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AN502 SCM5B Ground Connections and Host System Interfaces

From Dataforth Corporation

Use of the ground jumper arrangement on the SCMPB01 and SCMPB02 backpanels depends on the particular host analog-to-digital converter (ADC) system connected to the backpanels and SCM5B modules. This application note details four common system interface schemes; more than these could exist. The SCMPB02 multiplexing backpanel is used as the example rather than the SCMPB01 because it has more logic circuitry which depends on proper interface schemes. However, most of the following notes are applicable to both.

This is a general purpose configuration which may be used with single-ended or differential ADC systems. For single-ended ADC systems, connect the ADC positive input to VOUT and ADC signal common and any shield line to SNS LO. Multiple SCMPB02 backpanels are connected together using SIG COM.

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