CMX993 Datasheet, PDF (2/26 Pages) CML Microcircuits – Programmable 30dB Output Gain Range

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