AD7150BRMZ-REEL

Overview

The AD7150BRMZ-REEL is a capacitance-to-digital converter designed for capacitive proximity sensing applications. It features two independent input channels with a conversion time of 10 ms and operates on a 2.7 V to 3.6 V supply, drawing 100 μA. The device provides sensitivity down to 1 fF and includes adaptive environmental compensation. It utilizes a 10-lead MSOP package and supports an I2C-compatible serial interface for configuration.

Feature Summary

• Integrates adaptive threshold algorithms to compensate for environmental variations such as humidity and temperature changes over time.
• Features programmable CAPDAC to balance high input parasitic capacitance and extend the measurable sensor range.
• Includes built-in excitation sources and slew rate limiting to improve system electromagnetic compatibility.

Applications

• Proximity sensing
• Contactless switching
• Position detection
• Level detection

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the BRMZ variant meets industrial temperature specifications ranging from −40°C to +85°C. Ensure the ordering code matches the Rev. B datasheet requirements for accurate pinout and electrical characteristics.

Selection Notes

Select this component for designs requiring dual-channel capacitive sensing with low power consumption. Consider the AD7151 if only a single channel is needed for reduced power usage. Evaluate the need for microcontroller interfacing versus standalone operation based on the required flexibility for threshold settings.

Part Context

This part belongs to the AD7150 series of capacitance converters manufactured by Analog Devices. It serves as a complete signal processing solution for capacitive sensors, offering high input sensitivity and tolerance to ground capacitance. The device integrates sigma-delta modulation and digital filtering within a compact surface-mount package.

Replacement Considerations

The AD7151 is documented as a single-channel alternative with lower power consumption. Verify pin compatibility and register mapping before substituting models to ensure functional equivalence in existing circuit designs.