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ATR4251-PFPY Datasheet(PDF) 3 Page - ATMEL Corporation

Part # ATR4251-PFPY
Description  Low-noise, High-dynamic-range Antenna Amplifier IC
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATR4251-PFPY Datasheet(HTML) 3 Page - ATMEL Corporation

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3
4913J–AUDR–10/09
ATR4251
2.
Pin Configuration
Figure 2-1.
Pinning QFN24
NC
GND
AGC1
AGC2
VREF2
AMIN
NC
VS
AGCCONST
VREF4
AMOUT1
GND1
24 23 22 21 20 19
7 8
9 10 11 12
18
17
16
15
14
13
1
2
3
4
5
6
Table 2-1.
Pin Description QFN24
Pin
Symbol
Function
1
NC
Pin must not be connected to any other pin or supply chain except GND.
2
GND
Ground FM
3
AGC1
AGC output for pin diode
4
AGC2
AGC output for pin diode
5
VREF2
Reference voltage for pin diode
6
AMIN
AM input, impedance matching
7
NC
Pin must not be connected to any other pin or supply chain except GND.
8
CREG
AM - AGC time constant capacitance 2
9
AGCAMIN
AM - AGC input
10
AGCAM
AM - AGC output for pin diode
11
TCONST
AM - AGC - time constant capacitance 1
12
NC
Pin must not be connected to any other pin or supply chain except GND.
13
GND1
Ground AM
14
AMOUT1
AM output, impedance matching
15
VREF4
Bandgap
16
AGCCONST
FM AGC time constant
17
VS
Supply voltage
18
NC
Pin must not be connected to any other pin or supply chain except GND.
19
AGCIN
FM AGC input
20
FMOUT
FM output
21
GND2
Ground
22
FMGAIN
FM gain adjustment
23
FMIN
FM input
24
VREF1
Reference voltage 2.7V
Paddle
GND
Ground Paddle


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