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7-4 Specifications
09-04-02
DaqTemp User’s Manual
For DaqTemp7A and DaqTemp14A, analog output channels can be 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. Bus Mastering DMA provides CPU and system-
independent data transfers, ensuring accurate outputs that are irrespective of other system activities. Streaming from disk or
memory is supported, allowing continuous, nearly infinite length, waveform outputs (limited only by available PC system
resources).
Analog Output Channels:
2 for DaqTemp7A, designated as DAC0 and DAC1
4 for DaqTemp14A, designated as DAC0, DAC1, DAC2, and DAC3
Resolution: 16 bits
Output Voltage Range: ±10V
Output Current: ±10 mA
Offset Error: ±0.0045V max
Gain Error: ±0.01%
Update Rate: 100 kHz max, 1.5 Hz min (no minimum with external clock)
Settling Time: 10 us max to 1 LSB for full-scale step
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
Channels: 24
Input Scanning Modes: 2, programmable
1. Asynchronous, under program control at any time relative to input scanning
2. Synchronous with input scanning
Ports: 3 x 8-bit (82C55 emulation); each port is programmable as input or output
Input Characteristics: 100 Ohm series, 20 pF to common.
I/O Levels: TTL
Sampling/Update Rate: 200 kHz max®
Frequency/Counters
Counter inputs can be scanned synchronously along with voltage, TC and digital scanned inputs, based either on internal
programmable timer, or an external clock source. Bus Mastering DMA provides CPU and system-independent data transfers
ensuring data acquisition performance irrespective of other system activities. Counters can be configured to clear when read,
or to totalize and clear under program control.
Channels: 4 x 16-bit; can be cascaded as 2 x 32-bit
Frequency Measurement Rate: 10 MHz max
Input Signal Range: -15V to +15V
Trigger Level: TTL
Minimum Pulse Width: 50 ns high, 50 ns low
Timer/Pulse Outputs
Channels: 2 x 16-bit
Output Waveform: Square wave
Output Rate: 1 MHz base rate divided by 1 to 65535 (programmable)
High-Level Output Voltage: 2.0V min @ -3.75 mA; 3.0V min @ -2.5 mA
Low-Level Output Voltage: 0.4V max @ 2.5 mA
NNE