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Std Edition6 channel Isolated Meter

Profile:RP2040 based isolated ADC module with input banana jacks

License: CERN Open Hardware License

Published Time:2022-02-20 08:34:22
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Description

Isolated channels of low voltage and current meter for independent and universal measurement system based on Raspberry Pico.

 

For voltage there is autoranging using the internal PGA with 1x to 8x gain. Input impedance is for now 160 kOhm with highest input voltage of around 32 V. Current input uses shunt resistor on board, optimal voltage drop for full scale on 8x gain is 0.25 V. 0.1 Ohm shunt means -2.5 to +2.5 A range .

Documents

PCB_6-8ch Isolated Meter

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PCB_6-8ch Isolated Meter 4l

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ID Name Designator Footprint Quantity
1 10uF C1,C2,C23 CAP-SMD_L3.2-W1.6-R-RD 3
2 100nF C3,C4,C11,C12,C13,C14,C15,C16,C17,C18,C19,C20,C21,C22,C24,C25 C0603 16
3 1uF C5,C6 C0805 2
4 10uF C7,C8 C0805 2
5 27pF C9,C10 C0603 2
6 1N5819WS D1,D2 SOD-323_L1.8-W1.3-LS2.5-RD 2
7 SMBJ33CA-C78420 D3 SMB_L4.6-W3.6-LS5.3-BI 1
8 SMBJ5.0A_C10204 D4 SMB_L4.6-W3.6-LS5.3-R-RD 1
9 M7_C95872 D7,D8,D9 DO-214AC_L4.3-W2.7-LS5.3-RD 3
10 nSMD005 F1 F1206 1
11 Header-Male-2.54_1x3 H1 HDR-TH_3P-P2.54-V-M-1 1
12 Header-Male-2.54_1x4 H2 HDR-TH_4P-P2.54-V-M 1
13 HDR-M-2.54_1x1 J1,J2 HDR-M-2.54_1X1 2
14 19-217/GHC-YR1S2/3T LED1,LED2,LED3,LED4 LED0603-R-RD 4
15 0.05Ω R1,R13 R2728 2
16 27.4Ω R2,R3 R0603 2
17 1kΩ R4,R5,R8,R9,R14,R17,R18,R19,R20 R0603 9
18 5.1kΩ R6,R7,R11,R12 R0603 4
19 10kΩ R10,R16 R0603 2
20 150kΩ R15 R0805 1
21 JUMPER-PAD-2-NOYES_SILK SJ1,SJ2,SJ3 PAD-JUMPER-2-NO_YES_SILK 3
22 TS-1187A-B-A-B SW1,SW2 SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL-2 2
23 SRV05-4-P-T7 TV1 SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR 1
24 RP2040 U1 LQFN-56_L7.0-W7.0-P0.4-EP 1
25 P25Q16H-SSH-IT U2 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 1
26 MCP3421A0T-E/CH U3 SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR 1
27 π122U31 U4 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 1
28 W25Q16JVSSIQ U5 SOIC-8_L5.3-W5.3-P1.27-LS8.0-BL 1
29 B0505S-1WR3 U6 PWRM-TH_B0503S-1WR2 1
30 HT7533-1_C14289 U7 SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR 1
31 Electrical Lead Connector U8,U9 ELECTRICAL LEAD CONNECTOR 2
32 128x32 OLED U10 128X32 OLED 1
33 π122M31 U11 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 1
34 USB3.1C16PFSMT USBC1 USB-C-SMD_TYPE-C-USB-17 1
35 12MHz X1 OSC-SMD_4P-L3.2-W2.5-BL 1

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