AUTOMOTIVE AM/FM ANTENNA AMPLIFIER SUBSYSTEM

The MT1120 is an advanced, lowpower, highly integrated single-chip amplifier IC specifically designed for automotive AM/FM antenna systems requiring low noise and very low distortion. Additionally, the MT1120 integrates two true-RMS power detectors and two uncommitted op-amps in order to realize an AGC function for AM and FM by simply adding external PIN diodes. The thresholds of the AM and FM AGC function are variable and can be set according to the application requirements.

FEATURES

• AM input frequency range 0.15 MHz to 30 MHz supports AM, DRM and HD Radio standards in the longwave, midwave and shortwave band

• FM input frequency range 76 MHz to 162.4 MHz supports FM and HD Radio standards in the FM and weather band

• Fully integrated amplifiers for AM and FM

• Fully integrated RMS level detectors and general purpose op-amps (PIN-diode drivers) for easy implementation of AGC functions for AM and FM

• On-chip reference voltage generator and high output voltage op-amp builds a reliable low-cost voltage regulator function

• Low noise

• Low power consumption

• Ultra low distortion

• Very high AM input impedance

• Very small package

• Highly sophisticated temperature compensation design technology to support the extended automotive ambient temperature range from -40° to 115°C.

• Integrated ESD protection

• Minimal external components

• 28-pin QFN package

APPLICATIONS

• In-glass antennas

• Active roof antennas

• Other active AM/FM antenna systems