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E06X01-CR

Note) This IC has pins whose electrostatic discharge strength is weak as the high-frequency process is used. Take care of

handling the IC.

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license

by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating

the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

CXA3685ER

Direct Conversion IC for Digital Satellite Broadcast Tuner

Description

The CXA3685ER is an IC developed for direct orthogonal detection of L band (1 to 2GHz) IF signals in a digital

satellite broadcast reception tuner.

This direct conversion (Zero-IF) technology eliminates the need for the SAW filter that was formerly necessary.

In addition, the CXA3685ER incorporates an RF gain control amplifier, oscillator circuit, wide-band phase

shifter circuit and other RF circuits, a baseband LPF, baseband gain control amplifier, tuning PLL, and the

inductor and varactor diode needed for a tuning VCO. This makes it possible to realize the front-end RF block

without tuning the RF circuits.

(Applications: BS/CS digital broadcast (ISDB-S) tuner)

Features

Low power consumption: 430mW (typ.)

No need for an external inductor and varactor diode

3.3V single power supply

Reception frequency: 950MHz to 2150MHz

Wide input range (typ. –65dBm to –15dBm)

Internal output for controlling an external attenuator

Reference signal output for the demodulation circuit

Enables to use external reference signals

Small package: 48-pin VQFN

Enables to reduce power consumption in power save mode when not used: 180mW (typ.)

Package

48-pin VQFN (Plastic)