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ADVANCED COMMUNICATIONS & SENSING
USER GUIDE
SX8724SEVK
Evaluation Kit for SX8724S Data Acquisition System
ACS - Revision 1.0 May 2011
© Semtech Corp.
17.2.3 Sensor Connection to the
SX8724S
The schematic below shows how the sensor is connected to the SX8724S using the pins AC2–AC3 as
differential input. The default VMUX setting will select V
BATT
–V
SS
as reference inputs for the acquisition chain.
The sensor will be biased with V
BATT
when D0 is set as digital output high state. It will be switched on/off by
the register setting.
Figure 30. Sensor schematic connection to the SX8724S
PGA1
PGA2
PGA3
ADC
±
Vin
±
Vin
±
Vin
±
Vin
±
Voff
±
Voff
±
Vref
AMUX
Analog Inputs
VMUX
Reference Inputs
V
IN
V
D1
V
D2
V
IN,ADC
V
REF,ADC
VSS
VREF
VSS
VBATT
VSS
VREF
ANALOG ZOOM
S
GND
BIAS
VOUT+
VOUT-
Vs
D0
AC3
AC2
VBATT
VSS
