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CMX971 Datasheet(PDF) 2 Page - CML Microcircuits |
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CMX971 Datasheet(HTML) 2 Page - CML Microcircuits |
2 / 25 page Quadrature Modulator CMX971 2015 CML Microsystems Plc 2 D/971/4 CONTENTS Section Page 1 Brief Description .................................................................................................. 1 1.1 History.............................................................................................................. 3 2 Block Diagram ...................................................................................................... 4 3 Pin and Signal List ............................................................................................... 5 3.1 Main Functions ................................................................................................ 5 3.2 Direct Control Functions .................................................................................. 5 4 External Components .......................................................................................... 6 4.1 Power Supply Decoupling ................................................................................ 6 4.2 Quadrature Modulator...................................................................................... 7 4.3 Local Oscillator (LO) Input ............................................................................... 7 5 General Description ............................................................................................. 8 5.1 Programmable Data Interface ......................................................................... 8 5.2 Quadrature Modulator...................................................................................... 8 5.2.1 DC Offsets and Carrier Leakage............................................................... 8 5.3 Local Oscillator ................................................................................................ 8 6 C-BUS Interface and Register Description ........................................................ 9 6.1 General Reset Command .............................................................................. 10 6.1.1 General Reset Command C-BUS address $1A ...................................... 10 6.2 General Control Register ............................................................................... 11 6.2.1 General Control Register: C-BUS address $1B ...................................... 11 6.2.2 General Control Register C-BUS address $EB....................................... 11 6.3 Control Register ............................................................................................. 11 6.3.1 Control Register: C-BUS address $1E .................................................... 11 6.3.2 Control Register C-BUS address $EE .................................................... 12 7 Direct Control Option......................................................................................... 13 8 Application Notes............................................................................................... 15 8.1 Impedance Matching Information .................................................................. 15 8.1.1 LO Input................................................................................................... 15 8.2 Modulator Operation ...................................................................................... 15 8.2.1 Quadrature Accuracy .............................................................................. 16 8.2.2 Linearity................................................................................................... 18 8.2.3 Wideband Noise...................................................................................... 19 8.2.4 Harmonics ............................................................................................... 20 9 Performance Specification ................................................................................ 21 9.1 Electrical Performance................................................................................... 21 9.1.1 Absolute Maximum Ratings .................................................................... 21 9.1.2 Operating Limits ...................................................................................... 21 9.1.3 Operating Characteristics........................................................................ 22 9.2 Packaging ...................................................................................................... 25 |
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