CMX991 Datasheet, PDF (4/56 Pages) CML Microcircuits – Two-mode demodulator

RF Quadrature Transceiver / RF Quadrature Receiver
CMX991/CMX992
Table
Page
Table 1 Pin List................................................................................................................... 9
Table 2 Definition of Power Supply and Reference Voltages............................................. 9
Table 3 Decoupling Components ..................................................................................... 10
Table 4 Typical Rx 1^st Mixer Input Matching Components for 455MHz ........................... 11
Table 5 1^st IF Filtering Components for 45MHz ............................................................... 13
Table 6 Rx I/Q Differential to Single Ended Amplifier Components ................................. 13
Table 7 Rx Low IF (455kHz) Components ....................................................................... 14
Table 8 Transmitter Components..................................................................................... 15
Table 9 I/Q Modulator Output Matching Components...................................................... 16
Table 10 Rx LO Input Components.................................................................................. 16
Table 11 IF VCO LO Internal VCO Amplifier Tank Circuit for 180MHz Operation ........... 17
Table 12 IF LO 3^rd Order Loop Filter Circuit for 180MHz Operation ................................ 18
Table 13 Typical Receiver Gain Partitioning .................................................................... 34
Table 14 Typical IF VCO Circuit Values for a Variety of IF Frequencies ......................... 35
Table 15 Receiver Input Match Circuit for Other Operating Frequencies ........................ 36
Table 16 MIXOUT Equivalent Impedances ...................................................................... 37
Table 17 Noise Figure and Gain of IF Amp, VGA, I/Q Mixer and Baseband Filters ........ 38
Table 18 IFIP1 Port Impedance (Parallel Equivalent Circuit Models) .............................. 38
Table 19 IF Noise Figure Measurements at 45 MHz ....................................................... 39
Table 20 Symbol/Error Table for the Tx with 9.6kbps GMSK from an EV9100 ............... 44
Figure
Page
Figure 1 CMX991 – RF Quadrature Transceiver ............................................................... 2
Figure 2 CMX992 – RF Quadrature/Low IF Receiver ........................................................ 2
Figure 3 CMX991 Block Diagram....................................................................................... 7
Figure 4 CMX992 Block Diagram....................................................................................... 7
Figure 5 Recommended Power Supply Connections and Decoupling............................. 10
Figure 6 Example External Components – Receive 1^st Mixer Input................................. 11
Figure 7 Example External Components – Receive 1^st IF Section .................................. 12
Figure 8 Example External Components – Receive I/Q Output....................................... 13
Figure 9 Example External Components – Receive Low IF Output................................. 14
Figure 10 Example External Components – Transmitter ................................................. 15
Figure 11 Example External Components – I/Q Modulator Output.................................. 16
Figure 12 Example External Components – Rx LO Input ................................................ 16
Figure 13 Example External Components – IF LO VCO External Tank Circuit ............... 17
Figure 14 Example External Components – IF LO Loop Filter ........................................ 18
Figure 15 DC Offset Calibration Mode ............................................................................. 20
Figure 16 CMX991 Transmitter Architecture.................................................................... 21
Figure 17 CMX991/CMX992 IF Local Oscillator .............................................................. 22
Figure 18 Typical LO Input Impedance ............................................................................ 23
Figure 19 C-BUS Transactions ........................................................................................ 26
Figure 20 Receiver Gain Control ...................................................................................... 35
Figure 21 Receiver Matching Components ...................................................................... 36
Figure 22 MIXOUT1 Port Impedance (unmatched) ......................................................... 37
Figure 23 IFIP1 Input Impedance at 0dB attenuation....................................................... 38
 2015 CML Microsystems Plc
4
D/991_992/20