• RE: ada4254


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  • AD7134 with ADA4254


    My application is to create an 8 channel, synchronously-sampled data acquisition system for signals from +-5mV to +-10V synchronised to an external 40kHz sample clock (and I'm looking at ways to increase that for various performance & spec reasons…

  • ADA4254 /CS pin

    On the ADA4254 the SPI low on SDO/SCK are as expected when driven by Spartan 7 FPGA with around 40KR internal pull-up. They approach GND well.

    However, /CS doesn't go below 500mV. The datasheet spec is OK to 800mV ViL but would prefer more headroom and…

  • ADA4254 Datasheet & DIE_REV_ID


    I've just started evaluating the ADA4254 device using the EVAL kit available from your store.  To make sure my SPI communications are working properly, I've been reading the DIE_REV_ID register and get back 0x30 as a result.

    According to the…

  • ADA4254 ESD immunity and umpowered behavior

    I'm using the ADA4254 in an application that requires IEC 61000-4-2 ESD testing, and I have the following questions:

    1.  During powered operation, is a TVS on each input sufficient to protect the device from an surge event provided that the clamping voltage…

  • AD4005 and ADA4254 with low clock frequency

    Hello everybody,

    I would like to use an AD4005 with an ADA4254. The signals of interest are below 10kHz on a single input, so there is no multiplexing required. The frontend will presumably be rather far away from the PIC, so I would like to keep the…

  • ADA4254 input protection behavior on unused MUX inputs

    If protection is enabled on the ADA4254, it will open the MUX inputs if an overvoltage is detected. For example, if +IN1/-IN1 see an excessive voltage, those mux inputs will be disconnected, protecting the internal amplifier.

    However, what happens when…

  • ADA4254 clock rate for 40kHz ADC sampling (or multiples thereof) - 120/125*1MHz?


    I have evaluated the ADA4254 and I really like it's flexibility. So much so, I'm considering using multiple ADA4254s in the AFE of a system using an AD7606B clocked at 640kHz and using it's oversampling function to yield 40 or 80ksps…

  • ADA4254输入切换模块的建立时间是多少?


  • RE: Considering AD7606B but need more PGA ranges (down to +-20mV)

    Hello Liuis,

    I'm getting to know the ADA4254 - this is a nice device that solves a lot of problems for me. I had it hooked up to the AD7768 eval today and got some very good results.

    However, my challenge will be synchronising the AD7768 to sample…