Audio Codec '97

AC ‘97 Component Specification Revision 2.3 Rev 1.0
105
sine wave; Sample Frequency = 48 kHz; 0 dB = 1Vrms, 10KΩ/50pF load, Testbench Characterization BW: 20 Hz –
20 kHz, 0 dB attenuation; tone and 3D disabled)
Parameter Min Typ Max Units
Full Scale Input Voltage:
Line Inputs
Mic Inputs
1
-
-
1.0
0.1
-
-
Vrms
Full Scale Output Voltage:
Line Output
Headphone Output
-
-
-
-
1.0
-
-
-
1.41
Vrms
Analog S/N:
CD to LINE_OUT
Other to LINE_OUT
90
-
-
85
-
-
dB
Analog Frequency Response
2
20 - 20,000 Hz
Digital S/N
3
D/A
A/D
85
75
90
80
-
-
dB
Total Harmonic Distortion:
Line Output
4
Headphone Output
5
-
-
-
-
0.02
1.0
%
D/A & A/D Frequency Response
6
20 - 19,200 Hz
Transition Band 19,200 - 28,800 Hz
Stop Band 28,800 -  Hz
Stop Band Rejection
7
-74 - - dB
Out-of-Band Rejection
8
- -40 - dB
Group Delay - - 1 ms
Power Supply Rejection Ratio (1 kHz) - -40 - dB
Crosstalk between Inputs channels - - -70 dB
Spurious Tone Reduction - -100 - dB
Attenuation, Gain Step Size
9
- 1.5 - dB
Input Impedance 10 - - kΩ
Input Capacitance - 7.5 - pF
Vrefout - 2.25-2.75 - V
Table 65. AC ‘97 analog performance characteristics
Notes:
(1) With +20 dB Boost on, 1.0 Vrms with Boost off
(2) ±1dB limits
(3) The ratio of the rms output level with 1 kHz full scale input to the rms output level with all zeros into the
digital input.
Measured "A wtd" over a 20 Hz to a 20 kHz bandwidth. (AES17-1991 Idle Channel Noise or EIAJ CP-307 Signal-
to-noise Ratio).
(4) 0 dB gain, 20 kHz BW, 48 kHz Sample Frequency