Powering The Ad5245: Two Options For Powering; Configuring Other Components - Analog Devices AD5245 User Manual

Evaluation Board User Manual
JP7
JP6
CP1
CP2 -IN1
JP11
2 U3A
JP10
Vin1 +IN1 3
CP5
JP8
JP9
Figure 4. Detailed Opamp Connections

Powering the AD5245: Two Options for Powering

I. Using the power from the parallel port as VDD
Simply connect JP1.
The voltage level will be whatever your parallel port operates at.
II. Using a separate supply
DO NOT connect JP1.
Connect voltage supply power and ground to the VDD and GND pads on the board.

Configuring other Components

Two Channel Opamp - AD822
Positive Supply
To use the same VDD as the AD5245, connect JP6.
To use a separate positive supply, connect JP7 and apply positive supply(no more than +15V) to the VCC
pad.
Negative Supply
To use GND, simply connect JP8.
To use a negative supply, connect JP9 and apply negative supply to VEE pad.
For more details on connecters and jumpers around the opamp, refer to Figure 4.
Rev B 11/03/03
VCC
VDD
V+
C18
C19
0.1u 10u
CP3
CP4
JP13
Vin2
1 OUT1
CP6 CP7
C21
C20
Opamp configuration
10u
0.1u
VEE
256-Position I
Digital Potentiometer
CP8 CP10
CP9 -IN2 CP11
6
JP12
7
+IN2 5
U3B
CP13 CP14
CP12
4
2
C Compatible
AD5245
OUT2