DBK17

4-Channel Simultaneous Sample & Hold CardFeatures• Provides four input channels withsimultaneous sample and hold• Features a separate instrumentation
amplifier and input stage for eachchannel• One system accepts up to 64 DBK17
cards for a total of 256 ­simultaneously
sampled inputs• All channels sampled within 100 nsof one another
The DBK17 simultaneous sample andhold* card allows IOtech’s data acquisition
systems to capture multiple input channels concurrently in order to eliminate
channel-to-channel time skewing. Each
DBK17 provides four channels of differential voltage input. The 16 analog input
channels of the data acquisition systems
can each accept up to four DBK17 cards, fora total of 256 analog input channels withsimultaneous sampling. When multiple
DBK17 cards are in use, all channels on
all cards are sampled at the same instant.

See DBK45 for SSH plus low-pass filter

The DBK17 allows systems to capture multiple input channels simultaneously

DBK17 Simultaneous Sample & Hold Card Block Diagram
Gain set switch

Each of the DBK17’s four channels features
an instrumentation amplifier with switch-­selectable gains of x1, 10, 100, 200, and500. Each channel is also equipped witha location for a user-selected gain resistor,
allowing you to select a custom gain up tox500. Each of the instrumentation amplifier input stages are followed by separate
sample-and-hold stages whose outputs areconnected to an output multiplexer stage.
You can connect up to four DBK17s to one
analog input channel.

SS&H
enable/bypass
header

10K

Bypass

Ch 1

Enable

200pF

SS&H

IA

10K

Control

200pF
ENB

The DBK17 is equipped with BNC input connectors. Its differential inputs
are equipped with switchable 100K bias
­resistors referenced to analog common.

Ch 2

IAS/H
Mux

Ch 3

Ch 4Signalout

IAS/HIA

S/H

Cardaddress
recognition
circuit2

P1

Outputchannelselection
HDR

Channel address lines

2

Note: Ch 1 is typical of Ch 2, Ch 3, and Ch 4

* In systems incorporating DBK products with SSH, the per-channel rate is [Maximum sample rate/(n + 1)],
where n=number of channels

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DBK17

Specifications & Ordering Information
Specifications

Connector: DB37 male, mates with P1*; BNC ­connectors
provided for signal inputs
Number of Channels: 4
Number of Cards Addressable: 64
Input Type: Differential
Voltage Input Ranges:
0 to ±5 VDC
0 to ±500 mVDC
0 to ±25 mVDC
0 to ±10 mVDC
For Custom Gains:

R user =40,000- 80
Gain-1(Ohms)

Input Amplifier Slew Rate: 12 V/µs min
Acquisition Time: 0.6 µs (10V excursion to 0.1%);
0.7 µs (10V excursion to 0.01%)
Channel-to-Channel Aperture Uncertainty: 50 ns
Output Droop Rate: 0.1 µV/µsBandwidth: 72.4 kHz
Input Gains: x1, 10, 100, 200, 500, and user determined up to 500
Input Offset Voltage: [500 + 5000/G] µV max (nullable)
Input Offset Drift: [±5 + 100/G] µV/˚C max
Input Bias Current: 100 pA max
Input Offset Current: 50 pA max
Input Impedance: 5 x 1012 Ohms parallel with 6 pF
Switchable Bias Resistors: 100K each to analog
commonOrdering Information

Gain Errors:x1		
±0.04% max
x10±0.1% maxx100
±0.2% maxx200
±0.4% maxx500
±1.0% max
Gain vs. Temperature:x1		±20 ppm/˚C maxx10±20 ppm/˚C max
x100±40 ppm/˚C max
x200±60 ppm/˚C max
x500±100 ppm/˚C max
Non-Linearity:x1		±0.015% FS max
x10±0.015% FS max
x100±0.025% FS max
x200±0.025% FS max
x500±0.045% FS max
Common-Mode Rejection:x1		
70 dB minx10
87 dB minx100
100 dB min
x200
100 dB min
x500
100 dB min

Description
4-channel simultaneous sample
and hold card

Part No.
DBK17Cables
For use with DBK10, use CA-37-x ribbon cable, orcontact factory of additional cabling options
For use with DBK60 or LogBook/360, no cable isrequired (except from DBK60 or LogBook/360 tothe A/D mainframe)
For use with no enclosure, use CA-37-x where x is thenumber of DBK devices attached
For use with DaqLab Series (internal slots), use
CA-255-2T with one board, or CA-37-2 for use with
two DBK cards (or contact factory for additional
cabling options)

Product Compatibility

Note: For simultaneous sample and hold with antialias filter, see DBK45.

✔ LogBook✔ DaqBook✔ DaqLab✔ DaqScan✔ DaqBoard/2000 Series

Power Consumption:  905 mW* Attachment to the DaqBoard/2000 Series requires a DBK200, DBK202, DBK203A, DBK209, DBK213, orDBK214

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