ISO124 (ACTIVE)

Precision Lowest Cost Isolation Amplifier

Recommended alternative parts

  • ISO122  -  0.02% Gain error nonlinearity compared to 0.01%.
  • ISO721  -  Digital isolation amplfier instead of analog.

Description

The ISO124 is a precision isolation amplifier incorporating a novel duty cycle modulation-demodulation technique. The signal is transmitted digitally across a 2pF differential capacitive barrier. With digital modulation, the barrier characteristics do not affect signal integrity, 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% max nonlinearity, 50kHz signal bandwidth, and 200µV/°C VOS drift. A power supply range of ±4.5V to ±18V and quiescent currents of ±5.0mA on VS1 and ±5.5mA on VS2 make these amplifiers ideal for a wide range of applications.

The ISO124 is available in DIP-16 and SO-28 plastic surface mount packages.

Features

  • 100% TESTED FOR HIGH-VOLTAGE BREAKDOWN
  • RATED 1500Vrms
  • HIGH IMR: 140dB at 60Hz
  • 0.010% max NONLINEARITY
  • BIPOLAR OPERATION: VO = ±10V
  • DIP-16 AND SO-28
  • EASE OF USE: Fixed Unity Gain Configuration
  • ±4.5V to ±18V SUPPLY RANGE
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL:
        Transducer Isolator, Isolator for Thermocouples, RTDs, Pressure Bridges, and Flow Meters, 4-20mA Loop Isolation
    • GROUND LOOP ELIMINATION
    • MOTOR AND SCR CONTROL
    • POWER MONITORING
    • PC-BASED DATA ACQUISITION
    • TEST EQUIPMENT

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Parametrics Compare all products in Isolation Amplifier

 
Isolation Mode Rejection 60Hz (Typ) (dB)
Isolation Voltage Cont Peak (DC) (V)
Isolation Voltage Pulse/Test Peak (V)
Small Signal Bandwidth (Typ) (kHz)
Leakage Current at 240V/60Hz (Max) (uArms)
Gain Non-Linearity (+/-) (Max) (%)
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
ISO124
140    
2121    
2400    
50    
0.5    
0.01    
-25 to 85    
8PDIP
8SOIC    
8.30 | 1ku    

Companion parts

Part # Name Product Family Comments
DCP010505B   Miniature, 1W Isolated Unregulated DC/DC Converters   ISOLATED MODULE - 1W & 2W MINIATURE MODULE    
DCH010505S   Miniature, 1W, 3kVDC Isolated DC/DC Converters   ISOLATED MODULE - 1W & 2W MINIATURE MODULE    
SN6501   Transformer Driver for Isolated Power Supplies   CONVERTER (INTEGRATED SWITCH) - ISOLATED DC/DC CONVERTER    Transformer driver for generating isolated secondary power supply  
INA105   Precision Unity Gain Differential Amplifier   AMPLIFIERS AND LINEAR - DIFFERENCE AMPLIFIER    INA105 can be used with the ISO124 in Battery Monitor System
See Literature sbos074c  
ISO150   Dual, Isolated, Bi-Directional Digital Coupler   ISOLATOR - Digital Isolator    ISO150 can be used with the ISO124 in Programmable-Gain Isolation Channel with Gains
See Literature sbos074c  Precision Lowest-Cost Isolation amplifier  
MPY634   Wide Bandwidth Precision Analog Multiplier   SPECIAL FUNCTION AMPLIFIER - MULTIPLIER    MPY634 can be used with the ISO124 in wide Bandwidth Precision Analog Multiplier
See Literature sbos074c  Precision Lowest-Cost Isolation amplifier  
OPA237   Single-Supply Operational Amplifiers MicroAmplifier(TM) Series   OPERATIONAL AMPLIFIER - PRECISION AMPLIFIER    OPA237 can be used with the ISO124 in Optional π Filter to Minimize Power-Supply Feedthrough Noise
See Literature sbos074c  Precision Lowest-Cost Isolation amplifier  
RCV420   Precision 4mA to 20mA Current Loop Receiver   SENSORS, SENSOR CONDITIONING, 4-20MA TRANSMITTER - 4-20MA CONDITIONING    RCV420 can be used with the ISO124 in Isolated 4-20mA Instrument Loop.
See Literature sbos074c  Precision Lowest-Cost Isolation amplifier  
REF102   Precision Voltage Reference   VOLTAGE REFERENCE - SERIES VOLTAGE REFERENCE    Battery Monitor for a 600V Battery Power System
See Literature sbos074c  Precision Lowest-Cost Isolation amplifier  
XTR105   4-20mA Current Transmitter with Sensor Excitation and Linearization   SENSORS, SENSOR CONDITIONING, 4-20MA TRANSMITTER - 4-20MA CONDITIONING    XTR105 can be used with the ISO124 in Isolated 4-20mA Instrument Loop.
See Literature sbos074c  Precision Lowest-Cost Isolation amplifier  
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