AN614

Rev. 0.2

3

Figure 3. Six-Channel Linear Isolator Block Diagram

In addition, a single Si86xx isolator can host multiple linear isolators by adding additional modulator/filter circuits to

a multi-channel Si86xx digital isolator, as shown in Figure 3. In this example, an Si8663 six-channel digital isolator

provides three forward and three reverse linear isolator channels, amortizing the isolator across all six channels.

Figure 4. ISOlinear Reference Design Evaluation Board

Figure 4 shows the board included in the ISOlinear reference design kit. This board contains reference design

configurations for 9-bit, 10-bit, and 12-bit linear isolator performance, enabling the user to optimize isolator cost/

performance trade-offs. (For detailed circuit ISOlinear reference design schematics, see the “ISOlinear Reference

Design Users Guide” available for download at www.silabs.com/isolation.)

Si8663

Filter

Modulator

Filter

Modulator

Filter

Modulator

Modulator

Filter

Modulator

Filter

Modulator

Filter

Isolator Channel

Isolator Channel

Isolator Channel

Isolator Channel

Isolator Channel

Isolator Channel

Amp

Amp

Amp

Amp

Amp

Amp

Amp

Amp

Amp

Amp

Amp

Amp

 

12‐Bit Version

(Circuit #1)

10‐Bit Version

(Circuit #2)

9‐Bit Version

(Circuit #3)