AD5162BRM100-RL7

Overview

The AD5162BRMZ100-RL7 is a dual-channel, 8-bit SPI digital potentiometer with 256 tap positions and a nominal end-to-end resistance of 100 kΩ. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a maximum supply current of 6 µA. The device features a linear taper, a temperature coefficient of 35 ppm/°C, and a typical power-up settling time of 5 µs. Wiper settings are volatile and controlled via a standard SPI interface. It is housed in a compact 10-lead MSOP package (3 mm × 4.9 mm) and supports an operating temperature range from −40°C to +125°C.

Feature Summary

• Dual-channel architecture providing two independent 256-position variable resistors within a single 10-lead MSOP package.
• SPI-compatible 3-wire serial interface supporting clock frequencies up to 25 MHz for rapid wiper register updates.
• Power-on preset functionality automatically initializes both wipers to the midscale position upon power-up.
• Low power consumption with a maximum supply current of 6 µA, suitable for battery-operated portable applications.

Applications

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

Procurement Notes

Verify that the specific suffix 'MZ' corresponds to the MSOP-10 package and '100' indicates the 100 kΩ resistance value. Confirm the '-RL7' designation matches the required reel packaging format. Ensure the component meets automotive qualification requirements if intended for such environments, as indicated by the datasheet features.

Selection Notes

Select this model when a dual-channel configuration is required, as opposed to the single-channel AD5160 or AD5161. The 100 kΩ resistance value is appropriate for high-impedance signal paths. Verify that the volatile memory type aligns with the application's need to reprogram settings at startup, as the device does not retain wiper positions after power loss without external circuitry.

Part Context

This component belongs to the AD5162 family of dual digital potentiometers manufactured by Analog Devices. It serves as the electronic equivalent of a 3-terminal mechanical potentiometer but offers digital programmability via SPI. The BR variant typically denotes industrial temperature grade specifications, while the MZ suffix identifies the specific surface-mount package geometry.

Replacement Considerations

For single-channel replacements, consider the AD5160 series. For non-volatile storage capabilities, the AD5122 series is available. Direct pin-for-pin substitution requires verifying that the replacement part maintains the same 100 kΩ resistance and MSOP-10 footprint.

FAQ

["What is the default wiper position upon power-up?","The AD5162 includes a power-on preset feature that places both wipers at the midscale position (code 0x80) during power-up."]

["How is the resistance adjusted digitally?","The resistance is adjusted using a 3-wire SPI-compatible interface (SDI, CLK, CS). An 8-bit data word is loaded MSB-first into the RDAC latch to select one of the 256 tap positions."]

["What is the maximum clock frequency for the SPI interface?","The maximum serial clock frequency (fCLK) for the SPI interface is 25 MHz."]

["Does the device retain its resistance setting after power is removed?","No, the AD5162 has volatile wiper memory. The resistance setting is lost when power is removed unless a constant bias is maintained or an external non-volatile memory solution is used."]