CML Micro CMX994EF Direct Conversion Receiver
CML Micro CMX994EF Direct Conversion Receiver is a high‑performance IC that replaces earlier receiver generation ICs from CML with improved functionality and power efficiency. This receiver features enhanced PowerTrade™ technology, allowing the designers to dynamically balance power consumption and performance. The CMX994EF receiver integrates a broadband LNA with gain control and followed by a high dynamic range, very high IIP2, and an I/Q demodulator. The receiver baseband section includes amplifiers and precisely configurable bandwidth baseband filter stages. An integrated integer‑N PLL with a VCO negative-resistance amplifier provides flexible local oscillator generation, supporting external LO operation and multiple divide options.
The CMX994EF receiver operates from a single 3V to 3.6V supply voltage and supports frequencies from 100MHz to 1GHz range, with extended operation down to 30MHz. The improved power‑up and power‑down transient response enables faster switching and better power‑saving performance. The CMX994EF receiver is offered in a compact 40‑pin VQFN package and is suitable for narrowband and wideband radio applications.
Features
- Replacement for the direct conversion receiver family:
- CMX994 - Standard and low power mode
- CMX994A - Standard and additional low power modes
- CMX994E - Enhanced, standard, and low power modes
- CMX994G - Enhanced, 30MHz guaranteed performance
- Rx single conversion to zero IF, near-zero IF, or low IF (zero IF eliminates image responses)
- Very high mixer IIP2 for a practical zero IF receiver
- 100MHz to 1GHz I/Q demodulator extended operation down to 30MHz
- Precise filtering with 1:2:4 bandwidth select control
- LNA with gain control
- Local oscillator:
- LO synthesiser
- VCO negative resistance amplifier
- Rx LO divide by 2, 4, or 6 modes
- Tx LO output with divide by 1, 2, 4, or 6 modes
- 3V to 3.6V low power operation
- Small size 40-pin VQFN package
Applications
- Analog/digital multi-mode radio
- Software Defined Radio (SDR)
- Data telemetry modems
- Satellite communications
- Constant envelope and linear modulation
- Rx function compatible with CMX998 Cartesian feedback loop transmitter
- Narrowband with 25kHz, 12.5kHz, 6.25kHz
- Wideband data with >1MHz bandwidth
Related Board
CML Micro EV9942EF Evaluation Board
Enables detailed evaluation of the CMX994EF high‑performance direct conversion receiver IC.