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VT1616

6-Channel AC97 Codec with S/PDIF

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Performance Specifications

VT1616 6-Channel AC97 Codec with S/PDIF

Table 9. Analog Performance Characteristics (+5V Power)

TA=25°C, AVCC = 5V ± 5%, DVCC = 3.3V ± 5%; AGND = DGND =0V; 10kΩ / 50pF Load; FS = 48 KHz, 0dB = 1VRMS; BW: 20Hz ~ 20 KHz,

0dB Attentuation, IB[1:0]=00 (power up default), as targeted for a 2-layers VT5542 ACR card

Symbol

Parameter

Min

Typ

Max

Unit

Full Scale Input Voltage:

Line Inputs

1.0

VRMS

Mic Inputs (20dB = 0)

1.0

VRMS

Mic Inputs (20dB = 1)

0.1

VRMS

Full Scale Output Voltage:

Line Outputs

1.0

VRMS

Mono Output

1.0

VRMS

Analog S/N:

CD to LINE_OUT

96

dB

Other to LINE_OUT

96

dB

Analog Frequency Response

20

20,000

Hz

Digital S/N:

DACs

85

88

dB

ADC

75

91

dB

Total Harmonic Distortion: LINE_IN to LINE_OUT

-94

-74

dB

(DA) DAC to LINE_OUT

-82

-74

dB

D/A and A/D Frequency Response:

DACs

20

19,200

Hz

ADC

20

19,200

Hz

Transition Band:

DACs

19,200

28,800

Hz

ADC

19,200

28,800

Hz

Stop Band:

DACs 28,800

infinity

Hz

ADC 28,800

infinity

Hz

Stop Band Rejection:

DACs

75

dB

ADC

75

dB

Out-of-Band Rejection

-40

dB

Group Delay

1

ms

Power Supply Rejection Ratio (1 KHz)

-40

dB

Input Channel Crosstalk

-70

dB

Spurious Tone Reduction

-100

dB

Attenuation, Gain Step Size

Input Impedance

1.5

dB

10

45

kΩ

Input Capacitance

15

pF

VREFOUT

2.4

V

Note:

VIL = 0.8V, VIH = 2.4V

Analog Frequency Response has ±1dB limits

SNR (measured as THD+N) of rms output level with 1 KHz full-scale input to rms output level with all zeros into digital input

Measured “A wtd” over a 20Hz ~ 20 KHz bandwidth (AES17-1991 Idle Channel Noise or EIAJ CP-307 SNR)

THD: 0dB gain, 20 KHz BW, Fs = 48 KHz, -3dB “large” signal

A/D and D/A Frequency Response has ±0.25dB limits

Stop Band Rejection determines filter requirements

Out-of-Band rejection determines audible noise

Integrated Out-of-band noise generated by DAC during normal PCM audio playback over: BW = 28.8 KHz~100 KHz, with respect to 1

VRMS DAC output

Revision 1.5, October 11, 2002

31

Data Sheet

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