Channel-to-channel isolated I 2C ADC and amplifier. Some applications require channel-to-channel isolation, where each channel is isolated from every other channel, as shown in Figure 4. (a) Isolated I 2C ADC and amplifier, and (b) Isolated I 2C DAC and amplifier. These applications also require an isolated power supply to power the converters and amplifiers on the secondary side. Figure 3 shows two isolated data-acquisition systems. It is often necessary to bring data from a precision converter (ADC or DAC) across an isolation barrier via an I 2C bus.
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