Jerry Quiroga 2-10-11 EE 491 /* Total Board Areas for Each Subsystem */ Total Board Space: 50 mm X 50 mm X 2 -- 4 X 5 X 5 X 2 Available Board Space: 4800 mm^2 CPU: 12 mm X 12 mm = 144 mm^2 Crystal: 2 X 2 X 8.1 -------------------------------------- 10 mm X 10 mm on both sides 250 mm^2 Traces: JTAG: Total: Budget->900 mm^2 SPA: 4 Pin Connector Budget->200 mm^2 Variable Voltage Supply: Budget->100 mm^2 Current Measurement System: switches: 2X65 mm^2 OPA129UB: 35 mm^2 INA128U: 35 mm^2 MAT14: 60 mm^2 Resistors & Capacitors: Traces -------------------------------------------------- Total: 750 mm^2 Budget: 1500 mm^2 Power Supply: REG101: 3.3 V->10 mm^2 REF5050: 35 mm^2 OPA277: 35 mm^2 LT3463: 10 mm^2 capacitors/Inductors/Resistors: 100 mm^2 Traces: 190 mm^2 ---------------------------------------------------- Total: 380 mm^2 Budget: 600 mm^2 Probe Connectors (Through Hole): 100 mm^2 Per Side Per Connection Total: 400 mm^2 Budget: 400 mm^2 Total Budget: 4100 mm^2 Contingency: 700 mm^2 With RAM: 200 mm^2 Chip Traces: 200 mm^2 New Budget: 4500 mm^2 New Cost: 300 mm^2 /* Total Amounts of Power for Each Subsystem */ CPU: 1 mW DAC: 50-700 uA->150 uW-2.1 mW Crystal: 0.1 mW ------------------------------------ Total Budget: 3.2 mW SPA: 0 mW Current Measurement System: OPA129: 1.5 mA X 36 V = 72 mW INA128: 750 uA X 36 V = 30 mW AQV414EA: 2 X 1.8 mA X 1.5 V = 5.4 mW MAT14: Power Supply: REG101: 1 mA X 1.7 V = 1.7 mW oP-AMP: 825 uA X 36 mV = 35 mW REF5050: 1 mA X 10 V = 10 mW Switching: 28 uA X 10 V = 0.3 uW Probe: 100 uA X 20 V = 2 mW Additional Power: 50 mW --------------------------------------------------- Total: 180 mW Variable Voltage Supply: LT6011: 100 uA X 40 V = 4 mW