- 16-Bit Resolution
- 8 Single-Ended Analog Input Channels
- Simultaneous Sampling (1 A/D Converter Per Input)
- Up to 400 kS/s Overall Throughput (100 kS/s Maximum for Any Channel)
- 8 Digital I/O
- 1 Event Counter
- External Clock I/O
- External Digital Trigger Input
- No External Power Required
The OM-USB-1608FS Series consists of thefollowing low-cost, analog and digital I/O modules:
• OM-USB 1608FS
• OM-USB-1608FS-PLUS
These modules provide eight single-ended (SE),simultaneous-sampling 16-bit analog inputs, eight DIO,one event counter, one external digital trigger input, andone bidirectional external clock.Everything you need to begin acquiring, viewing, andstoring data is included with each OM-USB-1608FSSeries module, including comprehensive softwaresupport.
SOFTWARE
OM-USB-1608FS Series modules ship with animpressive array of software, including the newTracerDAQ®, a full-featured, out-of-the-box data logging,viewing, and analysis application. Driver support anddetailed example programs are included
For Universal Library programming libraries forMicrosoft® Visual Studio® programming languages, andother languages, including DASYLab®, and ULx for NILabVIEW® (comprehensive library of Vls and exampleprograms compatible with 32-bit and 64-bit
LabVIEW v8.5 through 2013) and InstaCal™installation, calibration and test utility-powerful solutionsfor programmers and nonprogrammers alike. Thesemodules operate under Microsoft Windows® XP (32-bit only) and VISTA/7/8 (32-bit and 64-bit) operatingsystems.
The OM-USB-1608FS Series data acquisitionmodules are supplied with TracerDAQ software whichis a collection of four virtual instrument applicationsused to graphically display and store input data andgenerate output signals:
• Strip Chart—Log and graph values acquired from analog inputs, digital inputs, temperature inputs and counter inputs
• Oscilloscope—Display values acquired from analog inputs
• Function Generator—Generate waveforms for analog outputs
• Rate Generator—Generate waveforms for counter outputs
TracerDAQ PRO is an enhanced version of TracerDAQ. A comparison of some of the features included in TracerDAQ vs. TracerDAQ PRO is shown on the PDF.
ANALOG INPUT
Both modules provide eight single-ended (SE) 16-bitanalog input channels with a dedicated A/D converterper channel for simultaneous sampling. The devicesoffer software-selectable analog input ranges for±10V, ±5V, ±2V, and ±1V.
SAMPLING RATE
OM-USB-1608FS Series modules offer the followingsampling rates when scanning continuously tocomputer memory (hardware-paced mode):
• OM-USB-1608FS-PLUS - Total rate of 400 kS/sdivided by the number of channels sampled;maximum rate of 100 kS/s per channel.
• OM-USB-1608FS - Total rate of 100 kS/s dividedby the number of channels sampled; maximum rateof 50 kS/s per channel.
SIMULTANEOUS SAMPLING
In hardware paced mode, both modules can acquiredata from up to eight channels simultaneously. Theanalog data is continuously acquired, converted to digitalvalues, temporarily stored in the onboard FIFO buffer,and periodically uploaded to the computer.
CHANNEL-GAIN QUEUE
The channel-gain queue lets you configure a list ofchannels and gains for each scan. Each channel canhave a different gain setting. The gain settings arestored in a channel-gain queue list that is written tolocal memory on the device. The channel-gain queuelist for both modules can contain up to eight uniquechannels. On the OM-USB-1608FS, the channels mustbe consecutive and listed in increasing order. On theOM-USB-1608FS-PLUS, the channels can be nonconsecutive,but still must be listed in increasing order.
DIGITAL I/O
Both modules provide eight digital I/O connections.Each digital channel is individually-configurable forinput or output. When configured for input, you can usethe digital I/O terminals to detect the state of any TTLlevel input. On the OM-USB-1608FS-PLUS, the digitalI/O channels are high-drive (24 mA) connections.
