1. PCB Design
Preeti Mulage
03/17/2010

2. Chip Connections Six Plane PCB Four Power Planes Analog IO VDD
Digital IO VDD
Core VDD
GND
Two for routing
Inputs and outputs from the pads are at 2.5V
Inputs and outputs from the FPGA are at 2.5V/3.3V

3. FPGA Connections
iBOB (used by Prof. Dejan’s Students)

4. Level Converters
Outputs from the FPGA at 3.3V are converted to 2.5V using resistor dividers
Outputs from the chip at 2.5V are converted to 3.3 V using a comparator
Vref is generated using a Voltage Regulator

5. Voltage Regulators – LT3026
Input Voltage Range: 1.14V to 3.5V
Adjustable Output Range: 0.4V to 2.6V
Output Current: Upto 1.5A
To be used to generate:
Analog IO VDD (2.5V)
Digital IO VDD (2.5V)
VDD (1.2V)
IBIAS_L & IBIAS_R
VB & VBR

6. Components Needed Voltage Regulators
Capacitors (for the regulator and for de-coupling caps)
Resistors & Potentiometer
Test Points
SMA Connectors
Jumpers
One 20by2 Header