STAC9250 datasheet(13/137 Pages) IDT

13 / 137 page

STAC9250/9251

TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES

PC AUDIO

IDT™

STAC9250/9251

V 1.1 102706

TWO-CHANNEL HD AUDIO CODEC WITH MODEM & DUAL DIGITAL MICROPHONE INTERFACES

2.3.

STAC9250/9251 5V Analog Performance Characteristics

(Tambient = 25 ºC, AVdd = 5.0 V ± 5%, DVdd = 3.3 V ± 5%, AVss = DVss = 0 V; 1 KHz input sine wave; Sample

Frequency = 48 KHz; 0dB = 1 VRMS, 10 K

Ω / 50 pF load, Testbench Characterization BW: 20 Hz – 20 KHz, 0dB set-

tings on all gain stages)

Min and Max performance targets are not included here, as specific system characteristics, such as layout, routing and

external CODEC component selection, influence the performance of the CODEC. To receive min/max levels for your

system, please send us a unit and IDT will perform a full audio test suite and provide you with the results. Contact IDT

for more information.

Parameter

Min

Typ

Max

Unit

Full Scale Input Voltage:

All Analog Inputs with out boost

1.00

Vrms

All Analog Inputs with boost (Note 1)

0.03

Vrms

Full Scale Output:

PCM (DAC) to All Analog Outputs

1.00

Vrms

HEADPHONE_OUT (32

Ω load) per channel (peak)

Dynamic Range: -60dB signal level (Note 2)

PCM to All Analog Outputs

All Analog Inputs to A/D (1 VRMS Input Referenced)

Analog Frequency Response (Note 3)

30,000

Total Harmonic Distortion + Noise (-3dB): (Note 4)

PCM to All Analog Outputs

-90

All Analog Inputs to A/D (-3dBV input Level)

-87

HEADPHONE_OUT (32

Ω load)

-87

HEADPHONE_OUT (10 K

Ω load)

-90

SNR (idle channel) (Note 5)

DAC to All Analog Outputs

100

All Analog Inputs to A/D with High Pass Filter enabled

A/D & D/A Digital Filter Pass Band (Note 6)

19,200

A/D & D/A Digital Filter Transition Band

19,200

28,800

A/D & D/A Digital Filter Stop Band

28,800

A/D & D/A Digital Filter Stop Band Rejection (Note 7)

-100

DAC Out-of-Band Rejection (Note 8)

-55

Group Delay (48 KHz sample rate)

Power Supply Rejection Ratio (1 KHz)

-70

Power Supply Rejection Ratio (20 KHz)

-40

Any Analog Input to ADC (10 KHz Signal Frequency) Crosstalk

-90

Any Analog Input to ADC (1 KHz Signal Frequency) Crosstalk

-90

Spurious Tone Rejection

-100

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