PCM6340-Q1: ADC input bias

Shinji Tsuji

Genius 12978 points

Part Number: PCM6340-Q1

Hi team,

Could you give me PCM6240's ADC input equivalent circuit?

I would like to know how the ADC input is biased. Is it biased from center of AVDD or HVDD?

regards.

over 3 years ago

0 Zak Kaye over 3 years ago

TI__Mastermind 23050 points

Hi Tsuji-san,

The PCM6340 only has a very weak internal bias and it is necessary to externally bias the inputs in both AC coupled and DC coupled modes. Attached is an equivalent input impedance model to help with resistor selection.

Best,

ZakPCM6xx0 Input Impedance.TSC

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PCM6340-Q1: ADC input bias