LT1783 1.25MHz, Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amp in SOT-23 FEATURESDESCRIPTION n Operates with Inputs Above V+ The LT®1783 is a 1.25MHz op amp available in the small n Rail-to-Rail Input and Output SOT-23 package that operates on all single and split supplies n Micropower: 300μA Supply Current Max with a total voltage of 2.5V to 18V. The amplifi er draws less n Operating Temperature Range: –40°C to 125°C than 300μA of quiescent current and has reverse-battery n Gain Bandwidth Product: 1.25MHz protection, drawing negligible current for reverse supply n Slew Rate: 0.42V/μs voltages up to 18V. n Low Input Offset Voltage: 800μV Max The input range of the LT1783 includes ground, and a n Single Supply Input Range: 0V to 18V unique feature of this device is its Over-The-Top® opera- n High Output Current: 18mA Min tion capabilitity with either or both of its inputs above the n Specifi ed on 3V, 5V and ±5V Supplies positive rail. The inputs handle 18V both differential and n Output Shutdown on 6-Lead Version common mode, independent of supply voltage. The input n Reverse-Battery Protection to 18V stage incorporates phase reversal protection to prevent n High Voltage Gain: 1500V/mV false outputs from occurring even when the inputs are 9V n Low Profi le (1mm) ThinSOT™ Package below the negative supply. The LT1783 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 LT1783 op amp is available in the 5- and 6-lead SOT-23 Sensor Conditioning n packages. For applications requiring lower power, refer Supply Current Sensing n to the LT1782. Battery Monitoring n MUX Amplifi ers L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered n 4mA to 20mA Transmitters trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other 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 + LT1783 2N3904 200Ω 10 – VOUT = 2Ω(ILOAD) 0V TO 4.3V I LOAD 2k PERCENTAGE OF AMPLIFIERS 5 LOAD 1783 TA01 0 –900 –600 –300 0 300 600 900 INPUT OFFSET VOLTAGE (μV) 1783 TA01b 1783fd 1
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