COUNTER INPUT
The OM-USB-1608FS-PLUS has a 32-bit eventcounter that can accept a signal up to 1 MHz. Theinternal counter increments when the TTL levelstransition from low to high.
EXTERNAL CLOCK I/O
Each OM-USB-1608FS Series module has abidirectional external clock terminal. When configuredfor input, A/D conversions can be paced by anexternal source.The OM-USB-1608FS supports TTL-level input signalsup to 50 kHz.The OM-USB-1608FS-PLUS supports TTL-level inputsignals up to 100 kHz.When configured for output, both devices can paceA/D conversions on a second device and acquire datafrom all input channels simultaneously.
TRIGGER INPUT
OM-USB-1608FS Series modules provide an externaldigital trigger input.The OM-USB-1608FS trigger mode is edge sensitiveand software-selectable for rising or falling edge.The OM-USB-1608FS-PLUS trigger mode is edge orlevel sensitive. Edge sensitive is software-selectablefor rising or falling edge. Level sensitive is softwareselectablefor high or low level.
CALIBRATION
Each OM-USB-1608FS Series module ships fullycalibrated and can be re-calibrated at the factory.The OM-USB-1608FS also supports user calibration.
SPECIFICATIONS
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:
±15V max
Input Impedance: 100 MΩ min
Input Ranges: ±10V, ±5V, ±2 V, ±1V; software-selectable per channel
Sampling Rate (Hardware Paced) OM-USB-1608FS: 0.6 S/s to 50 kS/s, software-selectable
OM-USB-1608FS-PLUS: 0.01 S/s to 100 kS/s, software-selectable
Throughput
Software Paced: 500 S/s all channels
Hardware Paced (System-Dependent): OM-USB-1608FS: (100 kS/s)/(# of channels) max, 50 kS/s max for any channel
OM-USB-1608FS-PLUS: (400 kS/s)/(# of channels) max, 100 kS/s max for any channel
Burst Scan ≤ 32,768 Total Samples (Uses Onboard FIFO): OM-USB-1608FS: (200 kS/s)/(# of channels) max, 50 kS/s max for any channel
OM-USB-1608FS-PLUS: (800 kS/s)/(# of channels) max, 100 kS/s max for any channel
Gain Queue: OM-USB-1608FS: Up to eight elements; one gain element per unique, consecutive channel; software-selectable
OM-USB-1608FS-PLUS: Up to eight elements; one gain element per unique, ordered channel; software-selectable
Resolution: 16 bits
No Missing Codes: OM-USB-1608FS: 15 bits
OM-USB-1608FS-PLUS: 16 bits
Crosstalk (Signal DC to 25 kHz): -80 dB
CAL Output (OM-USB-1608FS Only): 0.625V, 1.25V, 2.5V, 5V
CAL Output Accuracy (OM-USB-1608FS Only): 0.5% typ, 1.0% max (actual values used for calibration are measured and stored in EEPROM)
CAL Current (OM-USB-1608FS Only): ±5 mA max
Trigger Source (Software-Selectable) External Digital: TRIG_IN
DIGITAL INPUT/OUTPUTDigital Type: OM-USB-1608FS: CMOS
OM-USB-1608FS-PLUS: 5V 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 5V via 47 kΩ resistors (default). May be changed to pull-down using an internal jumper (OM-USB-1608FS hardware revisions E and later may be changed to pull-down using an internal user-configurable jumper. Previous revisions can be configured for pull-down at the factory).
