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參數(shù)資料
| 型號： | TLV320ADC3101IRGET |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC24 |
| 封裝： | GREEN, PLASTIC, VQFN-24 |
| 文件頁數(shù)： | 37/84頁 |
| 文件大小： | 1363K |
| 代理商： | TLV320ADC3101IRGET |
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0
–20
–40
–60
–80
–100
–120
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Magnitude
dB
–
Frequency Normalized With Respect to fS
ADC Channel Response for Decimation Filter C
(Red line corresponds to –60 dB)
ADC Data Interface
Digital Microphone Function
SLAS553A – NOVEMBER 2008 – REVISED SEPTEMBER 2009...................................................................................................................................... www.ti.com
Decimation Filter C
Filter type C along with an AOSR of 32 is specially designed for 192-ksps operation of the ADC. The pass band,
which extends up to 0.11 × fS (corresponds to 21 kHz), is suited for audio applications.
Table 12. Specifications for ADC Decimation Filter C
Parameter
Condition
Value (Typical)
Unit
Filter gain from 0 to 0.11 fS
0–0.11 fS
±0.033
dB
Filter gain from 0.28 fS to 16 fS
0.28 f–16 fS
–60
dB
Filter group delay
11/fS
s
Pass-band ripple, 8 ksps
0–0.11 fS
0.033
dB
Pass-band ripple, 44.18 ksps
0–0.11 fS
0.033
dB
Pass-band ripple, 48 ksps
0–0.11 fS
0.032
dB
Pass-band ripple, 96 ksps
0–0.11 fS
0.032
dB
Pass-band ripple, 192 ksps
0–20 kHz
0.086
dB
Figure 46. ADC Decimation Filter C, Frequency Response
The decimation filter and signal processing block in the ADC channel passes 32-bit data words to the audio
serial interface once every frame (WCLK). During each frame (WCLK), a pair of data words (for left and right
channels) is passed. The audio serial interface rounds the data to the required word length of the interface
before converting to serial data per the different modes for audio serial interface.
In addition to supporting analog microphones, the TLV320ADC3101 also interfaces to digital microphones.
42
Copyright 2008–2009, Texas Instruments Incorporated
Product Folder Link(s) :TLV320ADC3101
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