ISO124 High-Precision Isolation Amplifier |


High-Precision Isolation Amplifier

High-Precision Isolation Amplifier - ISO124

Recommended alternative parts

  • ISO122  -  0.02% Gain error nonlinearity compared to 0.01%.


The ISO124 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 ISO124 is easy to use. No external components are required for operation. The key specifications are 0.010% maximum nonlinearity, 50-kHz signal bandwidth, and 200-µV/°C VOS drift. A power supply range of ±4.5 V to ±18 V, and quiescent currents of ±5 mA on VS1 and ±5.5 mA on VS2 make the ISO124 device a good choice for a wide range of applications.

The ISO124 is available in 16-pin PDIP and 28-lead SOIC plastic surface-mount packages.



  • 100% Tested for High-Voltage Breakdown
  • Rated 1500 Vrms
  • High IMR: 140 dB at 60 Hz
  • Maximum Nonlinearity: 0.010%
  • Bipolar Operation: VO = ±10 V
  • Packages: PDIP-16 and SOIC-28
  • Ease of Use: Fixed Unity Gain Configuration
  • Supply Range: ±4.5-V to ±18-V

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Parametrics Compare all products in Isolated Amplifiers

Common Mode Rejection Ratio (Typ) (dB)
Isolation Working Voltage VIOWM (rms) (V)
Small Signal Bandwidth (Typ) (kHz)
Leakage Current at 240V/60Hz (Max) (uArms)
Gain Non-Linearity (+/-) (Max) (%)
Operating Temperature Range (C)
ISO124 ISO122
140     140    
1500     1500    
50     50    
0.5     0.5    
0.01     0.02    
Catalog     Catalog    
-25 to 85     -25 to 85    

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