Product Summary
The LA1781 is a Single-Chip Tuner IC for Car Radio. Functions of the LA1781 are FM front end, FM IF, Noise canceller, Multiplex, AM up-conversion, FM/AM switch, MRC.
Parametrics
LA1781 absolute maximum ratings: (1)Maximum supply voltage: VCC1 max Pins 6, 40, and 61 is 9 V, VCC2 max Pins 7, 45, 54, 59, and 60 is 12 V; (2)Allowable power dissipation Pd max Ta 2 55℃: 950 mW; (3)Operating temperature Topr: –40 to +85 ℃; (4)Storage temperature Tstg: –40 to +150 ℃.
Features
LA1781 features: (1)The FM front end provides excellent 3-signal characteristics equivalent to those of the LA1193; (2)Superlative listenability due to improved medium and weak field noise canceller characteristics.; (3)Improved separation characteristics; (4)Anti-birdie filter; (5)Improved AM and FM thermal characteristics 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); (6)Sample-to-sample variation reduction circuit built into; (7)the FM IF circuit(Fixed resistors are used for the SD, keyed AGC, mute on adjustment, ATT, SNC, and HCC functions) .
Diagrams
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LA1781M |
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LA17000M |
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LA1776M |
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LA1780M |
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LA1781M |
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LA1784M |
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LA1787M |
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