RF Quadratur Receiver 100MHz to 1GHz GEH: VQFN-48*VPE: 260*(RoHS-konform)
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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.


  • 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
Form factor:48-pin VQFN
Temperature:-40 to +85 °C
Dimensions:7.0 x 7.0 x 0.9 mm
Current:72 mA
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
Noise Figure:13dB
Input Bandwidth:135 kHz / 1.4 MHz
C-BUS (SPI) Control Interface:yes