ST TDR022V1 User Manual
RF power amplifier using the PD85025-E
for UHF OFDM and 2-way mobile radios
Features
■ Excellent thermal stability
■ Frequency: 340 - 520 MHz
■ Supply voltage: 15 V
■ Output power: 10 WPEP
■ Gain: 16.5 dB min.
■ IMD3 < -27 dBc at 10 WPEP
■ Load mismatch: 20:1
■ BeO free amplifier
Description
The STEVAL-TDR022V1 is an demonstration
board using PD85025-E LDMOS transistor and
designed for UHF OFDM and 2-way mobile
radios.
STEVAL-TDR022V1
Mechanical specification:
L = 60 mm, W = 30 mm
Table 1. Device summary
Order code
STEVAL-TDR022V1
October 2010 Doc ID 18079 Rev 1 1/8
www.st.com
8
Contents STEVAL-TDR022V1
Contents
1 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2/8 Doc ID 18079 Rev 1
STEVAL-TDR022V1 Electrical characteristics
1 Electrical characteristics
TA = + 25 °C, VDD = 15 V, I
= 220 mA
dq
Table 2. Electrical specification
Symbol Test conditions Min. Typ. Max. Unit
Freq Frequency range 340 520 MHz
P
OUT
Gain @ P
I
H2 2
H3 3
VSWR Load mismatch all phases @ P
2 Tones test - DF = 600 kHz 10 WPEP
= 10 WPEP 16.5 dB
OUT
Drain current @ 10W PEP 1.25 A
D
nd
harmonic @ P
rd
harmonic @ P
= 10 WPEP -37 / -60 dB
OUT
= 10 WPEP -60 / -68 dB
OUT
= 10 W 20:1
OUT
Doc ID 18079 Rev 1 3/8
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