STAC9227 데이터 시트보기 (PDF) - Integrated Device Technology

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STAC9227

8-CHANNEL HIGH DEFINITION AUDIO CODEC

Integrated Device Technology 

STAC9227/9228/9229/9230

8-CHANNEL HIGH DEFINITION AUDIO CODEC

PC AUDIO

Parameter

Conditions

AVdd Min Typ Max

VREFout (Note 8)

All

-

0.5 X

AVdd

-

VREFILT (VAG)

All

0.45 X

AVdd

Phased Locked Loop

PLL lock time

All

96

200

PLL (or Azalia Bit CLK) 24 MHz

clock jitter

All

150

500

Digital to Analog Converters

Resolution

All

24

5V

105

SNR - DAC to All Line-Out Ports Analog Mixer Disabled, PCM 4.5 V

101

(Note 4)

data

4.0 V

100

3.3 V

98

THD+N - DAC to All Line-Out

Ports

(Note 3)

Analog Mixer Disabled, -3dB

Signal, PCM data

5V

4.5 V

4.0 V

3.3 V

90

88

86

84

5V

90

SNR - DAC to All Line-Out Ports Analog Mixer Enabled, PCM 4.5 V

88

(Note 4)

data

4.0 V

87

3.3 V

85

THD+N - DAC to All Line-Out

Ports

(Note 3)

Analog Mixer Enabled, -3dB

Signal, PCM data

5V

4.5 V

4.0 V

3.3 V

80

78

77

75

Dynamic Range: DAC to All Line

Out Ports

(Note2)

5V

95

-60dB signal level

4.5 V

4.0 V

-

93

92

-

3.3 V

90

5V

105

SNR - DAC to All Headphone

Analog Mixer Disabled, 10KΩ 4.5 V

101

Ports (Note 4)

load, PCM data

4.0 V

100

3.3 V

98

Unit

V

V

µsec

psec

Bits

dB

dB

dB

dB

dB

dB

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

bandwidth.

2. ± 3dB limits for Line Output & 0 dB gain, at -20dBV

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

4. 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).

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

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

7. 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.

8. Can be set to 0.5 or 0.8 AVdd.

IDT™ 8-CHANNEL HIGH DEFINITION AUDIO CODEC

21

IDT CONFIDENTIAL

STAC9227/9228/9229/9230V 1.0 MARCH 2007

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