Product Description
A highly integrated Baseband Signalling Processor IC, the CMX910 fulfils the requirements of the class A and class B marine Automatic Identification System (AIS) transponder market. The CMX910 is half duplex in operation, comprising two parallel I+Q Rx paths and one Tx path. These are configurable for AIS or DSC operation.
The device performs channel filtering and signal modulation/demodulation with associated AIS functions, such as training sequence detection, NRZI conversion and HDLC processing (flags, bit stuffing/de-stuffing, CRC generate/check). An external 1200bps FSK demodulator interface provides a third parallel decode path for DSC, as required by the class A market. Integrated Rx/Tx data buffers and a flexible slot/sample timer are also provided, all of which greatly reduce the processing requirements of the host µC. Provision of a C-BUS expansion port, an RF device enable port and a number of auxiliary ADCs and DACs further simplifies the system hardware design, reducing the overall equipment cost and size.
Features
- Half-Duplex GM(F)SK, FSK and DSC Capabilities
- Slot/Sample Counter with UTC Timing Interface
- Optimum Co-channel and Adjacent-channel Performance
- Flexible Signal Channels Two Simultaneous Rx One Tx Optional FSK Interface
- AIS Data Formatted and Raw Data Modes
- Supports Carrier-Sensing Channel Access (CSTDMA) Operation
- I and Q Radio Interface
- Auxiliary ADC and DAC Functions 5 x (10-bit) DACs 5-Input MUX (10-bit) ADC
- Low-Power (3.0 to 3.6V) Operation
- Low Profile, 64-lead LQFP (L9) Package
Voltage: | 3.0 to 3.6 VDC |
---|---|
Form factor: | 64-pin LQFP |
Temperature: | -40 to +85 °C |
Dimensions: | 12.0 x 12.0 x 1.5 mm |
Current: | 35 mA |
Packaging: | Tape&Reel |
Reference Frequency Input: | 2.4 to 24 MHz |
Duplex Mode: | AIS |
Baud Rate: | 1200 (DSC FSK) 9600 (AIS GMSK/GFSK) |
AIS SOTDMA: | yes |
AIS CSTDMA: | yes |