Key facts
- Brand
- Analog Devices
- Model
- AD743
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-12
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Analog Devices AD743 Ultralow Noise BiFET Op Amp Handbook
The AD743 is an ultralow‑noise, precision, FET‑input monolithic operational amplifier. It combines the very low voltage‑noise performance of bipolar op‑amps (2.9 nV/√Hz at 10 kHz) with the low input‑bias current of a JFET device (250 pA max). The device offers a 0.5 mV maximum offset voltage, 4.5 MHz unity‑gain bandwidth, 2.8 V/µs slew rate, and operates from ±15 V supplies with a quiescent current of about 8‑10 mA.
Typical applications include high‑dynamic‑range preamplifiers for capacitive sensors such as hydrophones and accelerometers, charge‑sensitive amplifiers, and low‑noise filter stages. The AD743 is offered in 8‑lead PDIP and 16‑lead SOIC packages and is rated for operation from –65 °C to +125 °C (storage) and 0 °C to 70 °C (junction).
Analog Devices AD743 specifications
| Input Offset Voltage (max) | 0.5 mV |
|---|---|
| Input Bias Current (typ) | 250 pA |
| Input Voltage Noise (typ, 10 kHz) | 2.9 nV/√Hz |
| Maximum Input Voltage Noise (10 kHz) | 4.0 nV/√Hz |
| Unity‑Gain Bandwidth | 4.5 MHz |
| Power Supply Range | ±15 V |
| Quiescent Current | 8.1–10.0 mA |
Source: Analog Devices AD743 Ultralow Noise BiFET Op Amp Handbook
All Analog Devices AD743 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum input voltage noise of the AD743?
The AD743’s maximum input voltage noise is 4.0 nV/√Hz at 10 kHz.
From: Analog Devices AD743 Ultralow Noise BiFET Op Amp Handbook
Does the AD743 exhibit output phase reversal when the negative common‑mode voltage limit is exceeded?
No, the AD743 does not exhibit an output phase reversal under those conditions.
From: Analog Devices AD743 Ultralow Noise BiFET Op Amp Handbook
What is the input offset voltage of the AD743?
The initial input offset voltage is specified as 0.25 mV minimum and 1.0 mV typical.
What is the typical input voltage noise at 10 kHz?
The AD743 exhibits a typical input voltage noise of 4.0 nV/√Hz at 10 kHz.