DigitalWaters_WD_prototype
atop8918
Simplified Schematic for prototype release
Components (45)
| Reference | Value | Description |
|---|---|---|
| U1 | MCP3208 | A/D Converter, 12-Bit, 8-Channel, SPI Interface , 2.7V-5.5V |
| U2 | M24C02-FMN | 2Kb (256x8) I2C Serial EEPROM, 1.6-5.5V, SOIC-8 |
| U3,U9 | ESDA5V3SC5 | Quad TVS Diode Array, 5.3V Standoff, 4 Channels, 400W, ±30kV, SOT-23-5 Keywords: usb esd protection suppression transient |
| U4,U5,U11 | OPA2397DGKR | Precision, Low-Offset-Voltage, Low-Noise, Low-Input-Bias-Current, Rail-to-Rail I/O, e-trim™ Operational Amplifiers |
| U6 | TPS22929D | High side, power distribution switch, 1.4V-5.5V, 1.8A, SOT23-6 package |
| U7 | REF3040 | 4.096V 50-ppm/°C Max, 50-μA, CMOS Voltage Reference, SOT-23-3 |
| U8 | REF3025 | 2.500V 50-ppm/°C Max, 50-μA, CMOS Voltage Reference, SOT-23-3 |
| U13 | TLV4387 | High Precision, Zero-Drift, Low-Input-Bias-Current Op Amps |
| U17 | DHT20 | |
| C1-C3,C5,C23-C25 | 800n | Unpolarized capacitor |
| C4,C6,C13,C32,C46,C58,C87,C92,C93 | 0.1u | Unpolarized capacitor |
| C7,C8,C12,C18,C20,C26-C28,C31,C33,C35,C48,C88,C91,C95 | 1u | Unpolarized capacitor |
| C16,C17,C19,C21,C22,C29,C34 | 10u | Unpolarized capacitor |
| J1 | pH_IN | coaxial connector (BNC, SMA, SMB, SMC, Cinch/RCA, LEMO, ...) |
| J2 | PT-100_TEMP_IN | coaxial connector (BNC, SMA, SMB, SMC, Cinch/RCA, LEMO, ...) |
| J3 | ORP_In | coaxial connector (BNC, SMA, SMB, SMC, Cinch/RCA, LEMO, ...) |
| J4 | Turbidity TSW-10 | Generic connector, single row, 01x03, script generated |
| J5 | SPARE | Generic connector, single row, 01x02, script generated |
| J8 | SHARED | Generic connector, double row, 02x07, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J9 | RPi_Only | Generic connector, double row, 02x07, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J10 | ESP_Only | Generic connector, double row, 02x03, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J11 | ESP32 [R] | Generic connector, single row, 01x20, script generated |
| J12 | SPI_EXPANSION | Generic connector, double row, 02x02, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J13 | I2C_EXPANSION | Generic connector, double row, 02x02, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J14 | Calibration_In | Generic connector, single row, 01x02, script generated |
| J16 | ESP32 [L] | Generic connector, single row, 01x20, script generated |
| J17 | Atlas Surveyor | Generic connector, single row, 01x03, script generated |
| J18 | EZO Carrier Board | Generic connector, single row, 01x05, script generated |
| J24 | RPi Zero 2 W | Generic connector, double row, 02x20, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| R1,R8,R19,R20,R24,R26,R50-R52 | 1k | Resistor |
| R3,R9,R11,R21 | 100k | Resistor |
| R4 | 0 Ohm | Resistor |
| R6 | 990 | Resistor |
| R7,R47 | 10 | Resistor |
| R10,R38,R39,R42,R46 | 10k | Resistor |
| R12 | 5k | Resistor |
| R17 | 3.3k | Resistor |
| R18 | 470 | Resistor |
| R22 | 4.7k | Resistor |
| R25 | 114k | Resistor |
| R48,R49 | 200 | Resistor |
| RN1 | 1k / 0.1% | 4 resistor network, parallel topology |
| TP2 | +2.5V_REF | test point |
| TP3 | VSW | test point |
| TP5 | +4.096V_REF | test point |