AD5170BRMZ10

Overview

The AD5170BRMZ10 is a single-channel, 256-position digital potentiometer from Analog Devices. It features a 10 kΩ end-to-end resistance with a linear taper and I²C-compatible serial interface. The device employs fuse link technology for two-time programmable (TTP) memory, allowing unlimited volatile adjustments before permanent one-time programming (OTP). Key electrical parameters include a supply voltage range of 2.7 V to 5.5 V, maximum supply current of 6 µA, and a temperature coefficient of 35 ppm/°C. It operates within an extended temperature range of −40°C to +125°C and is housed in a compact 10-lead MSOP package.

Feature Summary

• Two-Time Programmable (TTP) Memory: Fuse link technology allows permanent setting after unlimited volatile adjustments, with an OTP overwrite feature for temporary dynamic changes.
• I²C Interface: Controlled via a standard 2-wire serial bus with additional address decode pins (AD0, AD1) for multiple device support.
• Low Power Consumption: Maximum supply current is 6 µA, with shutdown current as low as 1 µA.
• High Precision: Features a low temperature coefficient of 35 ppm/°C and fast settling time of 5 µs typical during power-up.

Applications

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

Procurement Notes

Verify the specific suffix '10' confirms the 10 kΩ resistance value when sourcing. Confirm the package type is MSOP-10. Check for RoHS compliance status as manufacturing processes may update. Ensure the supplier provides valid datasheets matching Rev. I or later to confirm OTP voltage requirements (5.6 V–5.8 V) and timing characteristics.

Selection Notes

Select this component if a non-volatile digital potentiometer with fuse-based security is required. The 10 kΩ resistance is suitable for moderate impedance applications. Ensure the system can provide the 5.6 V–5.8 V OTP supply voltage if permanent programming is needed. Consider the 10-lead MSOP package dimensions (3 mm × 4.9 mm) for PCB layout constraints.

Part Context

The AD5170 series includes variants with 2.5 kΩ, 10 kΩ, and 50 kΩ resistances. The BRMZ suffix indicates the commercial temperature grade (-40°C to +125°C) and MSOP packaging. This part is part of Analog Devices' DigiPOT family designed to replace mechanical potentiometers in space-constrained applications requiring solid-state reliability.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD5170BRMZ2.5 (2.5 kΩ) and AD5170BRMZ50 (50 kΩ). For different resolution or interface requirements, consider the AD5270 (SPI interface) or AD5175 (1024 positions). Verify that any substitute matches the TTP memory architecture if permanent programming is critical.