AD5201BRMZ50

Overview

The AD5201BRMZ50 is a single-channel, 33-position digital potentiometer manufactured by Analog Devices Inc. It features a nominal end-to-end resistance of 50 kΩ with a temperature coefficient of 500 ppm/°C and a wiper resistance of 50 Ω to 100 Ω. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V or dual supplies of ±2.7 V. It utilizes a 3-wire SPI-compatible serial interface for control, accepting a 6-bit data word to select one of 33 tap positions. Key electrical characteristics include a differential nonlinearity (DNL) of ±0.5 LSB maximum and an integral nonlinearity (INL) of ±1 LSB maximum. The part is housed in a compact 10-lead MSOP package and guarantees operation over the extended industrial temperature range of –40°C to +85°C.

Feature Summary

• 33-Position Resolution: Provides 33 distinct resistance steps controlled via a 6-bit digital code.
• 50 kΩ Nominal Resistance: Fixed end-to-end resistance with ±30% tolerance and 500 ppm/°C temperature coefficient.
• Low Power Shutdown: SHDN pin forces A terminal open and shorts Wiper to B, achieving microwatt power consumption while retaining latch settings.
• Internal Power-On Preset: Automatically sets the wiper to midscale upon power-up.

Applications

• Mechanical Potentiometer Replacement
• Instrumentation Gain and Offset Adjustment
• Programmable Voltage-to-Current Conversion
• Programmable Filters, Delays, and Time Constants
• Line Impedance Matching

Procurement Notes

Verify the ordering suffix 'BRMZ' corresponds to the specific MSOP-10 package variant and industrial temperature grade (-40°C to +85°C). Confirm the '50' suffix indicates the 50 kΩ nominal resistance value. Ensure compatibility with the 3-wire SPI interface timing requirements, specifically clock pulse width and setup/hold times, when integrating into the system design.

Selection Notes

Select the AD5201BRMZ50 when 33 resolution steps are sufficient for the application, offering higher precision than the 8-position variants but lower complexity than the 256-position AD5200. The 50 kΩ resistance value is suitable for moderate current applications; ensure the load current does not exceed the maximum switch current limits defined in the datasheet. Consider the 50 Ω wiper resistance in low-resistance circuit designs where it may introduce significant error.

Part Context

The AD5201BRMZ50 belongs to the AD5200/AD5201 family of programmable resistor devices. While the AD5200 offers 256 positions (8-bit), the AD5201 provides 33 positions (6-bit). Both share identical electrical characteristics regarding linearity, bandwidth, and power supply ranges, differing primarily in resolution and the number of bits required for serial data input. This family serves as electronic replacements for mechanical potentiometers in space-constrained PCB designs.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.