¶ Design Files
- Cadence: sgm52412h8x_model，tb_signal_path / tb_signal_path_618
- Matlab: processData.m
¶ Modulator Parameters
- Structure: MASH 2+2, 17 Level + 9 Level
- Sampling Frequency: 4MHz
- Input/Reference: 400mV(DC)，2.5V
- System Chopping Frequency: 2MHz
¶ OTA Parameter
- Input Buffer: Folded Cascode (72uA×4) + ClassAB (360uA), 3pF Miller Capacitor
- Input Anti-Aliasing-Filter: 50Ω Resistor + 1pF Differential
- Integrator OTA: Telescope (100uA×2), 3.6pF Load Capacitor
¶ Simulation Configuration
- tran: 13.44ms, conservative, transient noise = on, fmin=1, fmax=1G
- analog option: reltol = 1e-5, gmin=1e-15
- APS: 1d7h49m
- Spectre-X: preset=cx, 5h49m58s
Simulation Result
| AD4115 | APS | Spretre-X | |
|---|---|---|---|
| VnRMS | 57.99uV/10 | 3.263uV | 3.350uV |
| ENOB (FS=±10V/2) | 18.40 | 19.23 | 19.19 |
| Simulation Time | 31h49m | 5h49m |
APS Simulation Result
