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PRELIMINARY DATA SHEET
SKY77325: iPACTM PAM for Quad-Band GSM / GPRS
Applications
* Quad-band cellular handsets encompassing - Class 4 GSM850/900 - Class 1 DCS1800 PCS1900 - Class 12 GPRS multi-slot operation
Description
The SKY77325 Power Amplifier Module (PAM) is designed in a low profile (1.2 mm), compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation. The PAM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation. The module consists of separate GSM850/900 PA and DCS1800/PCS1900 PA blocks, impedancematching circuitry for 50 input and output impedances, and a Power Amplifier Control (PAC) block with an internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC function and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction Bipolar Transistor (HBT) PA block supports the GSM850/900 bands and the other supports the DCS1800 and PCS1900 bands. Both PA blocks share common power supply pins to distribute current. The GaAs die, the Silicon (Si) die, and the passive components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold. RF input and output ports of the SKY77325 are internally matched to a 50 load to reduce the number of external components for a quad-band design. Extremely low leakage current (2.5 A, typical) of the dual PA module maximizes handset standby time. The SKY77325 also contains bandselect switching circuitry to select GSM (logic 0) or DCS/PCS (logic 1) as determined from the Band Select (BS) signal. In Figure 1 below, the BS pin selects the PA output (DCS/PCS OUT or GSM850/900 OUT) and the Analog Power Control (VAPC) controls the level of output power. VBATT and VSENSE pins connect to an internal current-sense resistor and interface to an integrated power amplifier control (iPACTM) function, which is insensitive to variations in temperature, power supply, process, and input power. The ENABLE input allows initial turn-on of PAM circuitry to minimize battery drain.
Features
* Low input power range - 0 to 6 dBm * High efficiency - GSM850 49% - GSM900 53% - DCS 53% - PCS 53% * BiCMOS PA controller and interface IC - Low power control slope - Fast response time - Improved control accuracy * Integrated closed loop power amplifier control * Internal ICC sense resistor for PAC * Input/Output matching 50 internal (with DC blocking) * 22-pin package * Small outline - 6 mm x 8 mm * Low profile - 1.2 mm maximum * Gold plated, lead-free contacts
Figure 1. Functional Block Diagram
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
diagram of a typical SKY77325 application. The SKY77325 is a static-sensitive electronic device and should not be stored or operated near strong electrostatic fields. Detailed information on device dimensions, pin descriptions, packaging and handling can be found in later sections of this data sheet.
Electrical Specifications
The following tables list the electrical characteristics of the SKY77325 Power Amplifier Module. Table 1 lists the absolute maximum ratings and Table 2 shows the recommended operating conditions. lists the electrical characteristics of the SKY77325 for modes GSM850, GSM900, DCS1800, and PCS1900. Figure 2 is a
Table 1. Absolute Maximum Ratings
Parameter Input Power (PIN) Supply Voltage (VCC), Standby, VAPC 0.3 V, ENABLE 0.2 V Control Voltage (VAPC) Storage Temperature Minimum -- -- -0.5 -55 Maximum 15 7 VCC_MAX - 0.2 (See Table 3) +100 Unit dBm V V C
Table 2. Recommended Operating Conditions
