ISO122 - Precision Isolation Amplifier

The ISO122 is a precision isolation amplifier incorporating a novel duty cycle modulation-demodulation technique. The signal is transmitted digitally across a 2-pF differential capacitive barrier. With digital modulation the barrier characteristics do not affect signal integrity, thus resulting in excellent reliability and good high-frequency transient immunity across the barrier. Both barrier capacitors are imbedded in the plastic body of the package.

The ISO122 is easy to use. No external components are required for operation. The key specifications are 0.020% maximum nonlinearity, 50-kHz signal bandwidth, and 200-V/°C V_OS drift. A power supply range of 4.5 V to 18 V and quiescent currents of 5 mA on V_S1 and ±5.5 mA on V_S2 make the ISO122 ideal for a wide range of applications.

The ISO122 is available in 16-pin plastic DIP and 28-lead plastic surface-mount packages.

• 100% Tested for High-Voltage Breakdown
• Rated 1500 Vrms
• High IMR: 140 dB at 60 Hz
• Bipolar Operation: V_O = ±10 V
• 16-Pin Plastic DIP and 28-Lead SOIC
• Ease of Use: Fixed Unity Gain Configuration
• 0.020% Maximum Nonlinearity
• ±4.5-V to ±18-V Supply Range