... | @@ -63,10 +63,29 @@ Projects](https://www.ohwr.org/project/fmc-projects) |
... | @@ -63,10 +63,29 @@ Projects](https://www.ohwr.org/project/fmc-projects) |
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* To get rid of the N12V0 100mV ripple, place the not-mounted C1 capacitor of 150pF. This will render the LM2611 (IC2) feedback loop stable.
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* To get rid of the N12V0 100mV ripple, place the not-mounted C1 capacitor of 150pF. This will render the LM2611 (IC2) feedback loop stable.
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* About 20% of the V4 cards have a too high ripple for the N2V9 rail, change R19 from 10k to 15k for all.
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* About 20% of the V4 cards have a too high ripple for the N2V9 rail, change R19 from 10k to 15k for all.
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* IC18_IC has its D1 (pin10) and D2 (pin9) pins floating because of a not-connected via, undetected by Altium (problem might be on previous versions as well!). When activating Ch4 and Ch5 50 Ohm termination, both channels will be electrically connected! Solder a small wire between the via and the neighbouring GND pad. [Bug reported](https://bugcrunch.live.altium.com/#Bug/3060)
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* IC18_IC has its D1 (pin10) and D2 (pin9) pins floating because of a not-connected via, undetected by Altium (problem might be on previous versions as well!). When activating Ch4 and Ch5 50 Ohm termination, both channels will be electrically connected! Solder a small wire between the via and the neighbouring GND pad. [Bug reported](https://bugcrunch.live.altium.com/#Bug/3060)
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* Modifications wrt V3:
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* OUTS_EN_n signal added to ensure outputs at high-impedance during configuration/powering
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* doubled output drivers for higher output voltage when terminated in 50 Ohms (now 2.4V)
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* unintended swap of last 4 output signals (out 4-5-6-7 wired to 7-6-5-4)!
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* output ESD protection (TVS) added
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* all comparator LVDS termination resistors now at 470 Ohms
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* DAC RC filter improved for more precise 1/4 division; equivalent resistance matching for comparator bias currents compensation
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* SPI test pads added
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* N2V9 rail resistor changed to 10k for stability
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* corrected i2c note
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* i2c temperature sensors added
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* N2V5 base resistor added to reduce HF noise (110mV -> 30mV)
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* P4V5 HF noise reduced by adding 10uF+100nF+1nF caps
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* P2V5 buck PCB improved; 1nf input cap added
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* lemo-00 is now mounted optionally
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* netname N2V5 changed to N2V9
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* replace NDS331 by FDN327 (due to availability)
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* [EDA-03287-V3](https://edms.cern.ch/item/EDA-03287-V3-0/)
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* [EDA-03287-V3](https://edms.cern.ch/item/EDA-03287-V3-0/)
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* Modifications required for proper operation:
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* Modifications required for proper operation:
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* For a stable N2V9 supply rail, change R19 from 3.9k to 10k.
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* For a stable N2V9 supply rail, change R19 from 3.9k to 10k.
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* (Above V4 via problem might theoretically be possible as well, though not seen at production)
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* (Above V4 via problem might theoretically be possible as well, though not seen at production)
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* Modifications wrt V3:
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* (to be added)
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### Development versions
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### Development versions
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- Several components were changed on EDA-03287-V2 to make it
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- Several components were changed on EDA-03287-V2 to make it
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