MAX5721 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 10-Bit, Low-Power, Dual, Voltage-Output DAC with Serial Interface

19-2125; Rev 2; 7/03
10-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
General Description
The MAX5721 dual 10-bit, low-power, buffered voltage-
output, digital-to-analog converter (DAC) is packaged
in a space-saving 8-pin µMAX package (5mm ✕ 3mm).
The wide supply voltage range of +2.7V to +5.5V and
112µA supply current accommodate low-power and
low-voltage applications. DAC outputs employ on-chip
precision output amplifiers that swing Rail-to-Rail^®. The
MAX5721’s reference input accepts a voltage range
from 0 to V_DD. In power-down the reference input is
high impedance, further reducing the system’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 MAX5721 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 MAX5721’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
MAX5721 is specified over the -40°C to +125°C auto-
motive temperature range
Features
o Ultra-Low Power Consumption
112µA at V_DD = +3.6V
135µA at V_DD = +5.5V
o Wide +2.7V to +5.5V Single-Supply Range
o Tiny 8-Pin µMAX Package
o 0.3µA Power-Down Current
o Guaranteed 10-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
Interface to Optocouplers
o Wide -40°C to +125°C Operating Temperature
Range
Applications
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
PART
MAX5721EUA
MAX5721AUA
TOP VIEW
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +125°C
PIN-PACKAGE
8 µMAX
8 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.
V_DD 1
GND 2
CS 3
SCLK 4
MAX5721
8 OUTB
7 OUTA
6 REF
5 DIN
µMAX
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
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