lm358内部电路图
lm358内部电路图
The LM258 series is made using two internally
compensated, two–stage operational amplifiers. The first
stage of each consists of differential input devices Q20 and
Q18 with input buffer transistors Q21 and Q17 and the
differential to single ended converter Q3 and Q4. The first
stage performs not only the first stage gain function but also
performs the level shifting and transconductance reduction
functions. By reducing the transconductance, a smaller
compensation capacitor (only 5.0 pF) can be employed, thus
saving chip area. The transconductance reduction is
accomplished by splitting the collectors of Q20 and Q18.
Another feature of this input stage is that the input common
mode range can include the negative supply or ground, in
single supply operation, without saturating either the input
devices or the differential to single–ended converter. The
second stage consists of a standard current source load
amplifier stage.
Each amplifier is biased from an internal–voltage regulator
which has a low temperature coefficient thus giving each
amplifier good temperature characteristics as well as
excellent power supply rejection.
lm358中文资料pdf:
LM358 内部**括有两个独立的、高增益、内部频率补偿的双运算放大器，适
合于电源电压范围很宽的单电源使用，也适用于双电源工作模式，在推荐的工
作条件下，电源电流与电源电压无关。它的使用范围**括传感放大器、直流增
益模块和其他所有可用单电源供电的使用运算放大器的场合。
LM358 的封装形式有塑封8引线双列直插式和贴片式。
特性(Features):
· 内部频率补偿
· 直流电压增益高(约100dB)
· 单位增益频带宽(约1MHz)
· 电源电压范围宽：单电源(3—30V)；
双电源(±1.5 一±15V)
· 低功耗电流，适合于电池供电
· 低输入偏流
· 低输入失调电压和失调电流
· 共模输入电压范围宽，**括接地
· 差模输入电压范围宽，等于电源电压范围
· 输出电压摆幅大(0 至Vcc-1.5V)
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