AD7153BRMZ-REEL

Overview

The AD7153BRMZ-REEL is a 12-bit sigma-delta capacitance-to-digital converter (CDC) from Analog Devices. It features a single differential or single-ended capacitance input channel with selectable ranges of ±0.25 pF to ±2 pF and 0.5 pF to 4 pF, respectively. The device operates on a single 2.7 V to 3.6 V supply, consuming approximately 100 μA. It includes an internal clock oscillator, a programmable digital-to-capacitance converter (CAPDAC) for common-mode balancing up to 5 pF, and tolerance for parasitic capacitance to ground up to 50 pF. 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
• Integrated CAPDAC balances up to 5 pF of common-mode capacitance
• Tolerates up to 50 pF of parasitic capacitance to ground

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. Confirm the BRMZ designation corresponds to the industrial temperature range of −40°C to +85°C and the MSOP-10 package. Ensure the specific revision matches the required datasheet version A specifications.

Selection Notes

Select the AD7153 over the AD7152 when only one capacitance channel is required. Verify that the application requires a maximum of 5 pF common-mode capacitance, as this limit is balanced by the internal CAPDAC. Check if the 100 μA current consumption fits the power budget compared to lower-power alternatives.

Part Context

This component belongs to the AD7152/AD7153 family of capacitance-to-digital converters. The AD7153 variant provides a single channel, whereas the AD7152 offers two channels. Both share identical electrical characteristics, interfaces, and pinouts for the active pins, differing primarily in channel count and unused NC pins.

Replacement Considerations

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