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LMK03000: Effect of connecting Bias pin to GND

Part Number: LMK03000

Hi Team,

Our customer shorted the BIAS pin to GND with a bypass capacitor and found that this pin should be connected to VCC.
Since the datasheet has limited information for bias pin, is there a longer effect in device performance if the bias pin is still connected to GND?

Thanks,

Jonathan

  • Hello Jonathan,

    The purpose of a bias pin is to make sure a signal is offset to the proper voltage range. The LVDS driver for instance could be providing a DC bias to the LVDS receiver not requiring the receiver to internally bias this voltage. If the LVDS driver is AC biased the bias voltage would be required from the receiver side, if this is grounded the device would not operate correctly and possibly be pulling voltage lower than the Absolute Minimum voltage specification.

    Please advise customer to tie this connection to VCC through low leakage 1 uF capacitor as stated in section 6.1 Bias Pin.