MAX522EPA+【PDF 1/12 页】IC DAC 8BIT DUAL SERIAL 8-DIP

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_______________General Description

The MAX522 contains two 8-bit, buffered, voltage-output

digital-to-analog converters (DAC A and DAC B) in small

8-pin SO and DIP packages. DAC A’s buffer can source

and sink 5mA, and DAC B’s output can source and sink

500A, both to within 0.5V of ground and VDD. The

MAX522 operates with a single +2.7V to +5.5V supply.

The device utilizes a 3-wire serial interface, which oper-

ates at clock rates up to 5MHz and is compatible with

SPI, QSPI, and Microwire interface standards.

The serial input shift register is 16 bits long and con-

sists of eight bits of DAC input data and eight bits for

DAC selection and shutdown control. DAC registers

can be loaded independently or in parallel at the posi-

tive edge of CS.

The MAX522’s ultra-low power consumption and small

8-pin SO package make it ideal for portable and bat-

tery-powered applications. Supply current is less than

1mA and drops below 1A in shutdown mode. In addi-

tion, the reference input is disconnected from the REF

pin during shutdown, further reducing the system’s total

power consumption. The software format is compatible

with the MAX512/MAX513 triple 8-bit DACs.

________________________Applications

Digital Gain and Offset Adjustment

Programmable Current Source

Programmable Voltage Source

Power-Amp Bias Control

VCO Tuning

____________________________Features

o Operates from a Single +2.7V to +5.5V Supply

o Dual Buffered Voltage Output

o Low Power Consumption:

1mA Operating Current

<1A Shutdown Current

o Independently Programmable Shutdown Mode

o 5MHz, 3-Wire Serial Interface

o SPI, QSPI, and Microwire Compatible

o Space-Saving 8-Pin SO Package

MAX522

Dual, 8-Bit, Voltage-Output

Serial DAC in 8-Pin SO Package

________________________________________________________________

Maxim Integrated Products

DAC

LATCH

DAC A

DAC

LATCH

DAC B

SCLK

OUTA

OUTB

DIN

REF

VDD

16-BIT

SHIFT

CONTROL

(8)

DATA

(8)

MAX522

0.1

(OPTIONAL)

0.01

VOUTA

VOUTB

GND

0.22

________________Functional Diagram

OUTB

VDD

OUTA

GND

DIN

REF

SCLK

MAX522

TOP VIEW

DIP/SO

__________________Pin Configuration

Call toll free 1-800-998-8800 for free samples or literature.

19-0403; Rev 0; 6/95

PART

TEMP. RANGE

PIN-PACKAGE

MAX522CPA

0°C to +70°C

8 Plastic DIP

MAX522CSA

0°C to +70°C

8 SO

MAX522EPA

-40°C to +85°C

8 Plastic DIP

SPI and QSPI are trademarks of Motorola Inc.

Microwire is a trademark of National Semiconductor Corp.

______________Ordering Information

MAX522ESA

-40°C to +85°C

8 SO

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