1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 A B C D E F A B C D E F Date: KiCad E.D.A. 10.0.3 Rev: Size: A3 Id: 1/1 Title: File: 4-channel-ct.kicad_sch Sheet: / C202 0.1μF C205 10pF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 J1002 C206 10pF AVDD 1 AGND 2 I1P 3 I1N 4 I2P 5 I2N 6 I3P 7 I3N 8 IC 9 VREF 11 V1P 13 V1N 14 V2P 15 V2N 16 V3P 17 V3N 18 DGND 19 OSCI 20 OSCO 21 ZX0 22 ZX1 23 ZX2 24 CF1 25 CF2 26 CF3 27 CF4 28 WARNOUT 29 IRQ0 30 IRQ1 31 TEST 32 PM0 33 PM1 34 CS 37 SCLK 38 SDO 39 SDI 40 RESET 41 VDD18 42 DVDD 48 U2 ATM90E32AS-AU-R GND C201 0.1μF GND +3V3 C203 1μF Y2 16.384 MHZ GND FB2 FerriteBead GND_A R4-3 1kΩ GND_A GND_A GND 1 2 J4 CT 4 GND_A C208 0.1μF GND_A R5-3 1kΩ 1 2 J5 CT 5 C5-1 18nF GND_A C4-3 33nF C4-2 18nF C4-1 18nF GND_A R4-2 1kΩ R4-1 50Ω R7 10Ω 33Ω 33Ω 33Ω C5 10nF R6 1kΩ GND_A GND R3 1kΩ GND C7 1nF 6VAC_L R1 5.1kΩ +3V3 +3V3_A1 U RV1 10D431K +3V3 C1 0.1μF GND_A R6-2 1kΩ 1 2 J101 Mains 1 2 J6 CT 6 R6-1 50Ω GND_A GND_A C6-3 33nF C6-1 18nF R6-3 1kΩ C6-2 18nF F1 500mA C204 10nF GND C101 0.1μF GND_A R1-3 1kΩ 1 2 J3 CT 3 R1-1 25Ω GND_A R1-2 1kΩ GND_A C1-1 18nF C1-3 33nF C1-2 18nF GND_A R3-3 1kΩ GND_A R3-1 50Ω +3V3 C2-2 18nF GND GND R101 10kΩ C108 0.1μF C107 0.1μF AVDD 1 AGND 2 I1P 3 I1N 4 I2P 5 I2N 6 I3P 7 I3N 8 IC 9 VREF 11 V1P 13 V1N 14 V2P 15 V2N 16 V3P 17 V3N 18 DGND 19 OSCI 20 OSCO 21 ZX0 22 ZX1 23 ZX2 24 CF1 25 CF2 26 CF3 27 CF4 28 WARNOUT 29 IRQ0 30 IRQ1 31 TEST 32 PM0 33 PM1 34 CS 37 SCLK 38 SDO 39 SDI 40 RESET 41 VDD18 42 DVDD 48 U1 ATM90E32AS-AU-R 33Ω C104 10nF C105 10pF C103 1μF Y1 16.384 MHZ GND FB1 FerriteBead C102 0.1μF GND_A R3-2 1kΩ 33Ω GND +3V3 R201 10kΩ +3V3 C207 0.1μF R5-1 50Ω C5-3 33nF C5-2 18nF GND_A R5-2 1kΩ GND_A +3V3 GND_A C3-2 18nF L1 4.7μH C106 10pF GND C3-1 18nF C3-3 33nF 1 2 J1 CT 1 1 2 J2 CT 2 R2-1 50Ω R2-2 1kΩ GND R2-3 1kΩ GND_A C2-1 18nF C2-3 33nF GND_A C6 1nF 33Ω GND C2 100μF 6VAC_N R4 5.1kΩ GND C1001 100μF R5 5.1kΩ 6VAC_L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 +3V3 C4 22μF GND 3V3 J1_1 RST J1_3 GPIO4 J1_4 GPIO5 J1_5 GPIO6 J1_6 GPIO7 J1_7 GPIO15 J1_8 GPIO16 J1_9 GPIO17 J1_10 GPIO18 J1_11 GPIO8 J1_12 GPIO3 J1_13 GPIO46 J1_14 GPIO9 J1_15 GPIO10 J1_16 GPIO11 J1_17 GPIO12 J1_18 GPIO13 J1_19 GPIO14 J1_20 5V0 J1_21 GND J1_22 U0TXD/GPIO43 J3_2 U0RXD/GPIO44 J3_3 GPIO1 J3_4 GPIO2 J3_5 MTMS/GPIO42 J3_6 MTDI/GPIO41 J3_7 MTDO/GPIO40 J3_8 MTCK/GPIO39 J3_9 GPIO38 J3_10 GPIO37 J3_11 GPIO36 J3_12 GPIO35 J3_13 GPIO0 J3_14 GPIO45 J3_15 GPIO48 J3_16 GPIO47 J3_17 GPIO21 J3_18 USB_D+/GPIO20 J3_19 USB_D-/GPIO19 J3_20 U3 ESP32-S3-DEVKITC-1-N16R8V AC/L 1 AC/N 2 -Vout 3 +Vout 4 U4 