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USB-1616HS-2 User's Guide Specifications
49
Triggering
Table 8. Trigger sources and modes
Trigger source Explanation
Single channel analog
hardware trigger
Any analog input channel can be software programmed as
the analog trigger channel, including any of the analog expansion channels.
Input signal range: -10 V to +10 V maximum
Trigger level: Programmable (12-bit resolution)
Latency: 350 ns typical, 1.3 µs max
Accuracy: ±0.5% of reading, ±2 mV offset maximum
Noise: 2 mV RMS typical
Single channel analog
software trigger
Any analog input channel—including any of the analog expansion channels, can be selected as
the software trigger channel. If the trigger channel involves a calculation, such as temperature,
then the driver automatically compensates for the delay required to obtain the reading, resulting
in a maximum latency of one scan period.
Input signal range: Anywhere within range of the trigger channel
Trigger level: Programmable (16-bit resolution)
Latency: One scan period (maximum)
External-single
channel digital trigger
A separate digital input is provided for digital triggering.
Input signal range: -15 V to +15 V maximum
Trigger level: TTL level sensitive
Minimum pulse width: 50 ns high, 50 ns low
Latency: One scan period maximum
Digital pattern
triggering
8-bit or 16-bit pattern triggering on any of the digital ports. Programmable for trigger on equal,
not equal, above, or below a value.
Individual bits can be masked for "don't care" condition.
Latency: One scan period, maximum
Counter/totalizer
triggering
Counter/totalizer inputs can trigger an acquisition. User can select to trigger on a frequency or on
total counts that are equal, not equal, above, or below a value, or within/outside of a window
rising/falling edge.
Latency: One scan period, maximum
Frequency/pulse generators
Table 9. Frequency/pulse generator specifications
Channels 2 × 16-bit
Output waveform Square wave
Output rate 1 MHz base rate divided by 1 to 65535 (programmable)
High-level output voltage 2.0 V minimum @ -1.0 mA, 2.9 V minimum @ -400 µA
Low-level output voltage 0.4 V maximum @ 400 µA
Power consumption
Power consumption specification is for a USB-1616HS-2. Add 400mW for a USB-1616HS-2 connected to an
AI-EXP48 expansion module.
Table 10. Power consumption specifications (Note 5)
Power consumption (per board) 3000 mW