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AD743:  Ultralow Noise BiFET Op Amp

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 ...More

AD743:  Ultralow Noise BiFET Op Amp

Product Description

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.

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  • 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
  • Iq per Amplifier: 10mA
  • # OpAmps per Pkg: 1
  • Operating Temp Range: 0 to +70
  • Packages: DIP,SOIC
  • -3dB Bandwidth: 4.5MHz
  • Slew Rate: 2.8V/µs
  • Vos: 250µV
  • Ib: 150pA
  • Input Noise (nV/rtHz): 2.9nV/rtHz
  • Vcc-Vee Supply (V): 9.6 to 36

Pin Configuration Diagram for AD743

AD743 Diagram
Pin Configuration Diagram for AD743

Similar Products

arrow View Full Interactive Product Selection Table
Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
AD745 20MHz 12.5V/µs 250µV 150pA 2.9nV/rtHz 1 0 to +70
AD743 4.5MHz 2.8V/µs 250µV 150pA 2.9nV/rtHz 1 0 to +70
AD8671 10MHz 4V/µs 20µV 3nA 2.8nV/rtHz 1 -40 to +125
AD8605 10MHz 5V/µs 20µV 200fA 6.5nV/rtHz 1 -40 to +125
AD8510 8MHz 20V/µs 80µV 21pA 7.6nV/rtHz 1 -40 to +85
AD8661 4MHz 3.5V/µs 30µV 300fA 12nV/rtHz 1 -40 to +125
ADA4000-1 5MHz 20V/µs 200µV 5pA 16nV/rtHz 1 -40 to +125
AD8627 5MHz 5V/µs 50µV 250fA 16nV/rtHz 1 -40 to +85
AD8641 3.5MHz 3V/µs 50µV 250fA 27.5nV/rtHz 1 -40 to +125
AD797 8MHz 20V/µs 25µV 250nA 900pV/rtHz 1 -40 to +85
AD820 1.9MHz 3V/µs 100µV 2pA 13nV/rtHz 1 -40 to +85
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Model
The model number is a specific version of a generic that can be purchased or sampled.

Status
Status indicates the current lifecycle of the product. This can be one of 4 stages:
  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Production Availability
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.