Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp

The LT1782 is a 200kHz op amp available in the small SOT-23 package that operates on all single and split supplies with a total voltage of 2.5V to 18V. The amplifier draws less than 55μA of quiescent current and has reverse battery protection, drawing negligible current for reverse supply voltages up to 18V.

The input range of the LT1782 includes ground, and a unique feature of this device is its Over-The-Top™ operation capability with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring even when the inputs are 9V below the negative supply.

The LT1782 can drive loads up to 18mA and still maintain rail-to-rail capability. A shutdown feature on the 6-lead version can disable the part, making the output high impedance and reducing quiescent current to 5μA. The LT1782 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring higher speed, refer to the LT1783.

Applications

* Portable Instrumentation

* Battery- or Solar-Powered Systems

* Sensor Conditioning

* Supply Current Sensing

* Battery Monitoring

* MUX Amplifiers

* 4mA to 20mA Transmitters

* Operates with Inputs Above V+

* Rail-to-Rail Input and Output

* Micropower: 55μA Supply Current Max

* Operating Temperature Range: –40°C to 125°C

* Low Profile (1mm) ThinSOT™ Package

* Low Input Offset Voltage: 800μV Max

* Single Supply Input Range: 0V to 18V

* High Output Current: 18mA Min

* Specified on 3V, 5V and ±5V Supplies

* Output Shutdown on 6-Lead Version

* Reverse Battery Protection to 18V

* High Voltage Gain: 1500V/mV

* Gain Bandwidth Product: 200kHz

* Slew Rate: 0.07V/μs