Digital Potentiometers (POTs) | CAT5171

Digital Potentiometer (POT), 256-Tap, I2C Compatible

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Overview

The CAT5171 is a 256-position linear taper digital POT ideally suited for replacing mechanical potentiometers and variable resistors.

The wiper settings are controlled through an I2C-compatible digital interface. Upon power-up, the wiper assumes a midscale position and may be repositioned anytime after the power is stable. The device can be programmed to reset the wiper position to midscale or to go to a shutdown state during operation. An address input pin, AD0, allows the connection of two devices onto the same I2C bus.

The CAT5171 operates from 2.7 V to 5.5 V, while consuming less than 2 µA. This low operating current, combined with a small package footprint, makes the CAT5171 ideal for battery-powered portable applications.

The CAT5171 is designed as a pin for pin replacement for the AD5245 and operates over the -40°C to +85°C industrial temperature range.

  • Potentiometer Replacement
  • Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors
  • RF Amplifier Biasing
  • Gain Control and Offset Adjustment
  • Industrial Equipment
  • 256-position
  • End-to-End Resistance: 50 kΩ, 100 kΩ
  • I2C Compatible Interface
  • Power-on Preset to Midscale
  • Single Supply 2.7 V to 5.5 V
  • Low Temperature Coefficient 100 ppm/°C
  • Low Power, IDD 2 µA max
  • Wide Operating Temperature -40°C to +85°C

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CAD Models

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

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# of Pots

# of Taps

Type

Control Interface

Resistance Typ (kΩ)

VH Max (V)

Wiper Position Memory

VDD Max (V)

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CAT5171TBI-00GT3

Active

Pb

A

H

P

SOT-23-8

527AK

1

260

REEL

3000

Y

1

256

Potentiometer

I2C

100

VCC

No

5.5

$0.69

More Details

CAT5171TBI-50GT3

Active

Pb

A

H

P

SOT-23-8

527AK

1

260

REEL

3000

Y

1

256

Potentiometer

I2C

50

VCC

No

5.5

$0.4533

More Details

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