Tire pressure sensors play a decisive role in the service life of tires, as well as in fuel consumption, ensuring the road safety of vehicles. The SMP290 has a sensor readout ASIC whose core comprises the energy-efficient 32-bit MCU ARC EM6 with FPU, DMA and cache for minimum power consumption. The 64 kB RAM ensures a reliable start. The SMP290 also contains an analog front end for the pressure sensor, temperature measurement via on-chip or external diode, the x- and z-axis acceleration sensor and battery voltage monitoring.
The module implements an advanced power management system on the ASIC with low-power circuits: configurable and high-efficiency DC/DC converter, low-noise bandgap references, low-drop-out regulator, an HF RC oscillator for efficient MCU operation, an accurate low-frequency RC oscillator for sleep mode control, and a low-power, low-frequency RC oscillator for deep sleep mode control. A coordinated digital control system optimizes power consumption and battery life. Developers can choose between 0, 4 and 6 dBm radio power, which relates to the total power consumption.
The sensor module is available in a 3.5 mm x 4.5 mm DFN housing with Wettable Flanks for automatic optical inspection (AOI). It impresses developers with the low number of external components required and the correspondingly low TCO.
In terms of security, the SMP290 offers a low-power hardware implementation of AES-128 encryption. In addition, it performs a cyclic redundancy check (CRC) of all parameters consumed by the digital signal chain, traceability and stored runtime data.
Benefits and features:
- Integrated sensors
- Pressure sensor up to (90 kPa to 920 kPa)
- Acceleration sensor in x- (-330 G to 330 G) and z-direction (-960 G to 960 G)
- Temperature sensor (-40 °C to 125 °C)
- Battery voltage monitoring
- Thermal shutdown
- Improved operation at low temperatures
- Power management system:
o Digital step-down DC/DC operation with 1.9 to 3.6 V
o Optional external tank capacitor to support low battery supply at low temperatures
- Low power consumption at 3 V
- High power RF radio
- Operating temperature: -40 °C to +125 °C
Application examples:
- Tire pressure measurement in wireless TPMS applications
- Compatible with Remote Keyless Entry (RKE) systems
For more information to the SMP290 by Bosch and a direct ordering option, please visit our e-commerce platform at www.rutronik24.com. |
Contact Rutronik:
| Manuel Gauß | Senior Manager Product Marketing Analog & Sensors | +49 7231 801 1284 | manuel.gauss@rutronik.com |