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参数资料
| 型号： | THS3115IPWPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO14 |
| 封装： | GREEN, PLASTIC, HTSSOP-14 |
| 文件页数： | 5/35页 |
| 文件大小： | 1215K |
| 代理商： | THS3115IPWPRG4 |
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49.9 W
1
F
m
100-
Load
W
+V
S
+V
S
R
G
-V
S
R
F
R
5.11
ISO
W
49.9 W
1
F
m
100-
Load
W
+V
S
+V
S
R
G
-V
S
R
F
5.11 W
27pF
750 W
R
IN
49.9 W
1
F
m
100-
Load
W
+V
S
+V
S
R
G
-V
S
R
F
Ferrite
Bead
49.9 W
1
F
m
100-
Load
W
+V
S
+V
S
R
G
-V
S
R
F
5.11 W
27pF
Ferrite
Bead
F
IN
www.ti.com
SLOS385C – SEPTEMBER 2001 – REVISED SEPTEMBER 2010
Placing a small series resistor, RISO, between the
Figure 46 shows another method used to maintain
amplifier output and the capacitive load, as shown in
the low-frequency load independence of the amplifier
Figure 44, is an easy way of isolating the load
while isolating the phase shift caused by the
capacitance.
capacitance at high frequency. At low frequency,
feedback is mainly from the load side of RISO. At high
frequency, the feedback is mainly via the 27-pF
capacitor. The resistor RIN in series with the negative
input is used to stabilize the amplifier and should be
equal to the recommended value of RF at unity gain.
Replacing RIN with a ferrite of similar impedance at
about 100 MHz as shown in Figure 47 gives similar
results with reduced dc offset and low frequency
noise.
Figure 44. Resistor to Isolate Capacitive Load
shows, is another approach of isolating the output of
the amplifier. The ferrite impedance characteristic
versus frequency is useful to maintain the low
frequency load independence of the amplifier while
isolating the phase shift caused by the capacitance at
high frequency. Use a ferrite with similar impedance
to RISO, 20 Ω to 50 Ω, at 100 MHz and low
Figure 46. Feedback Technique with Input
impedance at dc.
Resistor for Capacitive Load
Figure 45. Ferrite Bead to Isolate Capacitive Load
Figure 47. Feedback Technique with Input Ferrite
Bead for Capacitive Load
Copyright 2001–2010, Texas Instruments Incorporated
13
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| THS3120 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW-NOISE, HIGH-OUTPUT DRIVE, CURRENT-FEEDBACK, OPERATIONAL AMPLIFIERS |
| THS3120CD | 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 |
| THS3120CDG4 | 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 |
| 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 |
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