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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.
7
User Interfaces
The analog interface gives access to the ZoomingADC inputs. The digital interface gives access to the GPIO
pins, the PC gateway connections and the power supplies. The analog and digital connections are available
on single row 2.54mm connectors and on the bare PCB next to the prototyping area.
The connections points are available for industrial PCB terminal blocks and on the bare PCB next to the
SX8724S
Figure 4. Analog Interface Schematic
Figure 5. SX8724S Interface on the Board
MOSI
SCLK
SS
READY
1
2
3
4
5
6
J1
AGND
0.1uF
C13
AGND
VBATT
1
2
3
4
J2
VPUMP
MISO/READY
Analog
Digital
SS
Acquis ition
22nF
C14
INTERFACES
MISO/READY
AC2
AC3
AC4
AC5
AC6
AC7
D0
D1
AC3
1
AC4
4
AC5
5
AC6
2
AC7
3
VBATT
6
VSS
7
READY
8
D1
9
SS
10
MISO/READY
11
D0
12
MOSI
13
SCKL
14
VPUMP
15
AC2
16
VSS
17
U1
SX8724S
4
Analog interface
Digital interface
+ Vref,in and Vref,out
Connect SX8724S
VBATT pin to supply
(or measure current)
Connect SX8724S READY
signal to gateway
Connect SPI interface to SX8724S
(pull-ups are on gateway side)
