Datasheet for the AD640 monolithic logarithmic amplifier, featuring 50 dB dynamic range from DC to 120 MHz with absolute calibration.
The AD640 is a complete monolithic logarithmic amplifier designed for precision instrumentation applications such as radar and sonar. It provides up to 50 dB of dynamic range for frequencies from DC to 120 MHz using a successive detection scheme. The device features five cascaded DC-coupled amplifier/limiter stages, each with a 10 dB gain and 350 MHz bandwidth, resulting in a fully differential signal path.
| Dynamic Range | up to 50 dB |
|---|---|
| Frequency Range | DC to 120 MHz |
| Small Signal Gain | 10 dB per stage |
| Bandwidth per Stage | 350 MHz |
| Supply Voltage Range | –4.5 V to –7.5 V |
| Quiescent Current | Typically 220 mW at 65 V |
| Temperature Range (Military) | –55°C to +125°C |
The AD640 provides up to 50 dB of dynamic range for frequencies from DC to 120 MHz.
The device operates with supply voltages ranging from –4.5 V to –7.5 V.
Yes, it is laser calibrated to close tolerances and maintains high accuracy over the full military temperature range.