CS4525 datasheet(19/91 Pages) CIRRUS

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DS726A1

CS4525

ANALOG INPUT CHARACTERISTICS

Test Conditions (unless otherwise specified): Input Signal: 1 kHz sine wave through the recommended passive

input filter shown in Figure 27 on page 56; Sample Frequency = 48 kHz, 10 Hz to 20 kHz Measurement Bandwidth.

Power outputs in power-down state (PDnOut1 = 1, PDnOut2 = 1, PDnOut3/4 = 1).

Notes:

Referred to the typical full-scale voltage.

Measured between AINx and AGND.

ADC DIGITAL FILTER CHARACTERISTICS

Notes:

Filter response is clock dependent and scales with the ADC sampling frequency (Fs). With a

27.000 MHz or 24.576 MHz XTAL/SYS_CLK, Fs is equal to the applied clock divided by 512. With an

18.432 MHz XTAL/SYS_CLK, Fs is equal to the applied clock divided by 384.

Parameter

Min

Typ

Max

Unit

Analog In to ADC

Dynamic Range (Note 4)

A-weighted

unweighted

Total Harmonic Distortion + Noise

-1 dB

-20 dB

-60 dB

-88

-75

-35

-82

DC Accuracy

Interchannel Gain Mismatch

0.1

Gain Drift

±100

ppm/°C

Input

Interchannel Isolation

Full-scale Input Voltage

1.96

2.18

2.40

Vpp

Input Impedance

(Note 5)40

Ω

Parameter

Min

Typ

Max

Unit

Passband (Frequency Response) (Note 6)

to -0.1 dB corner

0.4948

Passband Ripple

-0.09

Stopband

(Note 6)

0.6677

Stopband Attenuation

48.4

Total Group Delay

2.7/Fs

High-Pass Filter Characteristics

Frequency Response

-3.0 dB

-0.13 dB

3.7

24.2

Phase Deviation

20 Hz

Deg

Passband Ripple

0.17

Filter Settling Time

-105/Fs

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