The ISO120 and ISO121 are precision isolation amplifiers

incorporating a novel duty cycle modulationdemodulation

technique. The signal is transmitted

digitally across a 2pF differential capacitive barrier.

With digital modulation the barrier characteristics do

not affect signal integrity, which results in excellent

reliability and good high frequency transient immunity

across the barrier. Both the amplifier and barrier

capacitors are housed in a hermetic DIP. The ISO120

and ISO121 differ