Copyright © 2017, Texas Instruments Incorporated
Introduction
2
SLAU745 – November 2017
Copyright © 2017, Texas Instruments Incorporated
AMC1311EVM Users Guide
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1
Introduction
For use in high-resolution voltage measurement applications, the high-impedance input of the AMC1311 is
optimized for connection to high-voltage resistive dividers or other voltage signal sources with high output
resistance.
Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with
the AMC1311EVM.
1.1
Features
•
Full-featured Evaluation Module for the AMC1311 single-channel precision isolation amplifier.
•
Screw terminals for easy access to analog inputs and outputs.
•
Transformer and rectifiers to provide an isolated 5-V source to VDD1.
•
Differential to Single-ended output option.
2
Analog Interface
The analog input to the AMC1311 is routed from a three-wire screw terminal screw at J1.1 which provides
access to the VINP terminal. A test point, TP1 is also provided along with pads for 1206 size user installed
series resistors R1, R2 and R3 to create a voltage divider circuit for the input to the AMC1311. The analog
input is referenced to J1.2 or TP2.
2.1
Analog Input
The default analog input to the AMC1311EVM board is comprised of R4 and C3 which form a simple anti-
aliasing filter with a corner frequency of 723 Hz. The input circuit for the AMC1311 is shown in
.
Using a signal generator or other voltage source, the user can apply an input signal directly to J1 pin 1.
The maximum voltage input to the AMC1311 via J1.1 is 2 V referenced to J1.2 or TP2.
Figure 1. AMC1311EVM Schematic – Analog Input Section
