The AD5706KNZ is a dual, low power, bipolar op amp that has thelow input bias current of a JFET amplifier, but which offers asignificantly lower IB drift over temperature. It utilizes superbetabipolar input transistors to achieve picoampere input bias currentlevels (similar to FET input amplifiers at room temperature),while its IB typically only increases by 5 at 125°C (unlike aJFET amp, for which IB doubles every 10°C for a 1000increase at 125°C). The AD706KNZ also achieves the microvoltoffset voltage and low noise characteristics of a precision bipolarinput amplifier.
Since it has < 200 pA of bias current, the AD706KNZ does notrequire the commonly used “balancing” resistor. Furthermore,the current noise is only 50 fA/√Hz, which makes this amplifierusable with very high source impedances. At 600 A max supplycurrent (per amplifier), the AD706KNZ is well suited for today’shigh density boards.
The AD5706KNZ is an excellent choice for use in low frequencyactive filters in 12-bit and 14-bit data acquisition systems, inprecision instrumentation, and as a high quality integrator. TheAD706KNZ is internally compensated for unity gain and is availablein five performance grades. The AD706J is rated over thecommercial temperature range of 0°C to +70°C. The AD706A israted for the extended industrial temperature range of −40°Cto +85°C.
The AD706KNZ is offered in two varieties of an 8-lead package:PDIP and surface-mount (SOIC).
Product Highlights
The AD706KNZ is a dual low drift op amp that offers JFETlevel input bias currents, yet has the low IB drift of a bipolaramplifier. It may be used in circuits using dual op ampssuch as the LT1024.
The AD706KNZ provides both low drift and high dc precision.
The AD706KNZ can be used in applications where a chopperamplifier would normally be required but without thechopper’s inherent noise.
AD5706KNZ Feature
High DC Precision
100 µV Max Offset Voltage
1.5 µV/°C Max Offset Drift
200 pA Max Input Bias Current
0.5 µV p-p Voltage Noise, 0.1 Hz to 10 Hz
750 µA Supply Current
Available in 8-Lead PDlP and Surface-Mount (SOIC) Packages
Available in Tape and Reel in Accordance with EIA-481A Standard
Quad Version:
AD5706KNZ Applications
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
