ATR4251 – High-dynamic-range Antenna Amplifier IC

Part Number : ATR4251

Function : High-dynamic-range Antenna Amplifier IC

Manufactures : ATMEL Corporation

Images :

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ATR4251 image

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pinout

Description :

Features High Dynamic Range for AM and FM Integrated AGC for AM and FM High Intercept Point 3rd Order for FM FM Amplifier Adjustable to Various Cable Impedances High Intercept Point 2nd and 3rd Order for AM Low Noise Output Voltage Low Power Consumption Low Output Impedance AM 1. Description The ATR4251 is an integrated low-noise AM/FM antenna amplifier with integrated AGC in BiCMOS2S technology. The device is designed in particular for car applications, and is suitable for windshield and roof antennas. Figure 1-1. Block Diagram QFN24 Package VREF1 24 Low-noise, High-dynamicrange AM/FM Antenna Amplifier IC ATR4251 FM IN 23 FM FM GAIN GND2 OUT 22 21 20 AGC IN Paddle = GND 19 NC- GND AGC1 AGC2 VREF2 AMIN 1 FM amplifier BAND GAP AGC 18 NC- VS AGCCONST VREF4 AMOUT1 GND1 2 17 3 16 4 15 5 AM 14 6 7 8 AGC (AM) 9 10 11 12 13 T NC- NC- CREG AGC AGC AMIN AM CONST – Pin must not be connected to any other pin or supply chain except GND. 4913J–AUDR–10/09 Figure 1-2. Block Diagram SSO20 Package FMGAIN FMIN VREF1 GND AGC1 AGC2 VREF2 AMIN1 CREG 1 2 3 4 5 6 7 8 9 AM AGC (AM) SSO20 Band gap AGC FM amplifier 20 GND2 19 FMOUT 18 AGCIN 17 VS 16 AGCCONST 15 VREF4 14 AMOUT1 13 GND1 12 TCONST 11 AGCAM AGCAMIN 10 2 ATR4251 4913J–AUDR–10/09 ATR4251 2. Pin Configuration Figure 2-1. Pinning QFN24 VREF1 FMIN FMGAIN GND2 FMOUT AGCIN NC GND AGC1 AGC2 VREF2 AMIN 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 16 15 14 13 9 10 11 12 NC VS AGCCONST VREF4 AMOUT1 GND1 Table 2-1. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Paddle Pin Description QFN24 Symbol NC GND AGC1 AGC2 VREF2 AMIN NC CREG AGCAMIN AGCAM TCONST NC GND1 AMOUT1 VREF4 AGCCONST VS NC AGCIN FMOUT GND2 FMGAIN FMIN VREF1 GND Function Pin must not be connected to any other pin or supply chain except GND. Ground FM AGC output for pin diode AGC output for pin diode Reference voltage for pin diode AM input, impedance matching Pin must not be connected to any other pin or supply chain except GND. AM – AGC time constant capacitance 2 AM – AGC input AM – AGC output for pin diode AM – AGC – time constant capacitance 1 Pin must not be connected to any other pin or supply chain except GND. Ground AM AM output, impedance matching Bandgap FM AGC time constant Supply voltage Pin must not be connected to any other pin or supply chain except GND. FM AGC input FM output Ground FM gain adjustment FM input Reference voltage 2.7V Ground Paddle NC CREG AGCAMIN AGCAM TCONST NC 3 4913J–AUDR–10/09 Figure 2-2. Pinning SSO20 FMGAIN FMIN VREF1 GND AGC1 AGC2 VREF2 AMIN1 CREG AGCAMIN 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 GND2 FMOUT AGCIN VS AGCCONST VREF4 AMOUT1 GND1 TCONST AGCAM Table 2-2. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin Description SSO20 Symbol FMGAIN FMIN VREF1 GND AGC1 AGC2 VREF2 AMIN1 CREG AGCAMIN AGCAM TCONST GND1 AMOUT1 […]

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ATR4251 Datasheet


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