Datasheet AD8682, AD8684 (Analog Devices)

Dual/Quad Low Power, High Speed JFET Operational Amplifiers AD8682/AD8684 FEATURES PIN CONFIGURATIONS Low supply current: 250 μA/amp maximum OUT A 1 8 V+ High slew rate: 9 V/μs –IN A 2 AD8682 7 OUT B TOP VIEW Bandwidth: 3.5 MHz typical +IN A 3 6 –IN B (Not to Scale)
1 -00
Low offset voltage: 1 mV maximum @ 25°C V– 4 5 +IN B
6278 0
Low input bias current: 20 pA maximum @ 25°C
Figure 1. 8-Lead SOIC_N and 8-Lead MSOP
CMRR: 90 dB typical Fast settling time Unity-gain stable OUT A 1 14 OUT D –IN A 2 13 –IN D APPLICATIONS +IN A 3 12 +IN D Portable telecommunications V+ 4 11 V– AD8684 +IN B 5 10 +IN C Low power industrial and instrumentation –IN B 6 9 –IN C Loop filters OUT B 7 8 OUT C Active and precision filters
02
TOP VIEW
-0
Integrators (Not to Scale)
06278
Strain gauge amplifiers
Figure 2. 14-Lead SOIC_N and 14-Lead TSSOP
Portable medical instrumentation Supply current monitoring GENERAL DESCRIPTION
The AD8682 and AD8684 are dual and quad low power, precision The devices are ideal for portable, low power applications, (1 mV) JFET amplifiers featuring excellent speed at low supply especially with high source impedance. The devices are unity-gain currents. The slew rate is typically 9 V/μs with a supply current stable and can drive higher capacity loads (G = 1, noninverting), under 250 μA per amplifier. These unity-gain stable amplifiers as an example of their excellent dynamic response over a wide have a typical gain bandwidth of 3.5 MHz. The JFET input stage range of conditions, delivering dc precision performance at low ensures bias current is typically a few picoamps and below quiescent currents. 125 pA maximum over the full temperature operating range.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION HIGH-SIDE SIGNAL CONDITIONING PHASE INVERSION ACTIVE FILTERS PROGRAMMABLE STATE VARIABLE FILTER OUTLINE DIMENSIONS ORDERING GUIDE