CMX970 Datasheet, PDF (1/4 Pages) CML Microcircuits – Serial bus or direct control operation

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CMX970
IF/RF Quadrature Demodulator
(RF Building Block)
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).
CMX970 Brief Description
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.
Features
 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
 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
Small 16-pin VQFN
N/C
LO
LOGND CBUSOFFN
Applications
 Wireless Data Terminals
 HF, VHF and UHF Mobile
Radio
 Avionics Radio Systems
 High-performance profes-
sional radios
RFGND
RFIN
Gain
VCC
Divide
2/4
Gain
VSS
CSN/
GAIN
SCLK/
DIVSET
RXIP
CDATA/
RESETN
© 2012 CML Microsystems Plc
RXIN
RXQP
RXQN
VDD
CMX970 Function Diagram
1