LPS22HBT | STMicroelectronics | MEMS piezoresistive absolute pressure sensor (digital barometer)

LPS22HBT 

LPS22HBTR 

I. Appearance and packaging

Package: HLGA-10 (10-pin fully molded through-hole LGA)

Size: 2.0 × 2.0 ×0.76 mm, ultra-small chip;Roll-up TR packaging, shipped in trays.

Top surface: square light-sensitive / pressure-sensitive window (microporous, external air pressure enters the MEMS diaphragm), silk-screen code C052; 10 gold-plated square pads at the bottom, arranged in a circle, with no pins protruding.

Package features: full molded structure, all internal bonding wires are protected by molded packaging, only 20μm micro-holes are connected to the outside world, anti-salt fog, reliability is better than traditional cavity LGA, can withstand 2200 kg impact

2. Core electrical performance: STMicroelectronics

form

parameter

Specifications

Pressure range

260-1260 hPa (26-126 kPa, range of atmospheric pressure)

Pressure accuracy

±0.1 hPa

Data output

24-bit pressure, 16-bit on-chip temperature

Output rate ODR

1 Hz ~75 Hz

power supply

1.7-3.6V, compatible with 1.8V / 3.3V systems

electric consumption

Typical operating current 3μA, standby current 1μA, suitable for battery-powered devices

Overvoltage capability

20 times full-scale overload, maximum 2000 kPa

Communication interface

I²C / SPI dual interface

Built-in resources

FIFO data cache, interrupts (data ready, FIFO, pressure threshold)

Operating temperature

-40℃ ~ + 85℃, high precision range 0-65℃

III. Working principle

Using ST VENSENS piezoresistive MEMS process, the silicon suspended diaphragm is deformed by air pressure, and the change of piezoresistive resistance converts the electrical signal; The internal integrated ADC and temperature compensation circuit directly output the calibrated digital pressure and temperature data, and the MCU reads the register data through I2C/SPI, without the need for an external compensation circuit.

IV. Main features and highlights

Ultra-low power consumption: 3μA operating current, friendly to battery products such as watches and bracelets, extending the battery life.

High robustness: 20 times overload, 22000 g impact resistance, easy to damage in drop, vibration environment; Full molded package, anti-salt spray corrosion

Built-in FIFO: Reduces the burden of host reading, suitable for low-frequency wake-up MCU scenarios

Interrupt output: configurable pressure threshold trigger interrupt for altitude change, air pressure alarm

Double interface: I²C is suitable for simple applications, SPI is used for high-speed acquisition

V. Typical application scenarios

Consumer electronics: smart phone, smart watch band, altimeter, indoor auxiliary positioning, weather pressure monitoring

Unmanned Aerial Vehicle: Altitude Measurement

IoT Internet of Things: meteorological nodes, environmental monitoring equipment

Industry: airtight chamber pressure monitoring, simple leak detection

Portable device: motion height recording

For technical and business consulting, please contact: 18277896808