Input High Voltage Threshold: 2.0V min
Input High Voltage Limit: 5.5V absolute max
Input Low Voltage Threshold: 0.8V max
Input Low Voltage Limit: -0.5V absolute min; 0V recommended min
Output High Voltage: OM-USB-1608FS (IOH = –2.5 mA): 3.8V min
OM-USB-1608FS-PLUS: 4.4V min (IOH = -50 µA); 3.76V min (IOH = -24 mA)
Output Low Voltage: OM-USB-1608FS (IOL = 2.5 mA): 0.44V max
OM-USB-1608FS-PLUS: 0.1V max (IOL = 50 µA); 0.44V max (IOL = 24 mA)
Power On and Reset State: Input
EXTERNAL TRIGGERTrigger Source (External Digital): TRIG_IN
Trigger Mode (Software-Selectable): OM-USB-1608FS: Edge sensitive: user configurable for CMOS compatible rising or falling edge
OM-USB-1608FS-PLUS: Edge sensitive or level sensitive: user configurable for CMOS compatible rising or falling edge, high or
low level
Trigger Latency: OM-USB-1608FS: 10 µs max
OM-USB-1608FS-PLUS: 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: 1.01V typ, 0.6V min, 1.5V max
Input High Voltage Threshold: 2.43V typ, 1.9V min, 3.1V max
Input High Voltage Limit: 5.5V absolute max
Input Low Voltage Threshold: 1.42V typ, 1.0V min, 2.0V max
Input Low Voltage Limit: -0.5V absolute min, 0V recommended min
EXTERNAL CLOCK I/OPin 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: OM-USB-1608FS: 50 kHz max
OM-USB-1608FS-PLUS: 100 kHz max
Clock Pulse Width: Input: 1 μs min
Output: OM-USB-1608FS: 5 μs min
OM-USB-1608FS-PLUS: 4 μs min
Input Clock Mode: Edge sensitive, rising edge
Input Type: Schmitt trigger, 47 kΩ pull-down to ground
Schmitt Trigger Hysteresis: 1.01V typ, 0.6V min,1.5V max
Input High Voltage Threshold: 2.43V typ, 1.9V min,3.1V max
Input High Voltage Limit: 5.5V absolute max
Input Low Voltage Threshold: 1.42V typ, 1.0V min,2.0V max
Input Low Voltage Limit: -0.5V absolute min,0V recommended min
Output High Voltage: 4.4V min (IOH = -50 μA),3.80V min (IOH = -8 mA)
Output Low Voltage: 0.1V max (IOL = 50 μA),0.44V max (IOL = 8 mA)
COUNTERPin 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: 1.01V typ, 0.6V min,1.5V max
High Voltage Threshold: 2.43V typ, 1.9V min,3.1V max
Input High Voltage Limit: 5.5V absolute max
Input Low Voltage Threshold: 1.42V typ, 1.0V min,2.0V max
Input Low Voltage Limit: -0.5V absolute min,0V recommended min
Input Frequency: 1 MHz max
High Pulse Width: 500 ns min
Low Pulse Width: 500 ns min
POWER Supply Current USB Enumeration: < 100 mA
Including DIO and SYNC Output Loading: < 500 mA
+5V USB Power Available (Connected toExternally-Powered Root Port Hub
or a Self-Powered Hub): 4.5V min, 5.25V max
Output Current (Total Amount of Current that canbe Sourced from the
USB 5V and Digital Outputs):300 mA max
MEMORYData FIFO: 32,768 samples, 65,536 bytes
EEPROM: OM-USB-1608FS: 1024 bytes
OM-USB-1608FS-PLUS: 2048 bytes
GENERALOperating Temperature Range: 0 to 70°C(32 to 158°F), 0 to 90% RH non-condensing
Storage Temperature Range: -40 to 70°C(-40 to 158°F), 0 to 90% RH non-condensing
Communications: USB 2.0 hi-speed mode (480Mbps) is recommended; otherwise USB 1.1 full-speedmode (12 Mbps)
Microcontroller Type: High performance 32-bit RISC
Signal I/O Connector Type: Screw terminal
USB Cable Length: 3 m (9.84') max
Dimensions: 79 L x 82 W x 27 mm H (3.10 x 3.20 x 1.05")
Weight: 91 g (3.2 oz)
