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PDF WS2512-TR1G Data sheet ( Hoja de datos )
| Número de pieza | WS2512-TR1G | |
| Descripción | 4 x 4 Power Amplifier Module | |
| Fabricantes | Avago | |
| Logotipo |  |
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WS2512-TR1G
4 x 4 Power Amplifier Module
for UMTS2100 (1920-1980 MHz)
Data Sheet
Description
Features
The WS2512-TR1G, a Wide-band Code Division Multiple
Access (WCDMA) Power Amplifier (PA), is a fully matched
10-pin surface mount module developed for WCDMA
handset applications. This power amplifier module
operates in the 1920-1980 MHz bandwidth.The WS2512-
TR1G meets the stringent WCDMA linearity requirements
for output power of up to 28 dBm.
A low current (Vcont) pin is provided for high efficiency
improvement of the low output power range.
• Excellent linearity
• Low quiescent current
• High efficiency
• 10-pin surface mounting package
4 mm x 4 mm x 1.1 mm (typ.)
• Internal 50 Ω matching networks for both RF input
and output
• RoHS compliant
The WS2512-TR1G features CoolPAM circuit technology
offering state-of-the-art reliability, temperature stability
and ruggedness. The WS2512-TR1G is self contained, in-
corporating 50 Ω input and output matching networks.
Applications
• WCDMA handset (HSDPA)
Functional Block Diagram
Vcc2 (10)
RF
INPUT
(2)
Vcc1 (1)
INPUT
MATCH
DA
INTER
STAGE
MATCH
PA
MMIC
BIAS CIRCUIT & CONTROL LOGIC
Vcont (4)
Vref (5)
OUTPUT
MATCH
MODULE
RF
OUTPUT
(8)
Order Information
Part Number
WS2512-TR1G
No. of Devices
1,000
Container
7" Tape and Reel
1 page  
Characteristics Data (WCDMA, Control Scheme: 3-Mode Control, Vcc = 3.4/1. 5 V, Vref = 2.85 V, T=25°C, Zin/Zout = 50 Ω)
500
450
400 1920 MHz
350 1950 MHz
300 1980 MHz
250
200
150
100
50
0
-10 -5
0
5 10 15 20 25 30
P out (dBm)
30
25
20
15
10 1920 MHz
1950 MHz
5
1980 MHz
0
-10 -5 0 5 10 15 20 25 30
Pout (dBm)
Figure 1. Total current vs. output power
Figure 2. Gain vs. output power
45
40
35 1920 MHz
30 1950 MHz
25 1980 MHz
20
15
10
5
0
-10 -5 0 5 10 15 20 25 30
Pout (dBm)
-30
-35
-40
-45
-50
-55
-60
-10
-5
0
5 10 15
Pout (dBm)
1920 MHz
1950 MHz
1980 MHz
20 25 30
Figure 3. Power added efficiency vs. output power
Figure 4. Adjacent channel leakage ratio 1 vs. output power
-40
-45 1920 MHz
1950 MHz
-50 1980 MHz
-55
-60
-65
-70
-10
-5
0
5 10 15 20 25 30
Pout (dBm)
Figure 5. Adjacent channel leakage ratio 2 vs. output power
5
5 Page 
Calibration
Average Current & Talk Time
Calibration procedure is shown in Figure 21. Cool PAM re-
quires two calibration tables for high mode and low mode
respectively.This is due to gain difference in each mode.
For continuous output power at the points of mode
change, the input power should be adjusted according
to gain step during the mode change .
Offset Value
(Difference between Rising Point and Falling Point)
Offset value, which is the difference between the rising
point (output power where PA mode changes from low
mode to high mode) and falling point (output power
where PA mode changes from high mode to low mode),
should be set to prevent system oscillation. 3 to 5 dB is
recommended for Hysteresis.
Probability Distribution Function implies that what is
important for longer talk time is the efficiency of low or
medium power range rather than the efficiency at full
power. WS2512-TR1G idle current is 13 mA and operat-
ing current at 16 dBm is 54 mA at nominal condition.
Average current calculated with CDMA PDF is 26 mA in
urban area and 43 mA in suburban area for 2-mode
control. Average current can be reduced with 3-mode
control, which results in 22 mA in urban area and 38 mA
in suburban area. This PA with low current consumption
prolongs talk time by no less than 30 minutes compared
to other PAs.
Average currrent = ∫(PDF x Current)dp
TX_AGC
Low Mode
High Mode
Falling Rising
Min. PWR
Pout
Max. PWR
Figure 21. Calibration procedure
GAIN
Low Mode
Falling
High Mode
Rising
Pout
Figure 22. Setting of offset between rising and falling power
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0
-50
CDG Urban
CDG Suburban
-40 -30
Conventional PAM
-20 -10
0
PA Out (dBm)
10
Digitally Controlled PAM
700
600
500
400
300
200
100
0
20 30
Cool PAM
Figure 23. CDMA power distribution function
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet WS2512-TR1G.PDF ] | |
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