参数资料
型号: TPS65930A2ZCHR
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封装: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件页数: 80/115页
文件大小: 1232K
代理商: TPS65930A2ZCHR
DigitalPGA
gain=0to31dB
Amp
0to
30dB
ADC
Amp
CEA
–1.02dB
037-009
SWCS037G
– MAY 2008 – REVISED APRIL 2011
6.2.5
Carkit Input
The USB-CEA carkit uses the DP pad to input the audio signal.
Figure 6-11 shows the uplink carkit full path uplink characteristics for audio and USB.
Figure 6-11. Carkit Input Uplink Path Characteristics
Table 6-11 lists the USB-CEA carkit audio electrical characteristics.
Table 6-11. USB-CEA Carkit Audio Uplink Electrical Characteristics
Parameter
Test Conditions
Min
Typ
Max
Unit
Gain range (1)
–1
60
dB
Absolute gain, 0 dBFs at 1.02 kHz (1) (2)
USB-CEA default gain setting
–1.5
1.5
dB
Speech delay
Voice path
0.5
ms
Input common mode voltage (3)
USB-CEA
1.3
1.9
V
Phone microphone amplifier input impedance at 1 kHz
USB-CEA
8
120
k
Peak-to-peak single-ended input voltage (0 dBFs)
Default setting
1.414
VPP
Total harmonic distortion (sine wave at 1 kHz), default gain setting
At
–1 dBFs
–74
–60
dB
At
–6 dBFs
At
–10 dBFs
At
–20 dBFs
At
–60 dBFs
THD+N (20 Hz to 20 kHz, A-weighted)
At 0 dBFs
60
dB
Signal noise ratio (20 Hz to 20 kHz, A-weighted)
At 0 dBFs
60
dB
Idle channel noise (20 Hz to 20 kHz, A-weighted), default gain
USB-CEA
–77
dBFs
setting
Output PSRR (20 Hz to 20 kHz, A-weighted)
USB-CEA
50
dB
(1)
Gain range is defined by: CEA amplifier = 0.56 to
–1.02 dB; Preamplifier = 0 to 30 dB; Filter = 0 to 31 dB (1-dB steps).
(2)
The CEA default gain setting assumes 0 dB on the preamplifier, 1 dB on digital filter, and CEA amplifier at
–1.02 dB.
(3)
Full-scale input voltage is 1 V minimum.
Copyright
2008–2011, Texas Instruments Incorporated
Audio/Voice Module (TPS65930 Device Only)
67
focus.ti.com: TPS65930/TPS65920
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