User Manual

DS899F1 14

CS4234

ADC DIGITAL FILTER CHARACTERISTICS

Test Conditions (unless otherwise specified): Device configured as shown in Section 2. on page 8. Input sine

wave: 1 kHz; VA_SEL = 0 for VA = 3.3 VDC, 1 for VA = 5.0 VDC.; T

= -40 to +105 C; Measurement Bandwidth is

20 Hz to 20 kHz unless otherwise specified. See filter plots in Section 7. on page 70.

Note:

15. Response is clock dependent and will scale with Fs.

16. The ADC group delay is measured from the time the analog inputs are sampled on the AINx pins to

the FS/LRCK rising transition after the last bit of that group of samples has been transmitted on

SDOUT1.

17. The amount of time from input of half-full-scale step function until the filter output settles to 0.1% of

full scale.

Parameter (Note 15) Min Typ Max Unit

Passband (Frequency Response) to -0.1 dB corner 0 - 0.4535 Fs

Passband Ripple -0.09 - 0.17 dB

Stopband 0.6 - - Fs

Stopband Attenuation 70 - - dB

Single-Speed Mode

ADC Group Delay (Note 16) - 9.5/Fs - s

High-Pass Filter Characteristics (48 kHz Fs)

Frequency Response -3.0 dB

-0.13 dB

Phase Deviation @ 20 Hz - 10 - Deg

Passband Ripple -0.09 - 0.17 dB

Filter Settling Time (Note 17)

25000/Fs

-s

Double-Speed Mode