Successive Approximation ADC
- 1. EECS 631: FINAL PROJECT Successive Approximation ADC Project Team: Ankit Master Kevin Tham
- 2. Design Specifications • Dynamic Range: 0 – 4V • Supply Voltage: 5V • Resolution: 7-bit • 1 LSB: 31.25mV • Speed/Clock Frequency: 10 MHz • Sampling rate : 100 ksps Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 3. Architecture Complete architecture implementation (Ref: CMOS Analog Circuit Design by Allen & Holdberg) Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 4. Logic module Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 5. 1) Vin = 0.9 V Logic Operation Step Q6Q5Q4Q3Q2Q1Q0 B’6B’5B’4B’3B’2B’1B’0 Vdac_out (V) Vcomp B6B5B4B3B2B1B0 1 1000000 1000000 2 1 0000000 2 0100000 0100000 1 1 0000000 3 0010000 0010000 0.5 0 0010000 4 0001000 0011000 0.75 0 0011000 5 0000100 0011100 0.875 0 0011100 6 0000010 0011110 0.9375 1 0011100 7 0000001 0011101 0.89625 0 0011101 2) Vin = 2.3 V Step Q6Q5Q4Q3Q2Q1Q0 B’6B’5B’4B’3B’2B’1B’0 Vdac_out (V) Vcomp B6B5B4B3B2B1B0 1 1000000 1000000 2 0 1000000 2 0100000 1100000 3 1 1000000 3 0010000 1010000 2.5 1 1000000 4 0001000 1001000 2.25 0 1001000 5 0000100 1001100 2.375 1 1001000 6 0000010 1001010 2.3125 1 1001000 7 0000001 1001001 2.28125 0 1001001
- 7. Layout Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 9. Reset circuitry Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 10. Pre-layout Simulation Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 11. Layout Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 12. Post-layout simulation Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 13. Opamp Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 14. Post-layout simulation Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 15. DAC module Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 16. DAC Layout Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 17. Post-layout simulation Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 18. Track and hold Left: Schematic Bottom: Layout
- 19. Comparator module Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 20. Comparator Layout Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 21. Top level Design Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 22. Pre-layout Simulation Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 23. Post-layout Simulation Ankit Master & Kevin Tham University of Tennessee, Knoxville
- 24. Padframe Ankit Master & Kevin Tham University of Tennessee, Knoxville