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.
