LT1178

17A Max Supply Current per Amplifier
70V Max Offset Voltage
250pA Max Offset Current
5nA Max Input Bias Current
0.9V_P-P 0.1Hz to 10Hz Voltage Noise
1.5pA_P-P 0.1Hz to 10Hz Current Noise
0.5V/°C Offset Voltage Drift
85kHz Gain-Bandwidth Product
0.04V/s Slew Rate
Single Supply Operation:
    Input Voltage Range Includes Ground
    Output Swings to Ground While Sinking Current
    No Pull Down Resistors are Needed
Output Sources and Sinks 5mA Load Current

Battery or Solar Powered Systems
    Portable Instrumentation
    Remote Sensor Amplifier
    Satellite Circuitry
Micropower Sample-and-Hold
Thermocouple Amplifier
Micropower Filters

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

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.