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 42

2026-11-04 11:57 PST (2026-11-04T19:57:05Z UTC) · commit d247c5c (d247c5c9e3ed4b0c305fdae9788a7a96988387ad)

ADOPTED

cluster clearing U6 west disc (83,44) r3.5: USB_RST U6.40 not connected by astar even in the cleared field (fanout-model seal)

Nets fully routednot recorded
Pins failednot recorded
Clearance violations3
Unconnected nets49
Audit verdictFAIL

Routes — all copper layers and each layer

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

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

Top

Pass 42 — top

Bottom

Pass 42 — bottom

← Pass 41 · all passes · Pass 43 →