ST TDR011V1 User Manual
2-stage RF power amplifier with LPF based on the
PD85006L-E and STAP85050 RF power transistors
Features
■ Excellent thermal stability
■ Frequency: 400 - 470 MHz
■ Supply voltage: 13.6 V
■ Output power: 50 W
■ Current: < 10 A
■ Input power: 20 dBm
■ Harmonics level < -45 dBc
■ Output low-pass filter
■ Power detection
■ Temperature sensor
Description
The STEVAL-TDR011V1 demonstration board is
a two-stage 50 W RF power amplifier which
includes an output LPF (low-pass filter) for
harmonics rejection. It also features power
detection and a temperature sensor.
STEVAL-TDR011V1
L = 88.8 mm, W = 47.5 mm
Table 1. Device summary
Order code
STEVAL-TDR011V1
The main purpose of the board is to demonstrate
the functioning and performance of the
PD85006L-E and the STAP85050 devices from
the LdmoST plastic family of RF power
transistors.
The application is specifically designed for 2-way
analog and digital mobile radios.
March 2010 Doc ID 17340 Rev 1 1/12
www.st.com
12
Contents STEVAL-TDR011V1
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12 Doc ID 17340 Rev 1
STEVAL-TDR011V1 Electrical data
1 Electrical data
1.1 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
T
CASE
DD
I
D
T
A
Supply voltage
Drain current 12 A
Operating case temperature -10 to +85 °C
Max. ambient temperature +55 °C
1. Value related to the voltage regulator LD2980ABM50TR used in the application.
1.2 Electrical characteristics
(1)
16 V
TA = +25 °C, VDD = 13.6 V, V
APC
adjusted
Table 3. Electrical specifications
Symbol Test conditions Min. Typ. Max. Unit
Freq. Frequency range 400 470 MHz
P
I
TOTAL
Gain @ P
Harmonics @ P
@ P
IN
@ P
= 50 W 20 dBm
OUT
= 50 W 10 A
OUT
= 50 W 27 dB
OUT
= 50 W -50 / -74 dBc
OUT
Doc ID 17340 Rev 1 3/12
Typical performance STEVAL-TDR011V1
0
10
20
30
40
50
60
70
370 380 390 400 410 420 430 440 450 460 470 480 490
Frequency (MHz)
Pout (W)
3
4
5
6
7
8
9
10
Id (A)
Pout Id
Vdd = 13.6V
Idq = 200 + 2x 200mA
Pin = 20dBm
20
22
24
26
28
30
32
370 380 390 400 410 420 430 440 450 460 470 480 490
Frequency (MHz)
Gain (dB)
Vdd = 13.6V
Idq = 200 + 2x 200mA
Pin = 20dBm
20
25
30
35
40
45
50
55
60
65
380 390 400 410 420 430 440 450 460 470 480 490
Frequency (MHz)
Efficiency (%)
Vdd = 13.6V
Idq = 200 + 2x 200mA
Pin = 20dBm
-10
-8
-6
-4
-2
0
380 390 400 410 420 430 440 450 460 470 480 490
Frequency (MHz)
IRL (dB)
Vdd = 13.6V
Idq = 200 + 2x 200mA
Pin = 20dBm
2 Typical performance
Figure 1. Output power and drain current vs.
Figure 3. Efficiency vs. frequency Figure 4. Input return loss vs. frequency
frequency
TDR011V1_01
TDR011V1-03
Figure 2. Gain vs. frequency
TDR011V1_02
TDR011V1-04
4/12 Doc ID 17340 Rev 1
Loading...