参数资料
型号: TPA701DGNRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 音频/视频放大
英文描述: 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
封装: GREEN, PLASTIC, MSOP-8
文件页数: 8/28页
文件大小: 790K
代理商: TPA701DGNRG4
TPA701
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS229D – NOVEMBER1998 – REVISED MAY 2003
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
component selection (continued)
As an example consider an input resistance of 10 k
and a feedback resistor of 50 k. The BTL gain of the
amplifier would be –10 V/V and the effective impedance at the inverting terminal would be 8.3 k
, which is well
within the recommended range.
For high performance applications, metal film resistors are recommended because they tend to have lower
noise levels than carbon resistors. For values of RF above 50 k, the amplifier tends to become unstable due
to a pole formed from RF and the inherent input capacitance of the MOS input structure. For this reason, a small
compensation capacitor of approximately 5 pF should be placed in parallel with RF when RF is greater than
50 k
. This, in effect, creates a low pass filter network with the cutoff frequency defined in equation 7.
(7)
–3 dB
fc
f
c(lowpass) +
1
2
pR
F
C
F
For example, if RF is 100 k and CF is 5 pF, then fco is 318 kHz, which is well outside of audio range.
input capacitor, CI
In the typical application an input capacitor, CI, is required to allow the amplifier to bias the input signal to the
proper dc level for optimum operation. In this case, CI and RI form a high-pass filter with the corner frequency
determined in equation 8.
(8)
–3 dB
fc
f
c(highpass) +
1
2
pR
I
C
I
The value of CI is important to consider as it directly affects the bass (low frequency) performance of the circuit.
Consider the example where RI is 10 k and the specification calls for a flat bass response down to 40 Hz.
Equation 8 is reconfigured as equation 9.
(9)
C
I +
1
2
pR
I
fc
相关PDF资料
PDF描述
TPA711D 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA711DGN 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA711DGNR 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA711DR 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA711DGNRG4 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
相关代理商/技术参数
参数描述
TPA701DR 功能描述:音频放大器 700mW Lw V Audio 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
TPA701DRG4 功能描述:音频放大器 700-mW Low-Voltage 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
TPA701EVM 制造商:TI 制造商全称:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
TPA701MSOPEVM 功能描述:音频 IC 开发工具 TPA701MSOP Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V
TPA711 制造商:TI 制造商全称:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER