LA1781 - Single-Chip Tuner IC for Car Radios

Overview

The LA1781M integrates all six blocks required in a car

radio tuner on a single chip.

Functions

• FM front end

• FM IF

• Noise canceller

• Multiplex

• AM up-conversion

• FM/AM switch

• MRC 

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.

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Shipping:

1. MJD needs about 3 BUSINESS DAY to handle the order after received payment. after receiving your payment. Otherwise, we will state it in the invoice in advance.

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REFUNDS & RETURN:

We offer a warranty on all items that we sold. Item will be tested before ship,it will be in good condition,if there are some problems with the item,feel free to contact us.Please Email us to notify a defective item. Unless otherwise specified, this item comes with 30 days warranty from the shipment date.

You must contact us before returning any product. All returns must be made within 30 days from this shipment date.Return must be in new condition(the SAME CONDITION as it was sent to you)

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