AMSCO AS3802

Preliminary Data Sheet
AS3802
CDMA/FM RECEIVE AGC
AMPLIFIER AS3802
Austria Mikro Systeme International AG
Key Features
General Description
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Supports dual mode operation.
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-50 to +50db gain control guaranteed.
The AS3802 is a gain controlled amplifier designed
for the receive section of dual mode CDMA/FDM,
TDMA/FDM or FM/FDM cellular phones.
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Single 3.6V supply.
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Temperature and supply stabilized.
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Power down feature.
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80MHz to 250MHz operation.
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Silicon BiCMOS process.
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Miniature surface mount 16 pin, 150 mil SSOP
package.
Key specifications like gain range noise figure, IP3,
temperature range and other specifications are
designed to be in line with the IS-95 Standard for
CDMA cellular communications.
The circuit is designed for narrow band IF
applications but can also be used in wideband
applications.
Applications
Compatibility
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Digital cellular systems with receiving methods:
CDMA/FDM,
TDMA/FDM,
FM/FDM
and
TDMA/TDD.
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Examples: IS-95 CDMA, IS-54 DAMPS, AMPS,
PWT.
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Cordless phones analog/digital.
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General purpose linear IF amp’s.
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WLL / WLAN
The AS3802 is designed to be functionally or/and
pin compatible to the following products:
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RF9907
(RF Micro Devices), pin compat.
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Q5500
(Qualcomm),
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CXA3001N
(Sony)
pin compat.
16 15 14 13 12 11 10 9
AS3802
8
PWD
7
SEL
6
GND
5
FM-
4
FM+
3
GND
2
CDMA-
1
CDMA+
VCTRL
VCC
VCC
VCC
GND
GND
OUT+
OUT-
SSOP-16
Rev. C
1/9
Nov. 98
Preliminary Data Sheet
AS3802
This document contains information on products under development. Austria Mikro Systeme Intl. AG reserves
the right to change or discontinue this product without notice.
Absolut Maximum Ratings (non operating)
Symbol
Parameter
min
max
Unit
VDD
Positive Supply Voltage
-0.5
7
V
GND
Analog Ground
0
0
V
Gnd-0.5
VDD+0.5
V
Vin
Voltage at every Input Pin)
Iin
Input Current
(into any pin except supply pins and
except low leakage pin)
-40
40
mA
Iin_15
Input Current into Low Leakage Pin
-25
25
mA
H
Humidity Noncondensing
ESD
Electrostatic Discharge
Tstg
Storage Temperature
Tlead
Lead Temperature
Note
1)
-55
1000
V
2)
125
deg C
260
deg C
3)
Notes:
1) Defined DIN 40040 cond. F.
2) HBM: R=1.5kOhm, C=100pF.
Open collector outputs have less ESD protection because the protection diode to the positive supply
cannot be implemented (The output swing is higher than Vpos.+0.7V).
3) 260 deg C for 10 sec (Reflow and wave soldering), 360 deg C for 3 sec (Manual soldering).
The above figures conform to CMOS standard for low leakage application.
Recommended Operating Conditions
Symbol
Parameter
VDD
Positive Supply Voltage
GND
Analog Ground
Idd
Supply Current
Tamb
Ambient Temperature Range,
Operating Range
min
typ
max
3.6
0
-30
Unit
Note
V
1)
0
0
V
10
14
mA
+80
deg C
2)
Notes:
1) 3.6V ± 5%.
2) Measured at pin VDD, see test schematic, no signal.
Rev. A
2/9
Jul 98
Preliminary Data Sheet
AS3802
RX AGC Electrical Characteristics
Parameter
min
Frequency Range
Maximum Gain
typ
max
80-250
50
Minimum Gain
-50
Unit
Note
MHz
f-3dB=250MHz
dB
VG=3V
dB
VG=0.2V
Noise Figure
6.5
dB
max Gain
Input IP3
-7
-14
dBm
dBm
min Gain FM
min Gain CDMA 1)
Output CP1
-25
dBm
+/-0.05
dB
Gain Slope Linearity
(over any 6dB segment)
+/- 3
dB
-32 to +72 deg.C
Gain Control Voltage Range
0.2-3
V
0.2V min Gain
3.0V max Gain
ref. To GND
Gain Control Input Impedance
16
kΩ
Current Consumption
10
Gain Var. in +/-630 kHz
bandwidth centered at 85MHz
14
mA
1k diff.
850 sing.
Ω
Ω
CDMA
FM
Output Impedance
500
Ω
500 Ω differential
outside
(Reff. =250Ω)
CDMA to FM Isolation
30
dB
Input Resistance
Power Down Mode
2)
Notes:
Measurements refered to 85MHz.
1) Two tone measurement is used.
f1=86MHz; f2=87MHz; SEL=High for CDMA mode, SEL=Low for FM mode.
2) High≡Active, Low≡Power save, Input impedance ≥16kΩ.
