NI USB-6008/6009 User Guide and Specifications
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External Reference and Power Source
The NI USB-6008/6009 creates an external reference and supplies a power source. All voltages are
relative to ground (GND).
+2.5 V External Reference
The NI USB-6008/6009 creates a high-purity reference voltage supply for the ADC using a multi-state
regulator, amplifier, and filter circuit. You can use the res2.5 V reference voltage as a signal for
self-test.
+5 V Power Source
The NI USB-6008/6009 supplies a 5 V, 200 mA output. You can use this source to power external
components.
Note
When the device is in USB suspend, the output is disabled.
Specifications
The following specifications are typical at 25 °C, unless otherwise noted.
Analog Input
Analog inputs
Differential .....................................................4
Single-ended ..................................................8, software-selectable
Input resolution
NI USB-6008
Differential .............................................12 bits
Single-ended ..........................................11 bits
NI USB-6009
Differential .............................................14 bits
Single-ended ..........................................13 bits
Max sample rate (aggregate)
1
NI USB-6008 .................................................10 kS/s
NI USB-6009 .................................................48 kS/s
Converter type........................................................Successive approximation
AI FIFO..................................................................512 bytes
Timing resolution...................................................41.67 ns (24 MHz timebase)
Timing accuracy.....................................................100 ppm of actual sample rate
Input range
Differential .....................................................±20 V
2
, ±10 V, ±5 V, ±4 V, ±2.5 V, ±2 V,
±1.25 V, ±1 V
Single-ended ..................................................±10 V
1
System-dependent.
2
±20 V means that |AI+ – (AI–)|
≤
20 V. However, AI+ and AI– must both be within ±10 V of GND. Refer to the
section for more information.
