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參數(shù)資料
| 型號(hào)： | TPA2000D1GQCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA48 |
| 封裝： | 4 X 4 MM, PLASTIC, BGA-48 |
| 文件頁(yè)數(shù)： | 4/23頁(yè) |
| 文件大小： | 500K |
| 代理商： | TPA2000D1GQCR |
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GAIN SETTING VIA GAIN0 AND GAIN1 INPUTS
INPUT RESISTANCE
Ci
IN
Zi
Zf
Input
Signal
f
*3 dB +
1
2p C
i Z i
(4)
TPA2000D1
SLOS328F – JUNE 2000 – REVISED MARCH 2004
APPLICATION INFORMATION (continued)
The gain of the TPA2000D1 is set by two input terminals, GAIN0 and GAIN1.
The gains listed in Table 1 are realized by changing the taps on the input resistors inside the amplifier. This
causes the input impedance (Zi) to be dependent on the gain setting. The actual gain settings are controlled by
ratios of resistors, so the actual gain distribution from part-to-part is quite good. However, the input impedance
can shift by up to 30% due to shifts in the actual resistance of the input resistors.
For design purposes, the input network (discussed in the next section) should be designed assuming an input
impedance of 20 k
, which is the absolute minimum input impedance of the TPA2000D1. At the higher gain
settings, the input impedance can increase as high as 115 k
.
Table 2. GAIN SETTINGS
AMPLIFIER GAIN
INPUT IMPEDANCE
(dB)
(k
)
GAIN1
GAIN0
TYP
0
6
104
0
1
12
74
1
0
18
44
1
23.5
24
Each gain setting is achieved by varying the input resistance of the amplifier, which can range from its smallest
value to over six times that value. As a result, if a single capacitor is used in the input high-pass filter, the -3 dB
or cutoff frequency also changes by over six times.
The -3-dB frequency can be calculated using Equation 4.
12
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TPA2000D1PW | 功能描述:音頻放大器 2W Class-D 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 |
| TPA2000D1PW | 制造商:Texas Instruments 功能描述:POWER AMP CLASS-D AUDIO SMD 2000 |
| TPA2000D1PWG4 | 功能描述:音頻放大器 Mono Filter-Free Class-D 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 |
| TPA2000D1PWR | 功能描述:音頻放大器 Mono Filter-Free Class-D 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 |
| TPA2000D1PWRG4 | 功能描述:音頻放大器 Mono Filter-Free Class-D 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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