Measurement Computing DaqBoard 3000USB Series - Manual (Page 101)

Note: Specifications are subject to change without notice. 928391 Specifications 7-7
Analog Outputs /3001USB and /3031USB models only
Analog output channels are updated synchronously relative to scanned inputs, and clocked from either an
internal onboard clock, or an external clock source. Analog outputs can also be updated asynchronously,
independent of any other scanning in the system. Streaming from disk or memory is supported, allowing
continuous waveform outputs (limited only by available PC system resources).
Channels:
4 DAC channels (DAC0, DAC1, DAC2, DAC3)
Resolution: 16 bits
Data Buffer: PC based memory
Output Voltage Range:
±10V
Output Current:
±1 mA max; sourcing more current may require a TR-2 power adapter option.
Offset Error:
±0.0045V maximum
Digital Feedthrough: <10 mV when updated
DAC Analog Glitch: <12 mV typical at major carry
Gain Error:
±0.01%
Update Rate: 1 MHz maximum, 19 hours minimum (no minimum with external clock); resolution: 20.83 ns.
Settling Time: 2
µs to rated accuracy
Clock Sources: 4 programmable
1. Onboard D/A clock, independent of scanning input clock
2. Onboard scanning input clock
3. External D/A input clock, independent of external scanning input clock
4. External scanning input clock
Digital I/O
One Digital I/O Channel, Typical
Channels: 24
Ports: 3 x 8-bit. Each port is programmable as input or output.
Input Scanning Modes: 2 programmable
1. Asynchronous, under program control at any time relative to input scanning
2. Synchronous with input scanning
Input Characteristics: 220
Ω series resistor, 20 pF to common
Logic Keeper Circuit: Holds the logic value to 0 or 1 when there is no external driver.
Input Protection:
±15 kV ESD clamp diodes parallel
Input Levels:
Low: 0 to 0.8V
High: +2.0V to +5.0V
Output Levels:
Low: < 0.8V
High: >2.0V
Output Characteristics: Output 1.0 mA per pin; ; sourcing more current may require
a TR-2 power adapter option.
Sampling Rate: 4 MHz maximum
Update Rate: 4 MHz maximum; 19 hours minimum (no minimum with external clock); resolution: 20.83 ns.