7 TT GF180mcuD Analog Factory Test
7 : TT GF180mcuD Analog Factory Test
- Author: Sylvain Munaut
- Description: Test structures for GF180mcuD analog support
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
It's a couple of big current mirror loads.
A reference current is input, it's multiplied internally by about 50x and draws from selected power rail.
A few sense wires are routed out allowing to measure both voltage drop of the power rails as well as the voltage raise of the VGND rail.
How to test
Provide a test current to the iref input, then toggle the appropriate enable pin to enable to current mirror load on the power rail to be tested.
External hardware
- Programmable current source
- Precision multimeter
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | ena_vdpwr | ||
| 1 | ena_vapwr | ||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | B14 | 20 | iref |
| 1 | B10 | 16 | vgnd_sense |
| 2 | B15 | 21 | vdpwr_sense |
| 3 | B11 | 17 | vapwr_sense |
| 4 | B12 | 18 | loopback[0] |
| 5 | B13 | 19 | loopback[1] |