ATR4251 Datasheet, PDF (4/21 Pages) ATMEL Corporation – Low-noise, High-dynamicrange AM/FM Antenna Amplifier IC

Figure 2-2. Pinning SSO20
FMGAIN 1 20 GND2
FMIN 2 19 FMOUT
VREF1 3 18 AGCIN
GND 4 17 VS
AGC1 5 16 AGCCONST
AGC2 6 15 VREF4
VREF2 7 14 AMOUT1
AMIN1 8 13 GND1
CREG 9 12 TCONST
AGCAMIN 10 11 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
Function
FMGAIN
FM gain adjustment
FMIN
FM input
VREF1
Reference voltage 2.7V
GND
FM ground
AGC1
AGC output for PIN diode
AGC2
AGC output for PIN diode
VREF2
Reference voltage for PIN diode
AMIN1
AM input, impedance matching
CREG
AM AGC constant capacitance 2
AGCAMIN AM input, AM AGC
AGCAM
AM AGC output for PIN diode
TCONST AM AGC constant capacitance 1
GND1
AM ground
AMOUT1 AM output, impedance matching
VREF4
Band gap 6V
AGCCONST FM AGC constant
VS
Supply voltage
AGCIN
FM AGC input
FMOUT
FM output
GND2
FM ground
4 ATR4251
4913I–AUDR–03/08