U4254BM-M Datasheet, PDF (1/14 Pages) ATMEL Corporation – Low-noise AM/FM Antenna Impedance Matching IC

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
Description
The U4254BM-M is an integrated low-noise AM/FM antenna impedance matching cir-
cuit in BiCMOS technology. The device is designed specifically for car applications
and is suitable for windshield and roof antennas.
Figure 1. Block Diagram
U4254BM-M
1
FMIN
2
GND1
3
FMGAIN
4
AGC
14
VS
5
VREF2
FM
I_AGC
VREF
AGC
15
FMOUT
13
AGCADJ
12
VREF1
8
AMIN
AM
7
GND2
11
AMOUT1
10
AMOUT
Rev. 4772B–AUDR–11/03