Parameter Supply Voltage (VCC) Supply Current (ICC) Operating Case Temperature (TCASE) - Package Bottom Surface 1-Slot (12.5% duty cycle) 2-Slot (25.0% duty cycle) 3-Slot (37.5% duty cycle) 4-Slot (50.0% duty cycle) Minimum 2.9 0 -20 -20 -20 -20 Typical 3.5 -- -- -- -- -- Maximum 4.8V 2.5 +100 +100 +85 +85 Unit V A
C
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PRELIMINARY DATA SHEET * SKY77325
Table 3. SKY77325 Electrical Specifications (1) (1 of 8)
Parameter Symbol Test Condition General Supply voltage Power control impedance ENABLE control voltage ENABLE current Band Select control voltage Band Select current Low High Low High VCC ZAPC VPE VPE IPE VBS VBS IBS VBS 3.0 V VCC 4.5 V VAPC = 0.1 V ENABLE 0.2 V TCASE = +25 C PIN -60 dBm -- -- VPE 3.0 V -- -- -- -- -- -- 2.9 -- -0.1 1.2 -- -0.1 1.2 -- 3.5 200 -- -- -- -- -- -- 4.8 -- 0.6 VCC 30 0.6 VCC 30 A A V V k V Minimum Typical Maximum Units
Standby Mode Leakage current
IQ
--
2.5
10
A
VAPC Input Filter Bandwidth VAPC Threshold
VAPC FBW VAPC THCL
85 150
120 200
150 250
kHz mV
GSM850 Mode (f = 824 to 849 MHz and PIN = 0 to 6dBm) Frequency range Input power Analog power control voltage f PIN VAPC VCC = 3.5 V POUT = 34.5 dBm ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C BW = 3 MHz 6.5 dBm POUT 34.5 dBm VCC = 3.5 V TCASE = +25 C VCC = 2.9 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm POUT = 6.5 to 34.5 dBm, controlled by VAPC PIN = 6 dBm VAPC = 0.1 V ENABLE 0.2 V 824 0 0.2 -- -- -- 849 6 2.1 MHz dBm V
Power Added Efficiency
PAE
45
49
--
%
2nd to 13th harmonics
2fO to 13fO POUT
-- 34.5
-25 35.0
-10 --
dBm dBm
POUT MAX LOW VOLTAGE Output power
32.0
34.0
--
POUT MAX HIGH VOLTAGE
32.0
35.7
--
Input VSWR
IN
--
1.5:1
2.0:1
--
Forward isolation
POUT STANDBY
--
-40
-35
dBm
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77325 Electrical Specifications (1) (2 of 8)
Parameter Symbol Test Condition All combinations of the following parameters: VAPC = controlled (2) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 8:1, all phase angles All combinations of the following parameters: VAPC = controlled (2) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 10:1, all phase angles At fO + 20 MHz RBW = 100 kHz VCC = 3.5 V 6.5 dBm POUT 34.5 dBm TCASE = +25 C At fO + 10 MHz RBW = 100 kHz VCC = 3.5 V 6.5 dBm POUT 34.5 dBm TCASE = +25 C At 1805 to 1880 MHz RBW = 100 kHz VCC = 3.5 V 6.5 dBm POUT 34.5 dBm TCASE = +25 C Coupling of Fundamental, 2nd, and 3rd harmonics from the GSM band into the DCS/PCS band Power control dynamic range Power control variation (Control level 5-15) 3.2 VCC 4.5 Power control variation (4) (Control level 16-19) Power control slope
(4)
Minimum
Typical
Maximum
Units
Spurious
Spur
No parasitic oscillation > -36 dBm
Load mismatch
Load
No module damage or permanent degradation
--
-84
-82
dBm
Noise power
PNOISE
--
-81
-76
dBm
--
-106
-84
dBm
fO 2fO 3fO PCDR PCV -- POUT +14.5 to +34.5 dBm, +25 C POUT +14.5 to +34.5 dBm PCV PCS POUT +6.5 to +12.5 dBm, +25 C POUT +6.5 to +12.5 dBm 6.5 to 34.5 dBm Measured at the DCS/PCS output -15 dBm POUT 34.5 dBm
-- -- -- 30 -0.8 -1.2 -0.9 -1.3 --
-8 -30 -30 50 -- -- -- -- --
0 -20 -20 dB +0.8 +1.2 +0.9 +1.3 150 dB/V dB dB dBm
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PRELIMINARY DATA SHEET * SKY77325
Table 3. SKY77325 Electrical Specifications (1) (3 of 8)
Parameter Symbol Test Condition Minimum Typical Maximum Units
