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TLV320DAC3100-Q1: Input/Output Pin confirm

Xiaoxiang Liu
Expert 7805 points
Part Number: TLV320DAC3100-Q1
Other Parts Discussed in Thread: TLV320DAC3100

Hi team,

We have some issue about TLV320DAC3100, and we did not find an exact description in the spec sheet.

1. Do PIN5, 13, and 14 only need to be connected to the corresponding SOC pins?

If it is not used, do you need to perform up and down processing, or can it be left or floating?

2.  What should be paid attention to when PIN6 and 7 are connected to the SOC? 

3. If PIN27 and 30 are not used, do they need to be pulled up and down, or can they be left floating?

Thanks

Xiaoxiang

  • 0
    TI__Guru** 110815 points

    Hi Xiaoxiang,

    I'll comment on each question below:

    1. Pin 5 [DIN] is the digital input data to DAC3100, so it should be connected to digital output data from SOC. If not used this can be lef floating.
      Pin 13 and 14 (AINx) are analog inputs, these can be connected to analog outputs from SOC. If not used it is recommended to AC couple to GND using capacitors, otherwise leave floating and make sure I2C configuration never configure the analog inputs routed to the DAC.
    2. WCLK and BCLK should be routed as any other clock signal in the system, some applications use series termination resistors; other than that, no special instructions.
    3. Pins 27 and 30 should be left floating if not used, do not pull up or down as this would create a short from the analog outputs.

    Best regards,
    -Ivan Salazar
    Applications Engineer