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參數(shù)資料
| 型號(hào)： | TPA2010D1YZF |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
| 中文描述： | 2.5單聲道無濾波器D類音頻功率放大器 |
| 文件頁數(shù)： | 9/23頁 |
| 文件大小： | 415K |
| 代理商： | TPA2010D1YZF |
SLOS417A OCTOBER 2003 REVISED DECEMBER 2003
www.ti.com
9
APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIER
The TPA2010D1 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 TPA2010D1 can still be used with
a single-ended input; however, the TPA2010D1 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 midsupply lower than the midsupply of the TPA2010D1, the common-mode
feedback circuit will adjust, and the TPA2010D1 outputs will still be biased at midsupply of the
TPA2010D1. The inputs of the TPA2010D1 can be biased from 0.5V to V
DD
– 0.8 V. If the inputs are
biased outside of that range, input-coupling capacitors are required.
Midsupply 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 RFimmunity:
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 27 shows the TPA2010D1 typical schematic with differential inputs and Figure 28 shows the
TPA2010D1 with differential inputs and input capacitors, and Figure 29 shows the TPA2010D1 with
single-ended inputs. Differential inputs should be used whenever possible because the single-ended inputs are
much more susceptible to noise.
Table 1. Typical Component Values
REF DES
RI
CS
CI(1)
(1)CI is only needed for single-ended input or if VICM is not between 0.5 V and VDD – 0.8 V. CI = 3.3 nF
(with RI = 150 k
) gives a high-pass corner frequency of 321 Hz.
VALUE
EIA SIZE
0402
MANUFACTURER
Panasonic
PART NUMBER
ERJ2RHD154V
150 k
(
±
0.5%)
1
μ
F (+22%, 80%)
3.3 nF (
±
10%)
0402
Murata
GRP155F50J105Z
0201
Murata
GRP033B10J332K
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| TPA2010D1YZFR | 功能描述:音頻放大器 Mono Filter-Free Class-D in WCSP 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 |
| TPA2010D1YZFRG4 | 制造商:TI 功能描述:AUDIO POWER AMPLIFIER |
| TPA2010D1YZFT | 功能描述:音頻放大器 Mono Filter-Free Class-D in WCSP 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 |
| TPA2011D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Filter-Free Class-D Audio Power Amplifier With Auto-Recovering Short-Circuit Protection |
| TPA2011D1_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Filter-Free Class-D Audio Power Amplifier |
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