IL261BETR13 datasheet(7/10 Pages) ETC

Part #	IL261BETR13

Description	High Speed Five Channel Digital Couplers

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IL260 IL261

7

Application Diagrams

Figure 1 Single Channel

∆Σ

Figure 1 shows a typical single channel

∆Σ ADC

application. The A/D is located on the bridge with no

signal conditioning electronics between the bridge

sensor and the ADC. In this application, the IL717 is

the best choice for isolation. It isolates the control bus

from the microcontroller. The system clock is located

on the isolated side of the system.

Figure 2 Multi Channel

∆Σ

The second

∆Σ application is where multiple ADC's

are configured in a channel-to-channel isolation

configuration. The problem for designers is how to

control clock jitter and edge placement accuracy of

the system clock for each ADC. The best solution is

to use a single clock on the system side and distribute

this to each ADC. The IL261 adds a 5th channel to

the IL717. This 5th channel is used to distribute a

single, isolated clock to multiple ADC's as shown in

Figure 2.

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