ST TDR015V1 User Manual
STEVAL-TDR015V1
Demonstration board using the PD54008L-E for 2-way UHF radio
Features
■ Excellent thermal stability
■ Frequency: 400 - 470 MHz
■ Supply voltage: 7.2 V
■ Output power: 8 W
■ Power gain: 12.0 ± 1.0 dB
■ Efficiency: 56 % - 68 %
■ Load mismatch: 20:1
■ BeO-free amplifier
Description
The STEVAL-TDR015V1 is a demonstration
board using the PD54008L-E LDMOS transistor.
It is designed for 2-way UHF portable radio
applications.
Table 1. Device summary
Part number Mechanical specification
STEVAL-TDR015V1 L = 60 mm, W = 30 mm
October 2010 Doc ID 18095 Rev 1 1/12
www.st.com
12
Contents STEVAL-TDR015V1
Contents
1 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/12 Doc ID 18095 Rev 1
STEVAL-TDR015V1 Electrical characteristics
1 Electrical characteristics
TA = +25 °C, VDD = 7.5 V, I
= 50 mA
dq
Table 2. Electrical specifications
Symbol Test conditions Min. Typ. Max. Unit
Freq Frequency range 400 470 MHz
P
OUT
Gain @ P
ND @ P
H2 2nd harmonic @ P
H3 3rd harmonic @ P
= 8 W 12.0 ± 1.0 dB
OUT
= 8 W 56 - 68 %
OUT
= 8 W -28 / -44 dBc
OUT
= 8 W -58 / -61 dBc
OUT
VSWR Load mismatch all phases @ P
= 8 W 20:1
OUT
78 W
Doc ID 18095 Rev 1 3/12
Impedance STEVAL-TDR015V1
2 Impedance
Figure 1. Impedance illustration
Z
IN
Z
GS
Table 3. Impedance data
D
G
S
ZDL
F (MHz) Z
GS
Z
DL
400 1.588 + j3.459 2.128 + j1.795
410 1.772 + j3.516 2.175 + j2.026
420 1.912 + j3.440 2.236 + j2.266
430 1.827 + j3.236 2.304 + j2.465
440 1.432 + j3.145 2.341 + j2.630
450 0.982 + j3.368 2.385 + j2.771
460 0.682 + j3.742 2.422 + j2.844
470 0.521 + j4.204 2.410 + j2.888
4/12 Doc ID 18095 Rev 1
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