STAC9250 Datasheet, PDF (14/137 Pages) Integrated Device Technology – TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES

STAC9250/9251
TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES
PC AUDIO
Parameter
Attenuation, Gain Step Size ANALOG
Attenuation, Gain Step Size DIGITAL
Input Impedance
Input Capacitance
VREFout
VREF
Interchannel Gain Mismatch ADC
Interchannel Gain Mismatch DAC
Gain Drift
DAC Offset Voltage
Deviation from Linear Phase
All Analog Outputs Load Resistance
All Analog Outputs Load Capacitance
HEADPHONE_OUT Load Resistance
HEADPHONE_OUT Load Capacitance
Mute Attenuation
PLL lock time
PLL (or HD Audio Bit CLK) 24.576 MHz clock jitter
Min
Typ
Max Unit
-
1.5
-
dB
-
0.75
-
dB
-
50
-
KW
-
15
-
pF
-
0.5 X AVdd
-
V
-
0.45 X AVdd 0.5
V
-
-
0.5
dB
-
-
-
dB
-
100
- ppm/ºC
-
5
10
mV
-
10
1
deg.
-
10
-
KΩ
-
-
50
pF
-
32
-
Ω
-
100
-
pF
-
-
-
dB
-
96
200 µsec
-
100
300 psec
1. With +30dB Boost on, 1.00 Vrms with Boost off.
2. Ratio of Full Scale signal to noise output with -60dB signal, measured “A weighted” over a 20 Hz to a 20 KHz
bandwidth.
3. ± 1dB limits for Line Output & 0dB gain, at -20dBV
4. Amplitude of THD+N, measured with A-weighting filter, over 20 Hz to 20 KHz bandwidth.
5. Ratio of Full Scale signal to idle channel noise output is measured “A weighted” over a 20 Hz to a 20 KHz
bandwidth. (AES17-1991 Idle Channel Noise or EIAJ CP-307 Signal-to-noise Ratio).
6. Peak-to-Peak Ripple over Passband meets ± 0.25dB limits, 48 KHz Sample Frequency.
7. Stop Band rejection determines filter requirements. Out-of-Band rejection determines audible noise.
8. The integrated Out-of-Band noise generated by the DAC process, during normal PCM audio playback, over a
bandwidth 28.8 to 100 KHz, with respect to a 1 Vrms DAC output.
2.4. STAC9250/9251 4V Analog Performance Characteristics
If you are interested in using the STAC9250/9251 at 4V Analog, please contact IDT for more infor-
mation.
2.5. STAC9250/9251 3.3V Analog Performance Characteristics
If you are interested in using the STAC9250/9251 at 3.3V Analog, please contact IDT for more infor-
mation.
IDT™
14
TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES
STAC9250/9251
V 1.1 102706