ST TDR005V1 User Manual
RF power amplifier using 2 x SD2943
N-channel enhancement-mode lateral MOSFETs
Features
■ Excellent thermal stability
■ Frequency: 1.8 - 54 MHz
■ Supply voltage: 48 V
■ Output power: 450 W typ.
■ Input power 10 W max.
■ Efficiency: 55 % - 76 %
■ IMD at 300 WPEP < -24 dBc
■ Load mismatch: 3:1 all phases
Description
The STEVAL-TDR005V1 is a RF broadband
power amplifier intended for linear or nonlinear
operation over the band 1.8 to 54 MHz using
2x SD2943 gold metallized N-channel MOS fieldeffect transistors. The temperature compensating
biasing circuit supports class B and class AB
operation.
STEVAL-TDR005V1
Table 1. Device summary
Order code
STEVAL-TDR005V1
STEVAL-TDR005V1 is designed in cooperation
with Specific RF Devices (Germany).
March 2010 Doc ID 14845 Rev 2 1/11
www.st.com
11
Contents STEVAL-TDR005V1
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Photos of STEVAL-TDR005V1 amplifier . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 STEVAL-TDR005V1 class of operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 SD2943 mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1 Mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.2 Mounting sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/11 Doc ID 14845 Rev 2
STEVAL-TDR005V1 Electrical data
1 Electrical data
1.1 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
P
IN
P
OUT
(1)
V
DD
V
GG
I
DD
P
DISS
1. VGG from 9 to 15 V and PIN < 16 W
Input power 16 W
Output power 500 W
Drain supply voltage 50 V
Gate biasing voltage 15 V
Drain current 20 A
Power dissipation 400 W
Doc ID 14845 Rev 2 3/11
Electrical characteristics STEVAL-TDR005V1
2 Electrical characteristics
TA = +25 oC, VDD = 48 V, I
= 2 x 900 mA
DQ
Table 3. Electrical specification
Symbol Test Conditions Min Typ Max Unit
Freq. Frequency range 1.8 54 MHz
P
OUT
Gain P
ND P
H2 2
H3 3
VSWR Load mismatch all phases @ P
PIN = 10 W 350 450 W
= 10 W 16.6 ± 0.6 dB dB
IN
= 10 W 55 - 76 %
IN
ND
Harmonic @ P
RD
Harmonic @ P
= 300 W -24 / -49 dBc
OUT
= 300 W -15 / -58 dBc
OUT
= 300 W 3:1
OUT
4/11 Doc ID 14845 Rev 2
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