GSM900 Mode (f = 880 to 915 MHz and PIN = 0 to 6 dBm) Frequency range Input power Analog power control voltage f PIN VAPC -- -- -- VCC = 3.5 V POUT = 34.5 dBm ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C BW = 3 MHz 6.5 dBm POUT 34.5 dBm VCC = 3.5 V TCASE = +25 C VCC = 2.9 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm POUT = 6.5 to 34.5 dBm, controlled by VAPC PIN = 6 dBm VAPC = 0.1 V ENABLE 0.2 V 880 0 0.2 -- -- -- 915 6 2.1 MHz dBm V
Power Added Efficiency
PAE
49
53
--
%
2nd to 13th harmonics
2fO to 13fO POUT
-- 34.5
-30 35.0
-10 --
dBm
POUT MAX LOW VOLTAGE Output power
32.0
33.0
-- dBm
POUT MAX HIGH VOLTAGE
32.0
36.3
--
Input VSWR
IN
--
1.5:1
2.0:1
--
Forward isolation
POUT STANDBY
--
-40
-35
dBm
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77325 Electrical Specifications (1) (4 of 8)
Parameter Symbol Test Condition All combinations of the following parameters: VAPC = controlled (2) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 8:1, all phase angles All combinations of the following parameters: VAPC = controlled (2) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 10:1, all phase angles At fO + 20 MHz RBW = 100 kHz VCC = 3.5 V 6.5 dBm POUT 34.5 dBm TCASE = +25 C At fO + 10 MHz RBW = 100 kHz VCC = 3.5 V 6.5 dBm POUT 34.5 dBm TCASE = +25 C At 1805 to 1880 MHz RBW = 100 kHz VCC = 3.5 V 6.5 dBm POUT 34.5 dBm TCASE = +25 C Coupling of Fundamental, 2nd, and 3rd harmonics from the GSM band into the DCS/PCS band Power control dynamic range Power control variation (Control level 5-15) 3.2 VCC 4.5 Power control variation (4) (Control level 16-19) Power control slope
(4)
Minimum
Typical
Maximum
Units
Spurious
Spur
No parasitic oscillation > -36 dBm
Load mismatch
Load
No module damage or permanent degradation
--
-84
-82
Noise power
PNOISE
--
-81
-76
dBm
--
-106
-84
fO 2fO 3fO PCDR PCV -- POUT +14.5 to +34.5 dBm, +25 C POUT +14.5 to +34.5 dBm PCV PCS POUT +6.5 to +12.5 dBm, +25 C POUT +6.5 to +12.5 dBm 6.5 to 34.5 dBm Measured at the DCS/PCS output, -15 dBm POUT 34.5 dBm
-- -- -- 30 -0.8 -1.2 -0.9 -1.3 --
-12 -30 -30 50 -- -- -- -- --
0 -20 -20 -- +0.8 +1.2 +0.9 +1.3 150 dB/V dB dB dB dBm
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PRELIMINARY DATA SHEET * SKY77325
Table 3. SKY77325 Electrical Specifications (1) (5 of 8)
Parameter Symbol Test Condition Minimum Typical Maximum Units DCS1800 Mode (f = 1710 to 1785 MHz and PIN = 0 to 6 dBm) Frequency range Input power Analog power control voltage f PIN VAPC -- -- -- VCC = 3.5 V POUT = 32.0 dBm ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C VCC = 3.5 V POUT = 32.0 dBm ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C PIN = -2 dBm BW = 3 MHz 1.5 dBm POUT 32.0 dBm VCC = 3.5 V TCASE = +25 C VCC = 3.5 V TCASE = +25 C PIN = -2 dBm VCC = 2.9 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm POUT = 1.5 to 32.0 dBm, controlled by VAPC 1710 0 0.2 -- -- -- 1785 6 2.1 MHz dBm V
PAE
45
53
--
Power Added Efficiency
%
PAELOW INPUT
--
51
--
2nd to 7th harmonics
2fO to 7fO POUT
-- 32.0
-22 33.0
-10 --
dBm
POUT MAX LOW INPUT
--
32.1
--
Output power
POUT MAX LOW VOLTAGE
29.0
31.0
--
dBm
POUT MAX HIGH VOLTAGE
29.0
34.3
--
Input VSWR
IN
--
1.5:1
2.0:1
--
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77325 Electrical Specifications (1) (6 of 8)
