CS4297 Datasheet, PDF (4/46 Pages) Cirrus Logic – CrystalClear SoundFusion Audio Codec 97

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; Z_AL=10 kΩ/680
pF load C_DL = 18 pF load (Note 1); Measurement bandwidth is 20 Hz - 20 kHz, 18-bit linear coding; Mixer registers
set for unity gain.
CS4297-KQ
CS4297-JQ
Parameter
(Note 2)
Symbol Path Min Typ Max Min Typ Max Unit
(Note 3)
Full Scale Input Voltage
Line Inputs
Mic Inputs
(20 dB=0)
Mic Inputs
(20 dB=1)
A-D 0.91 1.00 - 0.91 1.00 -
A-D 0.91 1.00 - 0.91 1.00 -
A-D 0.091 0.10 - 0.091 0.10 -
V_RMS
V_RMS
V_RMS
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
Analog
DAC
ADC
(Note 4) FR
Ac = ± 0.5 dB
Ac = ± 0.5 dB
Ac = ± 0.5 dB
A-A 20
D-A 20
A-D 20
- 20,000 20
- 20,000 20
- 20,000 20
- 20,000 Hz
- 20,000 Hz
- 20,000 Hz
Dynamic Range
Stereo Analog inputs to LINE_OUT
Mono Analog inputs to LINE_OUT
DAC Dynamic Range
ADC Dynamic Range
DR A-A 90 95
-
A-A 85 90
-
D-A 85 90
-
A-D 85 90
-
-
90
- dB FS A
-
85
- dB FS A
-
87
- dB FS A
-
85
- dB FS A
DAC SNR (-20 dB FS input w/
CCIR-RMS filter on output)
SNR D-A -
63
-
-
-
-
dB
Total Harmonic Distortion + Noise
(-3 dB FS input signal):
Line/Alternate Line Output
THD+N A-A - -94 -80 -
DAC
D-A - -86 -80 -
ADC
(all inputs except phone/mic)
A-D - -87 -80 -
ADC
(phone/mic)
A-D - -87 -74 -
- -74 dB FS A
- -74 dB FS A
- -74 dB FS A
- -74 dB FS A
Power Supply Rejection Ratio
(1 kHz, 0.5 V_RMS w/ 5 V DC offset)(Note 4)
40 60
-
-
40
-
dB
Interchannel Isolation
70 87
-
-
87
-
dB
Spurious Tone
(Note 4)
- -100 -
- -100 - dB FS
Input Impedance
(Note 4)
10 -
- 10 -
-
kΩ
External Load Impedance
10 -
- 10 -
-
kΩ
Output Impedance
(Note 4)
- 730 -
- 730 -
Ω
Input Capacitance
(Note 4)
-
5
-
-
5
-
pF
Vrefout
2.0 2.3 2.5 2.0 2.3 2.5
V
Notes: 1. Z_AL refers to the analog output pin loading and C_DL 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.
4
DS242F5