CMX7131Q1
Product description
The CMX148 is a half-duplex, audio, signalling and data processing IC for use in PMR systems that utilise the host µC to perform signalling, including CTCSS/DCS encoding/decoding. The device is intended for use in general leisure and professional PMR terminals. Comprehensive audio processing facilities include complete audio processing, filtering, companding, pre_x0002_or de-emphasis and frequency inversion scrambling. The CMX148 features an FFSK/MSK data modem for packetised or free-format data operations. Signal routing and filtering is included to assist host µC based signal encoding/decoding applications. A DTMF encoder/decoder, a full complement of auxiliary ADCs and DACs and dual synthesised clock outputs are included in this low power PMR processor. The device also has flexible powersaving modes.
Features
- Audio Processing, DTMF and FFSK/MSK Data Modem with Auxiliary Functions for use in Analogue PMR Systems
- Programmable Voice Scrambler
- MSK/FFSK Data Modem with Packet or Free_x0002_format Modes with FEC, CRC, Interleaving and Scrambling
- MSK/FFSK Data Modem with Packet or Free_x0002_format Modes with FEC, CRC, Interleaving and Scrambling
- DTMF and Audio Tone Encoder/Decoder
- Sub-audio Signalling: CTCSS, DCS
- Routing to Support Host µController Signalling
- Tx Outputs for Single, Two-Point or I/Q Modulation
- Dual Auxiliary ADC (4 Multiplexed Inputs), Four Auxillary DACs
| Voltage: | 3.0 to 3.6 VDC |
|---|---|
| Form factor: | 48-pin VQFN |
| Temperature: | -40 to +85 °C |
| Dimensions: | 7.0 x 7.0 x 0.9 mm |
| Current: | 6.8 mA |
| Packaging: | Tray |
| Reference Frequency Input: | 3.6864 to 19.2 MHz (3.6864 MHz typ) |
| Duplex Mode: | Half Duplex |
| Signal IO format: | Analog Audio |
| Input Bandwidth: | 50 to 3300 Hz (Filters Off) |
| C-BUS (SPI) Control Interface: | yes |
| On-chip Analog to Digital Converters: | 2 Aux (Mux 4 i/p) |
| On-chip Digital to Analog Converters: | 4 Aux |