Quadrature Modulator
CMX993/CMX993W
CONTENTS
Section
Page
1
Brief Description ..................................................................................................1
History.............................................................................................................3
1.1
3.1
2
3
Block Diagrams ....................................................................................................4
Signal List .............................................................................................................5
Signal Definitions ..........................................................................................6
4
5
External Components..........................................................................................7
Power Supply Decoupling ............................................................................7
Quadrature Modulator...................................................................................8
Local Oscillator Input..................................................................................10
4.1
4.2
4.3
General Description ...........................................................................................11
Quadrature Modulator.................................................................................11
Differential Amplifiers..................................................................................11
Reference Voltages .....................................................................................12
Data Interface...............................................................................................12
5.1
5.2
5.3
5.4
6
C-BUS Interface and Register Description ......................................................13
General Reset Command: C-BUS address $01 .......................................13
General Control Register: C-BUS address $02 8-bit write-only............14
Gain Control Register: C-BUS address $05 8-bit write-only ................14
Frequency Control Register: C-BUS address $08 8-bit write-only .......15
6.1
6.2
6.3
6.4
7
8
Application Notes...............................................................................................16
Typical Performance ...................................................................................16
Intermodulation and Modulator Spurious.................................................18
7.1
7.2
Performance Specification................................................................................20
Electrical Performance................................................................................20
Packaging.....................................................................................................26
8.1
8.2
2013 CML Microsystems Plc
2
D/993/10
CMLMICRO [ CML MICROCIRCUITS ]
