Datasheet

Measurement Computing [phone]
4
[e-mail] mccdaq.com
USB-1608FS-Plus
Specifications
All specifications are subject to change without notice. Typical for 25 ˚C unless
otherwise specified.
Analog Input
A/D converter type: 16-bit successive approximation type
Channels: 8 single-ended
Input configuration: Individual A/D per channel
Sampling method: Simultaneous
Absolute maximum input voltage (CHx IN relative to GND): ±15 V max
Input impedance: 100 MΩ min
Input ranges: ±10 V, ±5 V, ±2 V, ±1 V; software-selectable per channel
Sample rate (hardware paced): 0.01 S/s to 100 kS/s, software-selectable
Throughput
Software paced: 500 S/s all channels
Hardware paced (system-dependent): (400 kS/s)/(# of channels) max,
100 kS/s max for any channel
Burst scan ≤ 32,768 total samples (uses onboard FIFO):
(800 kS/s)/(# of channels) max, 100 kS/s max for any channel
Gain queue: Up to eight elements; one gain element per unique, ordered chan-
nel; software-selectable
Resolution: 16 bits
No missing codes: 16 bits
Crosstalk (signal DC to 25 kHz): –80 dB
Trigger source (software-selectable): External digital - TRIG_IN
Analog Input DC Voltage Measurement Accuracy
Calibrated Absolute Accuracy
Range Accuracy
±10 V 5.66 mV
±5 V 2.98 mV
±2 V 1.31 mV
±1 V 0.68 mV
Accuracy Components (All Values are (±))
Range Gain Error
(% of Reading)
Gain Error at
Full Scale
Offset
±10 V 0.04 4.00 mV 1.66 mV
±5 V 0.04 2.00 mV 0.98 mV
±2 V 0.04 0.80 mV 0.51 mV
±1 V 0.04 0.40 mV 0.28 mV
Noise Performance*
Range Typical Counts Least Significant
Bit
Root Mean Square
(LSB
RMS
)
±10 V 10 1.52
±5 V 10 1.52
±2 V 11 1.67
±1 V 14 2.12
* Noise distribution is determined by gathering 50 kS with inputs tied to ground
at the user connector. Samples are gathered at the maximum specified sample
rate of 100 kS/s per channel.
Digital Input/Output
Digital type: 5 V TTL
Number of I/O: 8 (DIO0 through DIO7)
Configuration: Independently configured for input or output
Pull-up/pull-down configuration: All pins pulled up to 5 V via 47 kΩ resistors
(default). May be changed to pull-down using an internal jumper.
Input high voltage threshold: 2.0 V min
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 0.8 V max
Input low voltage limit: –0.5 V absolute min; 0 V recommended min
Output high voltage: 4.4 V min (IOH = –50 µA); 3.76 V min (IOH = –24 mA)
Output low voltage: 0.1 V max (IOL = 50 µA); 0.44 V max (IOL = 24 mA)
Power on and reset state: Input
External Trigger
Trigger source: External digital - TRIG_IN
Trigger mode (software-selectable): Edge sensitive or level sensitive: user configu-
rable for CMOS compatible rising or falling edge, high or low level.
Trigger latency: 2 µs + 1 pacer clock cycle max
Trigger pulse width: 1 µs min
Input type: Schmitt trigger, 47 kΩ pull-down to ground
Schmitt trigger hysteresis: 1.01 V typ, 0.6 V min, 1.5 V max
Input high voltage threshold: 2.43 V typ, 1.9 V min, 3.1 V max
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 1.42 V typ, 1.0 V min, 2.0 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
External Clock I/O
Pin name: SYNC
Pin type: Bidirectional
Direction (software-selectable)
Input: Receives A/D pacer clock from external source;
Output: Outputs internal A/D pacer clock
Input clock rate: 100 kHz max
Clock pulse width: 1 µs min input, 4 µs min output
Input clock mode: Edge sensitive, rising edge
Input type: Schmitt trigger, 47 kΩ pull-down to ground
Schmitt trigger hysteresis: 1.01 V typ, 0.6 V min, 1.5 V max
Input high voltage threshold: 2.43 V typ, 1.9 V min, 3.1 V max
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 1.42 V typ, 1.0 V min, 2.0 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Output high voltage: 4.4 V min (IOH = –50 µA), 3.80 V min (IOH = –8 mA)
Output low voltage: 0.1 V max (IOL = 50 µA), 0.44 V max (IOL = 8 mA)
Counter
Pin name: CTR
Counter type: Event counter
Number of channels: 1
Input type: Schmitt trigger, 47 kΩ pull-down to ground
Input Source: CTR screw terminal
Resolution: 32 bits
Schmitt trigger hysteresis: 1.01 V typ, 0.6 V min, 1.5 V max
Input high voltage threshold: 2.43 V typ, 1.9 V min, 3.1 V max
Input high Voltage limit: 5.5 V absolute max
Input low voltage threshold: 1.42 V typ, 1.0 V min, 2.0 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Input Frequency: 1 MHz max
High pulse width: 500 ns min
Low pulse width: 500 ns min
Power
Supply current: < 100 mA USB enumeration; < 500 mA with DIO and SYNC
output loading.
+5 V USB power available (connected to externally-powered root port hub or a
self-powered hub): 4.5 V min, 5.25 V max
Output current (total current that can be sourced from the USB +5V and digital
outputs): 300 mA max
USB
Device type: USB 2.0 (full-speed)
Device compatibility: USB 1.1, USB 2.0
Specifications