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STMicroelectronics LPS22CHTR
- Part No.:
- LPS22CHTR
- Manufacturer:
- STMicroelectronics
- Category:
- Pressure Sensors, Transducers
- Package:
- 10-WFLGA, Holed
- Datasheet:
-
LPS22CHTR.pdf
- Description:
- CONSUMER MEMS
- Quantity:
- Payment:
- Shipping:
Inventory:5,816
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Product details
Overview
LPS22CHTR from STMicroelectronics is a high-performance MEMS nano barometric pressure sensor delivering 24-bit absolute digital pressure output over 260–1260 hPa, with ±10 Pa relative accuracy, 0.75 Pa RMS noise, and embedded temperature compensation - deployed in portable altimeters, GPS-assisted navigation, and sport watches.
For engineers reviewing the LPS22CHTR datasheet, LPS22CHTR pinout, LPS22CHTR application, or LPS22CHTR equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options for barometric sensing in space-constrained, low-power embedded systems.
Technical Context
The LPS22CHTR integrates a piezoresistive silicon membrane sensing element with a mixed-signal ASIC that performs analog-to-digital conversion, factory calibration, and digital interface control. Its architecture supports independent pressure and temperature measurement paths with shared 24-bit output registers and configurable low-pass filtering.
It operates across 1–200 Hz output data rates (ODR), features an embedded FIFO with three operational modes (bypass, FIFO, continuous stream), and provides interrupt-driven event detection including Data-Ready, FIFO flags, and programmable pressure thresholds via dedicated registers (e.g., THS_P_L/H, INTERRUPT_CFG).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 260–1260 hPa absolute - covers sea-level to ~11 km altitude, enabling full-range altimetry in portable devices. |
| Relative Accuracy | ±10 Pa at 800–1100 hPa and 25 °C - ensures <1 m altitude resolution under typical atmospheric conditions. |
| Pressure Noise | 0.75 Pa RMS - enables stable altitude tracking with minimal jitter in wearable and handheld applications. |
| Supply Current | 4 μA at 1 Hz ODR - supports multi-year battery life in coin-cell-powered IoT sensors and wearables. |
| Output Resolution | 24-bit digital pressure data - delivers 0.005 hPa effective resolution for precision environmental monitoring. |
| Interface Support | SPI (4-/3-wire) and I²C - allows flexible host MCU integration without requiring dedicated timing peripherals. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial and automotive cabin environments without external thermal management. |
| Shock Survivability | 22,000 g - maintains functionality after mechanical shock events common in drop-prone consumer electronics. |
Pinout & Package
HLGA-10L (2.0 × 2.0 × 0.76 mm) is a holed land-grid array package enabling direct external pressure access to the MEMS diaphragm. The cavity beneath the die is open through the package bottom for unobstructed pressure coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Vdd_IO | I/O power supply | Separate 1.7–3.6 V rail for digital interface logic - decoupled from analog VDD to reduce noise coupling into pressure readings. |
| 2 SCL/SPC | I²C clock / SPI clock | Shared pin supporting both protocols - mode selected by CS level; requires external pull-up for I²C operation. |
| 3 Reserved | NC (must tie to GND) | Internally unused terminal - grounding prevents floating node and EMI susceptibility per ST design guidelines. |
| 4 SDA/SDI/SDI-SDO | I²C data / SPI input / bidirectional SPI data | Tri-function pin: open-drain I²C data, unidirectional SDI in 4-wire SPI, or bidirectional SDI/SDO in 3-wire SPI. |
| 5 SDO/SA0 | SPI output / I²C address LSB | Provides device address bit SA0 in I²C mode; outputs pressure/temperature data in SPI read cycles. |
| 6 CS | SPI enable / interface mode select | Low = SPI active; High = I²C active - dual-role control eliminates need for external mode-select logic. |
| 7 INT_DRDY | Interrupt / Data-Ready output | Open-drain signal asserting on new pressure/temperature sample availability or threshold crossing - reduces polling overhead. |
| 8 & 9 GND | Analog/digital ground | Dual ground pins improve return path integrity and minimize ground bounce during SPI/I²C transitions. |
| 10 VDD | Analog core supply | 1.7–3.6 V supply for MEMS sensing element and ADC - must be filtered independently from Vdd_IO for optimal noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded temperature compensation | Factory-calibrated across −40 °C to +85 °C - eliminates need for host-side thermal correction algorithms in altimeter firmware. |
| Configurable FIFO modes | Bypass, FIFO, and Continuous Stream modes - enables burst sampling, latency-controlled streaming, or deterministic data capture without MCU intervention. |
| Programmable pressure thresholds | Two independent high/low thresholds with interrupt generation - supports altitude-triggered actions (e.g., floor-change detection in smartwatches). |
| Low-noise measurement mode | LOW_NOISE_EN = 1 reduces RMS noise to 0.75 Pa - optimized for static pressure monitoring where resolution outweighs update rate. |
| High shock survivability | 22,000 g rating - ensures reliability in portable devices subjected to repeated mechanical impact (e.g., fitness trackers, e-cigarettes). |
Applications
| Portable Altimeters | GPS-Assisted Navigation |
|---|---|
|
Use Scenario: Real-time elevation tracking in hiking watches and drone flight controllers. IC Role / Device Role / Timing Role: Absolute pressure transducer providing calibrated 24-bit output at 25–100 Hz ODR for altitude delta calculation. Use Value: ±10 Pa relative accuracy enables sub-meter vertical resolution, improving GPS vertical fix convergence time by up to 40%. |
Use Scenario: Vertical position refinement in automotive infotainment and smartphone navigation. IC Role / Device Role / Timing Role: Barometric aid to GNSS receivers, supplying atmospheric pressure for tropospheric delay correction. Use Value: 0.75 Pa RMS noise ensures stable pressure trend detection during vehicle motion, reducing altitude drift in tunnels or urban canyons. |
| Sport Watches | e-Cigarette Vapor Detection |
|
Use Scenario: Activity-based altitude logging and ascent/descent rate calculation during cycling or skiing. IC Role / Device Role / Timing Role: Low-power pressure sensor operating at 1–10 Hz ODR with embedded FIFO to buffer samples during Bluetooth transmission gaps. Use Value: 4 μA current draw at 1 Hz extends CR2032 battery life beyond 2 years while maintaining responsive altitude response. |
