WS2111-TR1 Avago Technologies US Inc., WS2111-TR1 Datasheet - Page 12
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WS2111-TR1
Manufacturer Part Number
WS2111-TR1
Description
MODULE PA UMTS850 4X4MM 10-PIN
Manufacturer
Avago Technologies US Inc.
Type
Power Amplifierr
Datasheet
1.WS2111-BLK.pdf
(20 pages)
Specifications of WS2111-TR1
Package / Case
10-DFN
Current - Supply
475mA
Frequency
824MHz ~ 849MHz
Gain
25dB ~ 28dB
Rf Type
W-CDMA, HSPDA
Voltage - Supply
3.2V ~ 4.2V
Operating Frequency
849 MHz
Operating Supply Voltage
4.2 V
Supply Current
475 mA
Maximum Operating Temperature
+ 90 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 20 C
Number Of Channels
1 Channel
Frequency (max)
849MHz
Output Power
28dBm
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
WS2111-TR1
Manufacturer:
AVAGO/安华高
Quantity:
20 000
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
Max PWR
-40
CDG Urban
CDG Suburban
Figure 24. CDMA Power Distribution Function.
Pout
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.
-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. WS2111 idle
current is 14 mA and operating
current at 16 dBm is 56 mA at
nominal condition. Average
current calculated with CDMA
PDF is 31 mA in urban area and
48 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 42 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
20
Falling
Cool PAM
30
100
300
700
600
500
400
200
0
Rising
High Mode
Pout