Texas Instruments ADS1241, Руководство пользователя, Страница: 5 / 10

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5 EVM Operation
MIDDLE
RIGHT LEFT
S 1
S 2
S 3
S 4
S 5
S 6
S 7
LEFT
(External)
RIGHT
(Onboard)
5.1 Analog Input
EVM Operation
The following section provides information on the analog input, digital control, and general
operating conditions of the ADS1241MEVM. Refer to
Figure 1 for switch and jumper locations,
and the meanings of left, middle, and right for switch settings in the following discussion.
Figure 1. ADS1241MEVM Switch and Jumper Locations
The analog input sources can be applied directly to J1 (top or bottom side) or through optional
amplifier and signal-conditioning modules. Consult the ADS1241 data sheet to determine the
maximum analog input range. Switches S1-S5 can be used to select the source for inputs
AIN0-3, as shown in
Table 5 . AINCOM is selected by S5, as shown in Table 6 .
Table 5. Input Selection Options - S1 through S4
Switch Position Input Selected
J1.2 for AIN0
J1.1 for AIN1
Left
J1.4 for AIN2
J1.3 for AIN3
Middle Ground for AIN0-3
Right 2.5V for AIN0-3
Table 6. AINCOM Selection Options - S5
Switch Position Input Selected
Left J1.10
Middle Ground
Right 2.5V
ADS1241MEVM SBAU106 – October 2004 5