AD5162BRMZ50

Overview

The AD5162BRMZ50 is a dual-channel, 8-bit SPI digital potentiometer from Analog Devices. It features two independent 256-position variable resistors with an end-to-end resistance of 50 kΩ and a tolerance of ±20%. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a maximum supply current of 6 µA. It utilizes a compact 10-lead MSOP package (3 mm × 4.9 mm) and supports full read/write access to the wiper register via a standard SPI interface. The unit includes a power-on preset to midscale and maintains a low temperature coefficient of 35 ppm/°C across an operating temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 256 discrete tap positions per channel
• SPI-compatible 3-wire serial interface for digital control
• End-to-end resistance of 50 kΩ with ±20% tolerance at 25°C
• Low power consumption: 6 µA maximum supply current
• Power-on reset defaults wipers to midscale position

Applications

• Systems calibration and electronics level settings
• Replacement for mechanical trimmers in new designs
• Permanent factory PCB setting applications
• Transducer adjustment for pressure, temperature, and optical sensors
• RF amplifier biasing and gain control

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified suppliers. Confirm that the received parts match the specific BRMZ50 suffix for 50 kΩ resistance and MSOP-10 packaging. Check datasheet revisions and automotive qualification status if required by the application environment. Ensure proper ESD handling procedures are followed during storage and assembly due to the sensitivity of the CMOS input structures.

Selection Notes

Select the AD5162BRMZ50 when a dual-channel solution with 50 kΩ nominal resistance is required. This model is suitable for applications needing volatile memory where power is continuously applied to retain settings, or where a power-on midscale default is beneficial. Compare against the AD5162BRMZ100 for 100 kΩ requirements or the AD5161 series if I2C compatibility is needed instead of SPI. Ensure the system voltage stays within the 2.7 V to 5.5 V range to maintain specified electrical characteristics.

Part Context

The AD5162BRMZ50 belongs to the AD5162 family of dual 256-position digital potentiometers. It shares the same functional block diagram and interface protocol as other variants in the series, differing primarily in the end-to-end resistance value indicated by the ordering suffix. The 'BRMZ' designation specifies the industrial temperature grade and MSOP-10 package type. This component serves as an electronic alternative to mechanical potentiometers, enabling automated calibration and remote adjustment capabilities in embedded systems.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the AD5162BRMZ100 (100 kΩ), AD5162BRMZ50-RL7 (reel packaging), and AD5162BRMZ2K5 (2.5 kΩ). For single-channel applications, the AD5161 series offers similar performance with I2C/SPI options. Verify that any replacement maintains the required 50 kΩ resistance and SPI timing specifications.