- 您现在的位置：买卖IC网 > PDF目录98270 > TPA2005D1DGNG4 (TEXAS INSTRUMENTS INC) 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 PDF资料下载
参数资料
| 型号： | TPA2005D1DGNG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | GREEN, PLASTIC, MSOP-8 |
| 文件页数： | 5/32页 |
| 文件大小： | 1128K |
| 代理商： | TPA2005D1DGNG4 |
第1页第2页第3页第4页当前第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
SUMMING INPUT SIGNALS WITH THE TPA2005D1
Summing Two Differential Input Signals
Gain 1 +
V
O
V
I1
+ 2
150 kW
R
I1
V
(4)
Gain 2 +
V
O
V
I2
+ 2
150 kW
R
I2
V
(5)
_
+
IN–
IN+
PWM
H–
Bridge
VO+
VO–
Internal
Oscillator
CS
To Battery
VDD
GND
Bias
Circuitry
RI2
+
–
Differential
Input 1
SHUTDOWN
RI1
+
–
Differential
Input 2
Filter-Free Class D
Summing a Differential Input Signal and a Single-Ended Input Signal
Gain 1 +
V
O
V
I1
+ 2
150 kW
R
I1
V
(6)
Gain 2 +
V
O
V
I2
+ 2
150 kW
R
I2
V
(7)
C
I2 +
1
2p R
I2
f
c2
(8)
www.ti.com............................................................................................................................................................... SLOS369F – JULY 2002 – REVISED JULY 2008
Most wireless phones or PDAs need to sum signals at the audio power amplifier or just have two signal sources
that need separate gain. The TPA2005D1 makes it easy to sum signals or use separate signal sources with
different gains. Many phones now use the same speaker for the earpiece and ringer, where the wireless phone
would require a much lower gain for the phone earpiece than for the ringer. PDAs and phones that have stereo
headphones require summing of the right and left channels to output the stereo signal to the mono speaker.
Two extra resistors are needed for summing differential signals (a total of 5 components). The gain for each input
If summing left and right inputs with a gain of 1 V/V, use RI1= RI2= 300 k.
If summing a ring tone and a phone signal, set the ring-tone gain to Gain 2 = 2 V/V, and the phone gain to gain
1 = 0.1 V/V. The resistor values would be. . .
R
I1 = 3 M, and = RI2 = 150 k.
Figure 35. Application Schematic With TPA2005D1 Summing Two Differential Inputs
Figure 36 shows how to sum a differential input signal and a single-ended input signal. Ground noise can couple
in through IN+ with this method. It is better to use differential inputs. The corner frequency of the single-ended
input is set by CI2, shown in equation Equation 8. To assure that each input is balanced, the single-ended input
must be driven by a low-impedance source even if the input is not in use.
Copyright 2002–2008, Texas Instruments Incorporated
13
Product Folder Link(s): TPA2005D1
相关PDF资料 |
PDF描述 |
|---|---|
| TPA2005D1DGNRG4 | 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA2006D1DRBR | 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PQCC8 |
| TPA2006D1DRBT | 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PQCC8 |
| TPA2006D1DRB | 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA2006D1DRBRG4 | 1.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PQCC8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA2005D1DGNR | 功能描述:音频放大器 Mono Fully Diff Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA2005D1DGNRG4 | 功能描述:音频放大器 Mono Fully Diff Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA2005D1DGNRQ1 | 功能描述:音频放大器 1.4W Class D Audio Power Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA2005D1DRBQ1 | 功能描述:音频放大器 1.4-W Mono Class-D Aud Power Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA2005D1DRBR | 功能描述:音频放大器 Mono Fully Diff Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。