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# Project description
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FmcAdc100M14b4chb is a 4 channel 100MSPS 14 bit ADC card in FMC (FPGA
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Mezzanine Card) standard. Gain can be set by software in three steps:
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*/-50mV,*/-0.5V, */-5V. Offset correction is added in front of the ADC
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board, therefore voltage shift in the range of*/- 5V is independent on
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the chosen gain
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range.
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## Specification
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+==========================+=========================================+
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| Parameter | Value |
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|==========================|=========================================|
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| max. sample rate | 105 MSPS |
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| bits/sample | 14 bit |
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| channels | 4 |
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| analog bandwidth | 25 MHz |
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| input impedance | 1kOhm / 50 Ohm - software selectable |
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| gain steps | +/-50mV, +/-0.5V, +/-5V for full scale |
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| offset correction range | +/- 5V for every gain range |
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| max. gain error | +/- 3% |
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| FMC to carrier interface | FMC high pin count connector |
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| ADC interface | Serial LVDS, 2 pairs for each channel |
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+==========================+=========================================+
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## Project documents
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Full schematic - PDF file:
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4cha\_schematic.pdf)
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List of components - Excel file:
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4cha\_component\_list.xls)
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## Status
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+============+===========================================================+
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| Date | Event |
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+============+===========================================================+
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| 23-11-2009 | Selection of components, waiting for schematic symbols |
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|------------|-----------------------------------------------------------|
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| 2-12-2009 | Work on the FmcAdc100M14b4ch_a is suppressed, because |
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| | estimated performance couldn't pass the expectations |
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|------------|-----------------------------------------------------------|
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| 18-12-2009 | Specification and schematic of new version has been added |
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|------------|-----------------------------------------------------------|
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| 22-01-2010 | FmcAdc100M14b4cha upgrade. Design revised and modified, |
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| | better parameters expected. |
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|------------|-----------------------------------------------------------|
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| 10-02-2010 | New design made with 3 input ranges and programmable |
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| | offset. Need to finalise local clock circuit before PCB |
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| | layout can start. |
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+============+===========================================================+
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## Documents related to previous version
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*Second version of FmcAdc board**
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Functional specification :
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4ch\_b\_functional\_spec.pdf)
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Technical specification:
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4ch\_b\_technical\_spec.pdf)
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Schematic (PDF format):
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4ch\_b\_schematic.pdf)
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*First version of FmcAdc board**
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Functional specification :
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4ch\_a\_functional\_spec.pdf)
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Technical specification :
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FmcAdc100M14b4ch\_a\_short\_brief.pdf)
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Schematic (PDF format):
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FFmcAdc100M14b4ch\_a\_schematic.pdf)
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Analogue Anarchist's schematic review:
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[link](https://www.ohwr.org/project/fmc-adc-100m14b4cha/blob/master/trunk/documentation/specifications/FFmcAdc100M14b4ch\_review29112009byAA.pdf)
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\-- ErikVanDerBij - 24 Nov 2009
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