2 layers49.5 × 42.5 mm
Hp ref
cellularmitosis/hp-03458-66509-clone
A clone of the LTZ1000 reference board from the HP 3458A 8.5-digit multimeter
46 parts12MIT
2 layers50 × 40 mm
LTZ1000 Board
NNNILabs/LTZ1000-Reference-Board1Bare-bones LTZ1000 carrier PCB
- Size
- 50 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 14
- Pads
- 85
- Tracks, vias
- 276, 11
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 11 Dec 2021
- Updated
- 30 Dec 2021
Overview
LTZ1000 Board is an open-source printed circuit board by NNNILabs, from the NNNILabs/LTZ1000-Reference-Board repository on GitHub. It is a 2-layer board of 50 × 40 mm with 21 parts on 14 nets, routed with 276 tracks and 11 vias.
It is built around the LT1013DD. Its parts include 8 resistors, 3 capacitors, 2 ICs, 2 diodes and 1 transistor.
Main components
1README
README.mdLTZ1000-Reference-Board
Bare-bones LTZ1000 carrier PCB
In my experience, I've found that some things work best when you just leave them alone. I guess the same thing applies for precision voltage references - the less you bother them, the better. Just let them do their thing. This board was designed in that spirit - no weird thermal cutouts, no bizzaire crop circles (okay, maybe just one).
The overall form factor and layout of this board was inspired by the reference board from the HP3458A 8.5 digit multimeter, while the (3D-printed) plastic cap comes from both the 3458A and Keithely 2002 8.5 digit multimeter. If it was good enough for them, it's good enough for me.
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3mm_Pad_Via | H1, H2, H3, H4 |
| 2 | 4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2 |
| 1 | 100nF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C1 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 10nF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C2 |
| 1 | 120P | Resistor_THT:R_Box_L8.4mm_W2.5mm_P5.08mm | R8 |
| 1 | 13KP | Resistor_THT:R_Box_L8.4mm_W2.5mm_P5.08mm | R6 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 1KP | Resistor_THT:R_Box_L8.4mm_W2.5mm_P5.08mm | R7 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 22nF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C3 |
| 1 | 5551 | Package_TO_SOT_THT:TO-92 | Q1 |
| 1 | 70KP | Resistor_THT:R_Box_L8.4mm_W2.5mm_P5.08mm | R9 |
| 1 | 75KP | Resistor_THT:R_Box_L8.4mm_W2.5mm_P5.08mm | R3 |
| 1 | IO | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | LT1013 | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | LTZ | Package_TO_SOT_THT:TO-99-8 | U2 |
Questions
How big is the LTZ1000 Board PCB?
It measures 50 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LTZ1000 Board use?
21 parts, built around the LT1013DD. 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 LTZ1000 Board KiCad files?
From the NNNILabs/LTZ1000-Reference-Board repository on GitHub, at the commit this page was made from: the board is PCB4 TH/LTZ1000 Board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the LTZ1000 Board design in my own project?
Its repository states no licence, so its author keeps all rights: ask NNNILabs before reusing the design.
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