UM2153 datasheet(25/57 Pages) STMICROELECTRONICS

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UM2153

Hardware layout and configuration

On the STM32L4 Discovery kit for IoT node, there are two MP34DT01 microphones: one

with LR pulled to VDD and the second with LR pulled low. DFSDM1_CKOUT and

DFSDM1_DATIN2 are connected for both. In addition, both microphones are spaced at

21 mm apart for the beamforming algorithm to work. Indeed, several algorithm

configurations are available for the user to find the best trade off between audio output

quality and resource consumption. For more details refer to STEVAL-IHM038V1: 3-phase

BLDC/PMSM motor drive up to 50 W, suitable for fan controllers User manual (UM1697) on

the www.st.com website.

The MP34DT01 is available in a package HCLGA (3x4 x1 mm) 4LD, in a top-port design,

SMD-compliant, EMI-shielded package and it is guaranteed to operate over an extended

temperature range from -40°C to +85°C.

7.12.2

Capacitive digital sensor for relative humidity and

temperature (HTS221)

The HTS221 is an ultra-compact sensor for relative humidity and temperature. It includes a

sensing element and a mixed signal ASIC to provide the measurement information through

digital serial interfaces.

The sensing element consists of a polymer dielectric planar capacitor structure capable of

detecting relative humidity variations and it is manufactured using a dedicated ST process.

The HTS221 is available in a small top-holed cap land grid array (HLGA-6L (2 x 2 x 0.9

mm)) package guaranteed to operate over a temperature range from -40 °C to +120 °C.

The main features of the HTS221 are:

•

0 to 100% relative humidity range,

•

Low-power consumption: 2 μA @ 1 Hz ODR

•

Selectable ODR from 1 Hz to 12.5 Hz

•

High rH sensitivity: 0.004% rH/LSB

•

Humidity accuracy: ± 3.5% rH, 20 to +80% rH

•

Temperature accuracy: ± 0.5 °C,15 to +40 °C

•

Embedded 16-bit ADC

•

16-bit humidity and temperature output data

•

SPI and I2C interfaces. On the STM32L4 Discovery kit for IoT node, the I2C2 bus from

STM32L475VG is used.

•

Factory calibrated

•

Tiny 2 x 2 x 0.9 mm package

•

ECOPACK® compliant

7.12.3

High-performance 3-axis magnetometer (LIS3MDL)

The LIS3MDL is an ultra-low-power high-performance three-axis magnetic sensor.

The LIS3MDL has user-selectable full scales of ±4/ ±8/ ±12/±16 gauss.

The self-test capability allows the user to check the functionality of the sensor in the final

application.

The device may be configured to generate interrupt signals for magnetic field detection.

UM2153 Datasheet(PDF) 25 Page - STMicroelectronics

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