CAT5111ZI50

Digital Potentiometers Overview

The CAT5111ZI-50 is a single digitally programmable potentiometer (DPP) manufactured by onsemi. It features a 100-tap linear taper resistor array with a nominal resistance of 50 kΩ between terminals RH and RL. The device includes a buffered wiper output (RWB) driven by an operational amplifier capable of rail-to-rail operation. Control is managed via a three-pin serial interface consisting of Chip Select (CS), Up/Down (U/D), and Increment (INC). The wiper position is stored in non-volatile EEPROM, retaining settings during power loss. It operates on a single supply voltage ranging from 2.5 V to 6.0 V.

Digital Potentiometers Feature Summary

• 100-position linear taper potentiometer with non-volatile EEPROM storage for wiper position retention.
• Buffered wiper output utilizing an op-amp for rail-to-rail voltage swing capability.
• Increment/Up-Down serial control interface requiring only three input pins (CS, U/D, INC).
• Single supply operation compatible with 2.5 V to 6.0 V logic levels.

Digital Potentiometers Applications

• Automated product calibration systems.
• Remote control adjustments for inaccessible equipment.
• Offset, gain, and zero control in instrumentation.
• Tamper-proof calibration storage.
• Contrast, brightness, and volume controls in consumer electronics.

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm package type, temperature range, and lead finish. The 'Z' suffix indicates an MSOP-8 package with Matte-Tin plating, while 'I' denotes industrial temperature range. Confirm availability status as distribution channels may vary for specific tape-and-reel quantities.

Digital Potentiometers Selection Notes

Select the CAT5111ZI-50 when a buffered wiper output is required, distinguishing it from the unbuffered CAT5113 series. Ensure the 50 kΩ resistance value aligns with the application's impedance requirements. Verify that the MSOP-8 package dimensions fit the PCB layout constraints and that the operating temperature range meets the system specifications.

Digital Potentiometers Part Context

This component belongs to the CAT5111 family of 100-tap digitally programmable potentiometers. Variants within this family differ primarily by resistance value (10 kΩ, 50 kΩ, 100 kΩ), package style (PDIP, SOIC, TSSOP, MSOP), and temperature rating. The buffered wiper feature specifically enables use as a variable voltage divider or low-impedance source.

Digital Potentiometers Replacement Considerations

The CAT5113LI-50-G serves as a functional substitute if a buffered wiper is not required, offering identical control logic and resistance but without the internal op-amp buffer. Cross-reference pinouts and electrical characteristics to ensure compatibility with existing circuit designs.