Datasheet

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7.1 Factory Default Setting
EVM Operation
The EVM board is set to its default configuration from the factory as described in Table 2 to operate in
bipolar ± 2.5-V output operation. The default jumper settings are also shown in Table 2 .
Table 2. DAC7631EVM Factory Default Jumper Setting
DAC7631EVM JUMPER DEFAULT CONFIGURATION
Reference Jumper Positiion Function
W1 2-3 LDAC is driven by the GPIO0 input from J2-2
W2 1-2 DAC output (V
OUT
) is routed to J4-2
W3 1-2 CS signal is driven from J2-1
W4 1-2 LOAD is driven by GPIO1 from J2-6
W5 1-2 Negative supply rail of U2 operational-amplifier is supplied with V
SS
W6 OPEN 4-mA to 20-mA operation
W7 2-3 External voltage reference source is supplied by REF1
W8 CLOSE V
OUT
sense pin is tied to V
OUT
pin
W9 OPEN 4-mA to 20-mA operation
W10 1-2 External reference to V
REF
H
W11 1-2 External reference to V
REF
L via U5 for inversion
W14 OPEN Reset pin high
W15 OPEN U2 operational amplifier configuration jumper set to unity gain
W16 OPEN RSTSEL configuration jumper
W20 2-3 Dual supply operation (V
SS
= –5VA)
J5 2-3 DAC output (V
OUT
) is routed to the noninverting input of U2
Figure 9. DAC7631EVM Default Jumper Setting
DAC7631EVM 10 SLAU148 – January 2005