Measurement Computing DBK Part 2 - Manual (Page 76)

DBK45, pg. 6 987696 DBK Option Cards and Modules
DBK45 – Specifications
Name/Function: Simultaneous Sample and Hold and
Low-Pass Filter Card
Number of Channels: 4
Input Connections: 4 BNC connectors; 4 screw-terminal sets
Output Connector: DB37 male,
mates with P1 using CA-37-x cable
Number of Cards Addressable: 64
Dimensions: 8.25” × 3.25”
Input Type: Differential
Voltage Input Ranges:
0 to ±5000 mVDC
0 to ±500 mVDC
0 to ±50 mVDC
0 to ±25 mVDC
0 to ±10 mVDC
For Custom Gains: R
GAIN
= [40,000/(Gain-1)] - 80 Ω
Input Amplifier Slew Rate: 12 V/µs minimum
Acquisition Time:
0.6 µs (10 V excursion to 0.1%)
0.7 µs (10 V excursion to 0.01%)
Channel-to-Channel Aperture Uncertainty: 50 ns
Output Droop Rate: 0.1 µV/µs
Input Gains: ×1, ×10, ×100, ×200, x500, and
user-set up to ×500
Input Offset Voltage: 500 µV + 5000/G maximum (nullable)
Input Offset Drift: ±5 + 100/G µV/°C maximum
Input Bias Current: 100 pA maximum
Input Offset Currents: 50 pA maximum
Input Impedance: 5 × 10
12 Ω parallel with 6 pF
Switchable Bias Resistors: 100 KΩ each to analog common
Gain Errors:
0.04% @ ×1
0.1% @ ×10
0.2% @ ×100
0.4% @ ×200
1.0% @ ×500
Temperature vs Gain:
±20 ppm/°C @ ×1
±20 ppm/°C @ ×10
±40 ppm/°C @ ×100
±60 ppm/°C @ ×200
±100 ppm/°C @ ×500
Non-Linearity:
±0.015 % full-scale @ ×1
±0.015 % full-scale @ ×10
±0.025 % full-scale @ ×100
±0.025 % full-scale @ ×200
±0.045 % full-scale @ ×500
Common-Mode Rejection:
70 dB minimum @ ×1
87 dB minimum @ ×10
100 dB minimum @ ×100
100 dB minimum @ ×200
100 dB minimum @ ×500
Active Filter Device: UAF42 (Burr-Brown)
Number of Poles/Filter: 3
Types of Filters: Bessel, Butterworth,
Chebyshev
Frequency Range: 0.1 Hz to 50 kHz
The frequency is set by installation of
4-6 resistors and/or capacitors in
provided socket locations.
Frequency Modules: Optional frequency
module kits are available that consist of
4 plug-in resistor/capacitor (RC)
headers. These RC headers are pre-
configured for any of the following
frequencies: 5 Hz, 10 Hz, 100 Hz,
500 Hz, or 1 kHz—all are Butterworth-
type filters.