AD7150BRMZ

Overview

The AD7150BRMZ is a capacitance-to-digital converter designed for capacitive proximity sensing applications. It features two independent input channels with a conversion rate of 200 S/s and 12-bit resolution. The device operates on a 2.7 V to 3.6 V supply, drawing 100 μA typical current. It includes an adaptive threshold algorithm, a 2-wire serial interface (I2C compatible), and outputs in a 10-lead MSOP package.

Feature Summary

• Integrates an adaptive environmental compensation algorithm that dynamically adjusts thresholds to ignore slow changes caused by humidity or temperature variations while detecting fast proximity events.
• Provides two independent capacitance input channels with integrated excitation sources and programmable CAPDACs to balance large sensor offset capacitances.
• Supports dual operational modes: standalone operation with fixed power-up settings for immediate detection, or microcontroller interfacing via a serial interface for user-defined configuration.

Applications

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

Procurement Notes

Verify the specific suffix BRMZ indicates the commercial temperature range and tube packaging format as documented in the manufacturer's ordering guide. Confirm RoHS compliance status through official datasheets before finalizing component selection for production assemblies.

Selection Notes

Select this component when designing systems requiring ultralow power consumption for battery-operated proximity sensors. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range and utilizes the I2C-compatible serial interface for configuration if dynamic threshold adjustments are required.

Part Context

This part belongs to the AD7150 family of capacitance converters from Analog Devices. It serves as the dual-channel counterpart to the single-channel AD7151, offering higher integration for complex sensing layouts while maintaining the same ultra-low power architecture and signal processing capabilities.

Replacement Considerations

The AD7151 is the single-channel alternative within the same product family. Verify pin compatibility and channel requirements before substitution, as the AD7151 lacks the second independent input channel found in the AD7150BRMZ.