OP491

Features:

Single-Supply Operation: 2.7 V to 12
Wide Input Voltage Range
Rail-to-Rail Output Swing
Low Supply Current: 300 A/Amp
Wide Bandwidth: 3 MHz
Slew Rate: 0.5 V/s
Low Offset Voltage: 700 mV
No Phase Reversal




Application

Industrial Process Control
Battery Powered Instrumentation
Power Supply Control and Protection
Telecom
Remote Sensors
Low Voltage Strain Gage Amplifiers
DAC Output Amplifier




Pinout






Specifications



Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+16 V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . .GND to VS + 10 V
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . .7 V
Output Short-Circuit Duration to GND . . . . . . . . . . Indefinite
Storage Temperature Range
P, S, RU Packages . . . . . . . . . . . . . . . . . . .65°C to +150°C
Operating Temperature Range
OP191/OP291/OP491G . . . . . . . . . . . . . . .40°C to +125°C
Junction Temperature Range
P, S, RU Packages . . . . . . . . . . . . . . . . . . .65°C to +150°C
Lead Temperature Range (Soldering 60 sec) . . . . . .+300°C




Description

The OP191, OP291 and OP491 are single, dual and quad micropower, single-supply, 3 MHz bandwidth amplifiers fea-turing rail-to-rail inputs and outputs. All are guaranteed to operate from a 3 volt single supply as well as ±5 volt dual
supplies.

Fabricated on Analog Devices' CBCMOS process, the OP191 family has a unique input stage that allows the input voltage to safely extend 10 volts beyond either supply without any phase inversion or latch-up. The output voltage swings to within millivolts of the supplies and continues to sink or source current all the way to the supplies.

Applications for these amplifiers include portable telecom equipment, power supply control and protection, and inter-facefor transducers with wide output ranges. Sensors requiring a rail-to-rail input amplifier include Hall effect, piezo electric, and resistive transducers.

The ability to swing rail-to-rail at both the input and output enables designers to build multistage filters in single-su-pply systems and maintain high signal-to-noise ratios.

The OP191/OP291/OP491 are specified over the extended industrial (40°C to +125°C) temperature range. The OP-191 single and OP291 dual amplifiers are available in 8-pin plastic DIPs and SO surface mount packages. The OP491 quad is available in 14-pin DIPs and narrow 14-pin SO packages. Consult factory for OP491 TSSOP availability.