Measurement Computing ADAC/5500 Series - Manual (Page 55)

DAC Triggering: - Software Trigger
- External Trigger TTL
- Software Gate
- External Gate
Output Current: ±5 mA
Total Harmonic Distortion: Not specified, DACs for DC level only
6.3.4 Digital Inputs / Outputs – ADAC/5503HR and ADAC/5504HR
Number: 16 accessible from main I/O connector,
32 accessible from two auxiliary I/O connectors
6.3.4.1 Main I/O Connector – ADAC/5503HR and ADAC/5504HR
Number: 16 accessible from main I/O connector
I/O Direction Select: Software selectable in groups of eight
Register: Two 8 bit registers configurable as either inputs or outputs.
Inputs are unlatched read-only.
Data Coding: Positive logic
Input Level: 5.0V/3.3V CMOS/LSTTL compatible with 4.7 Kohm pull-
up resistor
High Level Input Voltage: 2 V min.
Low Level Input Voltage: 0.8 V max.
High Level Output Voltage: 2.4 V
Low Level Output Voltage: 0.4 V
Maximum Output Current: Low: 24 mA (sinking)
High: 24 mA (sourcing)
6.3.4.2 Auxiliary Digital I/O Connectors – ADAC/5503HR and ADAC/5504HR
Number: 32 accessible from 2 Auxiliary Digital I/O connectors
I/O Direction Select: Software selectable in groups of sixteen.
Register: Two 16 bit registers configurable as either inputs or
outputs. Inputs are unlatched read-only.
Data Coding: Positive logic
Input Level: 5.0V/3.3V CMOS/LSTTL compatible with 4.7 K ohm pull-
up resistor
High Level Input Voltage: 2 V min.
Low Level Input Voltage: 0.8 V max.
ADAC Series 908196
-50- ADAC/5500 Series User’s Manual