Power Consumption
229µA at V
DD
= +3.6V
271µA at V
DD
= +5.5V
o
Wide +2.7V to +5.5V Single-Supply Range
o
10-Pin µMAX Package
o
0.3µA Power-Down Current
o
Guaranteed 12-Bit Monotonicity (±1LSB DNL)
o
Safe Power-Up Reset to Zero Volts at DAC Output
o
Three Software-Selectable Power-Down
Impedances (100kΩ, 1kΩ, Hi-Z)
o
Fast 20MHz 3-Wire SPI, QSPI, and MICROWIRE-
Compatible Serial Interface
o
Rail-to-Rail Output Buffer Amplifiers
o
Schmitt-Triggered Logic Inputs for Direct
Interfacing to Optocouplers
o
Wide -40°C to +125°C Operating Temperature
Range
Features
MAX5742
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
PART
MAX5742EUB
MAX5742AUB
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +125°C
PIN-PACKAGE
10 µMAX
10 µMAX
Pin Configuration
TOP VIEW
CS 1
SCLK
2
3
4
5
10 OUTD
9
OUTC
OUTB
OUTA
REF
Functional Diagram appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
V
DD
GND
DIN
MAX5742
8
7
6
µMAX
________________________________________________________________
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.
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
MAX5742
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ..............................................................-0.3V to +6V
OUT_, SCLK, DIN,
CS,
REF to GND...............-0.3 to (V
DD
+0.3V)
Maximum Continuous Current Into Any Pin......................±50mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 6.9 mW/°C above +70°C) ..........555mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature.......................................-65°C to +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
(V
DD
= +2.7V to +5.5V, GND = 0, V
REF
= V
DD
, R
L
= 5kΩ, C
L
= 200pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
V
DD
= +5V, T
A
= +25°C.)
PARAMETER
STATIC ACCURACY
(Note 1)
Resolution
Integral Nonlinearity Error
Differential Nonlinearity Error
Zero-Code Error
Zero-Code Error Tempco
Gain Error
Gain-Error Tempco
Power-Supply Rejection Ratio
REFERENCE INPUT
Reference Input Voltage Range
Reference Input Impedance
Power-Down Reference Current
DAC OUTPUT
Output Voltage Range
DC Output Impedance
Short-Circuit Current
Wake-Up Time
Output Leakage Current
No load (Note 4)
Code = 800 hex
V
DD
= +3V
V
DD
= +5V
V
DD
= +3V
V
DD
= +5V
Power-down mode = output high
impedance
0
0.8
15
48
8
8
±18
V
DD
V
Ω
mA
µs
nA
V
REF
R
REF
In operation
In power-down mode
In power-down mode (Note 3)
0
32
45
2
1
10
V
DD
63
V
kΩ
MΩ
µA
PSRR
Code = FFF hex,
∆V
DD
=
±10%
GE
Code = FFF hex
0.26
58.8
N
INL
DNL
OE
(Note 2)
Guaranteed monotonic (Note 2)
Code = 000
0.4
2.3
±3
12
±2
±16
±1
1.5
Bits
LSB
LSB
% of FS
ppm/°C
% of FS
ppm/°C
dB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, GND = 0, V
REF
= V
DD
, R
L
= 5kΩ, C
L
= 200pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
V
DD
= +5V, T
A
= +25°C.)
PARAMETER
DIGITAL INPUTS (SCLK, DIN,
CS)
Input High Voltage
Input Low Voltage
Input Leakage Current
Input Capacitance
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Voltage Output Settling Time
Digital Feedthrough
Digital-Analog Glitch Impulse
DAC-to-DAC Crosstalk
POWER REQUIREMENTS
Supply-Voltage Range
Supply Current with No Load
Power-Down Supply Current
V
DD
I
DD
I
DDPD
All digital inputs at 0 or V
DD
= 3.6V
All digital inputs at 0 or V
DD
= 5.5V
All digital inputs at 0 or V
DD
= 5.5V
2.7
229
271
0.29
5.5
395
420
1
V
µA
µA
SR
400 hex to C00 hex (Note 5)
Any digital inputs from 0 to V
DD
Major carry transition (code 7FF hex to code
800 hex)
0.5
4
0.1
12
2.4
10
V/µs
µs
nV-s
nV-s
nV-s
V
IH
V
IL
I
IN
C
IN
V
DD
= +3V, +5V
V
DD
= +3V, +5V
Digital inputs = 0 or V
DD
±0.1
5
0.7 x
V
DD
0.3 x
V
DD
±1
V
V
µA
pF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5742
TIMING CHARACTERISTICS
(V
DD
= 2.7V to 5.5V, GND = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SCLK Clock Frequency
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise Setup Time
SCLK Fall to
CS
Rise Setup Time
DIN to SCLK Fall Setup Time
DIN to SCLK Fall Hold Time
CS
Pulse Width High
SYMBOL
f
SCLK
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
CSW
CONDITIONS
MIN
0
25
25
10
10
15
0
80
TYP
MAX
20
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
DC specifications are tested without output loads.
Linearity guaranteed from code 115 to code 3981.
Limited with test conditions.
Offset and gain error limit the FSR.
Guaranteed by design.
_______________________________________________________________________________________
3
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
MAX5742
__________________________________________Typical Operating Characteristics
(V
REF
= V
DD
, T
A
= +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY vs.
