Overview

The LA1787NM integrates the six circuit blocks required in a car tuner on a single chip.

Features

•Improved noise prevention and reduction.

- Excellent three-signal characteristics equivalent to the Sanyo LA1193 FM front end IC.

- Improved medium and weak field noise canceller characteristics provide superb listenability.

- Improved separation.

- Built-in anti-birdie filter.

- Improved AM and FM temperature characteristics.

- Excellent FM S-meter linearity.

- Modified noise canceller circuit achieves improved noise rejection.

• Improved AM adjacent channel characteristics (∆40kHz).

• Double conversion AM tuner (upconversion).

- Fewer external components required than earlier double conversion tuners, no crystal required (when used as a pair with the LC72144).

•Built-in FM IF circuit sample-to-sample variations correction circuit for the FM IF circuit.

(The SD, KEYEDAGC, MUTE ON, ADJ, MUTE ATT, SNC, and HCC pins can all used fixed resistors.)

• Improved FM separation temperature characteristics.

•This product inherits the block arrangement of the LA1780M, and allows pin compatible design in end products.

• The LA1787NM adds an FM S-meter shifter function to the LA1787M.