Overview
The AIS2IHTR, produced by STMicroelectronics, is an ultra-low-power three-axis linear accelerometer designed to address non-safety automotive applications. It leverages robust and mature manufacturing processes for micromachined accelerometers. The device is capable of measuring accelerations with user-selectable full scales of ±2g, ±4g, ±8g, and ±16g, and offers output data rates ranging from 1.6 Hz to 1600 Hz. It features an integrated 32-level FIFO buffer to store data, reducing the need for frequent host processor intervention. The AIS2IHTR can switch between ultra-low-power and high-performance modes dynamically, ensuring broad flexibility for various applications. It also includes embedded self-test capabilities and a dedicated internal engine for motion and acceleration detection, including free-fall, wakeup, tap recognition, and activity/inactivity detection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 1.62 to 3.6 | V |
| Operating Temperature Range | -40 to +115 | °C |
| Full Scales | ±2g, ±4g, ±8g, ±16g | - |
| Output Data Rates | 1.6 Hz to 1600 Hz | - |
| Power Consumption (High-Performance Mode) | 110 µA @ 3 V | - |
| Power Consumption (Low-Power Mode @ 1.6 Hz) | 0.67 µA @ 3 V | - |
| Noise Density (High-Performance Mode) | Down to 90 µg/√(Hz) | - |
| Interface | High-speed I²C/SPI | - |
| FIFO Buffer | 32-level | - |
| Interrupts | 2 independent programmable interrupts | - |
| Shock Survivability | 10000 g | - |
| Package | LGA 12L 2.0x2.0x1 mm | - |
Key Features
- AEC-Q100 qualified
- Dynamically selectable full scales: ±2g, ±4g, ±8g, ±16g
- Low power consumption: down to 110 µA in high-performance mode and 0.67 µA @ 1.6 Hz in low-power mode
- Very low noise: down to 90 µg/√(Hz) in high-performance mode
- Multiple operating modes with multiple bandwidths and resolution
- Single data conversion on demand
- High-speed I²C/SPI digital output interface
- 32-level FIFO buffer
- 2 independent programmable interrupts
- Extended temperature range: -40 °C to +115 °C
- Independent IO supply
- Embedded temperature sensor
- Self-test capability
- 10000 g high shock survivability
- ECOPACK, RoHS, and “Green” compliant
Applications
- Automotive: non-safety applications such as tilt/inclination measurement, telematics, black boxes, in-dash car navigation, anti-theft devices
- Communications equipment, computers, and peripherals
- Industrial applications: motion-activated functions, impact recognition and logging, smart power saving
Q & A
- What is the AIS2IHTR used for?
The AIS2IHTR is an ultra-low-power three-axis linear accelerometer used in non-safety automotive applications, as well as in communications equipment, computers, and industrial settings.
- What are the selectable full scales of the AIS2IHTR?
The AIS2IHTR has dynamically selectable full scales of ±2g, ±4g, ±8g, and ±16g.
- What are the power consumption levels of the AIS2IHTR?
The device consumes down to 110 µA in high-performance mode and 0.67 µA @ 1.6 Hz in low-power mode.
- What is the noise density of the AIS2IHTR in high-performance mode?
The noise density is down to 90 µg/√(Hz) in high-performance mode.
- What interfaces does the AIS2IHTR support?
The AIS2IHTR supports high-speed I²C and SPI digital output interfaces.
- What is the FIFO buffer capacity of the AIS2IHTR?
The AIS2IHTR has a 32-level FIFO buffer.
- How many programmable interrupts does the AIS2IHTR have?
The AIS2IHTR has 2 independent programmable interrupts.
- What is the operating temperature range of the AIS2IHTR?
The device operates over an extended temperature range from -40 °C to +115 °C.
- Is the AIS2IHTR compliant with environmental standards?
Yes, the AIS2IHTR is ECOPACK, RoHS, and “Green” compliant.
- What is the shock survivability of the AIS2IHTR?
The AIS2IHTR has a high shock survivability of 10000 g.
