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InstruTECH ITC-1600: 16-bit multi-channel data
acquisition system
ITC-1600-2:
dual rack version shown
ITC-1600 system features
- Expandable
fully synchronized data acquisition system
- All
synchronous analog and digital channels are optically isolated
- Easy
installation
- Compatible
with Windows9x, ME, NT, 2000, XP, Vista, MacOS classic, MacOS X (PPC
and Intel), LabView for Windows, and MatLab
I-1600 rack features
- Eight
differential analog input channels
- Two
16-bit 200 kHz A/D converters multiplexed into two banks of four input
channels
- Simultaneous
sampling on two channels (one from each bank) at 200 kHz per channel
- Analog
input range: + 10.24 Volts
- Four
pseudo differential analog output channels
- Four
24-bit D/A converters (16-bit data)
- Analog
output range: + 10.24 Volts
- Sixteen
synchronous digital input channels
- Thirty-two
synchronous digital output channels, fourteen with current sink
- Sixteen
asynchronous digital output channels
PCI-1600 features
- Each
PCI-1600 host supports two fully synchronized I-1600 rack units
- Bus
Mastering PCI host interface
- Universal
PCI, 3.3 or 5 Volt bus
- Phase
Lock Loop clock IN/OUT for multi card synchronization
PCI-1600e features
- Each
PCI-1600e host supports two fully synchronized I-1600 rack units
- Bus
Mastering PCIexpress host interface
- PCIexpress
1X lane
- Phase
Lock Loop clock IN/OUT for multi card synchronization
The ITC-1600 is an expandable 16-bit data acquisition system designed by InstruTECH.
The ITC-1600 utilizes the newest fiber optic and digital signal
processing technologies, in addition to many of the exceptional features of
its predecessors the ITC-16 and ITC-18.
The ITC-1600 provides expandability and versatility that will
satisfy both current and future needs.
Hardware Configuration
The ITC-1600 system comprises of a PCI-1600 or a PCI-1600e computer
interface card, one or two I-1600 analog rack units connected by the
InstruLINK fiber optic data cables.
Each PCI-1600 or PCI-1600e Bus mastering host interface card
supports one or two I-1600 rack units.
If two rack units are used, then all input and output channels are
doubled and fully synchronized. For
systems requiring even more channels, multiple PCI-1600 / PCI-1600e and
I-1600 units can be used. Multiple
PCI-1600 / PCI-1600e cards installed in the same or in separate computers
will be fully synchronized.
This split configuration offers major advantages over traditional
data acquisition designs. One
advantage is noise performance.
Most data acquisition devices are printed circuit boards installed
directly into the computer. The
interior of a computer is an electrically noisy environment that will
dramatically affect the noise performance of high speed D/A and A/D
converters. Mounting all of the
analog electronic components in an external box provides the most effective
means of shielding the analog signal from this noise.
Another advantage is
the capability to use the analog front end (I-1600 rack unit) with a
variety of host interfaces, as they become available. Moving the I-1600 from one computer
platform to another is a simple matter of using the appropriate host
interface, and installing compatible software. Utilizing the same hardware when changing computer platforms
provides a cost effective upgrade path to newer computer technologies
without sacrificing your initial investment.
Optical Isolation
The analog electronics of the I-1600 rack unit are
optically isolated from the digital circuitry of the computer via the
InstruLINK fiber optic circuitry. This circuitry provides superb optical isolation,
virtually eliminating ground loops, while increasing the distance between
the computer and the recording setup to at least five meters. The inter-connecting fiber optic cables
are small, flexible, and, unlike conventional electrical cables do not emit
electromagnetic radiation.
Optical isolation provides complete electrical isolation
between the computer and the measuring equipment. Computers contain digital electronics that switch at high
speed, producing large electrical transients. The computer ground functions as the return path for these
transients, resulting in substantial high frequency ground noise. Each I-1600 (rack unit) has a separate
analog ground that is isolated from the computer ground.
Optical Isolation is essential if low-noise analog
outputs are desired.
Analog I/O
Each I-1600 rack unit provides eight differential analog
input channels that are separated into two banks of four. Each bank uses one 16-bit 200kHz A/D
converter multiplexed into four inputs.
