• AD420: Maximum output current and maximum current absorption

    1) Which is the maximum output current available in voltage mode (0-5V olutput)
    ?
    2) Which is the maximum current absorption from power supply when I put Vcc =
    +15V

     

    1)The voltage output should be loaded by a high impedance only…
  • AD420_external current boost transistor

    I am designing new circuit of out new product and i would like to use AD420.

    But I can not understand external boost function circuit.

    On your datasheet and application note, propose to use NPN transistor by using
    external boost…
  • AD420 4-20ma 输出时,12-20ma总是输出不对

    你好!

           我现在在调试AD420,0-65535输入,4-20ma输出,现在发现个问题,当我输入0-32767范围的时候,对应输出电流4-12ma,这是正确的,但是当我输入32768-65535这个范围的时候,电流输出也是4-12ma。而且当我输入65535的时候输出20ma。接线如下“

  • 关于AD420 电流一直输出4mA的问题。

    你好!

          一直使用的AD420总出现一些不稳定的问题,一直没有解决,现象是输出的电流一直是4mA,有时能正确输出。

  • 请问使用AD420时配置输出0-24mA时,在有电流输出时芯片会发烫,是什么原因?电路如下:

  • RE: AD420一直输出4mA

    如果可以的话我这边可以给你推荐正规的供应商

  • RE: AD 420 interfacing with ATTiny 2313

    Hi,

    Apologies for the delay in repling to this query.

    Can you send on the digital waveforms that are being sent to this part?

    Also a brief description of the mode you wish to set the part up in would be useful.

    The AD5420 is the upgrade part to the…

  • RE: ADI 12位的adc 和DAC转换  有没有?

    对于ADC 12bit 8pin脚的产品,您可以考虑AD7893、AD7895(但是这两款都是外部参考);AD7896是内部参考。

    对于DAC产品,您可以考虑:AD420;AD5320和DAC8512。

  • RE: AD421 Revision History

    Hi Manelous,

    AD420 is quite an old device - as you mention the datasheet revision of year 2000.

    For loop powered designs we are recommending AD5421 to be used in new designs.

    http://www.analog.com/en/digital-to-analog-converters/da-converters/ad5421…

  • RE: 我想做4~20ma电流输出有没有什么好的芯片

    AD420和AD5420是4-20mA输出串行输入DAC,cn0270应用笔记有完整的参考电路。

    http://www.analog.com/media/cn/reference-design-documentation/reference-designs/CN0270_cn.pdf

    AD5748、AD5749、AD5750、AD5750-1、AD5751等都可以讲电压输入转换成4-20mA电流输出,cn0203应用笔记有AD5750-1的完整电路。

    http://www.analog.com…