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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)
* 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]
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.
SANYO: QIP80E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
O3097HA (OT) No. 5733-1/4
LA1895M
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ratings 9 1.1 -40 to +85 -40 to +150 Unit V W C C
Operating Conditions at Ta = 25C
Parameter Supply voltage Symbol VCCH VCCL Operating voltage range VCCHop VCCLop Conditions Ratings 8.5 5 7.5 to 9.0 4.5 to 5.5 Unit V V V V
No. 5733-2/4
LA1895M Sample Application Circuit
CCB interface C2B interface
No. 5733-3/4
LA1895M
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. This catalog provides information as of October, 1997. Specifications and information herein are subject to change without notice. No. 5733-4/4

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