LT1782 Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp FEATURESDESCRIPTION n Operates with Inputs Above V+ The LT®1782 is a 200kHz op amp available in the small n Rail-to-Rail Input and Output SOT-23 package that operates on all single and split sup- n Micropower: 55µA Supply Current Max plies with a total voltage of 2.5V to 18V. The amplifier n Operating Temperature Range: –40°C to 125°C draws less than 55µA of quiescent current and has reverse n Low Profile (1mm) ThinSOT™ Package battery protection, drawing negligible current for reverse n Low Input Offset Voltage: 800µV Max supply voltages up to 18V. n Single Supply Input Range: 0V to 18V The input range of the LT1782 includes ground, and a n High Output Current: 18mA Min unique feature of this device is its Over-The-Top™ opera- n Specified on 3V, 5V and ±5V Supplies tion capability with either or both of its inputs above the n Output Shutdown on 6-Lead Version positive rail. The inputs handle 18V both differential and n Reverse Battery Protection to 18V common mode, independent of supply voltage. The input n High Voltage Gain: 1500V/mV stage incorporates phase reversal protection to prevent n Gain Bandwidth Product: 200kHz false outputs from occurring even when the inputs are 9V n Slew Rate: 0.07V/µs below the negative supply. The LT1782 can drive loads up to 18mA and still maintain APPLICATIONS rail-to-rail capability. A shutdown feature on the 6-lead n version can disable the part, making the output high Portable Instrumentation n impedance and reducing quiescent current to 5µA. The Battery- or Solar-Powered Systems n LT1782 op amp is available in the 5- and 6-lead SOT-23 Sensor Conditioning n packages. For applications requiring higher speed, refer Supply Current Sensing n to the LT1783. Battery Monitoring n MUX Amplifiers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. All other n 4mA to 20mA Transmitters trademarks are the property of their respective owners. TYPICAL APPLICATIONPositive Supply Rail Current SenseDistribution of Input Offset Voltage 25 V+ VS = 5V, 0V 5V TO 18V VCM = 2.5V 200Ω 20 5V 15 0.2Ω + LT1782 MMBT3904 200Ω 10 – VOUT = 2Ω(ILOAD) 0V TO 4.3V 5 LOAD I PERCENTAGE OF AMPLIFIERS LOAD 2k 1782 TA01a 0–900 –600 –300 0 300 600 900 INPUT OFFSET VOLTAGE (µV) 1782 TA01b 1782fc 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Applications Information Simplified Schematic Typical Applications Package Description Revision History Typical Application Related Parts
