參數(shù)資料
型號: TPS65950ZXNT
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA209
封裝: 7 X 7 MM, 0.40 MM PITCH, PLASTIC, BGA-209
文件頁數(shù): 155/167頁
文件大?。?/td> 2566K
代理商: TPS65950ZXNT
6.2.1.3 Digital Microphone Bias Module Characteristics
2.75V
1.8V
VMIC1/2.OUT
Digmic
bias(LDO)
VRIO=1.8V
DIG.MIC.CLK0/1
BUF
DIGMICleft
Audiodigitalfilter
Comparator
DIGMICright
Q
S
R
0.9V
DIG.MIC.0/1
Comparator
Audiodigitalfilter
Q
R
S
AudioPLL
DigialMIC
clockgenerator
50*Fs
032-035
TPS65950
Integrated Power Management/Audio Codec
SWCS032 – OCTOBER 2008
www.ti.com
Figure 6-22 is a block diagram of the digital microphone bias module.
Figure 6-22. Digital Microphone Bias Module Block Diagram
Table 6-18 and Table 6-19 list the characteristics of the digital microphone bias module.
Table 6-18. Digital Microphone Bias Module Characteristics
Parameter
Test Conditions
Min(1)
Typ(2) Max(3)
Unit
Bias voltage
1.8
V
Load current
10
mA
PSRR (from VBAT)
20 Hz to 6.6 kHz
60
dB
External capacitor
0.3
1
3.3
F
ESR for capacitor
At 100 kHz
0.02
0.6
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
Table 6-19. Digital Microphone Bias Module Characteristics (2)
Parameter
Test Conditions
Min(1)
Typ(2)
Max(3)
Unit
Comparator high threshold
0.5*VDD_IO
0.7*VDD_IO
Comparator low threshold
0.3*VDD_IO
0.5*VDD_IO
Startup time
2
s
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
Audio/Voice Module
88
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