Measurement Computing Personal Daq/3000 Series - Manual (Page 74)

7-8 Specifications 937492 Note : Specifications are subject to change without notice.
Analog Outputs Applicable to Personal Daq/3000 and /3001 only
Analog output channels are updated synchronously relative to scanned inputs, and clocked from either a
Personal Daq/3000 Series internal 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
:
Personal Daq/3000
: 2 DAC channels (DAC0, DAC1)
Personal Daq/3001
: 4 DAC channels (DAC0, DAC1, DAC2, DAC3)
Resolution
: 16 bits
Data Buffer
: PC-based memory
Output Voltage Range
: ±10V
Output Current
: ±1 mA; sourcing more current (1 to 10 mA) 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 maximum to rated accuracy
Clock Sources
: 4 programmable
1. Internal D/A clock, independent of scanning input clock
2. Internal 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
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 (1 to 10 mA) may require
a TR-2 power adapter option.
Sampling
: 4 MHz, maximum
Update Rate
: 4 MHz, maximum, 19 hours minimum (no minimum with external clock); resolution: 20.83 ns