ST TDR014V1 User Manual
Demonstration board based on the PD55008-E
Features
■ Excellent thermal stability
■ Frequency: 400 - 500 MHz
■ Supply voltage: 12.5 V
■ Output power: 8 W
■ Efficiency: 48 % - 54 %
■ Load mismatch: 20:1
■ BeO-free amplifier
Description
The STEVAL-TDR014V1 is a demonstration
board using the PD55008-E common source Nchannel enhancement-mode lateral field effect RF
power amplifier. It is designed as a driver for UHF
mobile radio applications.
STEVAL-TDR014V1
for UHF mobile radio
Table 1. Device summary
Order code Mechanical specification
STEVAL-TDR014V1 L = 60 mm, W = 30 mm
October 2010 Doc ID 18112 Rev 1 1/11
www.st.com
11
Contents STEVAL-TDR014V1
Contents
1 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/11 Doc ID 18112 Rev 1
STEVAL-TDR014V1 Electrical characteristics
1 Electrical characteristics
TA = +25 °C, VDD = 12.5 V, I
= 100 mA
DQ
Table 2. Electrical Specification
Symbol Test conditions Min. Typ. Max. Unit
Freq Frequency range 400 500 MHz
P
OUT
Gain @ P
ND @ P
H2 2
H3 3
= 8 W 13.9 ± 0.7dB dB
OUT
= 8 W 48 54 %
OUT
ND
Harmonic @ P
RD
Harmonic @ P
= 8 W -53 -50 dBc
OUT
= 8 W -60 -55 dBc
OUT
VSWR Load mismatch all phases @ P
= 8 W 20:1
OUT
810 W
Doc ID 18112 Rev 1 3/11
Typical performance STEVAL-TDR014V1
18
V
V
2 Typical performance
Figure 1. Output power vs. input power Figure 2. Gain vs. output power
14
13
12
11
10
9
8
7
6
5
4
Output Power (W)
3
2
1
0
00000 111 1111
Vdd=
Idq=
12.5
100
V
mA
Input Powe r (W)
380 400 420 440
460 480 500
17
16
15
14
13
12
11
Gain (dB)
10
9
8
7
6
0 2 4 6 8 10 12 14
Vdd=
Idq=
12.5
100
V
mA
Pout (W)
380 400 420 440
460 480 500
Figure 3. Drain efficiency vs. output
70
65
60
55
50
45
40
35
Eff (%)
30
25
20
15
10
power
12.5
dd=
100
Idq=
02468101214
Pout (W)
380 400 420 440
460 480 500
mA
Figure 4. Gain vs. frequency
18
16
14
12
10
Gain (dB)
8
6
4
360 380 400 420 440 460 480 500 520 540
Freq (MHz)
Pout = 8W
4/11 Doc ID 18112 Rev 1
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