参数资料
| 型号： | THS4032CDR |
| 厂商： | Texas Instruments |
| 文件页数： | 17/47页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP VFB 100MHZ DUAL 8SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 电压反馈 |
| 电路数： | 2 |
| 转换速率： | 100 V/µs |
| -3db带宽： | 100MHz |
| 电流 - 输入偏压： | 3µA |
| 电压 - 输入偏移： | 500µV |
| 电流 - 电源： | 8.5mA |
| 电流 - 输出 / 通道： | 90mA |
| 电压 - 电源，单路/双路(±)： | 9 V ~ 32 V，±4.5 V ~ 16 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 配用： | 296-10031-ND - EVAL MOD FOR THS4032 |
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_
+
150
VO
VI
50
Ci
300
7
6
2
0
100 k
1 M
10 M
Output
Amplitude
dB
8
9
f Frequency Hz
OUTPUT AMPLITUDE
vs
FREQUENCY
10
100 M
500 M
5
4
3
1
Ci = 10 pF
No Ci
(Stray C Only)
VCC = ± 15 V
Gain = 2
RF = 300
RL = 150
VO(PP) = 0.4 V
300
_
+
360
150
VO
VI
56
Ci
360
1
0
4
6
100 k
1 M
10 M
Output
Amplitude
dB
2
3
f Frequency Hz
OUTPUT AMPLITUDE
vs
FREQUENCY
4
100 M
500 M
1
2
3
5
Ci= 10 pF
No Ci
(Stray C Only)
VCC = ± 15 V
Gain = 1
RF = 360
RL = 150
VO(PP) = 0.4 V
SLOS224G – JULY 1999 – REVISED MARCH 2010
www.ti.com
OPTIMIZING FREQUENCY RESPONSE
Internal frequency compensation of the THS403x was selected to provide very wide bandwidth performance and
still maintain a very low noise floor. In order to meet these performance requirements, the THS403x must have a
minimum gain of 2 (–1). Because everything is referred to the noninverting terminal of an operational amplifier,
the noise gain in a G = –1 configuration is the same as a G = 2 configuration.
One of the keys to maintaining a smooth frequency response, and hence, a stable pulse response, is to pay
particular attention to the inverting terminal. Any stray capacitance at this node causes peaking in the frequency
response (see Figure 53 and Figure 54). Two things can be done to help minimize this effect. The first is to
simply remove any ground planes under the inverting terminal of the amplifier, including the trace that connects
to this terminal. Additionally, the length of this trace should be minimized. The capacitance at this node causes a
lag in the voltage being fed back due to the charging and discharging of the stray capacitance. If this lag
becomes too long, the amplifier will not be able to correctly keep the noninverting terminal voltage at the same
potential as the inverting terminal's voltage. Peaking and possible oscillations will then occur if this happens.
Figure 53.
Figure 54.
The second precaution to help maintain a smooth frequency response is to keep the feedback resistor (Rf) and
the gain resistor (Rg) values fairly low. These two resistors are effectively in parallel when looking at the ac
small-signal response. But, as can be seen in Figure 26 through Figure 37, a value too low starts to reduce the
bandwidth of the amplifier. Table 1 shows some recommended feedback resistors to be used with the THS403x.
Table 1. Recommended Feedback Resistors
GAIN
Rf for VCC = ±15 V and ±5 V
1
50
2
300
–1
360
5
3.3 k
(low stray-c PCB only)
24
Copyright 1999–2010, Texas Instruments Incorporated
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| THS4032CDRG4 | 功能描述:高速运算放大器 100-MHz Low Noise Vltg-Feedback Dual 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 |
| THS4032D | 制造商:TI 制造商全称:Texas Instruments 功能描述:100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4032DGN | 制造商:TI 制造商全称:Texas Instruments 功能描述:100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4032-EP | 制造商:TI 制造商全称:Texas Instruments 功能描述:100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4032EVM | 功能描述:放大器 IC 开发工具 THS4032 Hi-Spd Amp Eval Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
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