參數(shù)資料
型號(hào)： TPA2006D1DRB
廠(chǎng)商： Texas Instruments, Inc.
英文描述： 1.45-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER WITH 1.8-V COMPATIBLE INPUT THRESHOLDS
中文描述： 1.45單聲道無(wú)濾波器D類(lèi)音頻功率放大器，1.8 - V兼容輸入閾值
文件頁(yè)數(shù)： 9/23頁(yè)
文件大?。?/td> 750K
代理商： TPA2006D1DRB
www.ti.com
APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIER
The TPA2006D1 is a fully differential amplifier with differential inputs and outputs. The fully differential amplifier
consists of a differential amplifier and a common-mode amplifier. The differential amplifier ensures that the
amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. The
common-mode feedback ensures that the common-mode voltage at the output is biased around V
DD
/2
regardless of the common-mode voltage at the input. The fully differential TPA2006D1 can still be used with a
single-ended input; however, the TPA2006D1 should be used with differential inputs when in a noisy
environment, like a wireless handset, to ensure maximum noise rejection.
Advantages of Fully Differential Amplifiers
Input-coupling capacitors not required:
– The fully differential amplifier allows the inputs to be biased at voltage other than mid-supply. For example,
if a codec has a mid-supply lower than the mid-supply of the TPA2006D1, the common-mode feedback
circuit will adjust, and the TPA2006D1 outputs will still be biased at mid-supply of the TPA2006D1. The
inputs of the TPA2006D1 can be biased from 0.5 V to V
DD
– 0.8 V. If the inputs are biased outside of that
range, input-coupling capacitors are required.
Mid-supply bypass capacitor, C
(BYPASS)
, not required:
– The fully differential amplifier does not require a bypass capacitor. This is because any shift in the
midsupply affects both positive and negative channels equally and cancels at the differential output.
Better RF-immunity:
– GSM handsets save power by turning on and shutting off the RF transmitter at a rate of 217 Hz. The
transmitted signal is picked-up on input and output traces. The fully differential amplifier cancels the signal
much better than the typical audio amplifier.
COMPONENT SELECTION
Figure 21
shows the TPA2006D1 typical schematic with differential inputs and
Figure 22
shows the TPA2006D1
with differential inputs and input capacitors, and
Figure 23
shows the TPA2006D1 with single-ended inputs.
Differential inputs should be used whenever possible because the single-ended inputs are much more
susceptible to noise.
TPA2006D1
SLOS498–SEPTEMBER 2006
Table 1. Typical Component Values
REF DES
R
I
C
S
C
I(1)
VALUE
EIA SIZE
0402
0402
0201
MANUFACTURER
Panasonic
Murata
Murata
PART NUMBER
ERJ2RHD154V
GRP155F50J105Z
GRP033B10J332K
150 k
(
±
0.5%)
1
μ
F (+22%, -80%)
3.3 nF (
±
10%)
(1)
C
is only needed for single-ended input or if V
is not between 0.5 V and V
DD
– 0.8 V. C
I
= 3.3 nF
(with R
I
= 150 k
) gives a high-pass corner frequency of 321 Hz.
9
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參數(shù)描述
TPA2006D1DRBR 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA2006D1DRBRG4 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA2006D1DRBT 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA2006D1DRBTG4 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA2006D1EVM 功能描述:音頻 IC 開(kāi)發(fā)工具 AUD POWER AMP RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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