MAX5742 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 12-Bit, Low-Power, Quad, Voltage-Output DAC with Serial Interface

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.
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
Features
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
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
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.
TOP VIEW
CS 1
SCLK 2
V_DD 3
GND 4
DIN 5
MAX5742
µMAX
10 OUTD
9 OUTC
8 OUTB
7 OUTA
6 REF
________________________________________________________________ Maxim Integrated Products 1
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