参数资料
型号: TPS65930BZCH
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: 71/115页
文件大小: 1232K
代理商: TPS65930BZCH
Low-pass
Filter
Digital
modulator
Randomizer
High-pass
filter
Audiointerface
DAC
037-051
SWCS037G
– MAY 2008 – REVISED APRIL 2011
6.1.4
Digital Audio Filter Module
Figure 6-5 shows the digital audio filter downlink full path characteristics for the audio interface.
Figure 6-5. Digital Audio Filter Downlink Path Characteristics
The HPF can be bypassed. It is controlled by the MISC_SET_2 ARX_HPF_BYP bit set to address 0x49.
Table 6-4 lists the audio filter frequency responses relative to reference gain at 1 kHz.
Table 6-4. Digital Audio Filter RX Electrical Characteristics
Parameter
Conditions
Min
Typ
Max
Unit
Passband
0.42
FS
Passband ripple
0 to 0.42FS
(1)
–0.25
0.1
0.25
dB
Stopband
0.6
FS
Stopband attenuation
F = 0.6FS
(1) to 0.8F
S
(1)
60
75
dB
Group delay
15.8/FS
(1)
μs
Linear phase
–1.4
1.4
°
(1)
FS is the sampling frequency (8, 11.025, 12, 16, 22.05, 24, 32, 44.1, or 48 kHz).
6.1.5
Boost Stage
The boost effect adds emphasis to low frequencies. It compensates for a HPF created by the capacitor
resistor (CR) filter of the headset (in ac-coupling configuration).
There are four modes. Three effects are available, with slightly different frequency responses, and the
fourth setting disables the boost effect:
Boost effect 1
Boost effect 2
Boost effect 3
Flat equalization: The boost effect is in bypass mode.
NOTE
Boost effect modes are defined in Table 6-5.
Table 6-5 and Table 6-6 include the typical values according to the frequency response versus input
frequency and FS frequency.
Copyright
2008–2011, Texas Instruments Incorporated
Audio/Voice Module (TPS65930 Device Only)
59
focus.ti.com: TPS65930/TPS65920
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