CAT5119SDI-50-T

Digital Potentiometers Overview

The CAT5119SDI-50-T3 is a single-channel digital potentiometer IC from the MiniPot series by onsemi. It features a 50 kOhm resistance value with a linear taper and 32 discrete taps for precise adjustment. The device operates within a supply voltage range of 2.7 V to 5.5 V and consumes a typical operating current of 25 uA. It utilizes a 2-wire serial interface for up/down control. The wiper position is stored in volatile memory, requiring retention during power cycles. The component is housed in a compact SC-70-6 surface-mount package and functions reliably across an industrial temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Single channel digital potentiometer with 50 kOhm resistance and linear taper
• 32-tap resolution controlled via a 2-wire serial interface
• Low power consumption with 25 uA operating current at 2.7 V to 5.5 V
• Compact SC-70-6 SMD package suitable for space-constrained designs

Digital Potentiometers Applications

• Volume control in portable audio equipment
• Gain adjustment in sensor signal conditioning circuits
• Voltage reference trimming in measurement systems
• Bias current setting in analog front-end modules

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against manufacturer documentation, as variations such as GT3 indicate reel packaging quantities. Confirm availability status directly with onsemi or authorized distributors, as lead times may vary based on production schedules. Ensure the selected variant matches the required resistance tolerance and temperature coefficient specifications for the target application environment.

Digital Potentiometers Selection Notes

Select this component when a low-pin-count, single-channel digital potentiometer is required. The 50 kOhm value suits moderate impedance applications, while the 32-tap resolution provides sufficient granularity for many control loops. Choose this part over non-volatile variants if power-down retention is not critical, as it offers lower cost and simpler interface requirements compared to EEPROM-based models.

Digital Potentiometers Part Context

This device belongs to the CAT511x family of linear-taper digital potentiometers. It shares architectural similarities with the CAT5110 and CAT5118 but differs in configuration; unlike the CAT5118 which acts as a variable resistor, the CAT5119 is configured as a potentiometer. It complements the CAT5125 series but uses a serial interface instead of increment/decrement control.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same series include the CAT5110SDI-50GT3 (potentiometer config) and CAT5118SDI-50GT3 (variable resistor config). For higher tap counts, consider the CAT5113 series, though it requires a 3-wire interface and different packaging.