ST DB-900-100W User Manual

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100W / 26V / 869-894 MHz PA using 2x PD57060S

DB-900-100W

RF POWER AMPLIFIER DEMOBOARD USING
TWO N-CHANNEL ENHANCEMENT-MODE
LATERAL MOSFETs

• EXCEL L ENT THERMA L STABI LITY

• COMMON SOURCE CONFIGURATION

• P

= 100 W min. with 13 dB gain over

OUT

869-894 MHz

• 10:1 LOAD VSWR CAPABILITY

• BeO FREE AMPLIFIER

TYPICAL CDMA PERFORMANCE:
IS-95 CDMA / 9ch FWD
Pout = 20W
Gain = 13 dB
Nd = 22%
ACPR (750 KHz) : -45 dBc
ACPR (1.98 MHz) : -60 dBc

The

LdmoST

PRELIMINARY DATA

FAMILY

DESCRIPTION

The DB-900-100W is a com mon 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-900-100W

The DB-900-100W is designed in cooperation
with Europeenne de Telecomunications S.A.
(www.etsa.rf), for high gain and broadband
performance operating in comm on source mode

at 26 V, capable of withstanding load mismatch
up to 10:1 all ph ases and with harmo nics 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 12

Power dissipation at Tcase = +85°C 145 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-900-100W

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

= 100 W

12.5 13 dB
Over frequency range: 869 - 894 MHz 100 W
Over frequency range and @ P

from 0.1W to 100 W

P

OUT

P

1dB

Input return Loss P

= 100 W

P

OUT

from 0.1W to 100 W

OUT

Load Mismatch all phases @ P
10:1 VSWR all phases and P
P

= 100 WPEP

OUT

= 100 W

OUT

= 100 W

OUT

from 0.1 to 100W

OUT

+/- 0.5 dB

1dB

40 45 %

-20 -15 dB

-40 -30 dBc

10:1

-76 dBc

-25 dBc

TYPICAL CDMA PERFORMANCE IS 95 / 9ch FWD (Vdd = 26V, Idq = 350mA)

F requency

Pout

CH PWR

(M Hz) (W) (dBm) (dBc) (dBc) (dBc) (dBc) (A) (%)

865 10 40.0 53.4 50.8 67.0 67.0
880 10 40.0 54.2 51.7 68.6 68.3
895 10 40.0 53.2 51.7 69.0 69.0

Pout

CH PWR

ACPR

-750 KHz

ACPR

+750 K Hz

ACPR

-1.98 MHz

ACPR

+1.98 M HzItotal

2.5

Nd

15.4

865 20 43.0 45.0 45.0 64.0 64.0
880 20 43.0 45.1 45.4 64.7 64.7
895 20 43.0 45.2 45.7 66.8 66.5

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3.5

22.0