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ISO124P

TIISO124P

Texas Instruments
Isolation Amplifier 1 Circuit 8-PDIP
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Overview

The ISO124P is a precision isolation amplifier that utilizes a duty cycle modulation-demodulation technique to provide high-voltage galvanic isolation for analog signals. It offers 1500 Vrms isolation and 140 dB common-mode rejection at 60 Hz, ensuring signal integrity in environments with high common-mode voltages or ground loops. The device is designed for ease of use with a fixed unity gain configuration and requires no external components for basic operation.

Why Choose This Part

It features a maximum nonlinearity of 0.010% and a wide bipolar input range of -10V to +10V, making it suitable for high-accuracy instrumentation. The 50 kHz bandwidth and 2V/us slew rate support relatively fast signal tracking compared to many basic isolation amplifiers.

Applications

Industrial Process Control
Isolating sensor signals such as thermocouples or RTDs from high-voltage motor drives and PLC inputs to prevent ground loops.
High-Voltage Power Monitoring
Safe measurement of bus voltages in electric vehicle power electronics and battery management systems.
Medical Instrumentation
Providing patient-safe galvanic isolation for data acquisition systems and monitoring equipment.
Data Acquisition Systems
Protecting sensitive ADCs and microcontrollers from transients and high-voltage spikes in harsh industrial environments.

Key Specifications

Slew Rate 2V/us
Mounting Type Through Hole
-3db Bandwidth 50 kHz
Amplifier Type Isolation
Package / Case 16-DIP (0.300", 7.62mm), 8 Leads
Current - Supply 5mA
Number of Circuits 1
Operating Temperature -25degC ~ 85degC
Voltage - Input Offset 20 mV
Supplier Device Package 8-PDIP
Current - Output / Channel 15 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 9 V

Getting Started

To use the ISO124P, provide separate, isolated power supplies for both the high-side and low-side circuits (typically +/-15V). Connect the analog signal to the input pins and retrieve the isolated output from the low-side pins; no external gain-setting resistors are required due to the fixed unity gain architecture.