L-780M Multifunctional ADC/DAC board with DSP

Multifunctional ADC/DAC board with DSP
  • ADC: 14 bits / 400 kHz
  • Input channels: 16 differential or 32 with "common ground"
  • Digital signal processor
  • Digital inputs/outputs: 16/16
  • PCI 5.0V Card (5.0V Add-in Card)
  • Two-channel DAC (optional)

Universal board for input/output of analog and digital signals to/from PC with the possibility of their digital processing in real time.

As an option, you can install the DAC.

The signal processor on the board performs timing and synchronization of the ADC and DAC operation, organizes buffering and data exchange with PC via a dual-port RAM.

Channel switching during multichannel data acquisition is automatic, with a random channel selection order and gain.

It is possible to generate interrupts when a part of FIFO buffer of ADC and DAC is filled.

Number of channels 16 differential or 32 with "common ground"
Resolution 14 bits
Effective resolution 
(input signal - 10 kHz sine / 4,9V)
13,3 bits (conversion frequency is 300 kHz)
Input impedance (at single-channel mode) Not less than 1 MOhm
Input signal measuring sub-ranges ± 5 V, ±1,25 V, ±0,3 V, ±0,08 V
Maximum conversion frequency 400 kHz
  • Internal
  • By external synchro-signal
  • By analog signal level
Inputs protection ± 25 V (power on)
± 10 V (power off)
Inter-channel interference -70 dB (input signal - 10 kHz sine with output source impedance less than 1 kOhm)
Digital signal processor
Type ADSP 2185M
Sample rate 29,5 MHz
Internal data RAM 16 Ksamples
Internal program RAM 16 Ksamples
FIFO-buffer 512 - 14336 samples
Data exchange speed via PCI bus
Referring to the board registers through the I/O ports Up to 1,2 Mbps
Referring to the board registers through PC memory Up to 10 Mbps
DAC (option)
Number of voltage outputs with common ground 2
Resolution 12 bits
Setting time 8 μs
Output range ±5 V
Output current, no more than 2 mA
Digital inputs and outputs
Number of inputs 16 parallel, asynchronous
Number of outputs 16 parallel, asynchronous with common resolution outputs
Type of logic CMOS (74 НСТ), TTL-compatible
Dimensions       170x105 mm
  • L-780M
    L-780 board with ADSP-2185M, no DAC
  • ОР-780D
    DAC installation


  • l7xx_programmers_guide.pdf (filesize: 2 260 604 bytes, date: 22.10.2007)

    DOS Programmer's Guide for L-780 and L-783 PCI boards in Adobe Acrobat format.

  • l7xx_users_guide.pdf (filesize: 2 268 313 bytes, date: 18.01.2019)

    User’s Guide for L-780 and L-783 PCI boards in Adobe Acrobat format.

LGraph2 software package

  • lgraph2.zip (filesize: 26 786 707 bytes, date: 11.10.2021)

    LGraph2 is a free multi-channel data recorder for Windows. Version 2.35.20 provides the possibility of simultaneous data visualization and recording from the ADCs: L-502, L-780M, L-783, L-791, E-502, E14-140, E14-140M, E14-440, E-154, E20-10, LTR11, LTR114, LTR27, LTR212, LTR216, LTR22, LTR24, LTR25, LTR51. It requires an updated version of the LComp driver (from version 01.04.2010) and ltrserver (no lower than

Software for Windows

  • lcomp.exe (filesize: 6 342 216 bytes, date: 12.05.2021)

    Beta version. LCOMP library for Windows XP/Vista/Win7/Win8/Win10 32 and 64-bit versions with drivers. The installer and drivers are digitally signed. The library is built on the basis of modern WDM-drivers rewritten on WDF. It includes the WDM driver itself for L-CARD hardware, the DLL library with source code, programming examples, electronic description, etc. The LCOMP library provides support for almost the entire range of products: PCI boards, USB modules. ISA support is excluded.

    The library includes “L-Graph I” software. L-Graph I supports the following devices: L-1450, L-761, L-780, L-783, L-791, E14-140, E-154 and E14-440. Files recorded by L-Graph I can also be read and processed using the demo-version of PowerGraph v.3.X.


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Fax: +7 (495) 785-95-14

Sales department: en@lcard.ru
Technical support: en@lcard.ru

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Moscow 117105
Russian Federation

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