AD7152BRMZ

Overview

The AD7152BRMZ 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 operation. The device operates on a single 2.7 V to 3.6 V supply with typical current consumption of 100 μA. Key electrical specifications include integral nonlinearity of ±0.05%, up to 12 effective number of bits (ENOB), and selectable input ranges from ±0.25 pF to ±2 pF in differential mode. It utilizes an internal clock oscillator and communicates via a 2-wire I²C-compatible serial interface.

Feature Summary

• Two-channel architecture supporting floating capacitive sensors
• High resolution with 12-bit ENOB and ±0.05% linearity
• Programmable CAPDAC for common-mode capacitance balancing up to 5 pF
• Tolerant of parasitic capacitance to ground up to 50 pF

Applications

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

Procurement Notes

Verify the specific ordering suffix BRMZ corresponds to the MSOP-10 package and industrial temperature range (-40°C to +85°C). Confirm that the component is sourced directly from Analog Devices or authorized distributors to ensure authenticity. Check for RoHS compliance documentation as required by regional regulations.

Selection Notes

Select the AD7152BRMZ when dual-channel capacitance monitoring is required. Ensure the application involves floating sensors compatible with the device's excitation outputs. Verify that the system power supply remains within the 2.7 V to 3.6 V range. Consider the 100 μA active current consumption against battery life requirements if applicable.

Part Context

The AD7152BRMZ belongs to the AD715x family of capacitance-to-digital converters. It shares architectural similarities with the AD7153 but provides two channels instead of one. Both devices utilize sigma-delta modulation for high-resolution conversion and are designed for precision sensor interfaces requiring low noise and high linearity.

Replacement Considerations

The AD7153BRTZ is a single-channel variant within the same family. Direct substitution requires verifying channel count requirements. Other generic CDCs may lack the integrated CAPDAC or specific linearity specifications.