RAL, 17-May-2007Vladimir Rajović / Birmingham MAPS TEST PCB SCHEMATICS REVIEW.

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Presentation transcript:

RAL, 17-May-2007Vladimir Rajović / Birmingham MAPS TEST PCB SCHEMATICS REVIEW

RAL, 17-May-2007Vladimir Rajović / Birmingham What has changed since the last meeting  Power supply for the board: not 3.3V but 5V => not 5V but 4V instead, in order to avoid heat-sinking  Signal wires: not 222way; 220way instead  Two LA connectors?

RAL, 17-May-2007Vladimir Rajović / Birmingham What I forgot to draw  Ground hook(s)  Measurement of bias currents and reference voltages… Discussion anybody…?  (did not really forget) LA connector(s)

RAL, 17-May-2007Vladimir Rajović / Birmingham Power distribution

RAL, 17-May-2007Vladimir Rajović / Birmingham Current sources

RAL, 17-May-2007Vladimir Rajović / Birmingham Current sinks

RAL, 17-May-2007Vladimir Rajović / Birmingham Voltage references

RAL, 17-May-2007Vladimir Rajović / Birmingham SPISPI Daisy chain: DOUT needs to be configured waveforms for Matt

RAL, 17-May-2007Vladimir Rajović / Birmingham Probes’ Access  every named power net equipped with a dedicated jumper  6 analog signals on a dedicated header  6 digital signals on a dedicated header  forgot to draw a ground hook  and circuitry for bias currents and voltage references  

RAL, 17-May-2007Vladimir Rajović / Birmingham ConnectorsConnectors  Signal connector -> 220way  no match so far  Power supply -> tbd  low profile? how much low is low?  Logic Analyzer -> two connectors?

RAL, 17-May-2007Vladimir Rajović / Birmingham Giulio’s notes  Analog outputs: directly connected to header  4cm clearance around the sensor seems a bit too much. Do I get it well it should be a 8cm x 8cm square?  Power lines with jumpers -> done  Chip carrier package: anybody?

RAL, 17-May-2007Vladimir Rajović / Birmingham What I need in order to proceed?  Sensor footprint  Connectorrrrs   How will bias currents and reference voltages be measured?  Currents (21):  jumpers -> bulky  series resistors -> voltage drop might cause malfunction if resistance too high? instruments’ sensitivity -> is voltage drop of 30mV – 100mV acceptable?  Voltages (10):  Header(s)?