AD7153BRMZ

Overview

The AD7153BRMZ is a 12-bit sigma-delta capacitance-to-digital converter (CDC) from Analog Devices, housed in a 10-lead MSOP package. It features a single differential or single-ended capacitive input channel with selectable ranges of ±0.25 pF to ±2 pF and 0.5 pF to 4 pF. The device operates on a single 2.7 V to 3.6 V supply, consuming approximately 100 μA. It integrates an internal clock oscillator, voltage reference, and a programmable digital-to-capacitance converter (CAPDAC) capable of balancing up to 5 pF of common-mode capacitance. Data is accessed via a 2-wire I²C-compatible serial interface.

Feature Summary

• 12-bit resolution with no missing codes and ±0.05% linearity
• Single-channel architecture with configurable differential or single-ended inputs
• Programmable CAPDAC for common-mode capacitance cancellation 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 suffix 'BRMZ' corresponds to the industrial temperature range (-40°C to +85°C) and MSOP-10 packaging as defined in the official ordering guide. Confirm that the component is sourced directly from Analog Devices or authorized distributors to ensure authenticity and compliance with RoHS standards.

Selection Notes

Select the AD7153BRMZ when a single-channel capacitance measurement is required. For dual-channel applications requiring identical specifications, the AD7152 variant should be considered instead. Ensure the system design accommodates the 2-wire I²C interface requirements, including necessary pull-up resistors for the SDA and SCL lines.

Part Context

This component belongs to the AD7152/AD7153 family of high-resolution capacitance-to-digital converters. While the AD7152 provides two independent channels, the AD7153 offers a cost-effective solution for single-channel designs. Both share the same core architecture, pinout compatibility regarding power and communication, and performance characteristics.

Replacement Considerations

The AD7152BRMZ serves as a functional substitute if additional channel capacity is acceptable. No other direct cross-model replacements are documented in the provided datasheet.