757P

The 757P is a complete temperature compensated DC-coupled Log Ratio Amplifier. It is comprised of two input channels for processing signals spanning up to 6 decades in dynamic range (1nA to 1mA). By virtue of its symmetrical FET input stages, the amplifier can accommodate this 6 decade signal range at either channel. Log conformity is maintained to within 1/2% over 4 decades of input and to within 1% over the full input range. Unlike other log ratio designs, amplifier does not restrict the relative magnitude of the two signal inputs to achieve rated performance. Either input can be operated within the specified range regardless of the signal level at the other channel. The log-ratio amplifier design makes available both input amplifier summing junctions. As a result, it can directly interface with photo diodes operating in the short-circuit cur-rent mode without the need of additional input circuitry.

• Symmetrical FET inputs
• Voltage or current operation
• Temperature compensated

Applications

Test & Measurement, Industrial