Both A/D converters sample simultaneously and synchronously at the
maximum conversion rate resulting in a total throughput of 400kHz. This unique arrangement allows pairs of
channels to be digitized without phase-shift. If the bandwidth of the experiment calls for lower sampling
rates, the DSP decimates and/or filters the data. An added benefit of filtering is the reduction of noise.
Each I-1600 rack unit provides four 24-bit D/A
converters, stripped to 16-bit data.
This results to outputs that feature high accuracy with less than 1
bit (~300 µV) of noise.
This extremely low noise allows for the observation of least
significant bit transitions. The D/A circuitry used in the I-1600 rack unit
is temperature stabilized and “De-glitched” for ideal performance. A typical D/A circuit will have a large
glitch energy around zero and major bit transitions, the I-1600's D/A
converters are free from this artifact.
In addition,
each I-1600 rack unit provides four 12-bit asynchronous “telegraphing” ADC channels
are available for monitoring slow changing parameters.
Digital I/O
Each I-1600 rack unit has twenty digital inputs and
thirty-six digital output channels all sampling synchronously. The digital input channels feature level
sensitive or latched modes. For
maximum versatility the inputs can be inverted, allowing rising or falling
edge triggering.
Available Host Interfaces
PCI-1600
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The PCI-1600 host
interface card is a Bus mastering short form factor, 32-bit, 33 MHz Universal
PCI (5 or 3.3 Volt) plug in card.
The PCI-1600 is compatible with Apple, PC, and other computer
systems that feature PCI Bus slots.
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PCI-1600e
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The PCI-1600e host interface card is a Bus mastering
short form factor, 32-bit, 1X lane PCIexpress plug in card. The PCI-1600e is compatible with
Apple, PC, and other computer systems that feature PCIexpress slots.
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Technical Specifications
Analog inputs:
Number of channels 8,
2 ADC
MUXA
channels 0-3,
MUX
B channels 4-7
Input type differential,
optically isolated
Type of ADC successive
approximation
Input connector BNC
on front panel
Resolution 16-bit,
1 in 65536
Acquisition rate 400 kHz
aggregate
200 kHz
per ADC
Input range -10.24
to +10.239Volts
Aperture delay 10
ns maximum
Aperture jitter 50
ps rms maximum
Conversion speed software
selectable
minimum
5 µs per ADC
Differential nonlinearity ±0.002% of FSR
Drift ±2
ppm/°C
Input impedance 1 MΩ
Signal-to-noise ratio 86 dB
at DC to 160kHz
<
1 mV PP
No missing codes 16-bit
Crosstalk between ADC
not measurable
Crosstalk between MUX
-110 dB 20 Volt 1 kHz sine
Maximum over voltage ±40 Volts
Analog outputs:
Number of channels 4,
individual D/A converters
Output type pseudo
differential
optically
isolated
Type of DAC double
buffered, multiplying
Output connector BNC
Resolution 24-bit
converter
16-bit
data (1 in 65536)
Output range -10.24
to +10.239 Volts
Conversion speed software
selectable
minimum
5 µs each
Settling time <4 µs to 0.001%
Gain error 0.2%
of FSR
Gain linearity <2 dB
Drift ±4
ppm/°C,
after
10 minute warm up
Signal-to-noise ratio 116 dB
Output impedance 10Ω
(for
output overload protection)
Short circuit to ground indefinite
Current output ±20 mA
maximum
Capacitance drive 200 pF
Asynchronous “telegraphing” inputs:
Number of channels 4,
single-ended
Input connector BNC
on rear panel
Resolution 12-bit
Acquisition rate 5 kHz
aggregate
Input range ±10 Volts
Max. input over voltage ±40 Volts
Digital inputs:
Number of inputs 20,
logic level
optically
isolated
Input type 3.3
and 5 Volt logic
Operational mode selectable,
level
or latching,
active
high or low
Minimum pulse width 150
ns
Input connectors 4
front panel BNC, 16 on rear panel connector
Maximum over voltage ±30 Volts
D.C.
