U4254BM Datasheet, PDF (1/12 Pages) TEMIC Semiconductors – Low-Noise AM/FM Antenna Impedance Matching IC

U4254BM
Low-Noise AM/FM Antenna Impedance Matching IC
Description
The U4254BM is an integrated low-noise AM/FM
antenna impedance matching circuit in BICMOS
technology. The device is designed in particular for car
application and is suitable for windscreen and roof
antennas.
Features
D High dynamic range for AM and FM
D Integrated AGC for FM
D High intercept point 3rd order for FM
D FM amplifier adjustable to various cable impedance
D High intercept point 2nd order for AM
D Low noise output voltage
D Low power consumption
Block Diagram
FMIN ¹
GND1 ²
FMGAIN ³
AGC ⁴
VS ¹⁴
VREF2 ⁵
FM
I_AGC
VREF
AGC
AMIN ⁸
13932
AM
7
GND2
Figure 1. Block diagram
15 _FMOUT
13
AGCADJ
12
VREF1
11 _AMOUT1
10 _AMOUT
TELEFUNKEN Semiconductors
Rev. A1, 08-Jul-97
1 (12)