WS2411-TR1 Avago Technologies US Inc., WS2411-TR1 Datasheet - Page 12

• Manufacturer Part Number: WS2411-TR1
• Description: MODULE PA UMTS1900 4X4MM 10-PIN
• Manufacturer: Avago Technologies US Inc.
• Type: Power Amplifierr

Specifications of WS2411-TR1

• Package / Case: 10-DFN
• Current - Supply: 500mA ~ 550mA
• Frequency: 1.85GHz ~ 1.91GHz
• Gain: 24dB ~ 27dB
• Rf Type: W-CDMA, HSPDA
• Voltage - Supply: 3.2V ~ 4.2V
• Operating Frequency: 1910 MHz
• Operating Supply Voltage: 4.2 V
• Supply Current: 550 mA
• Maximum Operating Temperature: + 90 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 20 C
• Number Of Channels: 1 Channel
• Frequency (max): 1.91GHz
• Power Supply Requirement: Dual
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Package Type: SMD
• Dual Supply Voltage (min): 3.2/3.2V
• Dual Supply Voltage (typ): 3.4V
• Dual Supply Voltage (max): 4.2V
• 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.
Figure 22. Calibration procedure.
Min PWR
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
-50
High mode
Conv PAM
-40
Max PWR
Figure 24. CDMA Power Distribution Function.
CDG Urban
CDG Suburban
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.
Pout
-30
-20
Digitally Controlled PAM
PA Out (dBm)
-10
0
Gain
Figure 23. Setting of offset between rising and
falling power.
10
Low Mode
Average Current and Talk Time
Probability Distribution Function
implies that what is important
for longer talk time is the effi-
ciency of low or medium power
range rather than the efficiency
at full power. WS2411 idle
current is 13 mA and operating
current at 16 dBm is 54 mA at
nominal condition. Average
current calculated with CDMA
PDF is 29 mA in urban area and
56 mA in suburban area for
2-mode control. Average current
can be reduced with 3-mode
control, which results in 24 mA
in urban area and 51mA 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
20
Falling
Cool PAM
30
100
300
700
600
500
400
200
0
Rising
High Mode
Pout