200kΩ

1pF

1pF

1pF

1pF

150pF

Osc

200µA

100µA

Sense

200µA

100µA

200kΩ

150pF

S/H

G = 1

S/H

G = 6

Sense

A2

A1

+V

S2

Gnd 2

–V

S2

+V

S1

Gnd 1

–V

S1

V

IN

V

OUT

Isolation Barrier

9

ISO124

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SBOS074E – SEPTEMBER 1997 – REVISED JUNE 2018

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Copyright © 1997–2018, Texas Instruments Incorporated

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Isolation Amplifier

The ISO124 is a precision analog isolation amplifier. The input signal is transmitted digitally across a high-voltage

differential capacitive barrier. With digital modulation, the barrier characteristics do affect signal integrity, resulting

in excellent reliability and high-frequency transient immunity.

7.4 Device Functional Modes

The ISO124 device does not have any additional functional modes.