2 layers65 × 56 mm
2 layers15.2 × 25.4 mm
XTB
maholli/XTB3xlab.stanford.edu Tester Board
- Size
- 15.2 × 25.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 48
- Pads
- 152
- Tracks, vias
- 156, 16
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 May 2018
- Updated
- 10 Jul 2019
Overview
XTB is an open-source printed circuit board by maholli, from the maholli/XTB repository on GitHub. It is a 2-layer board of 15.2 × 25.4 mm with 23 parts on 48 nets, routed with 156 tracks and 16 vias.
It is built around the EXB-28VR000X. Its parts include 9 resistors, 5 capacitors, 4 ICs and 4 connectors.
Main components
1README
board/XTB-40/readme.mdXTB-40
circa April 2019
❗ Analog power supply is set with resistor located below C1/C4.
- Place a 0ohm resistor above "AVDD" to supply your own analog power on AVDD and GND pins (AS PICTURED). Default AVDD external reference is 5V (TI LM4120). Must supply 5.5V or more to AVDD when using this voltage reference.
- Place a 0ohm resistor above "3.3V" to use the on-board AVDD (NOT SHOWN)
3.3V AVDD is convienent, but limits voltage reference to the internal 2.5V reference. The external reference allows for 5V (pre-installed) voltage reference and has low temperature drift.
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 0 | Resistor_SMD:R_0402_1005Metric | R5, R7, R8, R9 |
| 4 | 47 | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4 |
| 2 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C6 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C1, C3 |
| 2 | Conn_01x01 | custom-footprints:PinHeader_CUSTOM2 | J3, J4 |
| 2 | Conn_01x09 | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J1, J2 |
| 1 | 0.33uF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 10K | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | EXB-28VR000X | custom-footprints:C_ARRAY_EXB28V | RA2 |
| 1 | LM4120-1P8DBV | custom-footprints:LM4120IM5X-1.8&slash_NOPB | U1 |
| 1 | M-QFN28_B | custom-footprints:HVQFN_C | U2 |
| 1 | Value | custom-footprints:ADS124S08_QFP | U4 |
| 1 | Value | custom-footprints:ADS124208_withpad | U5 |
Questions
How big is the XTB PCB?
It measures 15.2 × 25.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the XTB use?
23 parts, built around the EXB-28VR000X. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the XTB KiCad files?
From the maholli/XTB repository on GitHub, at the commit this page was made from: the board is board/XTB-40/XTB.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the XTB design in my own project?
Its repository states no licence, so its author keeps all rights: ask maholli before reusing the design.
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