Isolation Amplifiers: FOD7840x Series & FODC79x Series

Product Summary

The FOD7840x series and FODC79x series are optically coupled, isolated amplifiers.

This device features a GaAlAs LED and a high-precision sigma-delta A/D converter on the input side, and a high-precision D/A converter with differential output on the output side.
Commonly used for monitoring current flowing through an external shunt resistor, it is a simple and low-cost solution for current and voltage detection.

This device is ideal for applications such as AC motor drive, servo motor drive, current and voltage detection in power inverters, and general-purpose analog signal isolation.

Main features/functions

FOD7840x series

・100 kHz (typ) bandwidth
・-0.3mV (typ) Input offset voltage
0.0005 V/V/℃ Gain drift (temperature dependence)
・ 0.02% of Non-Linearity (NL200 = maximum 0.35%)
・ DIP-8 package
・ Topr =-40 to +100 ℃

Products with different gain tolerances are available. FOD7840A (Gain tolerance) ±1%), FOD7840B (Gain tolerance) ±3%), FOD7840 (Gain tolerance) ±5%) are included in the lineup.

FODC79x series

• 200 kHz (typ) bandwidth
• Input offset voltage of 0.4mV (typ)
- Gain drift (temperature dependence) of 0.0012 V/V/°C
0.05% Non-Linearity
SO-8 package
Topr = -40 to +105℃

Products with different gain tolerances are available: FODC79B (gain tolerance ±0.5%), FODC79A (gain tolerance ±1%), and FODC790 (gain tolerance ±3%).

FOD7840x datasheet

FODC79x datasheet

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