MT1119

Description

The MT1119 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 MT1119 has an integrated true-RMS power detector and an uncommitted op-amp in order to realize an AGC function for FM by simply adding external PIN diodes. The threshold of the FM AGC function is variable and can be set according to the application requirements. The onchip 2.55V temperature compensated reference generator and high output voltage op-amp combine to form a low-cost, reliable, automotive-capable power supply which can be directly derived from the car battery.

The MT1119 is capable of amplifying signals with frequencies in the 0.15 MHz to 30 MHz range for AM and 76 MHz to 165 MHz range for FM. External components determine the gain of the AM and FM amplifiers and can also be modified to extend the operating frequency of the MT1119.

The AM amplifier uses a highly sophisticated design technology in order to reach low noise, very low distortion, high input impedance and its capability to drive very low output impedance. The FM amplifier is matched to 50 ohms and is specially designed to perform with very low noise and distortion.

The small 24-pin QFN package of the MT1119 and the requirement for minimal external
components enables a compact, cost-effective solution fulfilling automotive requirements.

Key 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 165 MHz supports FM and HD Radio standards in the FM and weather band
• Fully integrated amplifiers for AM and FM
• Fully integrated RMS level detector and general purpose op-amp (PIN-diode drivers) for easy implementation of AGC function for 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
• 4x4mm 24-pin QFN package