Product Description
The CMX992 is a single-chip, high performance, full-featured RF receiver. It operates from 100MHz to 1GHz and its I/Q architecture supports multiple modulation types and bandwidths with a single radio design. The half-duplex CMX991 integrates Rx demodulators, IF PLL and IF VCO subsystems to minimise the external circuits needed when implementing a complete receiver. User-selected modes suit different application requirements.
The Rx path includes an integrated 1st Rx mixer having two outputs to support two external 1st IF filter choices, then an integrated 2:1 input mux followed by VGA and wideband signal level measurement functions, to support AGC implementation. The 1st IF signal is then either I/Q demodulated to Zero-IF or mixed to a Low IF output. The CMX992 provides differential and single-ended Rx output options and differential amplifiers for flexible signal conditioning.
The CMX992 can be used in a wide range of narrowband and wideband wireless products, including multi-mode analogue/digital terminals. The CMX992 can be used where highly linear modulations are being used, e.g. for applications such as TETRA, where a typical transmitter solution would include the CMX998 Cartesian Feedback Transmitter.
The CMX992 operates from a single 3.3V supply over a temperature range of -40°C to +85°C and is available in a 48-pin VQFN (Q3) package.
Features
- RF mixer with output select
- 1st IF input select
- Selectable low IF outputs (450kHz/455kHz)
- Selectable low IF outputs (450kHz/455kHz)
- 1st IF Variable Gain Amplifier (VGA)
- 1st IF Signal Level Indicator (SLI)
- Two-mode demodulator
- I/Q Zero-IF with differential outputs
- IF LO synthesiser
- IF VCO negative resistance amplifier
- 3.3V low power operation
Voltage: | 3.0 to 3.6 VDC |
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Form factor: | 48-pin VQFN |
Temperature: | -40 to +85 °C |
Dimensions: | 7.0 x 7.0 x 0.9 mm |
Current: | 72 mA |
Packaging: | Tray |
Reference Frequency Input: | 5 to 30 MHz |
Local Oscillator Input: | 50 to 1150 MHz |
RF/IF Input: | 100 to 1000 MHz |
RF/IF Output: | 10 to 150 MHz |
On-Chip PLL: | yes |
On-chip VCO: | yes |
Gain: | 75dB |
Noise Figure: | 13dB |
Input Bandwidth: | 135 kHz / 1.4 MHz |
C-BUS (SPI) Control Interface: | yes |