ALFA RPAR AS3280 / AS3280A 'White Dot' Variant - CA3280 Replacement

ALFA RPAR AS3280 / AS3280A 'White Dot' Variant - CA3280 Replacement

The AS3280 and AS3280A types consist of two variable operational amplifiers that are designed to substantially reduce the initial input offset voltage and the offset voltage variation with respect to changes in programming current. This design results in reduced "AGC thump," an objectionable characteristic of many AGC systems. Careful design of critical places of the circuit reduces the amplifier dependence upon thermal and processing variables. The AS3280 has all the generic characteristics of an operational voltage amplifier except that the forward transfer characteristics is best described by transconductance rather than voltage gain, and the output is current, not voltage. The magnitude of the output current is equal to the product of transconductance and the input voltage. This type of operational transconductance amplifier has since gained wide acceptance as a gateable, gain controlled building block for instrumentation and audio applications, such as linearization of transducer outputs, standardization of widely changing signals for data processing, multiplexing, instrumentation amplifiers operating from the nanopower range to high current and high speed comparators.

The AS3280 /AS3280A is available in DIP16 thru-hole and SOIC16 SMT configurations

This IC is a perfect CA3280 replacement!

Datasheet: http://www.alfarzpp.lv/eng/sc/AS3280.pdf

Here is a wonderful Wikipedia page that lists original CEM and SSM chips in synthesizers to help with replacment decisions: https://en.wikipedia.org/wiki/CEM_and_SSM_chips_in_synthesizers