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| 型号： | TSC2100IDAR |
| 厂商： | Texas Instruments, Inc. |
| 元件分类： | Codec |
| 英文描述： | PROGRAMMABLE TOUCH SCREEN CONTROLLER WITH INTEGRATED STEREO AUDIO CODEC AND HEADPHONE/SPEAKER AMPLIFIER |
| 中文描述： | 可编程触摸屏控制器，它集成立体声音频编解码器和耳机/扬声器放大器 |
| 文件页数： | 33/71页 |
| 文件大小： | 717K |
| 代理商： | TSC2100IDAR |
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SLAS378 NOVEMBER 2003
www.ti.com
33
10
15
20
0
100 200 300 400 500 600
f Frequency Hz
G
5
0
700 800 900 1 k
Figure 29. Frequency Response For 16- Load and 50- F Decoupling Capacitor After Gain
Compensation Using Above Set of Coefficients for Audio Effects Filter
Using the capless output configuration eliminates the need for these capacitors and removes the accompanying high-pass
filter entirely. However, this configuration does have one drawback – if the RETURN terminal of the headphone jack (which
is wired to the TSC2100 VGND pin) is ever connected to a ground, that is shorted to the TSC2100 ground pin, then the
VGND amplifier enters short-circuit protection, and the audio output does not function properly.
TSC2100
HPR
HPL
VGND
Headphone Jack
TSC2100
HPR
HPL
VGND
Headphone Jack
Figure 30. Headphone Configurations, AC-Coupled (left) and Capless (right)
The audio output drivers in high power mode can also be configured to drive a mono differential signal into a speaker load
of 8-
minimum. The speaker load should be connected differentially between the HPR and HPL outputs. There are several
options for playback of DAC data in this case. If a stereo digital signal is available, this signal can be sent in normal stereo
fashion to the audio DAC. The programmable digital effects filters can then be used to invert one channel, so that the signal
applied across the speaker load is (LEFT + RIGHT), or effectively a mono-mix of the two channels. A simple example of
how to implement this inversion using the programmable filters is to set the coefficients as follows:
Leftchannel coefficients:
N0=32767, N1=0, N2=0, N3=32767, N4=0, N5=0
D1=0, D2=0, D4=0, D5=0
Rightchannel coefficients: N0=32767, N1=0, N2=0, N3=32767, N4=0, N5=0
D1=0, D2=0, D4=0, D5=0
This provides no spectral shaping, it only inverts the right channel relative to the left channel, such that the signals at HPL
and HPR are (LEFT) and (RIGHT), with the signal across the speaker then being LEFT+ RIGHT. In a general case when
spectral shaping is also desired, the inversion can be accomplished simply by setting N0, N1, and N2 coefficients of one
channel to the negative of the values set for the other channel. Note that the programmable filtering must be enabled by
setting BITD1/REG05H/Page2 to
1
.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC2100IDARG4 | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| TSC2100IRHB | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| TSC2100IRHBG4 | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| TSC2100IRHBR | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| TSC2100IRHBRG4 | 功能描述:触摸屏转换器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
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