ZHCSHF9E February 2007 – January 2018 INA270 , INA271
PRODUCTION DATA.
The –16-V to +80-V common-mode range of the INA270 and INA271 is ideal for withstanding automotive fault conditions ranging from 12-V battery reversal up to +80-V transients because no additional protective components are needed up to those levels. In the event that the INA270 and INA271 are exposed to transients on the inputs in excess of their ratings, external transient absorption with semiconductor transient absorbers (zeners or Transzorbs) are necessary.
Use of MOVs or VDRs is not recommended except when they are used in addition to a semiconductor transient absorber. Select the transient absorber such that it never allows the INA270 and INA271 to be exposed to transients greater than 80 V (that is, allow for transient absorber tolerance, as well as additional voltage because of transient absorber dynamic impedance). Despite the use of internal zener-type ESD protection, the INA270 and INA271 are not suited to using external resistors in series with the inputs because the internal gain resistors can vary up to ±30%, but are tightly matched (if gain accuracy is not important, then resistors can be added in series with the INA270 and INA271 inputs with two equal resistors on each input).