CAT523WI datasheet(1/15 Pages) CATALYST

Part #	CAT523WI

Description	Dual Digitally Programmable Potentiometer (DPP?? with 256 Taps and Microwire Interface

PDF	15 Pages

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Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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CAT523

1

Doc. No. MD-2005 Rev. G

Characteristics subject to change without notice

Dual Digitally Programmable Potentiometer (DPP™) with

256 Taps and Microwire Interface

FEATURES

Two 8-bit DPPs configured as programmable

voltage sources in DAC-like applications

Common reference inputs

Non-volatile NVRAM memory wiper storage

Output voltage range includes both supply rails

2 independently addressable buffered

output wipers

1 LSB accuracy, high resolution

Serial microwire-like interface

Single supply operation: 2.7V - 5.5V

Setting read-back without effecting outputs

For Ordering Information details, see page 12.

APPLICATIONS

Automated product calibration.

Remote control adjustment of equipment

Offset, gain and zero adjustments in self-

calibrating and adaptive control systems.

Tamper-proof calibrations.

DAC (with memory) substitute

PIN CONFIGURATION

PDIP 14-Lead (L)

SOIC 14-Lead (W)

VDD 1

14 VREFH

CLK 2

13 VOUT1

RDY/BSY

¯¯¯¯ 3

12 VOUT2

CS 4

11 NC

DI 5

10 NC

DO 6

9

VREFL

PROG 7

8

GND

CAT523

DESCRIPTION

The CAT523 is a dual, 8-bit digitally-programmable

potentiometer (DPP™) configured for programmable

voltage and DAC-like applications. Intended for final

calibration of products such as camcorders, fax

machines and cellular telephones on automated high

volume production lines, it is also well suited for

systems capable of self calibration, and applications

where equipment which is either difficult to access or in a

hazardous environment, requires periodic adjustment.

The two independently programmable DPPs have a

common output voltage range which includes both

supply rails. The wipers are buffered by rail to rail op

amps. Wiper settings, stored in non-volatile NVRAM

memory, are not lost when the device is powered

down and are automatically reinstated when power is

returned. Each wiper can be dithered to test new

output values without effecting the stored settings and

stored settings can be read back without disturbing

the DPP’s output.

Control of the CAT523 is accomplished with a simple

3-wire, Microwire-like serial interface. A Chip Select

pin allows several CAT523's to share a common serial

interface and communication back to the host

controller is via a single serial data line thanks to the

CAT523’s Tri-Stated Data Output pin. A RDY/BSY

¯¯¯¯

output working in concert with an internal low voltage

detector signals proper operation of non-volatile

NVRAM memory Erase/Write cycle.

The CAT523 is available in the 0°C to 70°C

Commercial and -40°C to + 85°C Industrial operating

temperature ranges and offered in 14-pin plastic DIP

and SOIC mount packages.

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