参数资料
| 型号： | THS4032CDR |
| 厂商： | Texas Instruments |
| 文件页数： | 16/47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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_
+
RF
RS
RG
eRg
eRf
eRs
en
IN+
Noiseless
IN
eni
eno
e
ni +
en
2
) IN )
R
S
2
) IN–
R
F
R
G
2
) 4 kTRs ) 4 kT RF RG
Where:
k = Boltzmann’s constant = 1.380658
× 1023
T = Temperature in degrees Kelvin (273 +
°C)
RF || RG = Parallel resistance of RF and RG
eno + eni AV + eni 1 )
R
F
R
G
(Noninverting Case)
www.ti.com
SLOS224G – JULY 1999 – REVISED MARCH 2010
NOISE CALCULATIONS AND NOISE FIGURE
Noise can cause errors on very small signals. This is especially true when amplifying small signals. The noise
model for the THS403x, shown in Figure 52, includes all of the noise sources as follows:
en = Amplifier internal voltage noise (nV/√Hz)
IN+ = Noninverting current noise (pA/
√Hz)
IN– = Inverting current noise (pA/
√Hz)
eRx = Thermal voltage noise associated with each resistor (eRx = 4 kTRx)
Figure 52. Noise Model
The total equivalent input noise density (eni) is calculated by using the following equation:
(1)
To get the equivalent output noise of the amplifier, just multiply the equivalent input noise density (eni) by the
overall amplifier gain (AV).
(2)
As the previous equations show, to keep noise at a minimum, small-value resistors should be used. As the
closed-loop gain is increased (by reducing RG), the input noise is reduced considerably because of the parallel
resistance term. This leads to the general conclusion that the most dominant noise sources are the source
resistor (RS) and the internal amplifier noise voltage (en). Because noise is summed in a root-mean-squares
method, noise sources smaller than 25% of the largest noise source can be effectively ignored. This advantage
can greatly simplify the formula and make noise calculations much easier to calculate.
For more information on noise analysis, refer to the application note, Noise Analysis for High-Speed Op Amps
Copyright 1999–2010, Texas Instruments Incorporated
23
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相关代理商/技术参数 |
参数描述 |
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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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