Optimise BOM
List of changes performed before V1.0 schematic review (already included in the files for review):
- Try to migrate as many resistors as possible to 0402 (WIP).
- Replace all 10K and 33K2 resistors with 0.1% (since we need several of those anyway).
- Replace all 200R resistors with 2x100R.
- Replace all 11K with 10K+1K.
- Replace all big 0R5 damping resistors used on DC/DC converters with 0402 1R resistors.
- Replace all 43R series resistors used for external reference with 51R (5% impedance mismatch).
- Replace all 47uH inductors at the outputs of DC/DC converters with 10uH.
- [pllOsc.sch] Replace the transformer for OCXO_CLK with XFMR_MINI-CIRCUITS_ADT2-1T-1P+ (already used elsewhere).
- [pllOsc.sch] Replace 300R and 36R resistors at the output of VCO transformer with 3x 100R and 100R+51R respectively.
- [pllOsc.sch] Replace 560R PLL_CP resistors with 2x 280R.
- [fpga_regulators.sch] Use multiple 10K resistors in parallel to configure the 1V0 and 1V2 LDOs.
- [dmtd_osc.sch] replace 750R with 2x1K5 at the output of the DAC.
- [pulse_shaper.osc] replace 1K1 with 1K+100R and 390R with 2x180R + 27R.
Changes performed during the V1.0 schematic review (not visible in the files for review):
- Fix some BLM18SG221TN1 and TPS7A8901RTJT that had missing or wrong descriptions.
- [fpga_regulators.sch] Replace (again) 4x10K resistors in parallel to configure the 1V0 and 1V2 LDOs with 1K + 1K5 in series.
- Replace (again) all 2x100R with 200R.
- [pllOsc.sch] Replace (again) 3x100R with 200R+100R and 100R+51R with 33R.
- Replace all 0603 resistors with 0402