PDLVDS-RX — photodiode LVDS receiver

Clean-room receiver for the Miniscope Zero optical uplink: Excelitas C30737LH Si APD → OPA657 TIA → LMH7220 comparator (LVDS out, DAC-set threshold) → ADN2813 CDR → STM32H723 + USB3300 USB-HS. Design target: 50 Mbps line rate, 8b/10b (40 Mbps payload); the paper's mode: 8 Mbps Manchester (16 Mbaud), as transmitted. LT3757 flyback APD bias 150–420 V. USB-C powered; verify on any laptop over USB, no FPGA attached.

Pass 100

2026-11-05 05:04 PST (2026-11-05T13:04:01Z UTC) · commit 0eb765f (0eb765f57a8517198ecba95511ba38ff934e08ad)

ADOPTED

Zone refill after the respread (exp59 -> exp60): violations 168 -> 71 (below the pre-respread 77); 65 unconnected nets = 28 pre-existing + ~37 severance debt, the recovery campaign follows. ULPI fanout-first heal rounds next per parent order.

Nets fully routednot recorded
Pins failednot recorded
Clearance violations71
Unconnected nets65
Audit verdictFAIL

Routes — all copper layers and each layer

All layers
All layers — click the image to open the full-size SVG in a new tab.
All layersAll layers F.Cu layerF.CuIn1.Cu layerIn1.CuIn2.Cu layerIn2.CuB.Cu layerB.Cu

F.Cu In1.Cu In2.Cu B.Cu

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Pass 100 — top

Bottom

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