The LT®1178 is a micropower dual op amp in the standard 8-pin configuration; the LT1179 is a micropower quad op amp offered in the standard 14-pin packages. Both devices are optimized for single supply operation at 5V. Specifications are also provided at ±15V supplies.
The extremely low supply current is combined with true precision specifications: offset voltage is 30V, offset current is 50pA. Both offset parameters have low drift with temperature. The 1.5pAp-p current noise and picoampere offset current permit the use of megaohm level source resistors without introducing serious errors. Voltage noise, at 0.9Vp-p, is remarkably low considering the low supply current.
Both the LT1178 and LT1179 can be operated from a single supply (as low as one lithium cell or two NiCd batteries). The input range goes below ground. The all-NPN output stage swings to within a few millivolts of ground while sinking current-no power consuming pull down resistors are needed.
For applications where three times higher supply current is acceptable, the micropower LT1077 single, LT1078 dual and LT1079 quad are recommended. The LT1077/78/79 have significantly higher bandwidth, slew rate, lower voltage noise and better output drive capability.
Supply Voltage ...................................................... ±22V
Differential Input Voltage ...................................... ±30V
Input Voltage ............... Equal to Positive Supply Voltage
Input Voltage ............5V Below Negative Supply Voltage
Output Short-Circuit Duration .......................... Indefinite
Operating Temperature Range
LT1178I/LT1179I ................................ 40°C to 85°C
LT1178C/LT1178S/LT1179C/LT1179S .......0°C to 70°C
Storage Temperature Range ............ 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)............... 300°C