特点
17μA Max Supply Current per Amplifier
70μV Max Offset Voltage
250pA Max Offset Current
5nA Max Input Bias Current
0.9μVp-p 0.1Hz to 10Hz Voltage Noise
1.5pAp-p 0.1Hz to 10Hz Current Noise
0.5μV/°C Offset Voltage Drift
85kHz Gain-Bandwidth-Product
0.04V/μs 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
典型应用
典型应用
描述
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 30μV, offset currentis 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 0.9μVp-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.