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参数资料
型号： TLV320AIC3111IRHBT
厂商： TEXAS INSTRUMENTS INC
元件分类： 音频／视频放大
英文描述： AUDIO AMPLIFIER, PQCC32
封装： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件页数： 93/156页
文件大小： 1701K
代理商： TLV320AIC3111IRHBT
TLV320AIC3111
www.ti.com
SLAS644B – JULY 2009 – REVISED OCTOBER 2009
Mode B
To choose mode B, page 0 / register 102, bit D5 must be programmed to 1. In dc-measurement mode B,
a first-order IIR filter is used. The coefficients of this filter are determined by D, page 0 / register 102,
bits D4–D0. The nature of the filter is given in Table 5-23.
Table 5-23. DC Measurement Bandwidth Settings
D: Page 0 / register 102, Bits D4–D0
–3 dB BW (Hz)
–0.5 dB BW (Hz)
1
688,440
236,500
2
275,970
96,334
3
127,400
44,579
4
61,505
21,532
5
30,248
10,590
6
15,004
5,253
7
7,472
2,616
8
3,729
1,305
9
1,862
652
10
931
326
11
465
163
12
232.6
81.5
13
116.3
40.7
14
58.1
20.3
15
29.1
10.2
16
14.54
5.09
17
7.25
2.54
18
3.63
1.27
19
1.8
0.635
20
0.908
0.3165
By programming page 0 / register 103, bit D5 to 1, the averaging filter is periodically reset after 2R number
of ADC_MOD_CLK periods, where R is programmed in page 0 / register 103, bits D4–D0. When page 0 /
register 103, bit D5 is set to 1, then the value of D should be less than the value of R. When page 0 /
register 103, bit D5 is programmed to 0, the averaging filter is never reset.
5.6
Audio DAC and Audio Analog Outputs
Each channel of the stereo audio DAC consists of a digital audio processing block, a digital interpolation
filter, a digital delta-sigma modulator, and an analog reconstruction filter. This high oversampling ratio
(normally DOSR is between 32 and 128) exhibits good dynamic range by ensuring that the quantization
noise generated within the delta-sigma modulator stays outside of the audio frequency band. Audio analog
outputs include stereo headphone/lineouts and stereo class-D speaker outputs.
5.6.1
DAC
The TLV320AIC3111 stereo audio DAC supports data rates from 8 kHz to 192 kHz. Each channel of the
stereo audio DAC consists of a signal-processing engine with fixed processing blocks, a programmable
miniDSP, a digital interpolation filter, multibit digital delta-sigma modulator, and an analog reconstruction
filter. The DAC is designed to provide enhanced performance at low sampling rates through increased
oversampling and image filtering, thereby keeping quantization noise generated within the delta-sigma
Copyright 2009, Texas Instruments Incorporated
APPLICATION INFORMATION
41
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Product Folder Link(s): TLV320AIC3111
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