CAT5132_08 datasheet(1/14 Pages) CATALYST

Part #	CAT5132

Description	16 Volt Digitally Programmable Potentiometer (DPP?? with 128 Taps and I2C Interface

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Manufacturer	CATALYST [Catalyst Semiconductor]

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

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1

Characteristics subject to change without notice

Doc. No. MD-2124, Rev. E

CAT5132

FEATURES

s Single linear DPP with 128 taps

s End-to-end resistance of 10k

Ω

Ω, 50kΩ

Ω

Ω or 100kΩ

Ω

s I2C interface

s Fast Up/Down wiper control mode

s Non-volatile wiper setting storage

s Automatic wiper setting recall at power-up

s Digital Supply range (V

CC): 2.7V to 5.5V

s Analog Supply range (V+): +8V to +16V

s Low Standby Current: 15

µA

s 100 Year wiper setting memory

s Industrial Temperature range: -40oC to +85oC

s RoHS-compliant 10-pin MSOP package

APPLICATIONS

s LCD screen adjustment

s Volume control

s Mechanical potentiometer replacement

s Gain adjustment

s Line impedance matching

s VCOM setting adjustments

DESCRIPTION

The CAT5132 is a high voltage Digitally Programmable

Potentiometer (DPP) with non-volatile wiper setting

memory, operating like a mechanical potentiometer.

The tap points between the 127 equal resistive elements

are connected to the wiper output via CMOS switches.

The switches are controlled by a 7-bit Wiper Control

Register (WCR). The wiper setting can be stored in a

7-bit non-volatile Data Register (DR). The WCR is

accessed via the I2C serial bus.

Upon power-up, the WCR is set to mid-scale (1000000).

After the power supply is stable, the contents of the DR

are transferred to the WCR and the wiper is returned to

the memorized setting.

The CAT5132 has two voltage supplies: VCC, the digital

supply and V+, the analog supply. V+ can be much

higher than VCC, allowing for 16V analog operations.

The CAT5132 can be used as a potentiometer or as a

two-terminal variable resistor.

SDA

SCL

A0

A1

VCC

CONTROL LOGIC AND

ADDRESS DECODE

128 TAP POSITION

DECODE CONTROL

7-BIT WIPER

CONTROL

REGISTER

(WCR)

7-BIT

NONVOLATILE

MEMORY

REGISTER

(DR)

V+

RH

RL

RW

127

0

BLOCK DIAGRAM

For Ordering Information details, see page 13.

16 Volt Digitally Programmable Potentiometer (DPP™)

with 128 Taps and I2C Interface

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