AD5174BRMZ-10

Overview

The AD5174BRMZ-10 is a single-channel, 1024-position digital rheostat from Analog Devices. It features a nominal resistance of 10 kΩ with ±15% tolerance and a temperature coefficient of 35 ppm/°C in rheostat mode. The device operates on a single supply of 2.7 V to 5.5 V or dual supplies of ±2.5 V to ±2.75 V. It includes 50-times programmable (50-TP) nonvolatile memory for wiper position storage and supports SPI-compatible serial interfaces. The component is available in compact MSOP-10 packages.

Feature Summary

• 1024-position resolution with 10 kΩ nominal resistance
• 50-times programmable (50-TP) nonvolatile memory
• SPI-compatible serial interface with readback capability
• Dual-supply operation: ±2.5 V to ±2.75 V

Applications

• Mechanical rheostat replacements
• Op-amp variable gain control
• Instrumentation gain and offset adjustment
• Programmable voltage-to-current conversions
• Sensor calibration

Procurement Notes

Verify the specific package variant when ordering, as the AD5174 series is offered in both 10-lead LFCSP and 10-lead MSOP configurations. Confirm that the BR suffix indicates the extended industrial temperature range of −40°C to +125°C. Ensure the design accounts for the required 1 μF external capacitor on the EXT_CAP pin for memory programming operations.

Selection Notes

Select this component for applications requiring precise analog resistance control without mechanical wear. The 50-TP memory allows permanent setting of resistance values, eliminating the need for battery-backed RAM. Verify that the system power supply falls within the 2.7 V to 5.5 V single-supply or ±2.5 V to ±2.75 V dual-supply ranges. Consider the 35 ppm/°C temperature coefficient for precision requirements.

Part Context

The AD5174 belongs to the AD517x family of digital potentiometers and rheostats. It is functionally similar to the AD5175 but utilizes an SPI interface instead of I²C. The BRMZ-10 designation specifically identifies the 10 kΩ resistance value, commercial/industrial grade (B), MSOP package (M), and tube packaging (Z).

Replacement Considerations

For direct functional replacement with I²C interface, consider the AD5175BRMZ-10. For higher resolution options, evaluate the AD5176 series. Ensure any substitute matches the 1024-position resolution and 50-TP memory capacity if nonvolatile storage is required.