AD706 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD706
Manufacturer

ADI
ChipWorker Part#

CW127274136
RoHS

Lead free / RoHS Compliant
Description

Dual Picoampere Input Current Bipolar Op Amp
Documentation

Datasheet

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AD706 Specifications

Attribute	Attribute Value

Part Number	AD706
Manufacturer	ADI
ChipWorker Part#	CW127274136
Documentation	Datasheet
Case/Package	SOIC
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Product Lifecycle Status	Unknown
RoHS	RoHS Compliant

Product Description

Product Details
The AD706 is a dual, low power, bipolar op amp that has the low input bias current of a JFET amplifier, but which offers a significantly lower IB drift over temperature. It utilizes superbeta bipolar input transistors to achieve picoampere input bias current levels (similar to FET input amplifiers at room temperature), while its IB typically only increases by 5× at 125°C (unlike a JFET amp, for which IB doubles every 10°C for a 1000× increase at 125°C). The AD706 also achieves the microvolt offset voltage and low noise characteristics of a precision bipolar input amplifier.
Since it has < 200 pA of bias current, the AD706 does not require the commonly used “balancing” resistor. Furthermore, the current noise is only 50 fA/√Hz, which makes this amplifier usable with very high source impedances. At 600 µA max supply current (per amplifier), the AD706 is well suited for today’s high density boards.
The AD706 is an excellent choice for use in low frequency active filters in 12-bit and 14-bit data acquisition systems, in precision instrumentation, and as a high quality integrator. The AD706 is internally compensated for unity gain and is available in five performance grades. The AD706J is rated over the commercial temperature range of 0°C to +70°C. The AD706A is rated for the extended industrial temperature range of –40°C to +85°C.
The AD706 is offered in two varieties of an 8-lead package: plastic mini-DIP and surface-mount (SOIC).
**Product Highlights**
1. The AD706 is a dual low drift op amp that offers JFET
level input bias currents, yet has the low IB drift of a bipolar
amplifier. It may be used in circuits using dual op amps
such as the LT1024.
2. The AD706 provides both low drift and high dc precision.
3. The AD706 can be used in applications where a chopper
amplifier would normally be required but without the
chopper’s inherent noise.
**Applications**
Low Frequency Active Filters
Precision Instrumentation
Precision Integrators
### Features and Benefits
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 Plastic Mini-DlP and Surface-Mount (SOIC) Packages
Available in Tape and Reel in Accordance with EIA-481A Standard
Quad Version: AD704

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