Features and Benefits
- High dc precision
150 μV maximum offset voltage
1.5 μV/°C maximum offset voltage drift
270 pA maximum input bias current
0.3 pA/°C typical IB drift
- Low noise: 0.5 μV p-p
- Typical noise: 0.1 Hz to 10 Hz
- Low power: 600 μA maximum supply current per amplifier
- Dual version: AD706
The AD704 is a quad, low power bipolar op amp that has the low input bias current of a BiFET amplifier and offers a significantly lower IB drift over temperature. It uses superbeta bipolar input transistors to achieve picoampere input bias current levels (similar to FET input amplifiers at room temperature), while its IB typically increases only by 5× at 125°C (unlike a BiFET amp, for which IB doubles every 10°C, resulting in a 1000× increase at 125°C). In addition, the AD704 achieves 150 μV offset voltage and the low noise characteristics of a precision bipolar input op amp.
Because it has only 1/20 the input bias current of an OP07, the AD704 does not require the commonly used balancing resistor. Furthermore, the current noise is 1/5 that of the OP07, which makes the AD704 usable with much higher source impedances. At 1/6 the supply current (per amplifier) of the OP07, the AD704 is better suited for today’s higher density circuit boards and battery-powered applications.
The AD704 is an excellent choice for use in low frequency active filters in 12- and 14-bit data acquisition systems, in precision instrumentation, and as a high quality integrator. The AD704 is internally compensated for unity gain stability. The AD704J is rated over the commercial temperature range of 0°C to 70°C. The AD704A is rated over the industrial temperature of −40°C to +85°C. The AD704S is rated over the military temperature range of −55°C to +125°C, processed to MIL-STD-883B.
- Industrial/process controls
- Weigh scales
- ECG/EKG instrumentation
- Low frequency active filters
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Tools & Simulations
AD704 SPICE Macro Models
Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|AD704ARZ-16||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD704ARZ-16-REEL||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD704JNZ||Material Declaration||Reliability Data||14-Lead PDIP|
|AD704JRZ-16||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD704JRZ-16-REEL||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD704SE/883B||Material Declaration||Reliability Data||20-Lead LCC|
|Wafer Fabrication Data|
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