AD5170BRMZ100-RL7

Overview

The AD5170BRMZ100-RL7 is a single-channel, 256-position digital potentiometer manufactured by Analog Devices. It features an end-to-end resistance of 100 kΩ and utilizes I²C-compatible serial communication for control. The device employs fuse link technology to enable two-time programmable (TTP) settings, allowing permanent resistance configuration after unlimited volatile adjustments. Operating on a single supply voltage ranging from 2.7 V to 5.5 V, it maintains a low temperature coefficient of 35 ppm/°C and consumes a maximum supply current of 6 µA. The component is housed in a compact 10-lead MSOP package.

Feature Summary

• Two-Time Programmable (TTP) memory using fuse link technology for permanent setting retention
• I²C-compatible 2-wire serial interface with full read/write capability for the wiper register
• 100 kΩ nominal end-to-end resistance with 256 discrete tap positions
• Low power consumption 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 RL7 corresponds to reel packaging requirements. Confirm that the 100 kΩ variant matches the design specifications, as the datasheet explicitly lists 2.5 kΩ, 10 kΩ, and 50 kΩ options. Ensure the system power supply can provide the necessary voltage range for operation and OTP programming if permanent settings are required.

Selection Notes

Select this component when non-volatile resistance settings are needed without external EEPROM. The 100 kΩ value suits high-impedance applications. Note that the datasheet specifies standard values of 2.5 kΩ, 10 kΩ, and 50 kΩ; verify if the 100 kΩ option is available or if a different part number is required for that resistance. Consider the 35 ppm/°C temperature coefficient for precision requirements.

Part Context

The AD5170 series includes variants with 2.5 kΩ, 10 kΩ, and 50 kΩ resistances. The BRMZ suffix indicates a commercial temperature range (-40°C to +85°C) and MSOP-10 package. The -RL7 suffix typically denotes tape and reel packaging. This model represents the 100 kΩ version within the broader family of two-time programmable digital potentiometers.

Replacement Considerations

Direct replacements must support I²C interface and TTP functionality. Verify pin compatibility with the 10-lead MSOP package. Check if alternative models like the AD5171 or AD5172 offer similar features with different resolutions or interfaces.