ST DB-900-80W User Manual
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DB-900-80W
80W / 26V / 869-894 MHz PA using 2x PD57045S
RF POWER AMPLIFIER DEMOBOARD USING
TWO N-CHANNEL ENHANCEMENT-MODE
LATERAL MOSFETs
• EXCELLENT THERMAL STABILITY
• COMMON SOURCE CONFIGURATION
• P
= 80 W min. with 13 dB gain over
OUT
869-894 MHz
• 10:1 LOAD VSWR CAPABILITY
• BeO FREE AMPLIFIER
TYPICAL CDMA PERFORMANCE:
IS-95 CD MA / 9ch FWD
Pout = 14W
Gain = 13 dB
Nd = 22%
ACPR (750 KHz) : -45 dBc
ACPR (1.98 MHz) : -60 dBc
The
LdmoST
PRELIMINARY DATA
FAMILY
DESCRIPTION
The DB-900-80W is a common source N-Channel
enhancement-mode lateral Field-Effect RF power
amplifier designed for IS-54/-136 & IS-95 base
station applications.
MECH. SPECIFICATION L=80 mm W=50 mm H=10 mm
ORDER CODE
DB-900-80W
The DB-900-80W is designed in cooperation
with Europeenne de Telecomunications S.A.
(www.etsa.rf), for high gain and broadband
performance operating in common source mode
at 26 V, capable of withstanding load mismatch
up to 10:1 all phases and with harmonics lower
than 30 dBc.
ABSOLUTE MAXIMUM RATINGS (T
Symbol Parameter Value Unit
V
P
T
CASE
P
DD
I
D
DISS
amb
Supply voltage 32 V
Drain Current 9
Power dissipation at Tcase = +85°C 135 W
Operating Case Temperature -20 to +85
Max. Ambient Temperature +55
CASE
= 25oC)
A
o
C
o
C
November, 20 2002
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DB-900-80W
ELECTRICAL SPECIFICATION (T
= +25oC, Vdd = 26V, Idq = 2 x 200 mA)
amb
Symbol Test Conditions Min. Typ. Max. Unit
FREQ. Frequency Range 869 894 MHz
Gain P
P
1dB
Flatness
Flatness
ND at P
1dB
IRTL
Harmonic
VSWR
Spurious
IMD
3
OUT
= 80 W
13 14 dB
Over frequency range: 869 - 894 MHz 80 90 W
Over frequency range and @ P
from 0.1W to 80 W
P
OUT
P
1dB
Input return Loss P
= 80 W
P
OUT
from 0.1W to 80 W
OUT
Load Mismatch all phases @ P
10:1 VSWR all phases and P
P
= 80 WPEP
OUT
= 80 W
OUT
= 80 W
OUT
from 0.1 to 80W
OUT
+/- 0.5 dB
1dB
45 50 %
-20 -15 dB
-40 -30 dBc
10:1
-76 dBc
-25 dBc
TYPICAL CDMA PERFORMANCE IS 95 / 9ch FWD (Vdd = 26V, Idq = 300mA)
Frequency
(MHz) (W ) (dB m ) (dB m ) (dBc) (dB c) (dBc) (dB c) (A ) (%)
865 0.63 16.3 28.0 50.5 51. 5 71 70 0.64 3.79
Pout
CH P WR
Pin
CH PW R
Pout
CH PW R
ACPR
-750 KHz
ACPR
+750 KHz
ACPR
-1.98 MHz
ACPR
+1. 98 MHz
Itotal Nd
875 0.63 15.7 28.0 52.0 53. 0 71 71 0.61 3.98
885 0.63 15.3 28.0 54.0 55. 0 71 71 0.60 4.04
895 0.63 14.9 28.0 55.0 54. 5 72 72 0.58 4.18
865 3.98 23.3 36.0 49.0 51. 0 68.0 68.0 1.42 10.78
875 3.98 23.0 36.0 49.5 51. 5 68.0 68.0 1.37 11.18
885 3.98 22.6 36.0 52.0 54. 0 69.0 69.0 1.32 11.60
895 3.98 22.3 36.0 52.0 54. 0 70.0 70.0 1.26 12.15
865 15.85 28.9 42.0 45 45 63 63 2.76 22.09
875 14.79 28.3 41.7 45 45 64 64 2.59 21.96
885 14.13 28.2 41.5 45 45 65 65 2.50 21.73
895 14.79 28.0 41.7 45 45 66 66 2.41 23.61
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