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參數(shù)資料
| 型號： | TPA6205A1DGNR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 28/28頁 |
| 文件大小： | 912K |
| 代理商： | TPA6205A1DGNR |
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APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIER
APPLICATION SCHEMATICS
Advantages of Fully Differential Amplifiers
_
+
VDD
VO+
VO-
GND
ToBattery
Cs
Bias
Circuitry
IN-
IN+
+
-
InFrom
DAC
SHUTDOWN
RI
C(
)
BYPASS
(Optional)
RF
www.ti.com.............................................................................................................................................................. SLOS490B–JULY 2006–REVISED JUNE 2008
negative channels equally and cancels at the
differential output. However, removing the bypass
capacitor slightly worsens power supply rejection
The TPA6205A1 is a fully differential amplifier with
ratio (kSVR), but a slight decrease of kSVR may be
differential inputs and outputs. The fully differential
acceptable when an additional component can be
amplifier consists of a differential amplifier and a
eliminated (see Figure 17).
common- mode amplifier. The differential amplifier
Better RF-immunity: GSM handsets save power
ensures that the amplifier outputs a differential
by turning on and shutting off the RF transmitter at
voltage that is equal to the differential input times the
a rate of 217 Hz. The transmitted signal is
gain. The common-mode feedback ensures that the
picked-up on input and output traces. The fully
common-mode voltage at the output is biased around
differential amplifier cancels the signal much
VDD/2 regardless of the common- mode voltage at the
better than the typical audio amplifier.
input.
Input coupling capacitors not required: A fully
27 through
show
application
differential amplifier with good CMRR, like the
schematics for differential and single-ended inputs.
TPA6205A1, allows the inputs to be biased at
Typical values are shown in Table 1.
voltage other than mid-supply. For example, if a
DAC has mid-supply lower than the mid-supply of
Table 1. Typical Component Values
the TPA6205A1, the common-mode feedback
COMPONENT
VALUE
circuit adjusts for that, and the TPA6205A1
RI
10 k
outputs are still biased at mid-supply of the
RF
10 k
TPA6205A1. The inputs of the TPA6205A1 can
be biased from 0.5 V to VDD - 0.8 V. If the inputs
C(BYPASS)
(1)
0.22
F
are biased outside of that range, input coupling
CS
1
F
capacitors are required.
CI
0.22
F
Mid-supply bypass capacitor, C
(BYPASS),
not
(1) C(BYPASS) is optional
required: The fully differential amplifier does not
require a bypass capacitor. This is because any
shift in the mid-supply affects both positive and
Figure 27. Typical Differential Input Application Schematic
Copyright 2006–2008, Texas Instruments Incorporated
9
Product Folder Link(s): TPA6205A1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6205A1DGNRG4 | 功能描述:音頻放大器 1.25W Mono Fully Diff ClassAB Aud Amp 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6205A1DRB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.25-W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER WITH 1.8-V INPUT LOGIC THRESHOLDS |
| TPA6205A1DRBR | 功能描述:音頻放大器 1.25W Mono Fully Diff ClassAB Aud Amp 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6205A1DRBRG4 | 功能描述:音頻放大器 1.25W Mono Fully Diff ClassAB Aud Amp 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6205A1DRBT | 功能描述:音頻放大器 1.25-W Mono Fully Diff Class-AB Aud 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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