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AD7153:  12-Bit Capacitance-to-Digital Converter (1 Capacitance Input Channel)

Product Details


The AD7152/AD7153 are 12-bit sigma-delta (Σ-Δ) capacitance-to-digital converters (CDCs). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high resolution (12-bit no missing codes, up to 12-bit effective resolution) and high linearity (±0.05%). The AD7152/AD7153 have four capacitance input ranges per operation mode, ±0.25 pF to ±2 pF in differential mode and 0.5 pF to 4 pF in single-ended mode.

The AD7152/AD7153 can accept up to 5 pF common-mode capacitance (not changing), which can be balanced by a programmable on-chip, digital-to-capacitance converter (CAPDAC).

The AD7153 has one capacitance input channel, while the AD7152 has two channels. Each channel can be configured as single-ended or differential. The AD7152/AD7153 are designed for floating capacitive sensors.

The AD7152/AD7153 have a 2-wire, I2C®-compatible serial interface. Both parts can operate with a single power supply from 2.7 V to 3.6 V. They are specified over the temperature range of −40°C to +85°C and are available in a 10-lead MSOP package.

Applications

  • Automotive, industrial, and medical systems for
    Pressure measurement
    Position sensing
    Level sensing
    Flowmeters
    Humidity sensing
  • Data Sheet, Rev. 0, 5/08

    FEATURES and BENEFITS

    Capacitance-to-digital converters

    • Interfaces to floating sensors
    • Resolution down to 0.25 fF (that is, up to 12 ENOB)
    • Linearity: 0.05%
    • Common-mode (not changing) capacitance up to 5 pF
    • Internal clock oscillator
    • 2-wire serial interface (I2C-compatible)
    • Power 2.7 V to 3.6 V single-supply operation 100 μA current consumption
    • See Data Sheet for Additional Information

    Functional Block Diagram for AD7153

    Documentation

    Title Content Type File Type
    AD7152/AD7153: 12-Bit Capacitance-to-Digital Converter Data Sheet (Rev 0, 05/2008) (pdf, 474 kB) Data Sheets PDF
    Webcast: Design And Develop Innovative And Robust Touch Sensor Interfaces Using Capacitive-To-Digital Converters
    This Webcast will focus on the design and development of CDC-based touch sensors and their application, cite CDC product examples such as the AD7142, and explore development tools provided by ADI.
    Webcasts WEBCAST
    MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
    2008 Medical Solution Profile  (pdf, 126 kB)
    High Performance ICs for Medical Imaging, Patient Monitoring, and Instrumentation
    Overview PDF
    AD7150 Capacitance Converter for Proximity Sensing  (pdf, 1907 kB) Overview PDF
    What are Capacitive Sensors and how are they used? FAQs/RAQs HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    AD7152 IIO Capacitance to Digital Converter Linux Driver Device Drivers HTML

    Evaluation Kits & Symbols & Footprints

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    SampleSample & Buy

    Price, packaging, availability

    AD7153 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD7153BRMZ Status: Production 10 ld MSOP 10 Ind Tube, 50 $2.07 $1.77 Y  Material Info PCN Purchase Sample
    AD7153BRMZ-REEL Status: Production 10 ld MSOP 10 Ind Reel, 3000 - $1.77 Y  Material Info PCN Purchase
    Price Table Help

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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