A simple bandgap topology is evaluated with a set of simulations and then implemented in open-source EDA tools. Please refer to this git repo for detailed information on the design (https://github.com/vsdip/avsdbgp_3v3_sky130_v1).
| Parameter | Description | Min | Type | Max | Unit | Condition |
|---|---|---|---|---|---|---|
| Technology | 130 nm CMOS Process | |||||
| RL | Load resistance at Vbgp terminal | 100 | Mohm | VDD=3.3V, T=27C | ||
| Vbgp | Output Reference voltage | 1.197642 | 1.201057 | 1.212476 | V | T=-40 to 140C, VDD=3.3V |
| Vbgp | Output Reference voltage | 1.178285 | 1.201057 | 1.211677 | V | VDD=2.7V to VDD=3.6V, T=27C |
| TC_vbgp | Temperature Coefficient of Vbgp | 6.8717 | ppm/C | T=-40 to 140C, VDD=3.3V | ||
| VC_vbgp | Voltage Coefficient of Vbgp | 2.7802 | %/V | VDD=2.7V to 3.6, T=27C | ||
| VDD | Supply Voltage | 3.2 | 3.3 | 3.6 | V | T=-40C to 140C |
| IDD | Supply Current | 3.954 | uA | EN=1 | ||
| IDD | Supply Current | 607.836 | nA | EN=0 |
Here are some reference links used to learn to design in open source EDA tools and about bandgap reference circuit design.
- Kunal Ghosh - Co-founder (VSD Corp. Pvt. Ltd)
- Tim Edwards - Senior Vice President of Analog and Design at efabless corporation
- Anmol Purty - VSD Intern
- Sheryl Serrao - VSD Intern