DAC part number stuff

This commit is contained in:
Triss 2022-02-28 04:20:34 +01:00
parent 1fee45eb99
commit 068e9532b6
1 changed files with 2 additions and 2 deletions

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@ -47,7 +47,7 @@ be found on the PCB silkscreen.
| GLITCH SIG | GP11 | DUT glitch (voltage supply) output, from U400. |
| CB1 (Q300) | GP12 | Crowbar gate 1 |
| CB2 (Q301) | GP13 | Crowbar gate 2 |
| DAC nLATCH | GP17 | `nLATCH` signal of the MCP4802 DAC (U401). |
| DAC nLATCH | GP17 | `nLATCH` signal of the DAC (U401). |
| DAC CLK | GP18 | SPI clock signal of U401.
| DAC TX | GP19 | SPI controller-to-device data signal of U401. |
@ -96,7 +96,7 @@ The DAC can be used for the level shifter, crowbar glitcher and SPDT glitcher
| Ref | Quantity | Product | Footprint | Description | Notes |
|:---- | --------:|:-------------- |:----------- |:----------- |:----- |
| U401 | 1 | MCP4802 | SOIC-8 3.9x4.9 (U401a) -OR- MSOP-8 3x3mm P0.65mm (U401b) | 2-channel 8-bit DAC, SPI interface. | DAC, optional. If not placed, you probably want to short JP500, and short the two leads as indicated on the silkscreen. SOIC and MSOP both work. |
| U401 | 1 | MCP4802 | SOIC-8 3.9x4.9 (U401a) -OR- MSOP-8 3x3mm P0.65mm (U401b) | 2-channel 8-bit DAC, SPI interface. | DAC, optional. If not placed, you probably want to short JP500, and short the two leads as indicated on the silkscreen. SOIC and MSOP both work. MCP4812 or MCP4822 can be used, too. |
| R500, R501 | 2 | 220k | 0805 | Generic resistor | Voltage divider for max voltage sensing of U401. Only needed if you place the DAC (U401). |
| C401 | 1 | 10 nF | 0805 | Unpolarized (MLCC) capacitor | Decoupling capacitor for U401. Optional. |