1. Products
  2. A/D Converters (ADC)
  3. Integrated/Special Purpose A/D Converters
  4. Capacitive-to-Digital and Touch Screen Controllers
  5. AD7156

Data Sheet Rev. 0
PDF
Device Drivers
3 View All

Overview

Features and Benefits

  • Ultralow power
    Power supply voltage: 1.8 V to 3.6 V
    Operation power supply current: 70 μA typical
    Power-down current: 2 μA typical
  • Fast response time
    Conversion time: 10 ms per channel
    Wake-up time from serial interface: 300 μs
  • Adaptive environmental compensation
  • 2 capacitance input channels
    Sensor capacitance (CSENS): 0 pF up to 13 pF
    Sensitivity up to 3 fF
  • 2 modes of operation
    Standalone with fixed settings
    Interfaced to a microcontroller for user-defined settings
  • 2 detection output flags
  • 2-wire serial interface (I2C-compatible)
  • Operating temperature: −40°C to +85°C
  • 10-lead LFCSP package (3 mm × 3 mm × 0.8 mm)

Product Details

The AD7156 delivers a complete signal processing solution for capacitive sensors, featuring an ultralow power converter with fast response time.

The AD7156 uses an Analog Devices, Inc., capacitance-to-digital converter (CDC) technology, which combines features important for interfacing to real sensors, such as high input sensitivity and high tolerance of both input parasitic ground capacitance and leakage current.

The integrated adaptive threshold algorithm compensates for any variations in the sensor capacitance due to environmental factors like humidity and temperature or due to changes in the dielectric material over time.

By default, the AD7156 operates in standalone mode using the fixed power-up settings and indicates detection on two digital outputs. Alternatively, the AD7156 can be interfaced to a micro-controller via the serial interface, the internal registers can be programmed with user-defined settings, and the data and status can be read from the part.

The AD7156 operates with a 1.8 V to 3.6 V power supply. It is specified over the temperature range of −40°C to +85°C.

Applications

  • Buttons and switches
  • Proximity sensing
  • Contactless switching
  • Position detection
  • Level detection
  • Portable products

Product Categories

Markets and Technologies

Comparable Parts Click to see all in Parametric Search

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Documentation & Resources

  • View All (6)
  • Evaluation Design File (1)
  • Data Sheet (1)
  • Application Note (1)
  • Frequently Asked Question (1)
  • Technical Article (1)
  • Webcast (1)
    • Document Type
    Frequently Asked Question

    Software & Systems Requirements

    FPGA/HDL

    WIKI

    AD7156 Pmod Xilinx FPGA Reference Design

    Device Drivers

    WIKI

    AD7156 - No-OS Driver for Renesas Microcontroller Platforms
    WIKI

    AD7156 - No-OS Driver for Microchip Microcontroller Platforms
    WIKI

    AD7150 IIO Capacitance to Digital Converter Linux Driver

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    AD7156BCPZ-REEL Material Declaration Reliability Data 10-Lead LFCSP (3mm x 3mm)
    AD7156BCPZ-REEL7 Material Declaration Reliability Data 10-Lead LFCSP (3mm x 3mm)
    Wafer Fabrication Data

    Support & Discussions

    AD7156 Discussions

    RE: Eval AD7156 integrating with arduino uno
    RE: AD7150 /AD7156
    All AD7156 Discussions
    AD7156 Contact ADI Technical Support »
    AD7156 Ask your question »
    AD7156 Contact ADI Technical Support » AD7156 Ask your question »

    Sample & Buy


    Ordering FAQs


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    Buy Now Pricing


    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.

     

    List Pricing


    (*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

     

    Lead Times


    Please see the latest communication from our CCO regarding lead times.

     

    Sampling


    A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


    Price Table Help

     

    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

    •