HLK-5M03 6VAC_N +3V3_A2 +3V3_A1 +3V3_A2 C1003 0.1μF +3V3 GND_A GND C1002 47μF 1 2 3 4 T1 Voltage Sensor Transformer GND_A C3 0.1μF R2 5.1kΩ AC_P CT4-N CT3-P L9 R10 R12 SCLK L19 R14 R5 L13 CT2-P R4 CT2-N L4 L21 L18 L17 R13 L20 L5 L8 L3 L7 CT3-N L6 L4 R11 R4 SDI SCLK SDO CS2 CT3-N CT6-P CT2-N R5 CT1-P CT2-P AC_P CT3-P CT5-N CT5-P R3 R2 CT1-N AC_N CT6-N CT6-P AC_N CT6-N L21 CS1 CS2 L3 SDI SCLK AC_N CT5-P CT5-N CT4-N CT4-P CT4-P AC_P AC_P AC_N AC_P AC_P AC_N AC_N AC_P R19 R6 L17 R17 R15 R14 R16 R20 R5 R19 L15 L5 L6 L12 SDO L18 R7 L19 R4 R11 R12 R7 R10 R8 R6 R9 R7 L7 R20 R13 R18 R9 R15 L16 R19 L10 L12 L13 CT1-P CT1-N L15 L11 L14 AC_N R17 R18 L9 SDI L14 SDO R16 L16 L11 L10 R2 R3 L20 R6 CS1 R8 L8 C1003 0.1μF C1001 100μF +3V3 GND U3 ESP32-S3-DEVKITC-1-N16R8V 3V3 J1_1 RST J1_3 GPIO4 J1_4 GPIO5 J1_5 GPIO6 J1_6 GPIO7 J1_7 GPIO15 J1_8 GPIO16 J1_9 GPIO17 J1_10 GPIO18 J1_11 GPIO8 J1_12 GPIO3 J1_13 GPIO46 J1_14 GPIO9 J1_15 GPIO10 J1_16 GPIO11 J1_17 GPIO12 J1_18 GPIO13 J1_19 GPIO14 J1_20 5V0 J1_21 GND J1_22 U0TXD/GPIO43 J3_2 U0RXD/GPIO44 J3_3 GPIO1 J3_4 GPIO2 J3_5 MTMS/GPIO42 J3_6 MTDI/GPIO41 J3_7 MTDO/GPIO40 J3_8 MTCK/GPIO39 J3_9 GPIO38 J3_10 GPIO37 J3_11 GPIO36 J3_12 GPIO35 J3_13 GPIO0 J3_14 GPIO45 J3_15 GPIO48 J3_16 GPIO47 J3_17 GPIO21 J3_18 USB_D+/GPIO20 J3_19 USB_D-/GPIO19 J3_20 33Ω 33Ω R6-2 1kΩ R6-1 50Ω GND_A C6-3 33nF C6-1 18nF R6-3 1kΩ C6-2 18nF C206 10pF U2 ATM90E32AS-AU-R AVDD 1 AGND 2 I1P 3 I1N 4 I2P 5 I2N 6 I3P 7 I3N 8 IC 9 VREF 11 V1P 13 V1N 14 V2P 15 V2N 16 V3P 17 V3N 18 DGND 19 OSCI 20 OSCO 21 ZX0 22 ZX1 23 ZX2 24 CF1 25 CF2 26 CF3 27 CF4 28 WARNOUT 29 IRQ0 30 IRQ1 31 TEST 32 PM0 33 PM1 34 CS 37 SCLK 38 SDO 39 SDI 40 RESET 41 VDD18 42 DVDD 48 C201 0.1μF +3V3 R4-3 1kΩ R5-3 1kΩ C5-1 18nF GND_A C4-3 33nF C4-2 18nF C4-1 18nF R4-2 1kΩ R4-1 50Ω 33Ω GND C207 0.1μF R5-1 50Ω C5-3 33nF C5-2 18nF R5-2 1kΩ GND_A C106 10pF R2-1 50Ω R2-3 1kΩ C2-1 18nF C2-3 33nF R1-3 1kΩ R1-1 25Ω GND_A R1-2 1kΩ C1-1 18nF C1-3 33nF C1-2 18nF GND C107 0.1μF U1 ATM90E32AS-AU-R AVDD 1 AGND 2 I1P 3 I1N 4 I2P 5 I2N 6 I3P 7 I3N 8 IC 9 VREF 11 V1P 13 V1N 14 V2P 15 V2N 16 V3P 17 V3N 18 DGND 19 OSCI 20 OSCO 21 ZX0 22 ZX1 23 ZX2 24 CF1 25 CF2 26 CF3 27 CF4 28 WARNOUT 29 IRQ0 30 IRQ1 31 TEST 32 PM0 33 PM1 34 CS 37 SCLK 38 SDO 39 SDI 40 RESET 41 VDD18 42 DVDD 48 33Ω GND_A FB1 FerriteBead C108 0.1μF C101 0.1μF +3V3 R3-1 50Ω R3-3 1kΩ C2-2 18nF GND_A R2-2 1kΩ C3-3 33nF C3-1 18nF R3-2 1kΩ C3-2 18nF GND_A C208 0.1μF GND_A FB2 FerriteBead F1 500mA C1 0.1μF R7 10Ω RV1 10D431K R3 1kΩ R6 1kΩ R5 5.1kΩ 6VAC_L R2 5.1kΩ T1 Voltage Sensor Transformer 1 2 3 4 6VAC_N C4 22μF C3 0.1μF L1 4.7μH