AD705JN

PRODUCT DESCRIPTION The AD705 is a low power bipolar op amp that has the low input bias current of a BiFET amplifier but which offers a significantly lower IB drift over temperature. The AD705 offers many of the advantages of BiFET and bipolar op amps without their inherent disadvantages. It utilizes superbeta bipolar input transistors to achieve the picoampere input bias current levels of FET input amplifiers (at room temperature), while its IB typically only increases 5 times vs. BiFET amplifiers which exhibit a 1000X increase over temperature. This means that, at room temperature, while a typical BiFET may have less IB than the AD705, the BiFET’s input current will increase to a level of several nA at +125°C. Superbeta bipolar technology also permits the AD705 to achieve the microvolt offset voltage and low noise characteristics of a precision bipolar input amplifier.FEATURES DC PERFORMANCE 25 mV max Offset Voltage (AD705T) 0.6 mV/8C max Drift (AD705K/T) 100 pA max Input Bias Current (AD705K) 600 pA max IB Over MIL Temperature Range (AD705T) 114 dB min CMRR (AD705K/T) 114 dB min PSRR (AD705T) 200 V/mV min Open Loop Gain 0.5 mV p-p typ Noise, 0.1 Hz to 10 Hz 600 mA max Supply CurrentAC PERFORMANCE 0.15 V/µs Slew Rate 800 kHz Unity Gain Crossover Frequency 10,000 pF Capacitive Load Drive Capability Low Cost Available in 8-Pin Plastic Mini-DlP, Hermetic Cerdip and Surface Mount (SOIC) Packages MIL-STD-883B Processing Available Dual Version Available: AD706 Quad Version: AD704APPLICATIONS Low Frequency Active Filters Precision Instrumentation Precision Integrators

Key Features

• DC PERFORMANCE
• 25 mV max Offset Voltage (AD705T)
• 0.6 mV/8C max Drift (AD705K/T)
• 100 pA max Input Bias Current (AD705K)
• 600 pA max IB Over MIL Temperature Range (AD705T)
• 114 dB min CMRR (AD705K/T)
• 114 dB min PSRR (AD705T)
• 200 V/mV min Open Loop Gain
• 0.5 mV p-p typ Noise, 0.1 Hz to 10 Hz
• 600 mA max Supply Current