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參數(shù)資料
| 型號(hào)： | TPA6211A1DGNG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 5/32頁 |
| 文件大?。?/td> | 916K |
| 代理商： | TPA6211A1DGNG4 |
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APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIER
Advantages of Fully Differential Amplifiers
APPLICATION SCHEMATICS
_
+
VDD
VO+
VO
GND
6
5
8
7
To Battery
Cs
IN
IN+
4
3
+
In From
DAC
RI
40 k
40 k
(1) C(BYPASS) is optional
Bias
Circuitry
2
SHUTDOWN
1
C(BYPASS)(1)
100 k
www.ti.com........................................................................................................................................................ SLOS367C – AUGUST 2003 – REVISED JUNE 2008
mid-supply voltage affects both positive and
negative channels equally, thus canceling at the
differential output. Removing the bypass capacitor
The TPA6211A1 is a fully differential amplifier with
slightly worsens power supply rejection ratio
differential inputs and outputs. The fully differential
(kSVR), but a slight decrease of kSVR may be
amplifier consists of a differential amplifier and a
acceptable when an additional component can be
common- mode amplifier. The differential amplifier
eliminated (See Figure 17).
ensures that the amplifier outputs a differential
Better RF-immunity: GSM handsets save power
voltage that is equal to the differential input times the
by turning on and shutting off the RF transmitter at
gain. The common-mode feedback ensures that the
a rate of 217 Hz. The transmitted signal is
common-mode voltage at the output is biased around
picked-up on input and output traces. The fully
VDD/2 regardless of the common- mode voltage at the
differential amplifier cancels the signal much
input.
better than the typical audio amplifier.
Input coupling capacitors not required: A fully
differential amplifier with good CMRR, like the
28 through
show
application
TPA6211A1, allows the inputs to be biased at
schematics for differential and single-ended inputs.
voltage other than mid-supply. For example, if a
Typical values are shown in Table 1.
DAC has a lower mid-supply voltage than that of
the TPA6211A1, the common-mode feedback
Table 1. Typical Component Values
circuit compensates, and the outputs are still
COMPONENT
VALUE
biased at the mid-supply point of the TPA6211A1.
RI
40 k
The inputs of the TPA6211A1 can be biased from
C(BYPASS)
(1)
0.22
F
0.5 V to VDD - 0.8 V. If the inputs are biased
outside of that range, input coupling capacitors
CS
1
F
are required.
CI
0.22
F
Mid-supply bypass capacitor, C
(BYPASS),
not
required: The fully differential amplifier does not
require a bypass capacitor. Any shift in the
(1)
C(BYPASS) is optional.
Figure 28. Typical Differential Input Application Schematic
Copyright 2003–2008, Texas Instruments Incorporated
13
Product Folder Link(s): TPA6211A1
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參數(shù)描述 |
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| TPA6211A1DGNR | 功能描述:音頻放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6211A1DGNRG4 | 功能描述:音頻放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6211A1DRB | 功能描述:音頻放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6211A1DRBG4 | 功能描述:音頻放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6211A1DRBR | 功能描述:音頻放大器 Mono Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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