Specifications

Analog Programming
Pin Descriptions and Characteristics
Pin Descriptions
Pin Name Type Description
1 VPROG Analog in Programs output voltage. Only active when A-ENAB is low.
2 IPROG Analog in Programs output current. Only active when A-ENAB is low.
3 VREF Analog out
Reference voltage. Can be connected to VPROG or IPROG directly to
program full scale, or through potentiometers to adjust programmed
values.
4 DGND Ground Ground for digital inputs and outputs.
5 ANALOG-ENAB Digital in Analog Enable. Enables analog programming when low.
6 OT Digital out Over-temperature status indicator. High when OT is tripped.
7, 8 Not used
9 VMON Analog out Voltage monitor signal.
10 IMON Analog out Current monitor signal.
11 AGND Ground Ground for analog inputs and outputs.
12 Not used
13 INHIBIT Digital in Inhibits (turns off) output when low. Only active when A-ENAB is low.
14 OVP Digital out Over-voltage status indicator. High when OVP is tripped.
15 CV Digital out Constant voltage status indicator. High when in CV mode.
Pin Characteristics
Analog Input (pin 1, 2, 8)
Full scale voltage: 5 V or 10 V, depending on Menu:\System\IO\Analog setting.
Input resistance: 150 kΩ.
Analog Output (pin 3, 9, 10) Full scale voltage: 5 V or 10 V, depending on Menu:\System\IO\Analog setting.
Digital Inputs (pin 5, 13)
Drive with relay to ground or open-collector driver.
Open-circuit voltage: approximately 6.5 V.
Driver current sink requirement: < 0.4 V @ 3 mA
Digital Outputs (pin 6, 14, 15)
High state: 4.74 kΩ pull-up to approximately 10 V.
Low state sink capability: < 0.4 V @ 5 mA
Reference voltage Voltage: Fixed 5 V or 10 V, depending on Menu:\System\IO\Analog setting.
Agilent N8900 Series Operating and Service Guide 67