CODE, T
A
= +25°C
MAX5742 toc01
DIFFERENTIAL NONLINEARITY vs.
CODE, T
A
= +25°C
MAX5742 toc02
TOTAL UNADJUSTED ERROR vs.
CODE, T
A
= +25°C
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
V
DD
= +5V
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
V
DD
= +3V
MAX5742 toc03
16
12
8
INL (LSB)
1.0
0.8
0.6
0.4
DNL (LSB)
0.2
0
-0.2
-0.4
1.0
TOTAL UNADJUSTED ERROR (%)
4
0
-4
-8
-12
-16
0
V
DD
= +5V
V
DD
= +3V
-0.6
-0.8
-1.0
512 1024 1536 2048 2560 3072 3584 4096
CODE
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
INTEGRAL NONLINEARITY vs.
CODE, T
A
= -40°C
MAX5742 toc04
DIFFERENTIAL NONLINEARITY vs.
CODE, T
A
= -40°C
MAX5742 toc05
TOTAL UNADJUSTED ERROR vs.
CODE, T
A
= -40°C
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
V
DD
= +5V
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
V
DD
= +3V
MAX5742 toc06
16
12
8
INL (LSB)
4
0
-4
-8
-12
-16
0
V
DD
= +3V
V
DD
= +5V
1.0
0.8
0.6
0.4
0.2
LSB
0
-0.2
-0.4
-0.6
-0.8
1.0
TOTAL UNADJUSTED ERROR (%)
512 1024 1536 2048 2560 3072 3584 4096
CODE
-1.0
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
INTEGRAL NONLINEARITY vs.
CODE, T
A
= +125°C
MAX5742 toc07
DIFFERENTIAL NONLINEARITY vs.
CODE, T
A
= +125°C
MAX5742 toc08
TOTAL UNADJUSTED ERROR vs.
CODE, T
A
= +125°C
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
V
DD
= +5V
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
V
DD
= +3V
MAX5742 toc09
16
12
8
INL (LSB)
1.0
0.8
0.6
0.4
DNL (LSB)
0.2
0
-0.2
-0.4
-0.6
-0.8
1.0
TOTAL UNADJUSTED ERROR (%)
4
0
-4
-8
-12
-16
0
V
DD
= +5V
V
DD
= +3V
512 1024 1536 2048 2560 3072 3584 4096
CODE
-1.0
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
4
_______________________________________________________________________________________
12-Bit, Low-Power, Quad, Voltage-Output
DAC with Serial Interface
MAX5742
Typical Operating Characteristics (continued)
(V
REF
= V
DD
, T
A
= +25°C, unless otherwise noted.)
WORST-CASE INL AND DNL
vs. TEMPERATURE
MAX5742 toc10
SOURCE-AND-SINK CURRENT CAPABILITY
(V
DD
= +3V)
MAX5742 toc11
SOURCE-AND-SINK CURRENT CAPABILITY
(V
DD
= +5V)
4.5
4.0
3.5
V
OUT
(V)
3.0
2.5
2.0
1.5
1.0
CODE = C00 HEX,
SOURCING CURRENT
FROM OUT_
CODE = 400 HEX,
SINKING CURRENT
INTO OUT_
CODE = 000 HEX,
SINKING CURRENT INTO OUT_
0
2
4
6
8
10
12
14
16
CODE = FFF HEX, SOURCING
CURRENT FROM OUT_
MAX5742 toc12
MAX5742 toc15
16
12
8
INL AND DNL (LSB)
MAXIMUM INL
3.0
2.5
2.0
V
OUT
(V)
1.5
1.0
CODE = C00
HEX, SOURCING
CURRENT
FROM OUT_
CODE = 400 HEX,
SINKING CURRENT
INTO OUT_
CODE = 000 HEX,
SINKING CURRENT INTO OUT_
0
2
4
6
8
10
12
14
CODE = FFF
HEX, SOURCING
CURRENT
FROM OUT_
5.0
4
0
-4
-8
-12
-16
-40 -20
MAXIMUM DNL
MINIMUM DNL
MINIMUM INL
0.5
0
0
80
TEMPERATURE (°C)
20
40
60
100 120
0.5
16
0
I
SOURCE/SINK
(mA)
I
SOURCE/SINK
(mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX5742 toc13
POWER-DOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
POWER-DOWN SUPPLY CURRENT (nA)
MAX5742 toc14
SUPPLY CURRENT vs. CS INPUT VOLTAGE
900
800
SUPPLY CURRENT (µA)
700
600
500
400
300
200
100
V
DD
= +3V
V
DD
= +5V
480
CODE = 0 x 800
400
SUPPLY CURRENT (µA)
320
CODE = 0 x 000
240
160
80
0
2.7
3.2
3.7
4.2
4.7
5.2
SUPPLY VOLTAGE (V)
CODE = 0 x FFF
300
250
200
150
100
50
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
5.5
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
CS INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
280
SUPPLY CURRENT (µA)
270
260
250
240
230
220
210
200
-40 -20
0
20
40
60
80
100 120
TEMPERATURE (°C)
V
DD
= 3.6V
V
DD
= 5.5V
MAX5742 toc16
290
_______________________________________________________________________________________
5
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