CAT5120SDI-10GT3

Digital Potentiometers Overview

The CAT5120SDI-10GT3 is a single-channel digital potentiometer from the CAT5120 family, manufactured by onsemi. It features a linear taper with 16 tap positions and an end-to-end resistance of 10 kΩ. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a typical active current of 25 µA and a standby current of 0.3 µA at 5 V. It utilizes a 2-wire up/down serial interface for wiper control and includes power-on reset functionality that sets the wiper to midscale upon initialization. The component is housed in a space-saving SC-70-6 surface-mount package.

Digital Potentiometers Feature Summary

• 16-tap resolution with linear taper and 10 kΩ nominal resistance
• Ultra-low standby current of 0.3 µA (typical) at VDD = 5 V
• Glitchless switching between resistor taps ensures stable operation
• Power-on reset circuitry defaults wiper position to midscale

Digital Potentiometers Applications

• LCD screen contrast and bias adjustment
• Volume control in audio circuits
• Mechanical potentiometer replacement in embedded systems
• Adjustable gain control for operational amplifiers
• Line impedance matching networks

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'SDI' confirms the SC-70-6 package and 10 kΩ resistance value as listed in the official onsemi ordering information table. Confirm RoHS compliance and Pb-free status requirements against current manufacturing standards before finalizing procurement specifications.

Digital Potentiometers Selection Notes

Select this part when a potentiometer configuration is required, distinguishing it from the CAT5121/5122 variable resistor variants. Ensure the 10 kΩ resistance aligns with circuit load requirements and verify that the SC-70-6 footprint fits the PCB layout constraints compared to the SOT-23 alternative.

Digital Potentiometers Part Context

This component belongs to the CAT5120/5121/5122 series of 16-tap digital potentiometers. While the CAT5121 and CAT5122 are configured as variable resistors, the CAT5120 is specifically designed for potentiometer applications. The SDI suffix denotes the SC-70-6 package variant, whereas TBI indicates the SOT-23-6 option.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include CAT5120TBI-10GT3 (SOT-23-6 package) or CAT5120SDI-50GT3 (50 kΩ resistance). Verify package dimensions and terminal count compatibility when substituting.