Dual Precision Rail-to-Rail Input and Output Op Amps

The LT1366/LT1367/LT1368/LT1369 are dual and quad bipolar op amps which combine rail-to-rail input and output operation with precision specifications. These op amps maintain their characteristics over a supply range of 1.8V to 36V. Operation is specified for 3V, 5V and ±15V supplies. Input offset voltage is typically 150μV, with an open-loop gain AVOL of 1 million while driving a 10k load. Common mode rejection is typically 90dB over the full rail-to-rail input range, and supply rejection is 110dB.

The LT1366/LT1367 have conventional compensation which assures stability for capacitive loads of 1000pF or less. The LT1368/LT1369 have compensation that requires a 0.1μF output capacitor, which improves the amplifier’s supply rejection and reduces output impedance at high frequencies. The output capacitor’s filtering action reduces high frequency noise, which is beneficial when driving A/D converters.

The LT1366/LT1368 are available in plastic 8-pin PDIP and 8-lead SO packages with the standard dual op amp pinout. The LT1367/LT1369 feature the standard quad pinout, which is available in a plastic 14-lead SO package. These devices can be used as plug-in replacements for many standard op amps to improve input/output range and precision.

Applications

* Rail-to-Rail Buffer Amplifiers

* Low Voltage Signal Processing

* Supply Current Sensing at Either Rail

* Driving A/D Converters

* Input Common Mode Range Includes Both Rails

* Output Swings Rail-to-Rail

* Low Input Offset Voltage: 150μV

* High Common Mode Rejection Ratio: 90dB

* High AVOL: >1V/μV Driving 10k Load

* Low Input Bias Current: 10nA

* Wide Supply Range: 1.8V to ±15V

* Low Supply Current: 375μA per Amplifier

* High Output Drive: 30mA

* 400kHz Gain-Bandwidth Product

* Slew Rate: 0.13V/μs

* Stable for Capacitive Loads Up to 1000pF