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MAX5722 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX5722
Description  12-Bit, Low-Power, Dual, Voltage-Output DAC with Serial Interface
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX5722 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX5722 dual,12-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 accommodates low-power and
low-voltage applications. DAC outputs employ on-chip
precision output amplifiers that swing Rail-to-Rail®. The
MAX5722’s reference input accepts a voltage range
from 0 to VDD. 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 save board space and
reduce the complexity of opto- and transformer-isolated
applications. The MAX5722 on-chip power-on reset
(POR) circuit resets the DAC outputs to zero and loads
the output with a 100k
Ω resistor to ground. This pro-
vides additional safety for applications that drive valves
or other transducers that need to be off on power-up.
The MAX5722’s software-controlled power-down
reduces supply current to less than 0.3µA and provides
software-selectable output loads (1k
Ω, 100kΩ, or high
impedance) while in power-down. The MAX5722 is
specified over the -40°C to +125°C automotive temper-
ature 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
112µA at VDD = +3.6V
135µA at VDD = +5.5V
o Wide +2.7V to +5.5V Single-Supply Range
o 8-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 (100k
Ω, 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
12-Bit, Low-Power, Dual, Voltage-Output
DAC with Serial Interface
________________________________________________________________ Maxim Integrated Products
1
REF
DIN
SCLK
1
2
8
7
OUTB
OUTA
GND
VDD
µMAX
TOP VIEW
3
4
6
5
MAX5722
CS
Pin Configuration
19-2124; Rev 2; 7/03
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.
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.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5722EUA
-40°C to +85°C
8 µMAX
MAX5722AUA
-40°C to +125°C
8 µMAX
Functional Diagram appears at end of data sheet.


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