AD5170BRM100-RL7

Overview

The AD5170BRM100-RL7 is a single-channel, 256-position digital potentiometer manufactured by Analog Devices. It features a nominal end-to-end resistance of 100 kΩ and utilizes an I²C-compatible serial interface for control. The device employs fuse link technology to enable two-time programmable (TTP) settings, allowing users to permanently program the resistance value after unlimited volatile adjustments. Operating on a single supply voltage ranging from 2.7 V to 5.5 V, it offers a low temperature coefficient of 35 ppm/°C and a typical power-on preset to midscale. The component is housed in a compact 10-lead MSOP package.

Feature Summary

• Two-Time Programmable (TTP) memory using fuse link technology for permanent resistance setting
• I²C-compatible 2-wire serial interface with full read/write capability for the wiper register
• Nominal resistance of 100 kΩ with 256 tap positions and a 35 ppm/°C temperature coefficient
• Single supply operation from 2.7 V to 5.5 V with a maximum supply current of 6 µA

Applications

• Systems calibration and electronics level setting
• Replacement for mechanical trimmers in new designs
• Permanent factory PCB settings
• Transducer adjustment for pressure, temperature, position, chemical, and optical sensors
• RF amplifier biasing and gain control

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact resistance value and packaging type. The datasheet indicates that the base AD5170 series includes 2.5 kΩ, 10 kΩ, and 50 kΩ variants; ensure the '100' designation in the part number aligns with the required 100 kΩ specification or consult the latest ordering guide for availability of this specific resistance value.

Selection Notes

Select this component when a non-volatile, solid-state alternative to mechanical potentiometers is required for factory programming applications. The TTP feature allows for unlimited adjustments prior to permanent programming, providing a second chance for setting configuration. Ensure the system power supply can provide the necessary voltage range and consider the need for an external higher voltage source if OTP programming requires VDD_OTP between 5.6 V and 5.8 V.

Part Context

The AD5170 belongs to a family of 256-position digital potentiometers that utilize fuse link technology for memory retention. This technology distinguishes it from standard volatile digital potentiometers by offering permanent storage without the complexity of EEPROM. The device serves as a software-replaceable solution for MicroConverter® applications and provides enhanced reliability and resolution compared to traditional mechanical variable resistors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.