Parameter Forward isolation Symbol POUT STANDBY Test Condition PIN = 6 dBm VAPC = 0.1 V ENABLE 0.2 V All combinations of the following parameters: VAPC = controlled (3) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 8:1, all phase angles All combinations of the following parameters: VAPC = controlled (3) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 10:1, all phase angles At fO + 20 MHz RBW = 100 kHz VCC = 3.5 V 1.5 dBm POUT 32.0 dBm TCASE = +25 C At 925 to 960 MHz RBW = 100 kHz VCC = 3.5 V 1.5 dBm POUT 32.0 dBm TCASE = +25 C Power control dynamic range Power control variation (4) (Control level 0-8) 3.2 V VCC 4.5 V Power control variation (4) (Control level 9-13) Power control variation (4) (Control level 14-15) Power control slope PCDR PCV -- POUT +15.5 to +32.0 dBm, +25 C POUT +15.5 to +32.0 dBm PCV POUT +5.5 to +13.5 dBm, +25 C POUT +5.5 to +13.5 dBm PCV PCS POUT +1.5 to +3.5 dBm, +25 C POUT +1.5 to +3.5 dBm 1.5 to 32.0 dBm Minimum -- Typical -40 Maximum -35 Units dBm
Spurious
Spur
No parasitic oscillation > -36 dBm
Load mismatch
Load
No module damage or permanent degradation
--
-82
-80 dBm
Noise power
PNOISE
--
-97
-87
35 -1.0 -1.4 -1.3 -1.6 -1.7 -2.2 --
50 -- -- -- -- -- -- --
-- +1.0 +1.4 +1.3 +1.6 +1.7 +2.2 150
dB dB
dB
dB dB/V
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PRELIMINARY DATA SHEET * SKY77325
Table 3. SKY77325 Electrical Specifications (1) (7 of 8)
Parameter Symbol Test Condition Minimum Typical Maximum Units PCS1900 Mode (f = 1850 to 1910 MHz and PIN = 0 to 6 dBm) Frequency range Input power Analog power control voltage F PIN VAPC -- -- -- VCC = 3.5 V POUT = 32.0 dBm ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C VCC = 3.5 V POUT = 32.0 dBm ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C PIN = -2 dBm BW = 3 MHz 1.5 dBm POUT 32.0 dBm VCC = 3.5 V TCASE = +25 C VCC = 3.5 V TCASE = +25 C PIN = -2 dBm VCC = 2.9 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm POUT = 1.5 to 32.0 dBm, controlled by VAPC PIN = 6 dBm VAPC = 0.1 V ENABLE 0.2 V 1850 0 0.2 1910 6 2.1 MHz dBm V
PAE
45
53
--
Power Added Efficiency
%
PAELOW INPUT
--
51
--
2nd to 7th harmonics
2fO to 7fO POUT
-- 32.0
-18 33.0
-10 --
dBm
POUT MAX LOW INPUT
--
32.5
--
Output power
POUT MAX LOW VOLTAGE
29.0
31.0
--
dBm
POUT MAX HIGH VOLTAGE
29.0
34.1
--
Input VSWR
IN
--
1.5:1
2.0:1
--
Forward isolation
POUT STANDBY
--
-40
-35
dBm
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77325 Electrical Specifications (1) (8 of 8)
Parameter Symbol Test Condition All combinations of the following parameters: VAPC = controlled (3) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 8:1, phase angles All combinations of the following parameters: VAPC = controlled (3) PIN = min. to max. VCC = 2.9 V to 4.8 V Load VSWR = 10:1, all phase angles At fO + 20 MHz RBW = 100 kHz VCC = 3.5 V 1.5 dBm POUT 32.0 dBm TCASE = +25 C At 869 to 894 MHz RBW = 100 kHz VCC = 3.5 V 1.5 dBm POUT 32.0 dBm TCASE = +25 C Power control dynamic range Power control variation (Control level 0-8) 3.2 V VCC 4.5 V Power control variation (4) (Control level 9-13) Power control variation (4) (Control level 14-15) Power control slope
(1)
Minimum
Typical
Maximum
Units
Spurious
Spur
No parasitic oscillation > -36 dBm
Load mismatch
Load
No module damage or permanent degradation
--
-82
-80 dBm
Noise power
PNOISE
--
-97
-87
PCDR PCV
-- POUT +15.5 to +32.0 dBm, +25 C POUT +15.5 to +32.0 dBm
35 -1.0 -1.4 -1.3 -1.6 -1.7 -2.2 --
50 -- -- -- -- -- -- --
-- +1.0 +1.4 +1.3 +1.6 +1.7 +2.2 150
dB dB
(4)
PCV
POUT +5.5 to +13.5 dBm, +25 C POUT +5.5 to +13.5 dBm
dB
PCV PCS
POUT +1.5 to +3.5 dBm, +25 C POUT +1.5 to +3.5 dBm 1.5 to 32.0 dBm
dB dB/V
