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U4254BM-M - Low-noise AM/FM Antenna Impedance Matching IC

General Description

The U4254BM-M is an integrated low-noise AM/FM antenna impedance matching circuit in BiCMOS technology.

The device is designed specifically for car applications and is suitable for windshield and roof antennas.

Figure 1.

Key Features

  • High Dynamic Range for AM and FM Integrated AGC for FM High Intercept Point 3rd-order for FM FM Amplifier Adjustable to Various Cable Impedances High Intercept Point 2nd-order for AM Low-noise Output Voltage Low-power Consumption Electrostatic sensitive device. Observe precautions for handling. Low-noise AM/FM Antenna Impedance Matching IC U4254BM-M.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Features • • • • • • • High Dynamic Range for AM and FM Integrated AGC for FM High Intercept Point 3rd-order for FM FM Amplifier Adjustable to Various Cable Impedances High Intercept Point 2nd-order for AM Low-noise Output Voltage Low-power Consumption Electrostatic sensitive device. Observe precautions for handling. Low-noise AM/FM Antenna Impedance Matching IC U4254BM-M Description The U4254BM-M is an integrated low-noise AM/FM antenna impedance matching circuit in BiCMOS technology. The device is designed specifically for car applications and is suitable for windshield and roof antennas. Figure 1. Block Diagram FMIN GND1 FMGAIN AGC VS 1 2 3 4 14 IAGC FM 15 FMOUT AGC 13 AGCADJ VREF2 5 VREF 12 VREF1 11 AMIN 8 AMOUT1 AMOUT AM 7 GND2 10 Rev.