STAC9708 datasheet(47/56 Pages) ETC

47 / 56 page

SigmaTel, Inc.

Preliminary

STAC9708/11

10/02/98

10.5 STAC9708 Analog Performance Characteristics (Tambient = 25 oC, AVdd = 5.0V ± 5%,

DVdd = 3.3V ± 5%, AVss=DVss=0V; 1 kHz input sine wave; Sample Frequency = 48 kHz; 0 dB = 1 Vrms,

10K

Ω/50pF load, Testbench Characterization BW: 20 Hz – 20 kHz, 0 dB settings on all gain stages)

Table 33. Analog Performance Characteristics

PARAMETER

MIN

TYP

MAX

UNITS

Full Scale Input Voltage:

Line Inputs

Mic Inputs

1.0

0.1

Vrms

Full Scale Output Voltage:

Line Output 5V

1.0

Vrms

Analog S/N:

CD to LINE_OUT 5V

Other to LINE_OUT 5V

Analog Frequency Response

20,000

Digital S/N

D/A 5V

A/D 5V

Total Harmonic Distortion:

Line Output

0.02

D/A & A/D Frequency Response

19,200

Transition Band

19,200

28,800

Stop Band

28,800

∞

Stop Band Rejection

+85

−

Out-of-Band Rejection

+40

−

Group Delay

Power Supply Rejection Ratio (1kHz)

+40

−

Crosstalk between Input channels

-70

Spurious Tone Rejection

+100

−

Attenuation, Gain Step Size

1.5

−

Input Impedance

−

Ω

Input Capacitance

−

Vrefout

0.41 x AVdd

−

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