IL715/IL716/IL717

9

NVE Corporation

11409 Valley View Road, Eden Prairie, MN 55344-3617

Phone: (952) 829-9217

Fax: (952) 829-9189

www.IsoLoop.com

©NVE Corporation

Application Diagrams

Isolated Logic Level Shifters

CS

CLK

DI

DO

Sensor

ADC

IL717

Controller

+5V

+3.3V

GND 1

GND 2

Single-Channel Isolated Delta-Sigma A/D Converter

Bridge +

Serial Data Out

Serial Data In

Data Clock

Chip Select

Iso SD Out

Iso SD In

Iso Data Clock

Iso CS

Bridge -

OSC 2

IL717

CS5532

Clock

Generator

Bridge

Bias

Delta Sigma A/D

Isolation

Boundary

This circuit illustrates a typical single-channel delta-sigma ADC. The A/D is located on the bridge with no signal conditioning electronics

between the bridge sensor and the ADC. In this case, 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.