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参数资料
| 型号： | THS3111IDRG4 |
| 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, SOIC-8 |
| 文件页数： | 11/37页 |
| 文件大小： | 980K |
| 代理商： | THS3111IDRG4 |
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_
+
VS
-VS
49.9
5.11
1
F
200
VS
27 pF
806
RF
RG
FB
100
LOAD
FIN
_
+
VS
-VS
_
+
VS
-VS
VS
301
301
66.5
5.11
5.11
_
+
VS
-VS
806
5.11
200
VS
_
+
VS
-VS
806
5.11
200
24.9
24.9
1 nF
www.ti.com........................................................................................................................................ SLOS422E – SEPTEMBER 2003 – REVISED OCTOBER 2009
Figure 61 shows a push-pull FET driver circuit typical
of ultrasound applications with isolation resistors to
isolate the gate capacitance from the amplifier.
Figure 59. Feedback Technique with Input Ferrite
Bead for Capacitive Load
Figure 60 shows how to use 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 61. PowerFET Drive Circuit
faster like when driving large FET transistors.
SAVING POWER WITH POWER-DOWN
FUNCTIONALITY AND SETTING
THRESHOLD LEVELS WITH THE
REFERENCE PIN
The THS3110 features a power-down pin (PD) which
lowers the quiescent current from 4.8 mA down to
270
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 60. 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.
Copyright 2003–2009, Texas Instruments Incorporated
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS3112 | 制造商:BB 制造商全称:BB 功能描述:LOW-NOISE, HIGH-SPEED CURRENT FEEDBACK AMPLIFIERS |
| THS3112CD | 功能描述:高速运算放大器 Dual Lo-Noise High Output Current 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 |
| THS3112CDDA | 功能描述:高速运算放大器 Dual Lo-Noise High Output Current 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 |
| THS3112CDDAG3 | 功能描述:高速运算放大器 Dual Lo-Noise High Output Current 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 |
| THS3112CDDAR | 功能描述:高速运算放大器 Dual Lo-Noise High Output Current 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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