• Product introduction

LT1178S8

17μA maximum, dual and quad, single supply, precision operational amplifier

peculiarity

• 17μA maximum supply current per amplifier
• 70μV maximum offset voltage
• 250pA maximum bias current
• 5nA maximum input bias current
• 0.9μVp-P 0.1Hz to 10Hz voltage noise
• 1.5pAp - P 0.1Hz to 10Hz current noise
• Offset voltage drift of 0.5μV/°C
• 85kHz gain bandwidth product
• 0.04V/μs slew rate
• Single-supply operation
• The input voltage range includes ground potential
• Output swing while sinking current to ground
• There is no pull-down resistor
• Output source and sink 5 mA load current

description

™The LT 1178 is a micropower dual op amp in a standard 8-pin configuration, and the LT1179 is a microquad op amp that is available in a standard 14-pin package. Both devices are optimized for single-supply operation at 5V. Specifications also provide ± 15V power supply.

Very low supply current combined with true precision specifications: offset voltage of 30μV and offset currentis 50pA. These two offset parameters drift low with temperature. 1.5pAp-P current noise and picoampere cancellation currently allow the use of source resistors in the megohm-range range without causing serious errors. The voltage noise, 0.9μVp-P, is a very low supply current.

The LT1178 and LT1179 can operate from a single supply (one lithium battery or two nickel-cadmium batteries). The input range is below ground. All NPN output stages fluctuate within a few millivolts to ground, and sinking currentno power dissipation pull-down resistors is necessary.

Three times higher supply current is acceptable, single micro LT1077, LT1078 dual and LT1079 quad recommended. The LT1077/78/79 have significantly higher bandwidth, slew rate, low voltage noise and better output drive capability.