7.3.2 Isolation Channel Signal Transmission

The AMC1350-Q1 uses an on-off keying (OOK) modulation scheme, as shown in Figure 7-1, to transmit the

Functional Block Diagram transmits an internally-generated, high-frequency carrier across the isolation barrier

to represent a digital one and does not send a signal to represent a digital zero. The nominal frequency of the

carrier used inside the AMC1350-Q1 is 480 MHz.

The receiver (RX) on the other side of the isolation barrier recovers and demodulates the signal and provides

the input to the fourth-order analog filter. The AMC1350-Q1 transmission channel is optimized to achieve the

highest level of common-mode transient immunity (CMTI) and lowest level of radiated emissions caused by the

high-frequency carrier and RX/TX buffer switching.

Modulator Bitstream

on High-side

Internal Clock

Signal Across Isolation Barrier

Recovered Sigal

on Low-side

Figure 7-1. OOK-Based Modulation Scheme

AMC1350-Q1

SBASAB0 – DECEMBER 2021

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