WS2512-TR1 Avago Technologies US Inc., WS2512-TR1 Datasheet - Page 12

• Manufacturer Part Number: WS2512-TR1
• Description: MODULE PA UMTS2100 4X4MM 10-PIN
• Manufacturer: Avago Technologies US Inc.
• Type: Power Amplifierr

Specifications of WS2512-TR1

• Package / Case: 10-DFN
• Current - Supply: 465mA ~ 510mA
• Frequency: 1.92GHz ~ 1.98GHz
• Gain: 23.5dB ~ 26.5dB
• Rf Type: W-CDMA, HSPDA
• Voltage - Supply: 3.2V ~ 4.2V
• Operating Frequency: 1980 MHz
• Operating Supply Voltage: 4.2 V
• Supply Current: 510 mA
• Maximum Operating Temperature: + 90 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 20 C
• Number Of Channels: 1 Channel
• Frequency (max): 1.98GHz
• Power Supply Requirement: Single
• Single Supply Voltage (min): 3.2V
• Single Supply Voltage (typ): 3.4V
• Single Supply Voltage (max): 4.2V
• Package Type: SMD
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temperature Classification: Commercial
• Operating Temp Range: -20C to 90C
• Pin Count: 10
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Noise Figure: -
• P1db: -
• Test Frequency: -
• Lead Free Status / Rohs Status: Compliant

12
Calibration
Calibration procedure is shown
in Figure 22. CoolPAM requires
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.
Min PWR
Figure 22. Calibration procedure.
TX AGC
Low mode
Falling
Rising
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
High mode
-50
Max PWR
Conv PAM
-40
Pout
Figure 24. CDMA Power Distribution Function.
Offset Value
(difference between
rising point and falling point)
Offset value, which is the differ-
ence 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 recom-
mended for Hysteresis.
CDG Urban
CDG Suburban
-30
-20
Digitally Controlled PAM
PA Out (dBm)
-10
0
Gain
Figure 23. Setting of offset between rising and
falling power.
Low Mode
10
Average Current & Talk Time
tion implies that what is impor-
tant for longer talk time is the
efficiency of low or medium
power range rather than the
efficiency at full power. WS2512
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 20 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 current = ∫(PDF x Current)dp
Probability Distribution Func-
Falling
20
Cool PAM
30
Rising
100
300
700
600
500
400
200
0
High Mode
Pout