Description Features Applications Downloads Design Resources

RF Building Blocks

CMX993/CMX993W – RF (I/Q) Quadrature Modulator

Two separate, high performance, RF quadrature modulator ICs: the standard CMX993 and the wide bandwidth CMX993W product variant.

The CMX993/CMX993W is an integrated, low voltage IQ quadrature modulator suitable for use in applications operating from 30MHz to 1000MHz.

The device integrates two matched double-balanced mixers driven from a buffered and quadrature split local oscillator. The LO frequency is divided by either a factor of 2 or 4. The mixers form an I/Q vector modulator with programmable gain stages offering up to 30dB of gain control in 2.5dB steps.

Uncommitted low frequency differential amplifiers are provided for users to configure. This may be used to implement functions such as filtering, differential to single ended signal conversion and level shifting.

A digital control interface, C-BUS, (an SPI™ compatible interface) allows gain control as well as power management of individual internal blocks to optimize system performance.

The C-BUS interface operates from its own supply domain enabling the device to be interfaced to different voltage baseband devices. The CMX993 and CMX993W devices are supplied in an RF optimized VQFN package.

Devices are available through our Distributor Network.

CMX993-993W

Features

High Performance (30MHz to 1GHz) RF Modulator
I/Q Modulator
Wideband Noise Figure: -148dB/Hz
Noise Floor: -155dBm/Hz
Programmable 30dB Output Gain Range
Output Power: +3dBm (PEP)
Low LO Drive Requirements: -15dBm
CMX993W – Wide Bandwidth Version
(>50MHz I/Q Bandwidth)
Uncommitted Amplifiers for Filtering and Interfacing
C-BUS (SPI Compatible) Serial Control/Data Interface

Applications

APCO P25, Wireless Data
ISM Transmitters
Digital TV/CATV Modulators
Wireless LAN, Local Loop
IF or RF Modulators
FSK, GMSK, 4-Level FSK, C4FM, QPSK,
QAM, SSB, OFDM and Multi-carrier Systems
Software Defined Radio (SDR)
Satellite Communications
Cellular Picocell/Nanocell Systems

Power Supply Requirement

3.3V

Downloads

RF-Innovations-Document CMX993-993W-data-sheet

Design Resources

Application Notes Scripts Video Evaluation Kits Knowledge Base Package

CMX993: Simplified Output Match

CMX993: Simplified Output Match Application Note

View

GMSK data transfer using the CMX993, CMX7164 and CMX994.

Two scripts that exchange raw 9600baud GMSK messages transmitted by the CMX993 and received by the CMX994.

View

EV9930

The EV9930 and EV9930W EvKits allow for rapid and full evaluation of the CMX993/CMX993W Quadrature Modulator IC by providing a populated pcb with access to all RF, baseband and control signals by either connectors or test points.

EV9930_Product_Preview

EV9930_User_Manual