45
92HD83
V 0.98 04/09
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
92HD83
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
PC AUDIO
3.3.
AC Timing Specs
3.3.1.
HD Audio Bus Timing
VREFILT (VAG)
All
0.45 X
AVdd
V
Phased Locked Loop
PLL lock time
All
96
200
usec
PLL (or HD Audio Bit CLK) 24MHz clock
jitter
All
150
500
psec
ESD / Latchup
Latch-up
As described in JESD78A Class II
All
70
degC
ESD - Human Body Model
As described in JESD22-A114-B
All
2K
3K
V
Charged Device Model
As described in JESD22-C101
All
500
1K
V
1.Dynamic Range is the ratio of the full scale signal to the noise output with a -60dBFS signal as defined in AES17 as SNR in the
presence of signal and outlined in AES6id, measured “A weighted” over 20 Hz to 20 kHz bandwidth
2.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).
3.THD+N ratio as defined in AES17 and outlined in AES6id,non-weighted, over 20 Hz to 20 kHz bandwidth.Results at the jack
are dependent on external components and will likely be 1 - 2dB worse.
4.Peak-to-Peak Ripple over Passband meets ± 0.125dB limits, 48 kHz or 44.1 kHz Sample Frequency. 1dB limit.
5.Peak-to-Peak Ripple over Passband meets ± 0.125dB limits, 48 kHz or 44.1 kHz Sample Frequency. 1dB limit.
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.± 1dB limits for Line Output & 0 dB gain, at -20dBV
9.Spurious tone rejection is tested with ADC dither enabled and compared to ADC performance without dither.
10.All functions/converters active, pin complexes enabled, two FDX streams, line (10Kohm) loads. Add 24mA analog current per
stereo 32 ohm headphone.
11.One stereo DAC and corresponding pin widgets enabled (playback mode)
12.Mixer enabled
13.Idle measurement D3 set for minimum clicks/pops (biases and min. amps. on)
14.Can be set to 0.5 or 0.8 AVdd.
Parameter
Definition
Symbol
Min
Typ
Max
Units
BCLK Frequency
Average BCLK frequency
23.997
6
24.0
24.002
4
Mhz
BCLK Period
Period of BCLK including jitter
Tcyc
41.163
41.67
42.171
ns
BCLK High Phase
High phase of BCLK
T_high
17.5
24.16
ns
BCLK Low Phase
Low phase of BCLK
T_low
17.5
24.16
ns
BCLK jitter
150
500
ps
Table 18. HD Audio Bus Timing
Parameter
Conditions
AVdd
Min
Typ
Max
Unit
Table 17. 92HD83 Analog Performance Characteristics