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
Monolithic Linear IC
O3097HA (OT) No. 5733-1/4
SANYO: QIP80E
[LA1895M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Single-Chip Tuner IC for Car Radios
LA1895M
Ordering number : EN5733
No. 5733-4/4
LA1895M
This catalog provides information as of October, 1997. Specifications and information herein are subject to
change without notice.
s
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
s
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
s
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
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