Tiny Tapeout GF 0.3 · Die T0P3 on wafer.space Run 2
GF R2R DAC
035 · Analog and mixed-signal · 1 × 2 tiles
by Matt Venn · repository @mattvenn
Rendered from the layout at 0.33 µm per pixel. Layers: NwellDiffusionPolysiliconMetal 1Metal 2Metal 3Metal 4Metal 5Top metalPad openings
284 logic cells: too few for density figures, which are given for projects of 1,000 or more.
Every figure here is measured from the public layout, the same way for every design on the chip: see data and method, and how its designs used the process.
8 bit R2R DAC
Source repository Its page on Tiny TapeoutBuy a chip and board
| Size | 347 × 325 µm (0.113 mm²) |
|---|---|
| Macro | tt_um_gf_r2r_dac |
| Files | documentation · licence · layout and netlist in Tiny Tapeout GF 0.3 |
| Tiles | 1 × 2 at column 2, row 11 of the tile grid |
| Mux address | 35 |
| Language | Analog |
| Transistors | 2,970 |
| Logic cells | 284 + 825 filler and tap cells |
| Libraries | 7t-5V (284) |
| SRAM | No SRAM |
Process features
Which parts of the GF180MCU process this design uses: its transistor voltages and where they come from, its gate oxides, and any devices drawn by hand outside the standard cells, SRAM and pads.
| 5 V | 7t-5V standard cells |
|---|---|
| Gate oxides | Thick only (5 V/6 V) in the design itself |
| High-resistance poly resistors | 27 (2,700 µm²) |
Where the area went
How this project's area splits between logic cells, filler and tap cells and other.
- Logic cells 0.01 mm² (7%)
- Filler and tap cells 0.01 mm² (10%)
- Other 0.10 mm² (83%)
Most used cells
The ten standard cells this design uses most.
| Cell | Library | Instances | What it does |
|---|---|---|---|
| dffq_1 | 7t-5V | 36 | D flip-flop (1 bit storage) |
| nor2_1 | 7t-5V | 32 | 2-input NOR gate |
| aoi21_1 | 7t-5V | 22 | AND-OR-Invert compound gate |
| nor3_1 | 7t-5V | 20 | 3-input NOR gate |
| clkinv_1 | 7t-5V | 19 | Clock inverter |
| nand2_1 | 7t-5V | 16 | 2-input NAND gate |
| dlyb_1 | 7t-5V | 15 | Delay buffer |
| xor2_1 | 7t-5V | 14 | 2-input XOR gate |
| aoi22_1 | 7t-5V | 10 | AND-OR-Invert (2x2 inputs) |
| clkbuf_2 | 7t-5V | 10 | Clock buffer (2x drive) |
Tiny Tapeout and wafer.space are independent companies that work together (announcement). Tiny Tapeout runs its own shuttles: it takes the projects, builds the die, and sells and supports the chips and boards. wafer.space has the dies manufactured on its GF180MCU runs, and these pages are wafer.space's measurements of them. For anything about a Tiny Tapeout project, chip or order, contact Tiny Tapeout.