8-Channel Simultaneous Analog Input USB Data Acquisition Modules

The OM-USB-1608FS Series consists of the following 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, and one bidirectional external clock. Everything you need to begin acquiring, viewing, and storing data is included with each OM-USB-1608FS Series module, including comprehensive software support.

SOFTWARE
OM-USB-1608FS Series modules ship with an impressive array of software, including the new TracerDAQ®, a full-featured, out-of-the-box data logging, viewing, and analysis application. Driver support and detailed example programs are included
For Universal Library programming libraries for Microsoft® Visual Studio® programming languages, and other languages, including DASYLab®, and ULx for NI LabVIEW® (comprehensive library of Vls and example programs compatible with 32-bit and 64-bit
LabVIEW v8.5 through 2013) and InstaCal™ installation, calibration and test utility-powerful solutions for programmers and nonprogrammers alike. These modules operate under Microsoft Windows® XP (32- bit only) and VISTA/7/8 (32-bit and 64-bit) operating systems.

The OM-USB-1608FS Series data acquisition modules are supplied with TracerDAQ software which is a collection of four virtual instrument applications used to graphically display and store input data and generate 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-bit analog input channels with a dedicated A/D converter per channel for simultaneous sampling. The devices offer software-selectable analog input ranges for ±10V, ±5V, ±2V, and ±1V.

SAMPLING RATE
OM-USB-1608FS Series modules offer the following sampling rates when scanning continuously to computer memory (hardware-paced mode):
• OM-USB-1608FS-PLUS - Total rate of 400 kS/s divided by the number of channels sampled; maximum rate of 100 kS/s per channel.
• OM-USB-1608FS - Total rate of 100 kS/s divided by the number of channels sampled; maximum rate of 50 kS/s per channel.

SIMULTANEOUS SAMPLING
In hardware paced mode, both modules can acquire data from up to eight channels simultaneously. The analog data is continuously acquired, converted to digital values, 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 of channels and gains for each scan. Each channel can have a different gain setting. The gain settings are stored in a channel-gain queue list that is written to local memory on the device. The channel-gain queue list for both modules can contain up to eight unique channels. On the OM-USB-1608FS, the channels must be consecutive and listed in increasing order. On the OM-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 for input or output. When configured for input, you can use the digital I/O terminals to detect the state of any TTL level input. On the OM-USB-1608FS-PLUS, the digital I/O channels are high-drive (24 mA) connections.

COUNTER INPUT
The OM-USB-1608FS-PLUS has a 32-bit event counter that can accept a signal up to 1 MHz. The internal counter increments when the TTL levels transition from low to high.

EXTERNAL CLOCK I/O
Each OM-USB-1608FS Series module has a bidirectional external clock terminal. When configured for input, A/D conversions can be paced by an external source. The OM-USB-1608FS supports TTL-level input signals up to 50 kHz. The OM-USB-1608FS-PLUS supports TTL-level input signals up to 100 kHz. When configured for output, both devices can pace A/D conversions on a second device and acquire data from all input channels simultaneously.

TRIGGER INPUT
OM-USB-1608FS Series modules provide an external digital trigger input. The OM-USB-1608FS trigger mode is edge sensitive and software-selectable for rising or falling edge. The OM-USB-1608FS-PLUS trigger mode is edge or level sensitive. Edge sensitive is software-selectable for rising or falling edge. Level sensitive is softwareselectable for high or low level.

CALIBRATION
Each OM-USB-1608FS Series module ships fully calibrated 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 M? 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/OUTPUT
Digital 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 k? 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 TRIGGER
Trigger 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 k? 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/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:
    OM-USB-1608FS: 50 kHz max
    OM-USB-1608FS-PLUS: 100 kHz max
Clock Pulse Width:
    Input: 1 ?s min
    Output:
    OM-USB-1608FS: 5 ?s min
    OM-USB-1608FS-PLUS: 4 ?s min
Input Clock Mode: Edge sensitive, rising edge
Input Type: Schmitt trigger, 47 k? 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 ?A), 3.80V min (IOH = -8 mA)
Output Low Voltage: 0.1V max (IOL = 50 ?A), 0.44V max (IOL = 8 mA)

COUNTER
Pin Name: CTR
Counter Type: Event counter
Number Of Channels: 1
Input Type: Schmitt trigger, 47 k? 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 to Externally-Powered Root Port Hub
    or a Self- Powered Hub): 4.5V min, 5.25V max
Output Current (Total Amount of Current that can be Sourced from the
    USB 5V and Digital Outputs): 300 mA max

MEMORY
Data FIFO: 32,768 samples, 65,536 bytes
EEPROM:
    OM-USB-1608FS: 1024 bytes
    OM-USB-1608FS-PLUS: 2048 bytes

GENERAL
Operating 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 (480 Mbps) is recommended; otherwise USB 1.1 full-speed mode (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)