LA1781M_09 Datasheet, PDF (1/48 Pages) Sanyo Semicon Device – For Car Radios Single-Chip Tuner IC

Ordering number : EN6038A
LA1781M
Monolithic Linear IC
For Car Radios
Single-Chip Tuner IC
Overview
The LA1781M integrates all six blocks required in a car radio tuner on a single chip.
Features
• Improved noise reduction methods
The FM front end provides excellent 3-signal characteristics equivalent to those of the LA1193M.
Superlative listenability due to improved medium and weak field noise canceller characteristics.
Improved separation characteristics.
Anti-birdie filter.
Improved AM and FM thermal characteristics.
Excellent FM signal meter linearity.
Modified N.C. circuit for improved noise rejection.
• Double conversion AM tuner (up conversion)
Reduces the number of external components required as compared to earlier double conversion tuners, in particular,
no crystal is required (when used in conjunction with the LC72144).
• Sample-to-sample variation reduction circuit built into the FM IF circuit.
(Fixed resistors are used for the SD, keyed AGC, mute on adjustment, ATT, SNC, and HCC functions.)
• The LA1781 inherits the block arrangement of the LA1780M and supports pin-compatible designs.
Functions
• FM front end
• Multiplex
• FM IF
• AM up-conversion
• Noise canceller
• FM/AM switch
• MRC
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
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Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
71509 SY PC/32301TN (OT) No.6038-1/48