Key facts
- Brand
- Analog Devices
- Model
- AD641
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-03
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ANALOG DEVICES AD641: 250 MHz Demodulating Logarithmic Amplifier Data Sheet (Rev C 1999-08-01-)
The AD641 is a complete logarithmic solution designed for compressing and measuring wide dynamic range signals in IF/RF systems. It utilizes a successive detection architecture to provide an output current that is logarithmically proportional to its input voltage, with log conformance of 2.0 dB over the input range -44 dBm to 0 dBm.
The device features onboard resistors and a 10x attenuator for flexibility in slope selection. It operates from a +5 V supply with low quiescent current and is available in industrial (-40°C to +85°C) and military (-55°C to +125°C) temperature ranges.
Analog Devices AD641 specifications
| 3 dB Bandwidth | 250 MHz |
|---|---|
| Dynamic Range (Single) | 44 dB |
| Log Conformance Accuracy | +2.0 dB |
| Supply Voltage Range | +4.5 V to +7.5 V |
| Quiescent Current (+Vs) | 9 mA (Typical) |
Source: ANALOG DEVICES AD641: 250 MHz Demodulating Logarithmic Amplifier Data Sheet (Rev C 1999-08-01-)
All Analog Devices AD641 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the usable frequency range of the AD641?
The amplifier maintains logarithmic performance up to 250 MHz.
From: ANALOG DEVICES AD641: 250 MHz Demodulating Logarithmic Amplifier Data Sheet (Rev C 1999-08-01-)
Does the AD641 include onboard resistors?
Yes, it features onboard resistors and a 10x attenuator for slope selection.
From: ANALOG DEVICES AD641: 250 MHz Demodulating Logarithmic Amplifier Data Sheet (Rev C 1999-08-01-)
What temperature range does the industrial version support?
The industrial version operates from –40 °C to +85 °C.