Overview
The LA1193M and LA1193V are front-end ICs developed for use in car radios. It incorporates an extremely wide dynamic range mixer and a new AGC system consisting of a dual-system wide-band AGC and a new keyed AGC to provide excellent interference suppression characteristics.

FEATUREs
• Improved interference characteristics
    — Expanded mixer input dynamic range
    Mixer input usable sensitivity: 15 dBµ
    Mixer input I.M. QS: 90 dBµ
    (The dynamic range has been increased by 6 dB
    over the earlier LA1175M.)
    — Development of a new wide-band AGC circuit
    Improved interference characteristics for both nearchannel interference and far-channel interference
    Improved interference characteristics for the TV band
    — Development of a 3D-AGC system
    The adjacent channel two-signal interference characteristics can be effectively improved without degrading the strong-field three-signal interference characteristics during keyed AGC operation.
• Improved stability design
    — AGC circuit local oscillator isolation
    Measures were taken to prevent the deterioration of AMR, noise level, THD and other characteristics during AGC operation.
    — AGC circuit incorrect operation measures
    The LA1193M provides methods to prevent incorrect operation due to local oscillator injection and loss of DC balance.
• Improved temperature characteristics
    — Conversion gain
    — AGC sensitivity
    — Antenna damping drive output current

Functions
• Double-balance mixer
• Pin diode drive output
• Differential IF amplifier
• Dual-system wide-band AGC circuit
• Local buffer output
• 3D-AGC system
• FET gate drive AGC output
• IF amplifier gain control pin