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 1st Mixer Input Matching Components for 455MHz ...........................11
Table 5 1st 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 3rd 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 1st Mixer Input.................................11
Figure 7 Example External Components – Receive 1st 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
2012 CML Microsystems Plc
4
D/991_992/18
CMLMICRO [ CML MICROCIRCUITS ]
