INT7 - PCI Board of A/D Integration Converters

INT7 - internal PCI A/D Converter

Out of production since 2009, Product replaced by INT9

INT7 is an internal 24-bit A/D converter board that measures the voltages of chromatographic and electrochemical detectors. It contains up to 4 data-acquisition channels on one board (one and two channel versions are also available). The channels are completely independent, sigma delta integrating A/D converters, used for processing positive and negative voltages. The board includes four digital inputs and eight digital outputs. The first four digital outputs are also equipped also with relay contacts. The board is manufactured using the SMT montage and provides excellent reliability and temperature stability.

INT7 is the direct successor of our classic INT5 ISA card. The two share an identical analog channel design and thus, identical basic electric parameters.

Required PCI slot:

Full size PCI 2.0, 32 bit PCI slot for 5V 32 bits half-length extension card.
Low profile or PCI Express slots cannot be used.

Advantages of the INT7 A/D converter:

  • No loss of input signal during integration. There are no time delays during which the converter fails to integrate the input signal.
  • There is no continuous servicing of the input analog switches, which would otherwise cause errors (offset, noise, etc.).
  • The amount of data entering the computer is substantially smaller, since individual data items already represent partial integrals.

Next steps


  • Cable p/n KB71

Technical data:

Converter type 24 bit integrating, delta-sigma integration

Analog inputs differential

Number of channels 1, 2 or 4 fully independent, mutually isolated

Input range unipolar and bipolar, each channel independentely: 156, 1250 or 10 000 mV

Input impedance > 10 MOhm

Sample rate 10, 25.04, 50.08, 100.16 Hz

Non-linearity < 0.0015 %

Temperature dependence < 10 ppm/°C

Digital inputs 4 TTL (5 V), the first two can be controlled using the built-in opto-couplers

Digital outputs 8 TTL (5V), maximum current load 20 mA), the first four control relays

Effective resolution for various acquisition speeds and input ranges:

10 V 1 250 mV 156 mV
10 Hz 20 bit 19 bit 16 bit

50.08 Hz 18 bit 17 bit 15 bit

100.16 Hz 17 bit 15 bit 14 bit

Possible combinations:

Windows 10
(32 and 64 bit)
Windows 8.1
(32 and 64 bit)
Windows 7SP1*
INT7 Clarity
Clarity Lite
(both from 6.2)
Clarity Lite
(both from 4.0.3)
Clarity Lite

* From Clarity (Lite) 3.0 the 64-bit OS is supported.

Combinations with obsolete operating systems:

Windows VistaSP2*
Windows XPSP3 Windows 2000
INT7 Clarity, Clarity Lite
(both until 7.2)
Clarity, Clarity Lite
(until 7.4.1)
Clarity, Clarity Lite
(both until 3.0)

* From Clarity (Lite) 3.0 the 64-bit OS is supported.

A/D Converters

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Last updated: 2020-06-06 | webmaster