AD5172BRM100

Overview

The AD5172BRM100 is a dual-channel, 256-position digital potentiometer featuring one-time programmable (OTP) memory. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes an I²C-compatible serial interface for control. The device offers end-to-end resistance options of 2.5 kΩ, 10 kΩ, and 100 kΩ, with the BRM100 variant providing 100 kΩ nominal resistance. It includes a low temperature coefficient of 35 ppm/°C and supports power-on preset to midscale. The component is housed in a compact 10-lead MSOP package measuring 3 mm × 4.9 mm.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for permanent setting retention
• I²C-compatible 2-wire serial interface for data transfer
• Low power consumption with maximum supply current of 6 µA

Applications

• Systems calibration requiring permanent factory settings
• Replacement for mechanical trimmers in new designs
• Transducer adjustment for pressure, temperature, and optical sensors
• RF amplifier biasing and gain control circuits

Procurement Notes

Verify the specific ordering suffix to confirm the exact resistance value and package type. The BRM100 designation indicates a 100 kΩ resistor network in an MSOP package. Confirm that the application circuit can provide the required 5.6 V to 5.8 V supply voltage during the OTP programming phase, as standard operating voltages are insufficient for fuse blowing.

Selection Notes

Select this component when non-volatile resistance settings are required without external EEPROM. Ensure the system design accommodates the temporary high-voltage requirement for OTP activation. Compare against the AD5173 if multiple device addressing via AD0 and AD1 pins is necessary, as the AD5172 lacks these address decode pins.

Part Context

This part belongs to the AD5172/AD5173 family of 256-position digital potentiometers. It shares functional similarities with the AD5173 but differs in pin configuration regarding address inputs. The series utilizes thin-film technology for low temperature coefficients and offers a cost-effective alternative to traditional EEMEM solutions for fixed-setting applications.

Replacement Considerations

Public confirmed substitute part numbers: None.