Switches S1 And S2; Ain0-1 Input Select Switch (S1) - Texas Instruments ADS1256EVM-PDK User Manual

EVM Operation
7 EVM Operation
This section provides information on the analog input, digital control, and general operating conditions of
the ADS1256EVM.
7.1 Analog Input
The analog input sources can be applied directly to J1 (top or bottom side). Additionally, switches S1 and
S2 must be set to route the input signals from J1. Otherwise, the inputs are used to measure the
reference or inputs shorted to the reference. Switches S1 and S2 are shown in
7.1.1 S1: AIN0-1 Input Select
These switches control which lines are routed to the ADS1256 AIN0-AIN1 inputs.
positions of these switches.
Board Marking
EXT
REF
ZERO
12
ADS1256EVM and ADS1256EVM-PDK
Figure 6. Switches S1 and S2
Table 8. AIN0-1 Input Select Switch (S1)
Switch Position Input Source
Left External
Middle Reference voltage
Right Zero (shorted to
reference)
Copyright © 2003–2018, Texas Instruments Incorporated
Figure
Table 8
AIN0 Connection AIN1 Connection
J1.2 J1.1
+2.5V AGND
+2.5V +2.5V
SBAU090E – November 2003 – Revised November 2018
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6.
shows the