Trigger In:
Number of inputs 1,
optically isolated
Input type 3.3
and 5 Volt logic
Operational mode selectable,
edge,
level,
active high or low
Minimum pulse width 150
ns
Input connector BNC
on front panel
Maximum
over voltage ±30 Volts D.C.
Digital outputs:
Number 36,
optically isolated
Output driver 3.3
Volt, TTL, LS, ACT,
and
HCT compatible
Output connectors 4
on front panel BNC with
LED
indicators
32
on rear panel connector
Sink output current 6.4
mA (front panel),
3.2
mA (rear panel)
Source output current 6.4
mA (front panel),
3.2
mA (rear panel)
Power-on state logic
low
Trigger Out:
Number of outputs 1,
optically isolated
Output driver 3.3 Volt,
TTL, LS, ACT,
and
HCT compatible
Output connector BNC
on front panel
Output current 6.4 mA
sink or source
Software and Drivers:
* MacOS Classic C/C++ Metrowerks libraries
Carbon
Driver and Framework library
Wavemetrics
IGOR Pro XOP’s
AxoGraph
MacOS X (PPC) Carbon
Driver and Framework library
Wavemetrics
IGOR Pro Carbon XOP’s
AxoGraphX
InstruTECH AcquireT
MacOS X (Intel) Framework
library
Wavemetrics
IGOR Pro Carbon XOP’s
AxoGraphX
InstruTECH AcquireT
* Windows 9x, ME, NT, 32 bit C/C++ library, DLL and driver
2000, XP, Vista Wavemetrics
IGOR Pro XOP’s
National Instruments LabView
MathWorks MATLAB
AxoGraphX
Strathclyde
WinWCP
InstruTECH AcquireT and ECELL
* No longer supported but still
available upon request.
All drivers are available for download.
PCI-1600 host
interface:
Form
factor short,
32-bit, 33 MHz,
3.3 or 5 Volt PCI
Type Bus mastering,
PCI 2.1 compliant
Cable 1 pair 5 meter fiber optic
1 pair per I-1600 rack unit
Connectors 2 pair InstruLINK fiber (TX/RX),
Unisolated Trigger In,
Unisolated Trigger Out,
PLL Clock-In,
PLL Clock-Out
PCI-1600e host
interface:
Form
factor short, 32-bit,
33 MHz
Type Bus
mastering, 1X lane PCIexpress
Cable 1 pair 5 meter fiber optic
1 pair per I-1600 rack unit
Connectors 2 pair InstruLINK fiber (TX/RX),
Unisolated Trigger In,
Unisolated Trigger Out,
PLL Clock-In,
PLL Clock-Out
A note about Macintosh G5 computers
Apple
has once again changed the PCI bus on their Power Mac G5 desktop
computers. The latest release, as
of November 2005, use’s a PCIexpress bus architecture, including Intel
based systems. The PCIexpress bus
IS NOT compatible with the PCI-1600 host interface. For PCIexpress computer system please
order the PCI-1600e host instead.
Power
Mac G5 computers before November 2005, used a 3.3 Volt PCI /PCI-X bus
architecture. These systems are
compatible with PCI-1600’s built after April 2004.
Model Numbers:
ITC-1600: Single rack
system: Includes
1 I-1600 rack unit, 1 PCI-1600 and 1 pair InstruLINK fiber optic cables.
ITC-1600e: Single rack
system: Includes
1 I-1600 rack unit, 1 PCI-1600e and 1 pair InstruLINK fiber optic cables.
ITC-1600/2: Dual rack system: Includes 2 I-1600 rack unit, 1
PCI-1600 and 2 pair InstruLINK fiber optic cables.
ITC-1600/2e: Dual rack system: Includes 2 I-1600 rack unit, 1
PCI-1600e and 2 pair InstruLINK fiber optic cables.
I-1600: I-1600
analog rack unit for expanding ITC-1600 system. Includes 1 pair InstruLINK fiber optic cables.
Dimensions:
Width:
19" (47.5cm)
Height:
1.75" (4.375cm),
Depth:
6" (15 cm)
Weight:
8 pounds (3.6 kg)
Power requirements:
85-264 VAC,
47-440 Hz, 25 Watts
Warranty:
One year parts and labor
Specifications are typical at 25oC
unless otherwise noted.
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