Describes an op amp or similar whose input or output range extends close to both supply rails. It allows large signal swings in single-supply, low-voltage circuits, although the output still saturates some tens of mV short of the rails depending on load current.
Japanese name: レール・ツー・レール
Rail-to-rail appears in 1 practice question across 1 topic, including How to read datasheets.
Field: How to read datasheets
Answer: C. Correct operation is not guaranteed for inputs above 3.5 V, so a voltage follower cannot handle a 4 V signal
The common-mode input range is the range within which the device amplifies as specified, provided the voltages on both input pins are within it. Here the upper limit is 5 − 1.5 = 3.5 V, so applying 4 V to a voltage follower, where the input voltage is directly the common-mode voltage, causes the output to distort or stick. Outside the range but within the absolute maximum ratings, the device will not be damaged, but operation is not guaranteed. The range over which the output can swing is specified separately as "output voltage swing," and devices usable close to both supply rails are called rail-to-rail.
The range over which the output can swing is specified separately as "output voltage swing," and devices usable close to both supply rails are called rail-to-rail.
The datasheet of an op-amp used on a single 5 V supply give…As an Amazon Associate I earn from qualifying purchases.
Operational amplifier (op-amp) Voltage follower Absolute maximum ratings 5 V tolerant Allowable power dissipation Derating Dropout voltage Errata Exposed pad Input offset voltage