Page 1
Preliminary Data Sheet AS3801
SSOP-16
CDMA+
CDMA-
GND
GND
GND
GND
GND
PWD
OUT-
OUT+
GND
GND
VCC
VCC
VCC
VCTRL
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8
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9
AS3801
CDMA/FM TRANSMIT AGC
AMPLIFIER AS3801
Austria Mikro Systeme International AG
Key Features
r Supports dual mode operation.
r -45dB to +40db gain control guaranteed.
r High OIP3 of 15dBm @ max. gain @ -51dBm
input power.
r Single 3.6V supply.
r Temperature and supply stabilized.
r Power down feature.
r 100MHz to 300MHz operation.
r Silicon BiCMOS process.
r Miniature surface mount 16 pin, 150 mil SSOP
package.
Compatibility
The AS3801 is designed to be functionally or/and
pin compatible to the following products:
r RF9909 (RF Micro Devices), pin compat.
r Q5505 (Qualcomm), pin compat.
r CXA3002N (Sony)
General Description
The AS3801 is a gain controlled amplifier designed
for the transmit section of dual mode CDMA/FDM,
TDMA/FDM or FM/FDM cellular phones.
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
r Digital cellular systems with transmission
methods: CDMA/FDM, TDMA/FDM, FM/FDM
and TDMA/TDD.
r Examples: IS-95 CDMA, IS-54 DAMPS, AMPS,
PWT.
r Cordless phones analog / digital.
r General purpose linear IF amp’s.
r WLL / WLAN.
This document contains information on products under development. Austria Mikro Systeme Intl. AG reserves
the right to change or discontinue this product without notice.
Rev. C 1/7 Nov. 98
Page 2
Preliminary Data Sheet AS3801
Absolut Maximum Ratings (non operating)
Symbol Parameter min max Unit Note
VDD Positive Supply Voltage -0.5 7 V
GND Analog Ground 0 0 V
Vin Voltage at every Input Pin Gnd-0.5 VDD+0.5 V
Iin Input Current
(into any pin except supply pins and
except low leakage pin)
Iin_15 Input Current into Low Leakage Pin -25 25 mA
H Humidity Noncondensing 1)
ESD Electrostatic Discharge 1000 V 2)
Tstg Storage Temperature -55 125 deg C
Tlead Lead Temperature 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.
-40 40 mA
Recommended Operating Conditions
Symbol Parameter min typ max Unit Note
VDD Positive Supply Voltage 3.6 V 1)
GND Analog Ground 0 0 0 V
Idd Supply Current 18 21 mA 2)
Tamb Ambient Temperature Range,
Operating Range
Notes:
1) 3.6V ± 5%.
2) Measured at pin VDD, see test schematic, no signal.
Rev. C 2/7 Nov. 98
-30 +80 deg C
Page 3
Preliminary Data Sheet AS3801
TX AGC Electrical Characteristics
Parameter min typ max Unit Note
Frequency Range 100-300 MHz f
Maximum Gain 40 dB VG=3V
Minimum Gain -45 dB VG=0.2V
Noise Figure 6.8 dB max. Gain
Output IP3 15 dBm max. Gain 1)
Gain Variation
(in +/-630 kHz bandwidth, centered
at 130MHz)
Gain Slope Linearity
(over any 6dB segment)
Gain Control Voltage Range 0.2-3 V 0.2V min. Gain
Gain Control Input Impedance 16
Current Consumption 18 20 mA
Input Resistance 1k diff.
Output Impedance 1k diff.
+/-0.05 dB
+/- 3 dB -32 to +72 deg.C
kΩ
Ω
Ω
=300MHz
-3dB
3.0V max. Gain
ref. to GND
Open Collector
1k Ω diff. outside
(500Ω eff.)
Power Down Mode 2)
Notes:
Specifications refered to 130MHz.
1) Two tone measurement is used.
f1=131MHz; f2=132MHz; Input power is -51dBm.
2) High≡Active, Low≡Power save, Input impedance ≥16kΩ.
Rev. C 3/7 Nov. 98
Page 4
Preliminary Data Sheet AS3801
Source
CDMA+
CDMA-
OUT+
Port
OUT-
VCC
L2
L1
Z
0
ZL
eff
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 V
V
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 Z
Zs=1k
Ω
Vp
IF Signal
IN
>=3.4V, RX-AGC Active
PWD-RX
<=0.5V, RX-AGC Off
PWD-RX
Definition of Load Impedance, ZL, and
AS3801 Output Impedance Z
TX-CDMA
O
Measurement
Reference Plane
Vn
Output
Zin=1kΩ (typ)
R
B
Z
L
TX-CDMA Output Port Impedance ZO>10kΩ
Load Impedance ZL=1kΩ
Bias Resistor R=1kΩ
Bias Inductors L1=L2=Choke,
ω.L>>R
Effective Load Z
Leff
B
=500Ω
Rev. C 4/7 Nov. 98
Page 5
Preliminary Data Sheet AS3801
Transfer Characteristic
60,00
40,00
20,00
0,00
0 0,5 1 1,5 2 2,5 3 3,5
-20,00
Gain [dB]
-40,00
-60,00
-80,00
Intermodulation Performance
IIP3, TX AGC, 130 MHz, Vdd= 3.6V, Pin = -51 dBm
20
10
Gain, TX 25 degC
TX, Spec
GainTX, -32degC
Gain TX, 72 degC
Vcntrl [V]
-20
-40
0
0 5 10 15 20 25 30 35 40 45 50
-10
OIP3, IIP3 [dBm]
-20
-30
-40
Gain [dB]
-60
-80
-100
-120
-140
OIP3
IIP3
Pim
Pim [dBm]
Rev. C 2/7 Nov. 98
Page 6
Preliminary Data Sheet AS3801
Pout, TX
Compression Behaviour
30
-1 dB
29
28
27
Gain [dB]
26
25
24
-90 -80 -70 -60 -50 -40 -30 -20 -10 0
Pin [dBm]
0
-10
-20
-30
-40
-50
-60
Gain, Tx
Pout [dBm]
Rev. C 3/7 Nov. 98
Page 7
Preliminary Data Sheet AS3801
Typical Application @ 130MHz
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. C 4/7 Nov. 98
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