AS3280D AS3280 CA3280 3280 ota lm13700 v13700 as13704
ALFA RPAR AS3280-SMT Dual OTA (SOIC-16)
ALFA RPAR AS3280-SMT Dual OTA0.0071AS3280-SMTSOIC-16$8.29 Quantity: $7.88 when ordering 2 or more $7.09 when ordering 10 or more
3% discount for orders over USD 1000 paid by direct transfer, contact us for details
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The AS3280 is a direct replacement for the (discontinued) CA3280 used in many classic audio products. Note that this
device is in SMT packaging (SOIC-16) and requires a SOIC-DIL adapter kit to be used in through-hole (DIL) applications.
The AS3280 consists 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 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.
Features
Low Initial Input Offset Voltage: 1.8mV (Max)
Low Offset Voltage Change vs IABC: <500 µV (Typ)
Low Offset Voltage Drift: 5µV/°C (Typ)
Excellent matching of the two amplifiers in the package for all characteristics
Internal current-driven linearizing diodes reduce the external input current to an offset component
