避免噪音和未使用的运算放大器的电源问题

摘要： 如果连接不当，未提交的运放导致功耗增加等问题并添加噪音。本应用指南说明如何正确终止未提交的运算放大器。
Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS

Keywords: uncommitted op amp, uncommitted operational amplifier, unused op amp, unused operational Mar 25, 2003
amplifier, quad op amp, uncommitted, unused, opamp

APPLICATION NOTE 1957
Avoiding Noise and Power Problems with Unused Op Amps

Abstract: If connected improperly, an uncommitted op amp leads to problems such as increased power
consumption and added noise. This application note shows how to properly terminate an uncommitted op amp.


Sometimes there are one or more unused operational amplifiers (op amps) in a circuit design. For example,
Figure 2 of Application Note 994: Reference Voltage for Multiple ADCs uses three of the four op amps in the
MAX4254 to drive the reference inputs of an ADC. Unused op amps in this situation