Rev. A
3/9
Jul 98
Preliminary Data Sheet
AS3802
Pin Description
Pin#
Symbol
Function
1
CDMA+
CDMA Positive Differential Input
2
CDMA-
CDMA Negative Differential Input
3
GND
Analog Ground
4
FM+
Single Ended Analog Input
5
FM-
Analog Ground Connection (RX FM Input Reference)
6
GND
Analog Ground
7
SEL
Select, CMOS Input
8
PWD
Power down, CMOS Input
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
Rev. A
VSELECT>=3.4V, CDMA Mode Select
VSELECT<=0.5V, FM Mode Select
VPWD-RX>=3.4V, RX-AGC Active
VPWD-RX<=0.5V, RX-AGC Off
Analog Control Input
VCTRL=0.2V, Low Gain Rail; VCTRL=3V, High Gain Rail
4/9
Jul 98
Preliminary Data Sheet
AS3802
Definition of Load Impedance, ZL, and
AS3802 Output Impedance ZO
Definition of CDMA Source Impedance,
ZS, and AS3802 Input Impedance ZIN
Zs=500Ω
VCC
Vp
IF Signal
Source
Measurement
Reference Plane
RX-CDMA
CDMA+
Z1
R=1kΩ
Z1
OUT+
Output
Port
CDMAVn
Z0
ZL eff
RB
ZL
OUT-
Zin=1kΩ (typ)
The value of the 1kΩ resistor is calculated in the
matching network between the filter and the input of the
RX-APM.
RX-CDMA Output Port Impedance
Load Impedance
Bias Resistor
Bias Inductors
Definition of FM Source Impedance, ZS,
and AS3802 Input Impedance ZIN
Effective Load
*Note:
Z1 can be a resistor or a choke.
If it is a resistor Z1=R1=250Ω then RB is not
used.
If it is a choke, ω.L>>RB and RB=500Ω.
Zs=850Ω
Vp
FM+
IF Signal
Source
Vn
ZO>5kΩ
ZL=500Ω
RB=500Ω *
L=Choke,
ω.L>>RB*
ZLeff=250Ω
FM(AC GND)
Zin=850Ω (typ)
AC GND is defined as FM- in the package pin definition.
Rev. A
5/9
Jul 98
Preliminary Data Sheet
AS3802
Transfer Characteristic
FM RX AGC
80,00
60,00
40,00
Gain [dB]
20,00
Gain, 25 degC
0,00
Gain, 75 degC
-
0,50
1,00
1,50
2,00
2,50
3,00
3,50
Gain, -35 degC
-20,00
-40,00
-60,00
-80,00
Vcntrl [V]
CDMA RX AGC
80,00
60,00
40,00
Gain [dB]
20,00
Gain, 25 degC
0,00
Gain, 75 degC
-
0,50
1,00
1,50
2,00
2,50
3,00
3,50
Gain, -35 degC
-20,00
-40,00
-60,00
-80,00
Vcntrl [V]
Rev. A
6/9
Jul 98
Preliminary Data Sheet
AS3802
Intermodulation Performance
RX CDMA IIP3
-10
-40
-60
-50
-40
-30
-20
-10
0
10
20
30
-15
40
-50
-20
-60
-25
-30
-80
-35
Pim [dBm]
IIP [dBm]
-70
IIP3
Pim
-90
-40
-100
-45
Pin=const. = -26 dBm
Pout=const. = -41 dBm
-50
-110
-55
-120
Gain [dB]
RX FM IIP3
0
-40
-50
-40
-30
-20
-10
0
10
20
30
40
-5
-50
-10
-60
-15
-70
-20
-80
-25
-90
-30
Pim [dBm]
IIP3[dBm]
-60
IIP3
Pim
-100
Pin=const. = -26 dBm
Pout=const. = -41 dBm
-35
-110
-40
-120
-45
-130
-50
-140
Gain [dB]
Rev. A
7/9
Jul 98
Preliminary Data Sheet
AS3802
Compression Behaviour
Output CP1
44
0
-1 dB
43
-5
42
-10
Gain [dB]
-15
40
-20
39
-25
Pout [dBm]
41
Pout, RX CDMA
Gain, RX CDMA
Gain, RX FM
Pout, RX FM
38
-30
37
-35
36
35
-90
-40
-80
-70
-60
-50
-40
-30
Pin [dBm]
Rev. A
8/9
Jul 98
Preliminary Data Sheet
AS3802
Typical Application @ 85MHz
The information furnished herein by Austria Mikro Systeme International is substantially correct and accurate. However, Austria Mikro Systeme
International shall not be liable to licensee or any third party for any damages, including but not limited to personal injury, property damage, loss
of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising
out of the furnishing, performance or use of the technical data. No obligation or liability to licensee or any third party shall arise or flow out of
Austria Mikro Systeme International’s rendering of technical or other services.
Austria Mikro Systeme International makes no warranty, express, statutory, implied, or by description regarding the information set forth herein
or regarding the freedom of the described devices from patent infringement. Austria Mikro Systeme International reserves the right to change
specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with
Austria Mikro Systeme International for current information. This product is intended for use in normal commercial applications. Applications
requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical lifesupport or life-sustaining equipment are specifically not recommended without additional processing by Austria Mikro Systeme International for
each application.
Copyright @ 1998, Austria Mikro Systeme International AG, Schloß Premstätten, 8141 Unterpremstätten, Austria. All rights reserved. The
material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
Rev. A
9/9
Jul 98