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1384

AM/FM TUNER MODULES

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M I C R O T U N E™

1384 SERIES AM/FM TUNER MODULES

AUTOMOTIVE APPLICATIONS

APPLICATIONS

• High-end car radios

FEATURES

AM

• Up/down conversion

• Excellent sensitivity

• Superior selectivity due to

highly sophisticated filter

technology

• Noise blanker at second IF

• High AGC dynamic range

• AM Stereo output available

• AGC-threshold programmable

FM

• Double down-conversion

• Selective prefilter circuit

• Image reject mixers

• Keyed AGC selectable, AGC-

threshold programmable

• Dynamic threshold extension

for superior sensitivity

selectable

• Outstanding selectivity due to

fixed and variable IF filters with

hardware “closed-loop” control

• Supports inaudible RDS

updating

• Weather band optional

GENERAL

• Available for US, European,

and Japanese markets

• I2C bus controlled

• Very fast PLL

• On-board EEPROM supports

digital alignment for AM and

FM

• IF Counter information

available via I2C bus

• Programmable switching

output (open collector)

1384 AM/FM Tuner Module

The 1384 Series AM/FM Tuner

Modules are high-end custom

and semi-custom products

specifically designed to meet the

demanding performance,

market, and pricing targets of

automotive customers. The 1384

Series AM/FM Tuners combine

the low system integration effort

of a standard “plug and play”

module with outstanding features

and absolute high-end

performance.

These tuner modules are

designed for different standards

in the US, Europe, and Japan,

giving them “world” tuner

functionality.

The AM section contains an

up/down conversion system with

an active prestage and an audio

output. Features such as

sensitivity and large signal

performance, together with the

functionality of the implemented

noise blanker, help ensure that

the 1384 Series Tuner Modules

produce clear AM reception

even in critical situations.

The FM section contains a

double down-conversion system

with a selective prefilter circuit

and MPX signal as well as RDS-

MPX signal output. Using

appropriate external signal

processing, the stereo signal and

the RDS/RBDS data can be

derived from these outputs. The

dynamic selectivity function

evaluates the current receiving

situation and the current

modulation continuously and

controls the optimum IF

bandwidth (25 kHz to 155 kHz)

automatically. The dynamic

threshold extension automatically

improves the S/N ratio at low RF

input levels. Using these

features, the 1384 Series Tuner

Modules produce audible signals

where standard tuners produce

only noise and interference.

The integrated RDS update

algorithm controls the down-lined

audio processor (special models

only) and supports the control of

alternative frequency evaluations

so that they are absolutely

inaudible.

Band selection, tuning, and

several tuner functions are

controlled via I2C serial bus.

Product Brief

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