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22. DATA ACQUISITION SPECIFICATIONS
22.1
Analog Inputs (data acquisition units only)
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Number of inputs: 16 differential or 32 single-ended (user selectable)
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A/D resolution: 16 bits (1/65,536 of full scale)
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Input ranges,
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Bipolar: ±10V, ±5V, ±2.5V, ±1.25V
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Unipolar: 0-10V, 0-5V, 0-2.5V
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Input bias current: 50nA max
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Maximum input voltage: ±10V for linear operation
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Over-voltage protection: ±35V on any analog input without damage
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Nonlinearity: ±2LSB, no missing codes
Drift: 10PPM/ o C typical
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Conversion rate: 100,000 samples per second max
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Conversion trigger: software trigger, internal pacer clock, or external TTL signal
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FIFO: 2048 samples, programmable interrupt threshold
22.2
Analog Outputs (data acquisition units only)
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No. of outputs: 4
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D/A resolution: 12 bits (1/4096 of full scale)
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Output ranges,
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Unipolar: 0-10V or user-programmable
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Bipolar: ±10V or user-programmable
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Output current: ±5mA max per channel
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Settling time: 4µS max to ±1/2 LSB
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Relative accuracy: ±1 LSB
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Nonlinearity: ±1 LSB, monotonic
22.3
Digital I/O
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No. of lines: 40
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Compatibility: 3.3V and 5V logic compatible
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Input voltage: Logic 0: -0.5V min, 0.8V max; Logic 1: 2.0V min, 5.5V max
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Input current: ±1µA max
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Output voltage: Logic 0: 0.0V min, 0.4V max; Logic 1: 2.4V min, 3.3V max
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Output current: Logic 0: 12mA max; Logic 1: -8mA max
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I/O capacitance: 10pF max
22.4
Counter/Timers (data acquisition units only)
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A/D pacer clock: 24-bit down counter
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Clock source: 10MHz, 1MHz or external signal
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General purpose: 16-bit down counter
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Clock source: 10MHz, 100KHz or external signal
Hercules III User Manual Rev A.2
www.diamondsystems.com
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83
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