WS2512-BLK Avago Technologies US Inc., WS2512-BLK Datasheet - Page 11

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

Specifications of WS2512-BLK

• 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

Calibration
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.
TX_AGC
Figure 21. Calibration procedure
Figure 23. CDMA power distribution function
11
Min. PWR
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
Low Mode
0
-50
Conventional PAM
Falling Rising
-40
CDG Urban
CDG Suburban
-30
High Mode
Max. PWR
-20
PA Out (dBm)
Digitally Controlled PAM
-10
Pout
0
10
20
Cool PAM
Average Current & Talk Time
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.
Figure 22. Setting of offset between rising and falling power
GAIN
Low Mode
30
700
600
500
400
300
200
100
0
Average currrent = (PDF x Current)dp
Falling
Rising
High Mode
Pout