• ADN8834 Cooling Mode Issue

    I am evaluating the performance of the ADN8834 using the EVAL-ADN8834 kit with the ADN8834CB-EVALZ daughter board. I have been referencing the UG-858 document whilst doing the evaluation. My DUT is a TOSA (transmitter optical sub-assembly), which is essentially…

  • ADN8834 TMPGD function

    Hi 

    I have some questions about ADN8834 TMPGD:

    1.What 's the default voltage logic of TMPGD, is low correct ?

    2.From ADN8834 DS(REV.B page 5) TEMPERATURE GOOD High Threshold 1.54V, does it means  if TMPGD reaches (UP)1.54V then it's logic will become…

  • adn8834

    Hi,

    I had some problems testing the PCB board made by ADN8834 and hope you can help with it.

    I made PCB boards based on the ADN8834CP-EVALZ evaluation board schematic,and with NTC, no TEC, Vvtec was at 1.25V. stating that LDR and SFB have no output and…

  • ADN8834

    你好,

    我在测试ADN8834制作的PCB板时遇到了一些问题,希望你能给与帮助。

    我根据ADN8834CP-EVALZ评估板原理图制作PCB板,在加上NTC,没加TEC时,Vvtec一直处于1.25V.说明LDR和SFB无输出,事实也是这样 。

    但是实际Vout1输出是根据NTC阻值变化的,Vout2也是在变化的。根据

    LDR和SFB应该是有输出的,同时我检查了VDD输入是5V。

    我不明白没有输出是什么原因。你能帮助我吗

  • TMPGD of ADN8834

    Is TmpGD a pulse or a held voltage when Vout1 reaches TempSet?

  • ADN8834 Calc RC and RV for V and I limits of TEC

    UG-858  has table 1 on page 3 to calculate RV1 and RV2, but sets abitraily RV2=10k which doen't work for most TECs.

    Similarly table 2 on page 4 shows RC1 and RC2 for pre-established current ratio.

    Equation for flexible V and I ratio shall be supplied…

  • ADN8834能支持单向TEC吗?

    你好,

           TEC制冷片供电3.3V,1.5A,不能加热,一端要求接地。制冷片集成了NTC,目标温度是0℃。不知ADN8834是否支持这种类型的TEC

     

  • Question Regarding ADN8834s Chopper1 Amplifier Output

    Hello,

    I am having trouble getting the ADN8834 to work as expected, and the cause appears to be coming from the Chopper1 amplifier. I am controlling the temperature by applying various voltages on the IN2P pin and OUT1 locks to this voltage; however,…

  • RE: ADN8834 Custom Design Issues

    1kohm for the low pass resistance to AVDD is rather large for the current.  The low pass filter in the reference design uses a 10ohm.  All the reference voltage divider networks are powered from AVDD through the low pass and you may not have enough headroom…

  • ADN8834的模拟控制方式和数字控制方式

    在模拟控制方式中,PID控制完全在于Chopper2 amplifer中对吗?

    在数字控制方式中,PID控制由外部数字控制器实现的对吗? ADN8834本身不含有数字控制器?