ATR4252 Datasheet, PDF (2/10 Pages) ATMEL Corporation – All-in-One IC Solution for Active Antennas

2. Pin Configuration
Figure 2-1. Pinning VQFN 4x5 / 28L
22 21 20 19 18 17 16 15
AM LNA IN 23
14 FMC
AM LNA SOURCE 24
13 FMDET
CASCODE FILTER 25
AM LNA OUT 26
ATR4252
12 FMTC
11 VS
AMBIAS 27
10 AMOUT
AMBUF IN 28
9 GND1
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Table 2-1.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Pin Description
Symbol
ANTENNA SENSE
VS FILTER
VSTART
OVDET
VREGO
AMTC1
AMTC2
AMDET
GND1
AMOUT
VS
FMTC
FMDET
FMC
FMPD
FME
FMB
FMBIAS
GND2
Function
Antenna sense input
Supply voltage filter input
Comparator input of voltage detector
Overvoltage detection input
Output of voltage regulator
AM AGC time-constant capacitance 1
AM AGC time-constant capacitance 2
Level detector input of AM-AGC
Ground AM
AM output, impedance matching
Supply voltage
FM AGC time constant
Level detector input of FM-AGC
Collector of FM amplifier (NPN)
FM AGC output for pin diode
FM amplifier emitter(NPN)
FM amplifier base (NPN)
Reference voltage 2.7V FM
Ground FM
2 ATR4252 [Preliminary]
9154AS–AUDR–09/09