AD5170BRMZ50-RL7

Overview

The AD5170BRMZ50-RL7 is a single-channel, 256-position digital potentiometer manufactured by Analog Devices Inc. It features an I2C-compatible serial interface and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device incorporates two-time programmable (TTP) fuse link technology, allowing for permanent resistance setting after unlimited volatile adjustments. Key electrical parameters include a nominal end-to-end resistance of 50 kΩ with a tolerance of ±20% at 25°C, a temperature coefficient of 35 ppm/°C, and a maximum supply current of 6 µA. It is housed in a compact 10-lead MSOP package.

Feature Summary

• Two-Time Programmable (TTP) memory using fuse link technology for permanent settings
• I2C-compatible 2-wire serial interface with additional address decode pins (AD0, AD1)
• Temporary OTP overwrite feature allows dynamic adjustment with user-defined preset restoration on power-up
• Fast settling time of 5 µs typical during power-up

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 when sourcing. Confirm that the B variant denotes the 50 kΩ resistance value. Check component lifecycle status as manufacturing transitions may affect availability. Ensure the design supports the required OTP programming voltage if permanent configuration is needed.

Selection Notes

Select this component for applications requiring nonvolatile resistance settings without external EEPROM. The 50 kΩ value suits moderate impedance circuits. Verify that the system can provide the 5.6 V to 5.8 V supply required for OTP fuse blowing if permanent programming is utilized. The I2C interface requires pull-up resistors on SDA and SCL lines.

Part Context

This part belongs to the AD5170 family of 256-position digital potentiometers. Variants differ primarily by end-to-end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ) and packaging options. The BRM designation indicates the commercial temperature range and MSOP package. The suffix Z typically denotes lead-free compliance in Analog Devices nomenclature.

Replacement Considerations

Direct replacements within the same family include AD5170BRM2.5-RL7 (2.5 kΩ) and AD5170BRM10-RL7 (10 kΩ). Other families like AD5161 or AD5172 offer similar functionality but may lack the TTP feature or use different interfaces such as SPI.