SOT23-6 adapter / breakdown board
SOT23-6 adapter / breakdown boardLicense: CC-BY 4.0
The schematics are based on the AN0002: Hardware Design Considerations standard decoupling. No advanced AVDD filtering applied. This board was designed without analog signal separated from digital part. So the analog part of this board might be noisy. I don't have analog parts in my project so this wasn't considered.
Vin goes through onboard optional LDO. Vcc are LDO output / directly applied to MCU.
Optional LDO (U3) are MIC5219-3.3BM5.
X1 are high freq oscillator. X2 are optional low freq oscillator.
C1,C2,CVDD,CAVDD,CIOVDD: 10uF, 0603
CVDD: 1uF, 0603
CVDD1,CIOVDD_0,CIOVDD_3,CIOVDD_5: 0.1uF, 0603
CAVDD_0,CAVDD_1: 10nF, 0603
C3,C4: 22pF, 0603
C4,C5: 33pF, 0603
C7: 470pF, 0402 (LCSC: C117605)
R1: 470 Ohm, 0402
R2,R3,R4,R5: 0 Ohm (can be soldered), 0402
R6: 10K Ohm, 0201
LED1: 0603 LED
X1: Quartz up to 32MHz HC49S (LCSC: C24625)
X2: Quartz 32kHz 2-SMD (LCSC: C182057)
This board does not includes any sort of voltage regulator. Make sure to supply correct Vcc (1.9 to 3.6 V) for this board. Connecting directly to 5V MCU (like Arduino without 3.3 V voltage regulators) will burn this sensor. This is a minimal circuit from "Typical Application Circuit" section from the datasheet.
R1-R2: Resistor, 10 k, ±5%, 1/16 W, 0603
C1: Capacitor, 0.1 μF, 16 V, X7R, 0603
U1: Si705x/702x/7006 sensor, DFN6.
Tested to work with Si7051 high accuracy temperature sensor, reading data with Arduino.License: CC-BY-SA 3.0