Solar Probe Plus FIELDS Quarterly Management DCB_RFS-ADC July 18, 2013

FPGA Daughter Board Development FPGA ETU Daughter board schematics and layout completed – This board houses the Actel/Microsemi reprogrammable FPGA (ProASIC3000) – Fabrication and population scheduled to accommodate integration with DCB-RFS_ADC ETU1 – HDLP Connectors delivery expected in September, 2013 Daughter board de-insertion hardware ETU FPGA Daughter board layout

DCB/RFS_ADC ETU1 Development DCB_RFS-ADC Schematics Completed – Schematic Review held in June, 2013 – BOM released and parts have been ordered DCB_RFS-ADC PCB Layout Completed 3 Boards can be driven by the RFS Frontend ETU1 boards (will be eventually integrated during the ETU2 stage) FPGA Daughter Bd CPU Memory: SRAM, EEPROM & PROM FLASH RFS Memory (SRAM) RFS ADCs and Data Buffers Instrument & LNPS I/Fs S/C I/F We are checking the layout & expect to have boards in August, 2013.

DCB/RFS_ADC ETU1 BOM Most parts are “flight-like” or high-fidelity commercial equivalents on order Linear Power supply (non-flight) replaces LNPS for ETU1 Digital I/F to LNPS is included Instrument I/Fs (to DFB, AEB and MAG-O) are included HDLP Connectors (mother to daughter board) may be the gating item But FPGA Development/Simulation is ongoing during this “waiting period” Design & fabrication of an SRAM adapter (for use of commercial parts) is underway

DCB/RFS_ADC Revised Power Estimate DCB and RFS have been combined into one board and one FPGA Revised Power Estimates include scenarios for DCB (1.6W Avg) only and DCB with RFS subsystem (2.6W Avg). We expect to be able to operate without the ADC External Reference, but have included this as an option on ETU1

DCB/RFS_ADC FPGA DCB related subsystems are well-known (Coldfire Processor has been used for the MAVEN DCB). The DCB portion of FPGA utilization is estimated at approximately 30%. RFS utilization estimated at approximately 40% of the FPGA gates. FPGA SRAM is allocated for filter coefficients and high-speed temporary storage.