2-Channel Dynamic Signal-Input Card for OMB-DAQBOARD-2000 Series and OMB-LOGBOOK

OMB-DBK4

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Offers a Per-Channel Programmable Gain Amplifier for ±50 mV, ±500 mV, or ±5 V FS Input
Includes a Built-In Current Source for ICP Transducer Biasing
Offers Per-Channel Anti-Aliasing Filters
Provides Per-Channel Simultaneous Sample and Hold
Accommodates Either AC or DC Coupled Signals
Both Dynamic Analog Inputs Sampled Within 50 ns of Each Other

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Description

The 2-channel OMB-DBK4 dynamic signal-input card enables OMB-LOGBOOK and OMB-DAQBOARD-2000 Series data acquisition systems to accommodate inputs from piezoelectric transducers, such as accelerometers or microphones, as well as from various other dynamic signal sources. Each OMB-DBK4 card is equipped with two BNC connectors and footprints for two user-installed Microdot connectors, permitting it to easily accommodate most transducer connections.

Architecture
The OMB-DBK4 provides per-channel, constant current source outputs, programmable gain amplifiers, programmable anti-aliasing filters, and sample and hold amplifiers.

Specifications
Channels: 2
Connectors: DB37 male, 1 BNC per channel, and footprints for one
user-provided Microdot connector per channel
Current Source:
Output Impedance: >1.4 M .
Compliance: 27 V
Current Levels: 2 and 4 mA (jumper selectable)
Input Impedance: 150 K .
Input Ranges: ±50 mV, ±500 mV, and ±5 V FS;
additional full scale ranges are available
when combined with the OMB-LOGBOOK’s
or OMB-DAQBOARD-2000 Series
on-board programmable A/D ranges
Coupling: AC and DC
AC High-Pass Filters: Per-channel,
1-pole HPF with 10 Hz or 0.1 Hz cutoff,
selectable via jumper
Input Signal/Noise: >96 dB (BW=100 kHz)
Amplitude Accuracy: ±0.5 dB passband center
Low-Pass Filter: Software selectable, 12-pole Butterworth filter,
with cutoff frequencies of 18 kHz, 9 kHz, 4.5 kHz, 2.25 kHz,
1.125 kHz, 562.5 Hz, 281.2 Hz, and 141.6 Hz;
each channel can be configured for a different cutoff frequency
Power Consumption: 2750 mW (When multiple OMB-DBK4 cards
are used, an OMB-DBK32A
auxiliary power supply may be required.)
Cables: Use OMB-CA-37-x cable with OMB-LOGBOOK
and OMB-DAQBOARD-2000 Series