Specifications

485SDA103798 Manual 7
B&B Electronics -- 707 Dayton Rd. -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
A/D Ref Input -
The voltage connected to this pin determines the low end of the
input voltage range. For proper operation, this pin must be
connected to a DC voltage between 0 and +2.5 Volts. Typically, this
is connected to your device’s ground and analog ground (0V).
Analog Ground
This pin should be connected to your analog device’s ground. If
ground (0V) is the low end of your input voltage range,
A/D Ref Input- should be connected to this pin. To minimize noise,
do not connect analog ground and digital ground together. Connect
unused A/D inputs to analog ground.
Typical Connections
Figure 2.1 shows the typical connections of the 485SDA10 for a
0 to 5V DC input range.
Figure 2.1 - Typical 0-5V A/D Connection