Key facts
- Brand
- Analog Devices
- Model
- AD549
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-02
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Analog Devices AD549 Operational Amplifier Datasheet Rev H
The AD549 is a monolithic electrometer operational amplifier offering ultralow input bias current (as low as 60 fA) and low offset voltage. It uses Analog Devices' exclusive Topgate™ JFET technology and provides a 10^15 Ω common‑mode impedance, making it suitable for precision electrometer, photodiode, and pH‑probe applications.
The device is supplied in a TO‑99 hermetic metal can and is available in four performance grades (J, K, L, S) covering commercial and military temperature ranges. Detailed specifications, typical performance curves, and design guidelines are included to aid circuit designers in minimizing leakage currents and optimizing accuracy.
Analog Devices AD549 specifications
| Input bias current (AD549L) | 60 fA max |
|---|---|
| Input offset voltage (AD549K) | 0.25 mV max |
| Unity‑gain bandwidth | 1 MHz |
| Supply voltage rating | ±18 V |
Source: Analog Devices AD549 Operational Amplifier Datasheet Rev H
All Analog Devices AD549 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the input bias current of the AD549L?
The AD549L version has a maximum input bias current of 60 fA.
From: Analog Devices AD549 Operational Amplifier Datasheet Rev H
What is the maximum supply voltage for the AD549?
The device is rated for a supply voltage of up to ±18 V.
From: Analog Devices AD549 Operational Amplifier Datasheet Rev H
What is the maximum input bias current of the AD549?
The AD549L version has a maximum input bias current of 250 fA, while the AD549J version is limited to 250 fA as well.
Which package does the AD549 use?
The AD549 is available in a TO‑99 hermetic package.