STAC9227 datasheet(21/237 Pages) IDT

21 / 237 page

STAC9227/9228/9229/9230

8-CHANNEL HIGH DEFINITION AUDIO CODEC

PC AUDIO

IDT™

8-CHANNEL HIGH DEFINITION AUDIO CODEC

STAC9227/9228/9229/9230V 1.0 MARCH 2007

IDT CONFIDENTIAL

Ratio of Full Scale signal to noise output with -60dB signal, measured “A weighted” over a 20 Hz to a 20 KHz

bandwidth.

± 3dB limits for Line Output & 0 dB gain, at -20dBV

Amplitude of THD+N, measured with A-weighting filter, over 20 Hz to 20 KHz bandwidth.

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).

Peak-to-Peak Ripple over Passband meets ± 0.25dB limits, 48 KHz Sample Frequency.

Stop Band rejection determines filter requirements. Out-of-Band rejection determines audible noise.

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.

Can be set to 0.5 or 0.8 AVdd.

VREFout (Note 8)

All

0.5 X

AVdd

-V

VREFILT (VAG)

All

0.45 X

AVdd

Phased Locked Loop

PLL lock time

All

200

µsec

PLL (or Azalia Bit CLK) 24 MHz

clock jitter

All

150

500

psec

Digital to Analog Converters

Resolution

All

Bits

SNR - DAC to All Line-Out Ports

(Note 4)

Analog Mixer Disabled, PCM

data

5 V

4.5 V

4.0 V

3.3 V

105

101

100

THD+N - DAC to All Line-Out

Ports

(Note 3)

Analog Mixer Disabled, -3dB

Signal, PCM data

5 V

4.5 V

4.0 V

3.3 V

SNR - DAC to All Line-Out Ports

(Note 4)

Analog Mixer Enabled, PCM

data

5 V

4.5 V

4.0 V

3.3 V

THD+N - DAC to All Line-Out

Ports

(Note 3)

Analog Mixer Enabled, -3dB

Signal, PCM data

5 V

4.5 V

4.0 V

3.3 V

Dynamic Range: DAC to All Line

Out Ports

(Note2)

-60dB signal level

5 V

4.5 V

4.0 V

3.3 V

-dB

SNR - DAC to All Headphone

Ports (Note 4)

Analog Mixer Disabled, 10K

Ω

load, PCM data

5 V

4.5 V

4.0 V

3.3 V

105

101

100

Parameter

Conditions

AVdd

Min

Typ

Max

Unit

STAC9227 데이터시트(PDF) 21 Page - Integrated Device Technology

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