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参数资料
| 型号： | THS3120CDG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 10/35页 |
| 文件大小： | 975K |
| 代理商： | THS3120CDG4 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第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页第33页第34页第35页
_
+
VS
-VS
49.9
5.11
1
F
124
VS
27 pF
499
RF
RG
FB
100
LOAD
FIN
_
+
VS
-VS
_
+
VS
-VS
VS
301
301
66.5
5.11
5.11
_
+
VS
-VS
499
5.11
124
VS
_
+
VS
-VS
499
5.11
124
24.9
24.9
1 nF
SLOS420E – SEPTEMBER 2003 – REVISED OCTOBER 2009........................................................................................................................................ www.ti.com
Figure 57 shows a push-pull FET driver circuit typical
of ultrasound applications with isolation resistors to
isolate the gate capacitance from the amplifier.
Figure 55. Feedback Technique with Input Ferrite
Bead for Capacitive Load
Figure 56 is shown using two amplifiers in parallel to
double the output drive current to larger capacitive
loads. This technique is used when more output
current is needed to charge and discharge the load
Figure 57. PowerFET Drive Circuit
faster as when driving large FET transistors.
SAVING POWER WITH POWER-DOWN
FUNCTIONALITY AND SETTING
THRESHOLD LEVELS WITH THE
REFERENCE PIN
The THS3120 features a power-down pin (PD) which
lowers the quiescent current from 7 mA down to
300
μA, ideal for reducing system power.
The power-down pin of the amplifier defaults to the
REF pin voltage in the absence of an applied voltage,
putting the amplifier in the normal on mode of
operation. To turn off the amplifier in an effort to
conserve power, the power-down pin can be driven
towards the positive rail. The threshold voltages for
power-on and power-down are relative to the supply
Figure 56. Parallel Amplifiers for Higher Output
rails and are given in the specification tables. Below
Drive
the Enable Threshold Voltage, the device is on.
Above the Disable Threshold Voltage, the device is
off. Behavior in between these threshold voltages is
not specified.
Note that this power-down functionality is just that;
the amplifier consumes less power in power-down
mode. The power-down mode is not intended to
provide a high-impedance output. In other words, the
power-down functionality is not intended to allow use
as a 3-state bus driver. When in power-down mode,
the impedance looking back into the output of the
amplifier is dominated by the feedback and gain
setting resistors, but the output impedance of the
device itself varies depending on the voltage applied
to the outputs.
18
Copyright 2003–2009, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS3120CDGN | 功能描述:高速运算放大器 Single Lo-Noise Hi-Output RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| THS3120CDGNG4 | 功能描述:高速运算放大器 Single Lo-Noise Hi-Output RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| THS3120CDGNR | 功能描述:高速运算放大器 Single Lo-Noise Hi-Output RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| THS3120CDGNRG4 | 功能描述:高速运算放大器 Single Lo-Noise Hi-Output RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| THS3120CDR | 功能描述:高速运算放大器 Single Lo-Noise Hi-Output RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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