CMX994AQ4
Product Description
The CMX994A is one of a family of direct conversion receiver ICs with PowerTrade, the ability to dynamically select power vs. performance modes to optimise operating trade-offs. It includes a broadband LNA with gain control followed by a high dynamic range, very high IIP2, I/Q demodulator. The receiver baseband section includes amplifiers and precise, configurable bandwidth, baseband filter stages. LO generation is provided by an integer-N PLL and a VCO negative resistance amplifier; an external LO may also be used. LO dividers are provided for flexible multi-band operation. The device operates from a single 3.3V supply over a temperature range of 40°C to +85°C and is available in a small 40-pin VQFN (Q4) package.
The CMX994A enables a reduction in power consumption, by allowing LO phase-correction to be turned off. A further reduction is possible by disabling either the I or Q channel in a channel-mirroring mode.
Features
- Rx single conversion to zero IF, near-zero IF or low IF; zero IF eliminates image responses
- Very high mixer IIP2 for practical zero IF receiver
- 100MHz to 940MHz I/Q demodulator
- 100MHz to 940MHz I/Q demodulator
- LNA with gain control
- Local Oscillator with LO synthesiser, VCO negative resistance amplifier, Rx LO divide by 2, 4 or 6 modes, and Tx LO Output with divide by 1, 2, 4, or 6 modes
- Precise filtering with 1:2:4 bandwidth select control
- 3.0V 3.6V Low power Operation
- Small size 40-pin VQFN Package
- Standard and Additional Low Power Modes
| Voltage: | 3.0 to 3.6 VDC |
|---|---|
| Form factor: | 40-pin VQFN |
| Temperature: | -40 to +85 °C |
| Dimensions: | 6.0 x 6.0 x 0.9 mm |
| Current: | 42 mA |
| Reference Frequency Input: | 5 to 30 MHz |
| Local Oscillator Input: | 200 to 1100 MHz |
| RF/IF Input: | 100 to 1000 MHz |
| RF/IF Output: | I/Q |
| On-Chip PLL: | yes |
| On-chip VCO: | yes |
| Gain: | 110.5 dB (450 MHz in) |
| Noise Figure: | 2 dB (LNA) 15dB (IQ demod) 13.5dB (Mixer) |
| C-BUS (SPI) Control Interface: | yes |