2.5MHz, Over-The-Top Low Power, Rail-to-Rail Input and Output Op Amp in SOT-23

The LT1784 is a 2.5MHz 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 750µA of quiescent current and has reverse battery protection, drawing negligible current for reverse supply voltages up to 18V.

The input range of the LT1784 includes ground, and a unique feature of this device is its Over-The-Top® operation capabilitity 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 LT1784 can drive loads up to 15mA 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 LT1784 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring lower power, refer to the LT1782 and LT1783 data sheets.

Applications

* Portable Instrumentation

* Battery-Powered Systems

* Sensor Conditioning

* Supply Current Sensing

* MUX Amplifiers

* 4mA to 20mA Transmitters

* Operates with Inputs Above V+

* Rail-to-Rail Input and Output

* Gain Bandwidth Product: 2.5MHz

* Slew Rate: 2.1V/µs

* Low Input Offset Voltage: 3.5mV Max

* High Voltage Gain: 1000V/mV

* Single Supply Input Range: 0V to 18V

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

* Reverse Battery Protection to 18V

* Low Power: 750µA Supply Current Max

* Output Shutdown on 6-Lead Version

* High Output Current: 15mA Min

* Operating Temperature Range: –40°C to 85°C

* Low Profile (1mm) ThinSOT™ Package