AD7152BRMZ-REEL

Overview

The AD7152BRMZ-REEL is a 12-bit sigma-delta capacitance-to-digital converter (CDC) manufactured by Analog Devices Inc. It features two independent channels, each configurable for single-ended or differential capacitive inputs. The device operates on a single 2.7 V to 3.6 V supply with typical current consumption of 100 μA. It integrates an internal clock oscillator and voltage reference, communicating via a 2-wire I²C-compatible serial interface. Key specifications include ±0.05% linearity, up to 12 effective number of bits (ENOB), and tolerance for parasitic capacitance to ground up to 50 pF.

Feature Summary

• Dual-channel architecture supporting both single-ended and differential modes
• High resolution with 12-bit no missing codes and up to 12 ENOB
• Integrated CAPDAC for balancing common-mode capacitance up to 5 pF
• I²C-compatible 2-wire serial interface with auto-incrementing address pointers

Applications

• Pressure measurement systems
• Position sensing applications
• Level sensing devices
• Flowmeters
• Humidity sensing instruments

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm that the specific revision matches the Rev. A datasheet requirements for register addresses and timing parameters. Ensure the operating environment stays within the specified -40°C to +85°C temperature range for guaranteed performance.

Selection Notes

Select this component over the AD7153 if dual-channel capability is required for simultaneous or multiplexed measurements. Consider the ±0.05% integral nonlinearity and 100 μA power consumption for precision low-power designs. Verify that the system can accommodate the 5 ms to 60 ms conversion times based on the selected oversampling ratio and mode.

Part Context

This part belongs to the AD7152/AD7153 family of capacitance-to-digital converters designed for floating capacitive sensors. It shares architectural similarities with other sigma-delta CDCs but offers specific channel counts and calibration features. The MSOP-10 package allows for compact integration in space-constrained industrial and automotive modules.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.