AD743: Ultralow Noise BiFET Op Amp Data Sheet (Rev. E)11/2/1990290 kB
Features and Benefits
- Ultralow Noise Performance
2.9 nV/vHz at 10 kHz
0.38 µV p-p, 0.1 Hz to 10 Hz
6.9 fA/vHz Current Noise at 1 kHz
- Excellent DC Performance
0.5 mV Max Offset Voltage
250 pA Max Input Bias Current
1000 V/mV Min Open-Loop Gain
- AC Performance
2.8 V/µs Slew Rate
4.5 MHz Unity-Gain Bandwidth
THD = 0.0003% @ 1 kHz
Available in Tape and Reel in
Accordance with EIA-481A Standard
The AD743 is an ultralow noise precision, FET input, monolithic operational amplifier. It offers a combination of the ultralow voltage noise generally associated with bipolar input op amps and the very low input current of a FET-input device. Furthermore, the AD743 does not exhibit an output phase reversal when the negative common-mode voltage limit is exceeded.
The AD743's guaranteed, maximum input voltage noise of 4.0 nV/(root)Hz at 10 kHz is unsurpassed for a FET-input monolithic op amp, as is the maximum 1.0 µV p-p, 0.1 to 10 Hz noise. The AD743 also has excellent dc performance with 250 pA maximum input bias current and 0.5 mV maximum offset voltage.
The AD743 is specifically designed for use as a preamp in capacitive sensors, such as ceramic hydrophones. It is available in five performance grades. The AD743J and AD743K are rated over the commercial temperature range of 0°C to +70°C. The AD743A and AD743B are rated over the industrial temperature range of -40°C to +85°C. The AD743S is rated over the military temperature range of -55°C to +125°C and is available processed to MIL-STD-883B, Rev. C.
The AD743 is available in 8-pin plastic mini-DIP, 8-pin cerdip, 16-pin SOIC, or in chip form.
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Documentation & Resources
Low Noise Amplifier Selection Guide for Optimal Noise Performance7/24/2020
AN-253: Find Op Amp Noise with Spreadsheet2/14/201577 kB
AN-358: Noise and Operational Amplifier Circuits2/14/2015593 kB
FET-input Op Amp Has Lowest Combined V and I Noise3/1/1991 Analog Dialogue
Tools & Simulations
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|
|AD743JRZ-16||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|AD743JRZ-16-REEL7||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|Wafer Fabrication Data|
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