LA1895M Datasheet, PDF (1/4 Pages) Sanyo Semicon Device – Single-Chip Tuner IC for Car Radios

Ordering number : EN5733
Monolithic Linear IC
LA1895M
Single-Chip Tuner IC for Car Radios
Overview
The LA1895M tuner IC includes a bus interface circuit
and a D/A converter circuit on chip to allow all analog
circuit functional block settings to be performed in
software. This means that the roughly 20 adjustment
points that previously required adjustment during
manufacturing can be completely eliminated, thus
achieving a significant rationalization of the end product
manufacturing process. At the same time this also allows
all analog circuit functions to be adjusted optimally for the
reception conditions. Thus this IC both rationalizes end
product manufacturing and provides improved
performance.
Functions
• FM front end
• Noise canceller
• MRC (multipath noise reduction circuit)
• D/A converter (for use by the microcontroller)
• FM IF
• Multiplexer
• CCB interface
• AM tuner (up-conversion AM tuner)
Features
• Full microprocessor control contributes to production
line rationalization, improved performance, improved
reliability, and design standardization.
— Optimal reception system: Tuner functions are
controlled optimally by using a control
microprocessor.
— Automatic adjustment system: Mechanical
adjustments eliminated by system developed in
conjunction with the control microprocessor
(LC72350). Variations due to the IC and the external
components are held to 30% of previous levels.
— Temperature guarantee system: By providing a
temperature information output from the tuner chip
itself and by using the arithmetic functions in the
control microprocessor, this system provides
temperature correction, a function that was
previously difficult to implement.
— Self-diagnosis system: Displays the failure mode.
• System development with a control microprocessor
(LC72350)
• See the individual product catalog for the LC72350
Series
• Miniaturization provided by single-chip tuner IC
• Low power
• Dual-voltage power supply specifications
— 8-V system: FM front end, AM tuner
— 5-V system: Other signal-processing blocks
• Number of external components reduced by single-chip
tuner implementation and system development.
• Support for RDS, FM multiplex, and AM stereo
— Special-purpose output ports: RDS and FM
multiplex output, AM stereo output
— Support for high-speed FM SD operation: the SD
rise time is under 1 ms.
• Support for reception in all parts of the world
— AM up-conversion technique adopted
— Allows switching between AM RF tuned and
detuned modes.
— AM and FM RF tuning circuits are controlled by a
D/A converter
Package Dimensions
unit: mm
3174-QFP80E
[LA1895M]
SANYO: QIP80E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
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