PRELIMINARY
FRD3500X230
3.5
GH
Z
W
I
MAX
R
EFERENCE
D
ESIGN
(1
W)
Phone: +1 408 850-5790
http:// www.filtronic.co.uk/semis
Revised: 8/10/05
Fax: +1 408 850-5766
Email: sales@filcsi.com
PERFORMANCE (3.5 GHz)
(802.16-2004
WiMAX
Modulation)
30 dBm Typical Output Power, < 2.5% EVM
14 dB Typical Small-Signal Gain
Class B Efficiency 14% (8V / 720 mA I
DQ
)
> 48 dBm 3
rd
Order Intercept Point
Low total components count
DESCRIPTION AND APPLICATIONS
The FRD3500X230 is a 2-stage, connectorized Reference Design that delivers a typical linear power
of 30 dBm with the 802.16-2004 modulation, while maintaining less than 2.5% EVM. The design
features a FPD4000AS driver stage, followed by a FPD10000AF power output stage. Both stages
are dual-biased to allow a range of bias conditions on each stage, allowing operation from Class B to
Class A. Board layout and components list are included.
ELECTRICAL SPECIFICATIONS AT 22C
Parameter
Symbol
Test Conditions
Min
Typ
Max Units
Operating Bandwidth
BW
Class A / AB / B
200
MHz
Small Signal Gain
SSG
Class A: V
DS
= 10V; I
DQ
= 1.6 A
14
dB
Gain Flatness
G
Class A: V
DS
= 10V; I
DQ
= 1.6 A
1.5
dB
Center Frequency (adjustable)
f
CEN
Nominal bias conditions
3.4
3.5
3.6
Power at 1dB Gain Compression
Class A - CW Single Tone
P
1dB
V
DS
= 10V; I
DQ
= 1.6 A
37.5 dBm
Power Gain at dB Gain Compression
Class A - CW Single Tone
G
1dB
V
DS
= 10V; I
DQ
= 1.6 A
13 dB
Channel Power with 802.16-2004
2.5% max. EVM
P
CH
Class AB Mode
V
DS
= 10 V; I
DQ
= 1.25 A
31.0 31.5 dBm
Channel Power with 802.16-2004
2.5% max. EVM
P
CH
Class B Mode
V
DS
= 8 V; I
DQ
= 730 mA typ.
29 30 dBm
Power-Added Efficiency
802.16-2004 modulation
Eff
Class AB Mode
Class B Mode
10
14
%
Operating Current at 30 dBm P
CH
I
OP
V
DD
= 8.0 V; V
GG
= -1.20 / -0.89 V
0.9
A
Nominal Drain Supply
V
DD
All operating conditions
8
V
Nominal Gate Voltages
For Class B Operation
V
GG
V
GG
1 (1
st
Stage)
V
GG
2 (2
nd
Stage)
-1.2
-0.89
V
V
Total DC Power (operating)
P
TOT
Class B at P
CH
= 30 dBm
7.0
W
DEMO BOARD SIZE: 1 x 2 in. (2.54 x 5.08 cm.)
CONNECTORIZED VERSION SHOWN
PRELIMINARY
FRD3500X230
3.5
GH
Z
W
I
MAX
R
EFERENCE
D
ESIGN
(1
W)
Phone: +1 408 850-5790
http:// www.filtronic.co.uk/semis
Revised: 8/10/05
Fax: +1 408 850-5766
Email: sales@filcsi.com
RECOMMENDED OPERATING BIAS CONDITIONS
Drain-Source Voltage:
From 8V to 10V
Quiescent Current:
From 700mA (Class B) to 1.6A (Class A)
ABSOLUTE MAXIMUM RATINGS
1
Parameter
Symbol
Test Conditions
Min
Max
Units
Drain Supply Voltage
V
DD
-3V < V
GS
< +0V
12
V
Gate Supply Voltage
V
GG
0V < V
DD
< +8V
-3
V
Operating Current
I
OP
For V
DS
> 2V
1.8
A
Gate Current
I
G
Forward or reverse current
+60/-15
mA
RF Input Power
2
P
IN
Under any acceptable bias state
500
mW
Channel Operating Temperature
T
CH
Under any acceptable bias state
175
C
Storage Temperature
T
STG
Non-Operating Storage
-40
150
C
Total Power Dissipation
P
TOT
Ambient temperature to 85C
12
W
Gain Compression
Comp.
Under any bias conditions
5
dB
Simultaneous Combination of Limits
3
2 or more Max. Limits
80
%
1
T
Ambient
= 22
C unless otherwise noted
2
Max. RF Input Limit must be further limited if input VSWR > 2.5:1
3
Users should avoid exceeding 80% of 2 or more Limits simultaneously
Notes:
Operating conditions that exceed the Absolute Maximum Ratings could result in permanent damage to the devices.
HANDLING PRECAUTIONS
To avoid damage to the devices care should be exercised during handling. Proper Electrostatic
Discharge (ESD) precautions should be observed at all stages of storage, handling, assembly, and
testing. This product has be tested to Class 1A (> 250V but < 500V) using JESD22 A114, Human
Body Model, and to Class A, (< 200V) using JESD22 A115, Machine Model..
APPLICATIONS NOTES & DESIGN DATA
Recommendations on matching circuits is available from your local Filtronic Sales Representative or
directly from the factory. User must ensure that proper bias sequencing is observed: Gate bias
must be applied before Drain bias, and during power-down the Drain bias must be removed
first.
PRELIMINARY
FRD3500X230
3.5
GH
Z
W
I
MAX
R
EFERENCE
D
ESIGN
(1
W)
Phone: +1 408 850-5790
http:// www.filtronic.co.uk/semis
Revised: 8/10/05
Fax: +1 408 850-5766
Email: sales@filcsi.com
Table 2 Linearity under Class AB bias condition
TYPICAL SMALL-SIGNAL PERFORMANCE:
TYPICAL CLASS AB / B CW PERFORMANCE:
PRELIMINARY
FRD3500X230
3.5
GH
Z
W
I
MAX
R
EFERENCE
D
ESIGN
(1
W)
Phone: +1 408 850-5790
http:// www.filtronic.co.uk/semis
Revised: 8/10/05
Fax: +1 408 850-5766
Email: sales@filcsi.com
Table 1 Power Sweep under Class A bias condition
TYPICAL CLASS A CW PERFORMANCE:
PRELIMINARY
FRD3500X230
3.5
GH
Z
W
I
MAX
R
EFERENCE
D
ESIGN
(1
W)
Phone: +1 408 850-5790
http:// www.filtronic.co.uk/semis
Revised: 8/10/05
Fax: +1 408 850-5766
Email: sales@filcsi.com
All information and specifications are subject to change without notice.
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