ams AG AS3932 Toepassingsnotitie - Pagina 4

Blader online of download pdf Toepassingsnotitie voor {categorie_naam} ams AG AS3932. ams AG AS3932 8 pagina's. 3d low frequency wakeup receiver

Pagina afdrukken
Application Note AS3932 - Migration from ATA5283 (1-channel) to AS3932
1

Introduction

This document shows how to easily migrate from ATA5283 to AS3932.
2

Comparison of the Hardware

2.1

Application diagrams

The figures 2-1 and 2-2 show the application diagram of ATA5283 and AS3932, respectively.
Figure 2-1: Application diagram of ATA5283
Figure 2-2: Application diagram of AS3932
ATA5283 is a single channel wakeup receiver, while AS3932 has three channels available. Therefore it is
mandatory to connect the channels 2 and 3 (LF2P and LF3P) of AS3932 to a fixed DC potential (either GND or
VCC) and to disable them in the register map via SDI (see chapter 3). The ATA5283 application block diagram
shows that the input antenna has to be referenced to the positive supply, while the AS3932 block diagram shows
that the inputs are referenced to ground. In addition AS3932 offers the possibility to reference the input to the
positive potential,, as shown in the next figure 2-3. This modification will not influence the performance of AS3932.
Version 1.0, Date: 20/02/2009
Page 3 of 7