CAT5172TBI-00GT3

Digital Potentiometers Overview

The CAT5172TBI-00GT3 is a single-channel digital potentiometer manufactured by onsemi. It features 256 adjustable taps and utilizes an SPI-compatible serial interface for control. The device offers a resistance value of 0 Ohms, functioning as a digitally controlled variable resistor or shorting element. It operates within a supply voltage range of 2.7 V to 5.5 V and consumes a typical operating current of 300 nA. The component is housed in an SOT-23-8 surface-mount package and supports linear taper characteristics with volatile wiper memory.

Digital Potentiometers Feature Summary

• 256-position resolution via SPI-compatible serial interface
• 0 Ohm resistance configuration for variable resistance applications
• Low power consumption with 300 nA operating current
• Wide supply voltage operation from 2.7 V to 5.5 V

Digital Potentiometers Applications

• Digital trimming of analog signal paths
• Voltage reference adjustment
• Gain control in amplifier circuits
• System calibration and offset nulling

Digital Potentiometers Procurement Notes

Verify the specific suffix '00' indicates the 0 Ohm resistance variant, distinct from other resistance values in the CAT5172 family. Confirm the TBI temperature grade (-40°C to +85°C) and GT3 tape-and-reel packaging details match system requirements. Cross-reference the latest datasheet revision to ensure pinout and electrical specifications remain unchanged.

Digital Potentiometers Selection Notes

Select this component when a digitally programmable zero-ohm resistor or fine-adjustment variable resistor is required. Ensure the design utilizes an SPI master compatible with the device's clock polarity and phase settings. Consider the volatile nature of the wiper position, which requires state restoration upon power-up if retention across resets is necessary.

Digital Potentiometers Part Context

This part belongs to the CAT5172 series of 256-position digital potentiometers. It shares architectural similarities with the CAT5171 (I2C interface) but differs in its serial communication protocol. The 0 Ohm variant allows for precise attenuation or circuit bypassing, offering a flexible alternative to fixed resistors or mechanical switches in space-constrained PCB designs.

Digital Potentiometers Replacement Considerations

Direct functional substitutes include the AD5160BRJ50 from Analog Devices, which also provides 256 positions and SPI compatibility. Other onsemi alternatives like the CAT5171 offer I2C interfaces instead of SPI. Verify pin-to-pin compatibility and interface timing parameters before substituting.