• ADR445 Trim Pin Voltage range and design

    Can I get a more detailed schematic/ design description focusing on the TRIM pin and it's interaction with the output?

    I'm looking at driving the TRIM pin with an Op-Amp and would like to get a better understanding of acceptable voltage ranges…

  • 请问ADR445 输出5V-7V的锯齿波是哪里有问题呢


  • ADR445的输出为5.9V左右?


    我用ADR445做5V的参考基准,它的电路是按照数据手册提供的基本电路画的,输入端两个去耦电容(10uF 和0.1uF),输出端一个0.1uF电容。输入是电池提供的9V(实测8V到9V间),但是输出是5.9V左右,这与标定的5V输出相差太远了我的芯片是申请的样片,两片我都试过,都是这个输出。我也是试过用12V的线性电源,输出也是5.9V左右


  • 请问ADR445输出怎么是5.9V左右,ADR441输出怎是3.6V左右?




  • RE: AD5791 EVM

    1. EVAL-SDP-CB1Z 控制板

    2. EVAL-AD5791SDZ AD5791评估板

    3. EV-ADR445-REFZ, EV-LTZ1000-REFZ, EV-LTC6655-REFZ, 参考基准源根据自己性能需要任选其一。

  • recommended ADC driver, external reference and reference buffer options?

    What are the recommended ADC driver, external reference and reference buffer


    The AD7961 datasheet recommended ADC drivers are the two single-ended op amps
    ADA4899-1 and AD4897-1 or differential amplifier ADA4932-1. The low-noise,

  • RE: EVAL-AD5781 Schematic and Layout Error

    Ah yes, thanks! In that case the layout is correct. Must be something else in my setup. 

    I'm using the EVM without the software. Accessing SPI through J12. Using external controller for SPI master. 

    Powered by external 5V through J11. Using ADR445 reference…

  • RE: AD7787 AIN2 input voltage range


    For the family of low noise, low drift and high accuracy references you may check this: ADR445, ADR4550.

    But I guess there's also good references with LTC products. I'd suggest ask someone from Voltage References - EngineerZone (analog.com) as…

  • Comment on ADR445 User Trim Model LTSpice

    I found LT1021-5 model in LTSpice with similar functionality to ADR445, although I'm not sure how closely they may be design-wise internally. With this model simulation results are very close to what I measure on the board.