LT1077 Micropower, Single Supply, Precision Op Amp UFEATURESDESCRIPTIO ■ 60µA Max Supply Current The LT®1077 is a micropower precision operational ■ 40µV Max Offset Voltage amplifier optimized for single supply operation at 5V. In ■ 350pA Max Offset Current addition, ±15V specifications are provided. ■ 0.5µVP-P 0.1Hz to 10Hz Voltage Noise Micropower performance of competing devices is ■ 2.5pAP-P 0.1Hz to 10Hz Current Noise achieved at the expense of seriously degrading precision, ■ O.4µV/°C Offset Voltage Drift noise, speed, and output drive specifications. The LT1077 ■ 250kHz Gain-Bandwidth Product reduces supply current without sacrificing other parameters. The offset voltage achieved is the lowest ■ 0.12V/µs Slew Rate of any micropower op amp. Offset current, voltage ■ Single Supply Operation and current noise, slew rate and gain-bandwidth product Input Voltage Range Includes Ground are all two to ten times better than on previous micropower Output Swings to Ground while Sinking Current op amps. No Pull-Down Resistors are Needed The 1/f corner of the voltage noise spectrum is at 0.7Hz. ■ Output Sources and Sinks 5mA Load Current This results in low frequency (0.1Hz to 10Hz) noise U performance which can only be found on devices with an APPLICATIO S order of magnitude higher supply current. The LT1077 is completely plug-in compatible (including ■ Replaces OP-07, OP-77, AD707, LT1001, LT1O12 nulling) with all industry standard precision op amps. at 10 to 60 Times Lower Power Thus, it can replace these precision op amps in many ■ Battery or Solar Powered Systems applications without sacrificing performance, yet with ■ 4mA to 2OmA Current Loops significant power savings. ■ Two Terminal Current Source The LT1077 can be operated from one lithium cell or two ■ Megaohm Source Resistance Difference Amplifier Ni-Cad batteries. The input range goes below ground. The , LTC and LT are registered trademarks of Linear Technology Corporation. all-NPN output stage swings to ground while sinking current—no pull-down resistors are needed. For dual and quad op amps with similar specifications please see the LT1078/LT1079 datasheet. UDistribution of Input Offset VoltageTYPICAL APPLICATIO 35 Self Buffered Micropower Reference VS = 5V, 0V 30 TA = 25°C 3.6V TO 9V 1072 UNITS 25 TESTED IN 2 7 – H, J8, N8 OUTPUT 6 PACKAGES 1.230V 20 LT1077 ±1.2% MAX 3 + 15 4 SUPPLY CURRENT = 60µA MAX PERCENT OF UNITS SOURCES UP TO 10mA 10 750k LT1034 LOAD REGULATION = 30µV/mA 0.1µF 1.2V TEMPERATURE DRIFT = 12ppm/°C 5 LT1077 • TA01 0 –40 –30 –20 –10 0 10 20 30 40 INPUT OFFSET VOLTAGE (µV) LT1077 • TA02 1077fa 1
