一个电阻带热从单电源运算放大器

摘要：为了减少功耗，单电源运算放大器驱动以地为参考的负载，连接一个上拉电阻，输出和正电源电压之间的负载电阻值等于。这除了使运算放大器工作在更高的环境温度和驱动低电阻负载，仅由输出电压和电流（而不是封装的功耗） ，其最大额定值的限制。
Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS

Keywords: single supply, op amp, opamp, application circuit, appnote, app note, opamps, op amps, tutorial, Feb 07, 2003
tutorials

APPLICATION NOTE 1877
One Resistor Takes Heat from Single-Supply Op Amps

Abstract: To minimize the power dissipation in a single-supply op amp, driving a ground-referenced load,
connect a pullup resistor, with value equal to the load resistor between the output and the positive supply
voltage. This addition enables the op amp to operate at higher ambient temperatures and drive lower-
resistance loads, limited only by its maximum ratings for output voltage and current (rather than the package
power dissipation).


To maximize signal swing, the output of a single-supply op amp is usually biased at half the