ATR4253C Integrated Circuit Solution for Active Antennas
■The Atmel® ATR4253C is a highly integrated high-performance IC for active antenna amplification. The device has a built-in AGC, antenna detection, a power supply regulator and two driver stages for external PIN diodes.
■The Atmel ATR4253C is based on BICMOS technology. The device is designed in particular for car applications and is suitable for active antennas located in several positions within the car such as bumpers, windscreen, mirrors or windows.
●Functional Description
■The Atmel® ATR4253C is a highly integrated antenna amplifier with a broad range of features and functions. It compensates cable losses between the antenna and the car radio, which is usually placed far away from the antenna. The device can be used in the frequency range of 50MHz up to 900MHz (i.e., FM, DAB (+), DMB, DVB-T, ISDB-T, etc.) and has the flexibility to address different antenna types (e.g., glass, windscreen, roof antennas).
■A separate automatic gain control (AGC) function is integrated in order to avoid overdriving the RF amplifier at large signal conditions.
■The integrated PIN diode drivers help to reduce the external component cost and to minimize the board space.The external component cost can be further reduced as the voltage regulation stage is also integrated. This stage provides overvoltage protection and current limitation. An external transistor is used as power driver for this stage.
●Features：
■Highly integrated - All-in-one active antenna IC
■Operating frequency range: 50MHz to 900MHz
■Main application 76MHz to 108MHz (broadcast FM worldwide)
■Integrated AGC
■Integrated driver for PIN diodes
■Integrated power supply regulator
■Integrated antenna sensor
■High dynamic range
■Excellent noise performance
■High intercept point 3rd order
■RF amplifier adjustable to various cable impedances
■Low noise output voltage
■Low power consumption
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Datasheet |
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Please see the document for details |
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QFN;VQFN |
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English Chinese Chinese and English Japanese |
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11/14 |
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Revision 9265C |
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9265C |
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926 KB |
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