• Does the pad on the AD7143 CDAC chip have to be grounded?

    Hi,

    Does the pad on the underside of the AD7143 (QFN-like package) have to be grounded for the IC to work?

    I have connected everything up except this pad, and the chip won't respond over I2C (no acknowledge bit).

    Cheers, Geo

  • 能读取AD7143的设备ID号，却无法正确读取其AD采集的数据。

    RT，目前AD7143的IIC操作没有问题，读取其设备号也正常，但读回来的通道采集数据全部是0,。

    之前有块板子能够读取数据，但是每次上电前必须用烙铁刮一下AD7143的引脚方能读回正确数据。

    希望有过经验的朋友能指点下。

  • LDC - AD7147 Eval-Board

    Q 

    When we connected an AD7143-1 externally to AD7147-1 evaluation board (instead
    of AD7147-1), we noticed an automatic change in configuration/ID register of
    EEPROM. When we reconnected AD7147-1 (instead of AD7143-1) the configuration/ID …

  • RE: Using multiple AD7746 for liquid level sensing

    Please refer to the following notes 

    AN-854 Sensor PCB Design Guidelines for the AD7142 and AD7143 Capacitance-to-Digital Converters Application Note (Rev. A) (analog.com)

    AN-925 (analog.com)

    AN-957 Layout Guidelines for the AD7147 and AD7148 CapTouch…

  • RE: ADD7746 - Testing/Measuring Multiple CDCs Simultaneously?

    Hi Allan,

    Sorry for the delay in getting back to you.  If you need multiple sensor inputs then have you considered maybe the AD7142 or AD7143 parts?  These parts have multiple sensor inputs so they would reduce the need to use multiple AD7746 chips.

    …

  • RE: Two capacitive input for AD7747

    Hello Idowu,

    The AD7746 cannot be used for single electrode sensing; shorting the Excitation pins to the CIN pins will saturate the readings of the sensor.

    The AD7747 is the only single ended device in this family, but you could look at the CapTouch…

  • RE: Any option for shielding with AD7746?

    Hi,

    Basically I want to oscillate my sensors so they only detect objects on only one of their sides, not both. Something as what is shown in this pdf in section 2.1 http://www.ti.com/lit/an/snoa926a/snoa926a.pdf

    When I say "other capacitive converters…

  • RE: Looking for a AD7152 replacement

    Hi

    there are couple of parts that provide more number of channels but they are limited to applications such as single electrode capacitance sensors or have touch sensor type of applications.

    http://www.analog.com/en/products/analog-to-digital-converters…

  • Mux for Cap-to-D converter

    Hi All,

     

    For a project, I want to differentially sense multiple capacitive channels (non-touch application), and I am thinking of using 6-7 units of the AD7143 chipset. I was wondering if anybody knew a good multiplexer to switch between these chips…

  • Driving AD7150 as a slave via I2C

    Hi All,

    I am trying to figure out how to control my AD7150 eval board using an external microcontroller (Cypress PSOC 4 Pioneer dev. kit). Does anyone have a step-by-step solution to do this, preferably with application code in the C programming language…