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AS3801 Datasheet(PDF) 4 Page - ams AG

Part # AS3801
Description  CDMA/FM TRANSMIT AGC AMPLIFIER AS3801
PDF  7 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3801 Datasheet(HTML) 4 Page - ams AG

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Preliminary Data Sheet
AS3801
Rev. C
4/7
Nov. 98
Pin Description
Pin#
Symbol
Function
1
CDMA+
CDMA Positive Differential Input
2
CDMA-
CDMA Negative Differential Input
3
GND
Analog Ground
4
GND
Analog Ground
5
GND
Analog Ground
6
GND
Analog Ground
7
GND
Analog Ground
8
PWD
Power down, CMOS Input
VPWD-RX>=3.4V, RX-AGC Active
VPWD-RX<=0.5V, RX-AGC Off
9
OUT-
Analog Differential Output
10
OUT+
Analog Differential Output
11
GND
Analog Ground
12
GND
Analog Ground
13
VCC
VCC Power Supply
14
VCC
VCC Power Supply
15
VCC
VCC Power Supply
16
VCTRL
Analog Control Input
VCTRL=0.2V, Low Gain Rail; VCTRL=3V, High Gain Rail
Definition of CDMA Source Impedance,
ZS, and AS3801 Input Impedance ZIN
IF Signal
Source
CDMA+
Zs=1k
Ω
Zin=1k
Ω (typ)
Vp
Vn
CDMA-
Definition of Load Impedance, ZL, and
AS3801 Output Impedance ZO
TX-CDMA
ZL
Measurement
Reference Plane
OUT+
Output
Port
OUT-
VCC
L2
RB
L1
Z0
ZLeff
TX-CDMA Output Port Impedance
ZO>10k
Ω
Load Impedance
ZL=1k
Ω
Bias Resistor
R=1k
Ω
Bias Inductors
L1=L2=Choke,
ω.L>>R
B
Effective Load
ZLeff=500
Ω



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