PCM1808 integrated antialiasing LPF

Eng Lih Khaw

Expert 2000 points

Other Parts Discussed in Thread: PCM1808

Hi,

I've two question regarding PCM1808:

1) what is the cut-off value for the integrated analog antialias LPF?

2) Regarding the control Pins in section 8.2.2.1 (pg 20 in datasheet), if select “H”, I would need to pull up by 10kohm to VDD. If select “L”, merely directly short to GND (no need 10k pull down resistor to GND). Is my understanding correct?

Could you advise?

over 7 years ago

0 Luis Fernando Rodriguez S. over 7 years ago

TI__Guru* 84915 points

Hi,

The antialiasing filter frequency response is specified in the datasheet ( www.ti.com/.../pcm1808.pdf ). The cutoff frequency is 1.3MHz (- 3dB).

Regarding your question about the control pins, you are correct. To select "H", you would need to pull up by 10kohm to VDD. To select "L", you would need to connect them to GND.

Best regards,
Luis Fernando Rodríguez S.

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PCM1808 integrated antialiasing LPF