Rainbow-electronics MAX522 Bedienungsanleitung PDF herunterladen

_______________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

500µA, both to within 0.5V of ground and V

. 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 1µA 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

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

♦ Dual Buffered Voltage Output

♦ Low Power Consumption:

1mA Operating Current

<1µA Shutdown Current

♦ Independently Programmable Shutdown Mode

♦ 5MHz, 3-Wire Serial Interface

♦ SPI™, QSPI™, and Microwire™ Compatible

♦ 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

16-BIT SHIFT REGISTER

CONTROL (8) DATA (8)

MAX522

0.1µF

0.1µF

(OPTIONAL)

0.01µF

OUTA

OUTB

GND4

0.22µF

________________Functional Diagram

OUTB

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

1 2 3 4 5 6 ... 11 12

Dual, 8-Bit, Voltage-Output 1

Inhaltsverzeichnis

Seite 1 - Dual, 8-Bit, Voltage-Output

_______________General DescriptionThe MAX522 contains two 8-bit, buffered, voltage-outputdigital-to-analog converters (DAC A and DAC B) in small8-pin

Seite 2

Digital InputsThe digital inputs are compatible with CMOS logic.Supply current increases slightly when toggling thelogic inputs through the transition

Seite 3