92HD87 Datasheet, PDF (39/204 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD87
SINGLE CHIP PC AUDIO SYSTEM, CODEC+STEREO SPEAKER AMPLIFIER+CAPLESS HP+LDO
3.3.2. 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 15. 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
3.3.3. 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 16. 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.
3.3.4. Capless Headphone Supply Characteristics
Parameter
LDO idle current
Cap-less Headphone Amp idle current
Charge Pump idle current
Charge Pump shutdown time
Charge Pump start-up time
Frequency
C1/C2 cap value
Min
Table 17. Capless Headphone Supply
Typ
Max
Unit
1
2
mA
2
3
4
6
mA
1
mS
10
mS
384
KHz
2.2
uF
IDT CONFIDENTIAL
39
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
V 0.995 01/11
92HD87