CS4812 datasheet(4/36 Pages) CIRRUS

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CS4812

DS291PP3

1. CHARACTERISTICS AND SPECIFICATIONS

ADC CHARACTERISTICS (T

A = 25°C; VA, VD = + 5V; -1 dB Full Scale Input Sine wave,

997 Hz; Fs = 48 kHz; XTI = 12.288 MHz (PLL disabled). Measurement Bandwidth is 20 Hz to 20 kHz.)

Notes: 1. Referenced to typical full-scale differential input voltage (2 Vrms).

2. Bench tested only.

3. Filter characteristics scale with output sample rate.

4. Group delay for Fs = 48 kHz, tgd = 15/48 kHz = 313 µs.

5. Measured using differential analog input circuit, see Figure 10.

6. Filter Response is not tested but guaranteed by design.

Parameters

Symbol

Min

Typ

Max

Units

Analog Input Characteristics

ADC Conversion

Stereo Audio channels

Bits

Dynamic Range

(A weighted, Note 5)

(unweighted, Note 5)

100

Total Harmonic Distortion + Noise

(Note 1,5)

(PLL enabled)

(Note 1,2,5)

THD+N

-92

-87

Interchannel Isolation

Interchannel Gain Mismatch

0.1

Offset Error (with high pass filter enabled)

(Note 6)

LSB

Full Scale Input Voltage (Differential)

1.9

2.0

2.1

Vrms

Gain Drift

(Note 2)

100

ppm/°C

Input Resistance

Ω

Input Capacitance

CMOUT Output Voltage

2.3

Common Mode Rejection Ratio

(Note 2)

CMRR

Group Delay (Fs = Output Sample Rate)

(Note 4)

tgd

-15/Fs

Group Delay Variation vs. Frequency

∆tgd

µs

High Pass Filter Characteristics

Frequency Response

-3dB (Note 3)

-0.14dB (Note 3)

3.7

Phase Deviation

@ 20 Hz (Note 3)

Degree

Passband Ripple

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