CS4297
CrystalClear™ SoundFusion™ Audio Codec ’97
ANALOG CHARACTERISTICS (Standard test conditions unless otherwise noted: Tambient = 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.
CS4297-KQ
CS4297-JQ
Parameter
(Note 2)
Symbol Path Min Typ Max Min Typ Max
(Note 3)
Unit
Full Scale Input Voltage
Line Inputs
VRMS
VRMS
VRMS
A-D
A-D
0.91 1.00
0.91 1.00
-
-
-
0.91 1.00
0.91 1.00
0.091 0.10
-
-
-
Mic Inputs
Mic Inputs
(20 dB=0)
(20 dB=1)
A-D 0.091 0.10
Full Scale Output Voltage
Line,Alternate Line, and Mono Outputs
VRMS
D-A
0.91 1.0
1.13 0.91 1.0
1.13
Frequency Response
Analog
DAC
(Note 4)
FR
DR
Ac = ± 0.5 dB
Ac = ± 0.5 dB
Ac = ± 0.5 dB
A-A
D-A
A-D
20
20
20
-
-
-
20,000 20
20,000 20
20,000 20
-
-
-
20,000
20,000
20,000
Hz
Hz
Hz
ADC
Dynamic Range
Stereo Analog inputs to LINE_OUT
Mono Analog inputs to LINE_OUT
DAC Dynamic Range
A-A
A-A
D-A
A-D
90
85
85
85
95
90
90
90
-
-
-
-
-
-
-
-
90
85
87
85
-
-
-
-
dB FS A
dB FS A
dB FS A
dB FS A
ADC Dynamic Range
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
DAC
THD+N A-A
-
-
-
-
-94
-86
-87
-87
-80
-80
-80
-74
-
-
-
-
-
-
-
-
-74 dB FS A
-74 dB FS A
-74 dB FS A
-74 dB FS A
D-A
A-D
A-D
ADC
ADC
(all inputs except phone/mic)
(phone/mic)
Power Supply Rejection Ratio
(1 kHz, 0.5 VRMS w/ 5 V DC offset)(Note 4)
40
70
-
60
87
-100
-
-
-
-
40
87
-100
-
-
dB
dB
Interchannel Isolation
-
-
Spurious Tone
(Note 4)
(Note 4)
-
-
-
dB FS
kΩ
Input Impedance
External Load Impedance
Output Impedance
Input Capacitance
Vrefout
10
10
-
-
-
10
10
-
-
-
-
-
kΩ
(Note 4)
(Note 4)
730
5
-
730
5
-
Ω
-
-
-
-
pF
2.0
2.3
2.5
2.0
2.3
2.5
V
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.
4
DS242F5
CIRRUS [ CIRRUS LOGIC ]
