Wireless Sensor Module

Description

Crossfield’s CFT3002 Wireless Sensor Module offers an easy to implement, low power solution for system integrators that need to add wireless networking capability to their specialty sensors. Featuring an IEEE 802.15.4 transceiver and a programmable signal conditioning circuit, the CFT3002 provides a flexible interface to bridge powered sensors as well as digital, analog and serial ports to support a range of sensors or actuators. The bridge sensor output is amplified by a programmable gain amplifier which is compensated for both temperature and bridge nonlinearities.

The CFT3002 is controlled by a Freescale HSC08 microcontroller with a watchdog timer. The MCU provides 4 KB of random access memory and 60 KB of flash memory. The flash memory can be locked with block protection to prevent readout or inspection. Three low power states are provided including Wait, Stop2 and Stop3. The CFT3002 provides in-circuit programmability through the HCS08 BDM interface.

The CFT3002 provides connectivity to the MCU’s 16-bit timers/pulse width modulators, four 10-bit ADC inputs, keyboard interrupts, and a serial port.

The CFT3002 supports wireless connectivity using a fully compliant IEEE 802.15.4 transceiver that provides 250 Kbps OQPSK modulation across 16 channels in the 2.45 GHz ISM band. The transceiver is connected to a planar inverted F antenna (PIFA) on the circuit board. The IEEE 802.15.4 transceiver is ZigBee™ compliant.

The CFT3002 works in conjunction with Crossfield’s CFT3003 base station transceiver and software. The CFT3003 provides an IEEE 802.15.4 compliant, mobile base station that connects to a laptop or desktop computer through a USB interface. The CFT3003 enables data to be collected from CFT3002 modules using the appropriate wireless networking software.

Features

IEEE 802.15.4 ZigBee™ wireless networking
On-board PIFA antenna
HCS08 microcontroller with 60 KB Flash and 4 KB RAM
Three low-power modes
MCU GPIO with programmable pullups
Bridge excitation and sensor linearization circuitry
Instrumentation amplifier temperature compensation (internal or external temperature sensor)
Calibration logic with programmable lookup table
Over/under scale limiting
Programmable digital/analog/serial I/O
3.4 to 6.0 Volt operation

Download Datasheet

CFT3002 Datasheet