Finalized ICs

Barometric Altimeter

Mary

MS560702BA03: 

• I2C and SPI Interface
• 1.8 to 3.6 V Supply Voltage

• 24 bit ΔΣ ADC reading

• 100,000 ft ASL Max
• 20 cm accuracy 
• OSR 256 = .5 ms response time
• Peak Supply Current ~1.4 mA

BMP390: "Secondary"

• 10-pin metal-lid LGA 2.0×2.0×0.75 mm3 package
• relative accuracy; typ. ± 3 Pa, equiv. to ± 0.25 m
• absolute accuracy: typ. ± 50 Pa
• I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
•  1.65 V to 3.6 V
• Different filtering/oversampling settings (see 3.4.4 in data sheet)
• 30 K
• Actual chip is 100 for $2.91

MS560702BA03:

Breakout Board Product Page: Nice chip, no breakout.

Chip Retailer: Digikey

Datasheet: Datasheet

• Breakout Purchased

BMP390:

Breakout Board Product Page: Adafruit

Chip Retailer: Mouser

Datasheet: Datasheet

• Breakout Purchased

ADXL375:

• Both SPI and I2C outputs
• Voltage 2 - 3.6 V
• Max Current ~ 145µA
• Only ±200g
• Max ODR 3,200Hz
• 16-bit output
• 11.45$
• 56 mg res

ADXL375:

Breakout Board Product Page: Adafruit

Chip Retailer: Arrow

Datasheet: Datasheet

• Breakout Purchased

Mary

LSM9DS1:

• Mag, Gyro, Accel, Temp sensor
• ±2g/±4g/±8/±16 g
• ±4/±8/±12/±16 Gauss 
• ±245/±500/±2000 dps
• I2C and SPI
• 1.9 V to 3.6 V
• Max Current ~ 4.6 mA
• Embedded temperature sensor, top operating range -40 ,+185 °F
• At ±16 g - 

LSM9DS1:

Breakout Board Product Page: Adafruit

Chip Retailer: Arrow

Datasheet: Datasheet

Flash Storage

Lewis

W25Q128JVSIQ:

Datasheet: Datasheet

Microcontroller 

Probably any STM32 will do.

• Must have i2C and SPI
• Good amount of I/O 
• Run at 3.3V
• Is in stock somewhere
• We like cool features 

STM32F446RET6:

Chip Retailer: LCSC

DataSheet: Datasheet

LSM6DSL - LGA-14

• Mag, Gyro
• ±2g/±4g/±8/±16 g
• ±125/±245/±500/±1000/±2000 dps
• I2C and SPI
• 1.7 V to 3.6 V
• Max Current ~ 0.65 mA
• Embedded temperature sensor, top operating range -40 ,+185 °F

LSM6DSL:

Breakout Board Product Page: Adafruit

• Includes magnetometer

Chip Retailer: Digi-Key

Datasheet: Datasheet

• Breakout Purchased

Digital output magnetic sensor: ultra-low-power, high-performance 3-axis magnetometer (st.com)

• Breakout Purchased

Temp

SHTC3:

• Temperature Sensing: -40 to 125 ±0.2 C°
• Humidity Sensing: 0 to 100 ±2%RH
• Voltage: 1.62-3.6V
• Max Current ~900µA

TMP117: 

• Planned use on sensor board

SHTC3:

Breakout Board Product Page: Adafruit

Chip Retailer: LCSC

Datasheet: Datasheet

• Breakout Purchased

TMP117:

Breakout Board Product Page: Sparkfun

• Breakout Purchased