AD5122BRUZ100-RL7

Overview

The AD5122BRUZ100-RL7 is a dual-channel, nonvolatile digital potentiometer featuring 128 tap positions and an SPI interface. It offers a nominal resistance of 100 kΩ with ±8% tolerance and a temperature coefficient of 35 ppm/°C. The device operates on a single supply from 2.3 V to 5.5 V or a dual supply of ±2.25 V to ±2.75 V, with a logic supply range of 1.8 V to 5.5 V. Key electrical parameters include a maximum wiper current of ±1.5 mA for the 100 kΩ variant, a bandwidth of 0.43 MHz, and low power consumption of 700 nA at 5.5 V. It is housed in a 16-lead TSSOP package.

Feature Summary

• Dual-channel architecture with 128-position resolution and nonvolatile EEPROM storage.
• SPI-compatible digital interface with independent logic supply (1.8 V to 5.5 V).
• Wide operating temperature range from -40°C to +125°C.
• Linear gain setting mode via INDEP pin for independent string resistor programming.

Applications

• Portable electronics level adjustment
• LCD panel brightness and contrast controls
• Programmable filters, delays, and time constants
• Programmable power supplies

Procurement Notes

Verify the specific suffix '-RL7' indicates reel packaging when sourcing. Confirm the 'B' grade corresponds to the industrial temperature range (-40°C to +125°C) and ±8% tolerance. Ensure the 'U' designation matches the TSSOP-16 package requirement for the target PCB layout.

Selection Notes

Select this model for applications requiring dual independent potentiometers with persistent settings after power loss. The 100 kΩ resistance value limits the maximum continuous wiper current to ±1.5 mA; ensure load requirements do not exceed this limit. For higher current needs, consider the 10 kΩ variant which supports ±6 mA.

Part Context

This component belongs to the AD5122/AD5142 family of dual-channel digital potentiometers. The AD5122 specifically provides 128 taps, whereas the AD5142 offers 256 taps. Both share similar electrical characteristics but differ in resolution. The BRUZ100 variant specifies the B grade, TSSOP package, and 100 kΩ resistance.

Replacement Considerations

The AD5122BRUZ100 is a compatible alternative if reel packaging is not required. For I2C interface compatibility within the same package and resistance, the AD5122ABRUZ100 series may be considered, though the interface protocol differs significantly.