Use Scenario: Airflow-triggered activation in regulated vaping devices using inhalation detection. IC Role / Device Role / Timing Role: Fast-response pressure switch detecting transient negative pressure pulses (<50 ms duration) during user draw. Use Value: 200 Hz maximum ODR and programmable interrupt thresholds allow reliable puff detection with <10 ms latency and minimal false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar barometric pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BMP388 (Bosch) | Higher ODR (200 Hz), lower noise (0.06 Pa), but no integrated FIFO and larger 2.0 × 2.0 × 0.75 mm LGA package. | Preferred for high-dynamic applications like drone stabilization; lacks FIFO-based burst capture for intermittent telemetry. | Select BMP388 when ultra-low noise dominates over interrupt-driven event handling and memory buffering. |
| MS5637-02BA03 (TE Connectivity) | 16-bit output, ±1.5 hPa absolute accuracy, I²C-only interface, no embedded temperature compensation - requires host-side calibration. | Suitable for cost-sensitive weather stations where long-term stability > resolution; not recommended for portable battery-powered devices. | Choose MS5637 only if system-level calibration infrastructure exists and 24-bit resolution is unnecessary. |
Compared with BMP388 and MS5637-02BA03, the LPS22CHTR uniquely balances ultra-low power (4 μA), on-chip FIFO, and factory-compensated 24-bit output - making it optimal for resource-constrained, interrupt-driven portable sensing where firmware simplicity and battery longevity are critical.
Availability
LPS22CHTR is available at Aetrix Electronics and suitable for portable altimeters, GPS-assisted navigation systems, and sport watch designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LPS22CHTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer markets.
The LPS22CHTR belongs to ST's high-accuracy MEMS pressure sensor product line, engineered specifically for ultra-compact, low-power barometric sensing in battery-operated portable electronics with stringent size and energy constraints.
FAQ
What is the minimum supply voltage required for reliable operation of the LPS22CHTR?
The LPS22CHTR operates reliably from 1.7 V to 3.6 V on both VDD (analog core) and Vdd_IO (digital I/O) rails. Below 1.7 V, internal regulators may fail to stabilize, causing register access errors or invalid pressure readings - ST specifies 1.7 V as the absolute minimum for guaranteed functionality across −40 °C to +85 °C.
How does the embedded FIFO improve system-level power efficiency?
The FIFO allows the host MCU to enter deep-sleep mode while the LPS22CHTR autonomously buffers up to 32 pressure/temperature samples. Upon reaching watermark level or timeout, INT_DRDY asserts - waking the MCU only when data is ready, reducing average current consumption by up to 70% compared to continuous polling at 100 Hz.
Can the LPS22CHTR be used for differential pressure measurement?
No - the LPS22CHTR is an absolute pressure sensor with a single port exposed to ambient atmosphere via the HLGA package cavity. It lacks a second pressure port or internal reference chamber required for differential or gauge measurements; its design purpose is strictly barometric and altimetric applications.
What is the significance of the "holed" HLGA-10L package construction?
The HLGA-10L package features a bottom cavity opening that exposes the MEMS diaphragm directly to ambient air - eliminating encapsulation-induced pressure lag or hysteresis. This mechanical design ensures fast step-response (<10 ms), accurate static pressure capture, and immunity to trapped-air thermal expansion artifacts in sealed enclosures.
LPS22CHTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 10-WFLGA, Holed
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Applications:
- Board Mount
- Pressure Type:
- Absolute
- Operating Pressure:
- 3.77PSI ~ 18.27PSI (26kPa ~ 126kPa)
- Output Type:
- I2C, SPI
- Output:
- 24 b
- Accuracy:
- -
- Voltage - Supply:
- 1.7V ~ 3.6V
- Port Size:
- -
- Port Style:
- No Port
- Features:
- Temperature Compensated
- Termination Style:
- SMD (SMT) Tab
- Maximum Pressure:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HLGA (2x2)
LPS22CHTR FAQ
1.How can I place an order for LPS22CHTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LPS22CHTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LPS22CHTR reliable?
The price and inventory of LPS22CHTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPS22CHTR is usually 5 days.
3.What payment methods are accepted for LPS22CHTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPS22CHTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPS22CHTR?
LPS22CHTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPS22CHTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LPS22CHTR?
For technical support, including LPS22CHTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPS22CHTR requirements.
6.How does Aetrix verify that LPS22CHTR is sourced from the original manufacturer or authorized distributors?
All LPS22CHTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPS22CHTR meets industry standards.
7.What is the process for return or replacement of LPS22CHTR?
All LPS22CHTR units undergo pre-shipment inspection (PSI). If there is an issue with LPS22CHTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LPS22CHTR part is unused and in its original packaging.
Return procedure for LPS22CHTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPS22CHTR Tags
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DPS368XTSA1
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DPS310XTSA1
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LPS22HHTR
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ICP-20100
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ICP-10110
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LPS22DFTR
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LPS22HBTR
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BMP390
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BMP581
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BMP384
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2511020213301
Würth Elektronik
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ILPS22QSTR
STMicroelectronics
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