2 layers85.7 × 45.6 mm
Power supply
RWTH-ACS/current-voltage-input
Input Stage for three phase voltage and current in the low voltage grid
51 parts2CERN-OHL-W-2.0
2 layers86 × 71 mm
Current voltage input
RWTH-ACS/current-voltage-input2Input Stage for three phase voltage and current in the low voltage grid
- Size
- 86 × 71 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 153
- Nets
- 91
- Pads
- 431
- Tracks, vias
- 1,036, 113
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 8 Jun 2025
- Updated
- 28 Jan 2026
Overview
Current voltage input is an open-source printed circuit board by RWTH-ACS, from the RWTH-ACS/current-voltage-input repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 2-layer board of 86 × 71 mm with 153 parts on 91 nets, routed with 1,036 tracks and 113 vias.
It is built around the AD8421ARZ, AMC1302DWV and M20-7810245. Its parts include 65 capacitors, 57 resistors, 12 ICs, 10 connectors and 1 inductor.
Main components
3
AD8421ARZ
SOIC-8-18V~-2.5V、2.5V~18V -40℃~+85℃ 0.02% 1 10MHz 1V/V~10000V/V 1nA 1pA/℃ 2.3mA 2nA 3.2nV/√Hz@1kHz 35V/us 400nV/℃ 5V~36V 60uV 65mA 700ns 86dB 90dB External resistor gain、Overvoltage protection、Integrated ADC driver SOIC-8 Instrumentation Amplifiers ROHSAnalog DevicesInstrumentation OpAmps
AMC1302DWV
SOIC-8-300mil-40℃~+125℃ 100dB 10nA 36uA 3V~5.5V 50uV 800nV/℃ Signal limiting/constant amplitude output、Input fault detection、Zero drift / auto-zero SOIC-8-300mil Special Purpose Amplifiers ROHSTexas InstrumentsSpecial Purpose Amplifiers
M20-7810245
SMD-4P-40℃~+105℃ 2 2.54mm 2.54mm 2x2P 3.56mm 3A 4P Copper Alloy Gold Square Hole Surface Mount,Vertical Top SMD-4P Female Headers ROHSHarwinFemale Headers
README
README.mdLow Cost Analog Input Stage for PMU Applications in the Low Voltage Grid
The described device provides three 230 V rated voltage inputs and three current inputs for 5 A nominal. Both are isolated and converted to a +-10V output signal. A detailed explanation is given in the following publication: https://ieeexplore.ieee.org/document/11219915
Voltage Channel
Current Channel
Pictures
License
This hardware is licensed unter CERN-OHL-W-2.0 open source license. Please refer to the license file in the LICENSE.
We kindly ask all academic publications employing components of this work to cite the following paper:
- M. Pitz, B. Khan, C. Cazal, M. M. Nowak and A. Monti, "Low Cost Analog Input Stage for PMU Applications in the Low Voltage Grid," 2025 IEEE 15th International Workshop on Applied Measurements for Power Systems (AMPS), Bucharest, Romania, 2025, pp. 1-6, doi: 10.1109/AMPS66841.2025.11219915. keywords: {Temperature measurement;Low voltage;Isolators;Temperature dependence;Current transformers;Current measurement;Phasor measurement units;Hardware;Voltage control;Usability;analog input;pmu;voltage isolator;current isolator},
For other licensing options please consult Prof. Antonello Monti.
Contact
- Manuel Pitz manuel.pitz@eonerc.rwth-aachen.de
- Benish Khan benish.khan@eonerc.rwth-aachen.de
- Cesar Cazal cesar.cazal@eonerc.rwth-aachen.de
- Matthias Marcus Nowak marcus.nowak@rwth-aachen.de
- Leonid Kalinin leonid.kalinin@rwth-aachen.de
Institute for Automation of Complex Power Systems (ACS) EON Energy Research Center (EONERC) RWTH University Aachen, Germany
Acknowledgment
This work has been performed in the framework Target-X, a project funded by the Smart Networks and Services Joint Undertaking (SNS JU) under Horizon Europe. The views expressed are those of the authors and do not necessarily represent the project. The consortium is not liable for any use that may be made of any of the information contained therein.
We are grateful for the financial support of the BMWE (Federal Ministry of Economic Affairs and Energy), funding reference 03El6085.
Parts
153| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | 0 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R10, R15, R16, R18, R19, R20, R22, R23, R24, R29, R30, R35, R36, R37 +14 |
| 24 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C19, C20, C22, C24, C34, C35, C36, C38, C40, C41, C43, C45, C47, C48, C50, C52 +8 |
| 12 | 10n? | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C72, C73, C74, C75, C76, C77, C78, C79, C80, C81, C82, C83 |
| 11 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C26, C29, C31, C37, C39, C58, C60, C65, C67, C70, C71 |
| 11 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C23, C25, C27, C30, C32, C44, C46, C51, C53, C68, C69 |
| 9 | 120k | Resistor_SMD:R_2010_5025Metric_Pad1.40x2.65mm_HandSolder | R11, R12, R13, R25, R26, R27, R31, R32, R33 |
| 6 | 10k | Potentiometer_THT:Potentiometer_Bourns_3296Y_Vertical | RV1, RV3, RV4, RV5, RV6, RV7 |
| 6 | AD8421 | Package_SO:MSOP-8_3x3mm_P0.65mm | U10, U14, U16, U18, U20, U22 |
| 6 | C | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C21, C33, C42, C49, C54, C61 |
| 4 | M20-7810245 | custom:Harwin_M20-7810245_2x02_P2.54mm_Vertical_Larger_Pads | J7, J8, J9, J13 |
| 3 | 1k6 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R49, R50, R51 |
| 3 | 2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14, R28, R34 |
| 3 | 2k4 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R46, R47, R48 |
| 3 | 2k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R52, R53, R54 |
| 3 | 47k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R55, R56, R57 |
| 3 | 5m | custom:PEWF | R1, R17, R21 |
| 3 | AMC1302 | custom:DWV | U9, U15, U17 |
| 3 | AMC1350 | custom:DWV | U13, U19, U21 |
| 3 | Conn_01x02_Socket | custom:PhoenixContact_MSTBVA_2,5_2-G-5,08_1x02_P5.08mm_Vertical_alt | J2, J3, J4 |
| 2 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP1, JP2 |
| 1 | Conn_01x04_Socket | custom:PhoenixContact_MSTBVA_2,5_4-G-5,08_1x04_P5.08mm_Vertical_alt | J5 |
| 1 | Conn_01x05_Socket | custom:PhoenixContact_MSTBVA_2,5_5-G-5,08_1x05_P5.08mm_Vertical_alt | J1 |
| 1 | Conn_01x08_Socket | custom:PhoenixContact_MSTBVA_2,5_8-G-5,08_1x08_P5.08mm_Vertical_alt | J6 |
| 1 | nb | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C28 |
| 1 | nb | Inductor_SMD:L_1206_3216Metric_Pad1.42x1.75mm_HandSolder | L2 |
Questions
How big is the Current voltage input PCB?
It measures 86 × 71 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Current voltage input use?
153 parts, built around the AD8421ARZ, AMC1302DWV and M20-7810245. 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 Current voltage input KiCad files?
From the RWTH-ACS/current-voltage-input repository on GitHub, at the commit this page was made from: the board is analog_channels/current-voltage-input.kicad_pcb and its schematic analog_channels/current-voltage-input.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Current voltage input design in my own project?
Its repository publishes it under the CERN-OHL-W-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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