LIS2DW12

Part: LIS2DW12 — STMicroelectronics

Type: MEMS Digital Output Motion Sensor: High-Performance Ultralow-Power 3-Axis "Femto" Accelerometer

Description: The LIS2DW12 is an ultralow-power high-performance 3-axis linear accelerometer with user-selectable full scales of ±2 g /±4 g /±8 g /±16 g, output data rates from 1.6 Hz to 1600 Hz, and very low noise down to 1.3 m g RMS.

Operating Conditions:

• Supply voltage: 1.62 V to 3.6 V
• Operating temperature: -40 to +85 °C
• Output data rates: 1.6 Hz to 1600 Hz

Absolute Maximum Ratings:

• Max supply voltage: 4.8 V
• Max I/O pins supply voltage: 4.8 V
• Max input voltage on any control pin: -0.3 to Vdd_IO +0.3 V
• Max operating temperature: +85 °C
• Max storage temperature: +125 °C

Key Specs:

• Full scale measurement range: ±2 g /±4 g /±8 g /±16 g
• Sensitivity (@FS±2 g, high-performance mode): 0.244 m g /digit
• Noise density (high-performance mode, @FS±2 g): 90 μ g /√Hz
• RMS noise (low-power mode 4, @FS±2 g): 1.3 m g (RMS)
• Zero-g level offset accuracy: ±20 m g
• Supply current (high-performance mode, 12.5 Hz - 1600 Hz): 90 μA
• Supply current (low-power mode, ODR 1.6 Hz): 0.38 μA
• Supply current (power-down): 50 nA
• SPI clock frequency: up to 10 MHz
• I²C clock frequency: up to 400 kHz (Fast mode), up to 3.4 MHz (High-speed mode)

Features:

• Ultralow power consumption: 50 nA in power-down mode, below 1 μA in active low-power mode
• Very low noise: down to 1.3 m g RMS
• Multiple operating modes with multiple bandwidths
• Android stationary detection, motion detection
• Independent I/O supply
• High-speed I²C/SPI digital output interface
• Single data conversion on demand
• 16-bit data output
• Embedded temperature sensor
• Self-test
• 32-level FIFO
• 10000 g high shock survivability

Applications:

• Motion detection for wearables
• Gesture recognition and gaming
• Motion-activated functions and user interfaces
• Display orientation
• Tap/double-tap recognition
• Free-fall detection
• Smart power saving for handheld devices
• Hearing aids
• Portable healthcare devices
• Wireless sensor nodes
• Motion-enabled metering devices

Package:

• LGA-12

• Ultralow power consumption: 50 nA in power-down mode, below 1 μA in active low-power mode
• Very low noise: down to 1.3 m g RMS in low-power mode
• Multiple operating modes with multiple bandwidths
• Android stationary detection, motion detection
• Supply voltage, 1.62 V to 3.6 V
• Independent I/O supply

·

±2

g

/±4

g

/±8

g

/±16

g

full scale

• High-speed I²C/SPI digital output interface
• Single data conversion on demand
• 16-bit data output
• Embedded temperature sensor
• Self-test
• 32-level FIFO
• 10000 g high shock survivability
• ECOPACK and RoHS compliant

• Motion detection for wearables
• Gesture recognition and gaming
• Motion-activated functions and user interfaces
• Display orientation
• Tap/double-tap recognition
• Free-fall detection
• Smart power saving for handheld devices
• Hearing aids
• Portable healthcare devices
• Wireless sensor nodes
• Motion-enabled metering devices

Figure 2. Pin connections

Figure 2. Pin connections

Table 1. Pin description

Table 2. Internal pull-up values (typ.) for SDO/SA0 and CS pins

Table 2. Internal pull-up values (typ.) for SDO/SA0 and CS pins

@Vdd = 1.8 V, T = 25°C unless otherwise noted. The product is factory calibrated at 1.8 V. The operational power supply range is from 1.62 V to 3.6 V.

Table 4. Electrical characteristics

1. Low-power mode 1. Low-noise setting disabled.
2. 4 mA is the maximum driving capability, that is, the maximum DC current that can be sourced/sunk by the digital pad in order to guarantee the correct digital output voltage levels V OH and V OL .

Stresses above those listed as 'absolute maximum ratings' may cause permanent damage to the device. This is a stress rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Table 9. Absolute maximum ratings

Supply voltage on any pin should never exceed 4.8 V.

Table 9. Absolute maximum ratings

This device is sensitive to mechanical shock, improper handling can cause permanent damage to the part.

This device is sensitive to electrostatic discharge (ESD), improper handling can cause permanent damage to the part.

To meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions, and product status are available at: www.st.com. ECOPACK is an ST trademark.