92HD81 Datasheet, PDF (44/279 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
3.3.2. SPDIF Timing
Parameter
SPDIF_OUT Frequency
SPDIF_OUT unit interval
SPDIF_OUT jitter
SPDIF_OUT rise time
SPDIF_OUT fall time
Definition
Symbol
highest rate of encoded signal 64 times the
sample rate
1/(128 times the sample rate)
UI
SPDIF_OUT jitter
T_rise
T_fall
Table 16. SPDIF Timing
Min
2.8224
177.15
Typ
3.072
162.76
Max
12.288
40.69
4.43
15
15
Units
MHz
ns
ns
ns
ns
3.3.3. Digital Microphone Timing
Parameter
DMIC_CLK Frequency
DMIC_CLK Period
DMIC_CLK jitter
DMIC Data setup
DMIC Data hold
Definition
Symbol
Average DMIC_CLK frequency
Period of DMIC_CLK
Tdmic_cyc
DMIC_CLK jitter
Setup for the microphone data at both rising
and falling edges of DMIC_CLK
Tdmic_su
Hold for the microphone data at both rising and
falling edges of DMIC_CLK
Tdmic_h
Table 17. Digital Mic timing
Min
1.176
850.34
5
5
Typ
2.352
425.17
Max
4.704
212.59
5000
Units
MHz
ns
ps
ns
ns
3.3.4. Class-AB BTL Amplifier Performance
Parameter
Min
Typ
Max
Unit
Output Power (BTL 4 ohm, 5V - Continuous Average Power))
2
W
Output Power (BTL 8 ohm, 5V - Continuous Average Power))
1
Amplifier Efficiency 5V, 2W)¹
W
60
%
THD+N (BTL 4 or 8 ohm, 5V, FS)
1
%
Frequency Response
20
-
20K
Hz
Output voltage noise
50
uV
shutdown current
0.6
mA
Table 18. Class-AB BTL Amplifier Performance
1. Amplifier efficiency includes circuits specific to the BTL amplifier audio path such as temperature limit, short circuit, and other support circuits.
IDT CONFIDENTIAL
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©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
V 0.995 01/11
92HD81