AD5162BRM100

Overview

The AD5162BRM100 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 compact 10-lead MSOP package (3 mm × 4.9 mm) and supports full read/write access to the wiper register via an SPI-compatible interface. Key electrical characteristics include a typical settling time of 5 µs at power-up, a temperature coefficient of 35 ppm/°C, and a guaranteed monotonic operation across the specified operating temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture providing two independent 256-position variable resistors in a single package.
• SPI-compatible 3-wire serial interface (SDI, CLK, CS) for digital control of wiper settings.
• Low power consumption with a maximum supply current of 6 µA, suitable for battery-operated systems.
• Power-on preset function initializes both wipers to midscale upon power-up.

Applications

• Systems calibrations and permanent factory PCB settings.
• Replacement for mechanical trimmers in new designs.
• Electronics level settings and gain control/offset adjustment.
• Transducer adjustment for pressure, temperature, position, chemical, and optical sensors.
• RF amplifier biasing and automotive electronics adjustment.

Procurement Notes

Verify that the specific ordering suffix matches the required resistance value and package type. Confirm compliance with RoHS directives and automotive qualification requirements if applicable to the target application. Ensure the source documentation corresponds to the exact part number to avoid discrepancies in pinout or electrical specifications.

Selection Notes

Select this component when a dual-channel digital potentiometer with high resistance values is required. The 100 kΩ end-to-end resistance offers lower current draw compared to lower resistance variants but results in reduced bandwidth. Verify that the system's SPI controller can support the required clock frequency and data format. Consider the volatile memory nature of the wiper setting, which requires external retention logic or constant biasing to maintain state during power loss.

Part Context

The AD5162 belongs to Analog Devices' family of 256-position digital potentiometers. This series includes variants with different end-to-end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ) and channel counts. The BRM100 designation specifically indicates the 100 kΩ resistance variant housed in the MSOP-10 package. Other members of the family may feature non-volatile memory or different interface protocols.

Replacement Considerations

Direct replacements within the same family include AD5162BRMZ100 and AD5162BRM50-RL7, provided the resistance value and package compatibility are verified. Cross-family replacements such as the AD5142 series offer non-volatile memory but may differ in interface protocol or pin configuration. Always consult the specific datasheet for any substitute to ensure functional equivalence.