CS4297 datasheet(4/46 Pages) CIRRUS

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DS242F5

CS4297

CrystalClear™ SoundFusion™ Audio Codec ’97

ANALOG CHARACTERISTICS (Standard test conditions unless otherwise noted: T

ambient = 25° C,

AVdd = 5.0 V ±5%, DVdd = 3.3 V ±5%; 1 kHz Input Sine wave; Sample Frequency, Fs = 48 kHz; ZAL=10 kΩ/680

pF load CDL = 18 pF load (Note 1); Measurement bandwidth is 20 Hz - 20 kHz, 18-bit linear coding; Mixer registers

set for unity gain.

Notes: 1. ZAL refers to the analog output pin loading and CDL refers to the digital output pin loading.

2. Parameter definitions are given in the

Parameter and Term Definitions section.

3. Path refers to the signal path used to generate this data. These paths are defined in the

Parameter and

Term Definitions section.

4. This specification is guaranteed by silicon characterization, it is not production tested.

Parameter

(Note 2)

Symbol

Path

(Note 3)

CS4297-KQ

CS4297-JQ

Unit

Min

Typ

Max

Min

Typ

Max

Full Scale Input Voltage

Line Inputs

Mic Inputs

(20 dB=0)

Mic Inputs

(20 dB=1)

A-D

0.91

0.091

1.00

0.10

0.91

0.091

1.00

0.10

VRMS

Full Scale Output Voltage

Line,Alternate Line, and Mono Outputs

D-A

0.91

1.0

1.13

0.91

1.0

1.13

VRMS

Frequency Response

(Note 4)

Analog

Ac = ± 0.5 dB

DAC

Ac = ± 0.5 dB

ADC

Ac = ± 0.5 dB

A-A

D-A

A-D

20,000

Dynamic Range

Stereo Analog inputs to LINE_OUT

Mono Analog inputs to LINE_OUT

DAC Dynamic Range

ADC Dynamic Range

A-A

D-A

A-D

dB FS A

DAC SNR (-20 dB FS input w/

CCIR-RMS filter on output)

SNR

D-A

Total Harmonic Distortion + Noise

(-3 dB FS input signal):

Line/Alternate Line Output

DAC

ADC

(all inputs except phone/mic)

ADC

(phone/mic)

THD+N

A-A

D-A

A-D

-94

-86

-87

-80

-74

dB FS A

Power Supply Rejection Ratio

(1 kHz, 0.5 VRMS w/ 5 V DC offset)(Note 4)

Interchannel Isolation

Spurious Tone

(Note 4)

-100

dB FS

Input Impedance

(Note 4)

Ω

External Load Impedance

Ω

Output Impedance

(Note 4)

730

Ω

Input Capacitance

(Note 4)

Vrefout

2.0

2.3

2.5

2.0

2.3

2.5

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