STMicroelectronics SPIRIT1

Description

The SPIRIT1 is a very low-power RF transceiver, intended for RF wireless applications in the sub-1 GHz band. It is designed to operate both in the license-free ISM and SRD frequency bands at 169, 315, 433, 868, and 915 MHz, but can also be programmed to operate at other additional frequencies in the 300-348 MHz, 387-470 MHz, and 779-956 MHz bands. The air data rate is programmable from 1 to 500 kbps, and the SPIRIT1 can be used in systems with channel spacing of 12.5/25 kHz, complying with the EN 300 220 standard. It uses a very small number of discrete external components and integrates a configurable baseband modem, which supports data management, modulation, and demodulation. The data management handles the data in the proprietary fully programmable packet format also allows the M-Bus standard compliance format (all performance classes).

However, the SPIRIT1 can perform cyclic redundancy checks on the data as well as FEC encoding/decoding on the packets. The SPIRIT1 provides an optional automatic acknowledgement, retransmission, and timeout protocol engine in order to reduce overall system costs by handling all the high-speed link layer operations.

Moreover, the SPIRIT1 supports an embedded CSMA/CA engine. An AES 128-bit encryption co-processor is available for secure data transfer. The SPIRIT1 fully supports antenna diversity with an integrated antenna switching control algorithm. The SPIRIT1 supports different modulation schemes: 2-FSK, GFSK, OOK, ASK, and MSK. Transmitted/received data bytes are buffered in two different three-level FIFOs (TX FIFO and RX FIFO), accessible via the SPI interface for host processing.

Features

• Frequency bands: 150-174 MHz, 300-348

• MHz, 387-470 MHz, 779-956 MHz

• Modulation schemes: 2-FSK, GFSK, MSK,

• GMSK, OOK, and ASK

• Air data rate from 1 to 500 kbps

• Very low power consumption (9 mA RX and 21 mA TX at +11 dBm)

• Programmable RX digital filter from 1 kHz to 800 kHz

• Programmable channel spacing (12.5 kHz min.)

• Excellent performance of receiver sensitivity (-

• 118 dBm), selectivity, and blocking

• Programmable output power up to +16 dBm

• Fast startup and frequency synthesizer settling

• time (6 μs)

• Frequency offset compensation

• Integrated temperature sensor

• Battery indicator and low battery detector

• RX and TX FIFO buffer (96 bytes each)

• Configurability via SPI interface

• Automatic acknowledgment, retransmission, and timeout protocol engine

• AES 128-bit encryption co-processor

• Antenna diversity algorithm

• Fully integrated ultra low power RC oscillator

• Wake-up on internal timer and wake-up on external event

• Flexible packet length with dynamic payload

• length

• Sync word detection

• Address check

• Automatic CRC handling

• FEC with interleaving

• Digital RSSI output

• Programmable carrier sense (CS) indicator

• Automatic clear channel assessment (CCA)

• before transmitting (for listen-before-talk

• systems). Embedded CSMA/CA protocol

• Programmable preamble quality indicator (PQI)

• Link quality indication (LQI)

• Whitening and de-whitening of data

• Wireless M-BUS, EN 300 220, FCC CFR47 15

• (15.205, 15.209, 15.231, 15.247, 15.249), and

• ARIB STD T-67, T93, T-108 compliant

• QFN20 4x4 mm RoHS package

• Operating temperature range from -40 °C to 85 °C

Typical applications

• AMR (automatic meter reading)
• Industrial monitoring and control
• Wireless fire and security alarm systems
• WSN (wireless sensors network)
• Point-to-point wireless link
• Home and building automation

More information

• Datasheet
• IC product information