MAX5722AUA MAXIM [Maxim Integrated Products], MAX5722AUA Datasheet

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MAX5722AUA

Manufacturer Part Number
MAX5722AUA
Description
12-Bit, Low-Power, Dual, Voltage-Output DAC with Serial Interface
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
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
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
MAX5722’s reference input accepts a voltage range
from 0 to V
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
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 , 100k , or high
impedance) while in power-down. The MAX5722 is
specified over the -40°C to +125°C automotive temper-
ature range.
19-2124; Rev 2; 7/03
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.
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.
Automatic Tuning
Gain and Offset Adjustment
Power Amplifier Control
Process Control I/O Boards
Battery-Powered Instruments
VCO Control
DD
. In power-down, the reference input is
________________________________________________________________ Maxim Integrated Products
12-Bit, Low-Power, Dual, Voltage-Output
General Description
resistor to ground. This pro-
Applications
®
3mm).
. The
DAC with Serial Interface
o Ultra-Low Power Consumption
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
o Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-
o Rail-to-Rail Output Buffer Amplifiers
o Schmitt-Triggered Logic Inputs for Direct
o Wide -40 C to +125 C Operating Temperature
MAX5722EUA
MAX5722AUA
Impedances (100k , 1k , Hi-Z)
Compatible Serial Interface
Interfacing to Optocouplers
Range
TOP VIEW
PART
112µA at V
135µA at V
SCLK
GND
V
CS
DD
DD
DD
1
2
4
3
-40°C to +85°C
-40°C to +125°C
TEMP RANGE
= +3.6V
= +5.5V
Ordering Information
MAX5722
MAX
Pin Configuration
6
8
7
5
OUTB
OUTA
REF
DIN
8 µMAX
8 µMAX
PIN-PACKAGE
Features
1

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MAX5722AUA Summary of contents

Page 1

... 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 - +125 C Operating Temperature Range Applications PART MAX5722EUA MAX5722AUA TOP VIEW Features = +3. +5.5V DD Ordering Information TEMP RANGE PIN-PACKAGE -40° ...

Page 2

Low-Power, Dual, Voltage-Output DAC with Serial Interface ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD OUT_, SCLK, DIN, CS, REF to GND .............-0 Maximum Continuous Current Into Any Pin......................±50mA Continuous Power Dissipation (T = +70°C) ...

Page 3

Low-Power, Dual, Voltage-Output ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, GND = REF V = +5V +25°C PARAMETER SYMBOL DIGITAL INPUTS (SCLK, DIN, CS) Input High Voltage Input Low Voltage Input ...

Page 4

Low-Power, Dual, Voltage-Output DAC with Serial Interface ( +25°C, unless otherwise noted.) REF DD A INTEGRAL NONLINEARITY vs. CODE + + ...

Page 5

Low-Power, Dual, Voltage-Output ( +25°C, unless otherwise noted.) REF DD A WORST CASE INL AND DNL vs. TEMPERATURE MAXIMUM INL MAXIMUM DNL MINIMUM DNL -8 MINIMUM INL -12 ...

Page 6

Low-Power, Dual, Voltage-Output DAC with Serial Interface ( +25°C, unless otherwise noted.) REF DD A HALF-SCALE SETTLING TIME (V = +3V) DD CODE 400 HEX to C00 HEX ...

Page 7

Low-Power, Dual, Voltage-Output ( +25°C, unless otherwise noted.) REF DD A DIGITAL-TO-ANALOG GLITCH IMPULSE (V = +3V s/div POWER-ON RESET, SLOW RISE TIME (V = +5V s/div POWER-ON RESET, SLOW ...

Page 8

Low-Power, Dual, Voltage-Output DAC with Serial Interface ( +25°C, unless otherwise noted.) REF DD A CLOCK FEEDTHROUGH (V = +3V) DD 100ns/div LINE TRANSIENT RESPONSE (V = +3V s/div 8 _______________________________________________________________________________________ Typical ...

Page 9

Low-Power, Dual, Voltage-Output PIN NAME 1 V Power-Supply Input DD 2 GND Ground CS 3 Chip-Select Input 4 SCLK Serial-Clock Input 5 DIN Serial Data Input 6 REF External Reference Voltage Input DAC Voltage Outputs. Power-on reset sets DAC ...

Page 10

Low-Power, Dual, Voltage-Output DAC with Serial Interface Table 1. Power-Down Mode Control EXTENDED DATA BITS CONTROL D11– ...

Page 11

Low-Power, Dual, Voltage-Output CONTENTS OF SHIFT REGISTER B15 (MSB D11 Figure 1. 16-Bit Input Word SCLK DIN CSW CSS CS Figure 2. Timing Diagram REF ...

Page 12

Low-Power, Dual, Voltage-Output DAC with Serial Interface Table 2. Serial-Interface Programming Commands CONTROL DATA BITS D11– ...

Page 13

Low-Power, Dual, Voltage-Output V DD INPUT DAC REGISTER A REGISTER B INPUT DAC REGISTER B REGISTER B INPUT CONTROL LOGIC AND SHIFT REGISTER GND CS SCLK DIN Power Supply and Layout Considerations Careful PC board layout is important for ...

Page 14

Low-Power, Dual, Voltage-Output DAC with Serial Interface (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 D ...

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