© 2012 CML Microsystems Plc

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CMX970

IF/RF Quadrature Demodulator

(RF Building Block)

CMX970 Brief Description

Features

The CMX970 is a low power IF or RF quadrature demodulator featuring a wide operating

frequency range and low power consumption. Suitable for architectures with IF or RF

frequencies up to 300MHz, the device may be used in low IF systems or those converting

down to baseband. Control of the CMX970 may be either by serial bus or direct control (with

reduced flexibility).

The small, RF-optimised VQFN package and minimal external components make the device

ideal for space-constrained applications.

PP970/4 July 2012

Introduction

The CMX970 is the first of a new

range of RF Building Block ICs

from CML.

Low power consumption,

flexibility and high performance

are key values of the RF Building

Block products.

The CMX970 IF/RF Quadrature

Demodulator offers very low

power consumption and high-

performance over the

operating range of 20 - 300 MHz.

The wide 10MHz I/Q bandwidth,

variable gain adjustment and

serial bus or direct control

operation, deliver a level of

flexibility and previously

unavailable features, at the

heart of the product.

Size is an important factor in

many radio designs, the CMX970

addresses this with its availabil-

ity in a very small 16-pin VQFN

package (4mm x 4mm x 1mm).

Applications

Radio

sional radios

 Flexible RF Building Block solution

 Low power consumption

 High performance

 Flexibility

 Configurability with correction modes

 Best in class intermodulation performance

 Excellent phase/amplitude balance

 Serial bus configuration

 Direct control option for host-less operation

 20-300 MHz IF/RF demodulator

 10MHz I/Q bandwidth

 Serial bus or direct control operation

 Variable gain and dc offset adjustment

 Low power 3.0 - 3.6 V operation

 Small 16-pin VQFN package

Key Benefits

Small 16-pin VQFN

CMX970 Function Diagram

RFGND

N/C

LO

LOGND

CBUSOFFN

RXIN

RXQP

RXQN

RFIN

RXIP

VCC

VSS

VDD

CSN/

GAIN

SCLK/

DIVSET

CDATA/

RESETN

Divide

2/4

Gain

Gain