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1、CA3140高输入阻抗运算放大器,是美圜无线电公司研制开发的一种BiMOS运算放大器在一片集成芯片上，它结合了压电PMOS晶体管工艺和高电压双授晶体管的优点.(互补对称金属氧化物半导体)卓越性能的运放. 功能简介：电源电压218V。开环电压100dB。输入偏置电流5pA。转换速率9V。输出电压13V.引脚功能： 1脚OFFSET NULL 偏置（条令端） 2脚INV.INPUT 反向输入端 3脚NON-INV INPUT 同向输入端 4脚V- 电源- 5脚OFFSET NULL 偏置（条令端） 6脚OUTPUT 输出 7脚V+ 电源+ 8脚STROBE 选通端CA3140引脚图极限参数：直流电
2、源电压（V+和V -端子）36V最大存储温度范围-65 to 150差模输入电压8最大结温（塑料封装）150直流输入电压(V+ +8V) To (V- -0.5V)最大结温（金属罐封装）175输入端电流1mA温度范围-55 to 125输出短路持续时间（注2 ）无限期1. JA is measured with the component mounted on an evaluation PC board in free air.2. Short circuit may be applied to ground or to either supply.电气规格 VSUPPLY =15V, TA
3、=25PARAMETER 参数SYMBOL 符号TEST CONDITIONS 测试条件TYPICAL VALUES 典型值UNITS 单位CA3140CA3140AInput Offset Voltage Adjustment Resistor 输入失调电压调整电阻4、5号端子或4、1号端子之间电阻典型值，以调整最大失调电压4.718kInput Resistance 输入电阻RI-1.51.5TInput Capacitance 输入电容CI-44pFOutput Resistance 输出电阻RO-6060Equivalent Wideband Input Noise Voltage(宽
4、带等效输入噪声电压eNBW = 140kHz, RS = 1M4848VEquivalent Input Noise Voltage等效输入噪声电压(见图35)eNRS = 100f = 1kHz4040nV/Hzf = 10kHz1212nV/HzShort Circuit Current to Opposite Supply 短路电流相反供应IOM+Source拉(电流)4040mAIOM-Sink灌电流1818mAGain-Bandwidth Product增益带宽-乘积(见图15，30)fT-4.54.5MHzSlew Rate,转换速率(见图31)SR-99V/sSink Curre
5、nt From Terminal 8 To Terminal 4 to Swing Output Low端子8流入端子4的灌电流将输出变为低电平-220220ATransient ResponsetrRL=2k CL=100pF上升时间0.080.08sOS过冲电压1010%Settling Time at 建立时间在10VP-P(见图7)tSRL=2k CL=100pF电压跟随To 1mV4.54.5sTo 10mV1.41.4s电气规格的设备设计VSUPPLY = 15V, TA = 25PARAMETER 参数SYMBOL 符号CA3140 数值CA3140A 数值UNITS 单位最小典
6、型最大最小典型最大Input Offset Voltage输入失调电压|VIO|-515-25mVInput Offset Current输入失调电流|IIO|-0.530-0.520pAInput Current 输入电流II-1050-1040pALarge Signal Voltage Gain大信号电压增益(注3)(见图15，29)AOL20100-20100-kV/V86100-86100-dBCommon Mode Rejection Ratio 共模抑制比(见图34)CMRR-32320-32320V/V7090-7090-dBCommon Mode Input Voltage
7、Range共模输入电压范围(见图16A 16B)VICR-15-15.5to+12.511-15-15.5to+12.512VPower-Supply Rejection Ratio, VIO/VS 电源抑制比(见图36 )PSRR-100150-100150V/V7680-7680-dBMax Output Voltage 最大输出电压(注4)(见图2，16A 16B)VOM+1213-+1213-VVOM-14-14.4-14-14.4-VSupply Current电源电流(见图32)I+-46-46mADevice Dissipation 耗散功率PD-120180-120180mWI
8、nput Offset Voltage Temperature Drift 输入失调电压温度漂移VIO/T-8-6-V/3. At Vo = 26VP-P, +12V, -14V and RL = 2k.4. At RL = 2k电气规格的设计指导V+=5V, V-=0V, TA =25PARAMETER 参数SYMBOL 符号TYPICAL VALUES 典型值UNITS 单位CA3140数值CA3140A数值Input Offset Voltage 输入失调电压|VIO|52mVInput Offset Current 输入失调电流|IIO|0.10.1pAInput Current 输入
9、电流II22pAInput Resistance 输入电阻RI11TLarge Signal Voltage Gain大信号电压增益(见图15，29)AOL100100kV/V100100dBCommon Mode Rejection Ratio 共模抑制比CMRR3232V/V9090dBCommon Mode Input Voltage Range共模输入电压范围(见图16A 16B)VICR-0.5-0.5V2.62.6VPower Supply Rejection Ratio 电源抑制比PSRR VIO/VS100100V/V8080dBMaximum Output Voltage最大
10、输出电压(见图2,16A 16B)VOM+33VVOM-0.130.13VMaximum Output Current:最大输出电流SourceIOM+1010mASinkIOM-11mASlew Rate 压摆率(见图31)SR77V/sGain-Bandwidth Product增益带宽-乘积(见图30)fT3.73.7MHzSupply Current电源电流(见图32 )I+1.61.6mADevice Dissipation 耗散功率PD88mWSink Current from Terminal 8to Terminal 4to Swing Output Low端子8流入端子4的灌电流将输出变为低电平-200200A 图24 稳压电源路图25稳压电源“折返”电流限制电路图28 采样和保持电路图39 基本电流放大器的低电流测量系统