Unless specified otherwise: TCASE = -20 C to max. operating temperature (see Table 2) RL = 50 pulsed operation with pulse width 1154 s and duty cycle 2:8 VCC = 2.9 V to 4.8 V. ICC = 0A to xA, where x = current at POUT = 34.5 dBm, 50 load, and VCC = 3.5 V. ICC = 0A to xA, where x = current at POUT = 32.0 dBm, 50 load, and VCC = 3.5 V. Power control variation is measured by comparing power obtained at a specified control voltage over all conditions, against the power obtained with the same control voltage at nominal conditions. For this module, nominal conditions are defined as: T = 25 C VCC = 3.5 V PIN = 3 dBm Frequency = mid-band
(2) (3) (4)
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PRELIMINARY DATA SHEET * SKY77325
Figure 2. Typical SKY77325 PAM Application
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
terminals. Figure 5 shows the device pin configuration and Table 4 lists the pin names and signal descriptions. The pin numbering convention starts with pin 1 at the upper left, as indicated in Figure 5, and increments counter-clockwise around the package. Figure 6 interprets typical case markings.
Package Dimensions and Pin Description
Figure 3 is a mechanical diagram of the pad layout for the SKY77325, a 22-pin leadless quad-band PA module. Figure 4 provides a recommended phone board layout footprint for the PAM to help the designer attain optimum thermal conductivity, good grounding, and minimum RF discontinuity for the 50 ohm
Figure 3. SKY77325 PAM Package Dimensions--22-Pin Leadless (All Views)
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PRELIMINARY DATA SHEET * SKY77325
Figure 4. Phone Board Layout Footprint for 6 x 8 mm Package
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 5. SKY77325 PAM Pin Configuration--22-Pin Leadless (Top View)
Figure 6. Typical Case Markings
Table 4. SKY77325 Pin Names and Signal Descriptions
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 GND PAD (23) NC ENABLE VCC1A BS DCS/PCS IN GSM850/900 IN GND VCC1B GND GND GND GSM850/900 OUT GND GND GND GND DCS/PCS OUT GND VSENSE VBATT GND VAPC GND Name NO INTERNAL CONNECTION BiCMOS enable VCC (to GSM 1st stage, DCS 1st stages) Band Select RF input 1710-1910 MHz RF input 824-915 MHz RF and DC Ground VCC (to BiCMOS PAC, GSM 2nd stage, DCS 2nd stage) RF and DC Ground RF and DC Ground RF and DC Ground RF Output 824-915 MHz RF and DC Ground RF and DC Ground RF and DC Ground RF and DC Ground RF Output 1710-1910 MHz RF and DC Ground Voltage output of low side of internal sense resistor (DO NOT CONNECT.) Battery input to high side of internal sense resistor RF and DC Ground Power Control Bias Voltage Ground Pad, bottom Description
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
PRELIMINARY DATA SHEET * SKY77325
ESD testing was performed in compliance with MIL-STD-883E Method 3015.7 using the Human Body Model. If the magnitude of ESD damage threshold is found to consistently exceed 2000 volts, this so is indicated. If the ESD damage threshold below 2000 volts is measured for either polarity, numbers are indicated that represent worst case values observed in product characterization.
Package and Handling Information
Because of its sensitivity to moisture absorption, this device package is baked and vacuum-packed prior to shipment. Instructions on the shipping container label must be followed regarding exposure to moisture after the container seal is broken, otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SKY77325 is currently qualified for MSL3/240 C. Demonstration of the SKY77325 to withstand an MSL3/250 C solder reflow is pending completion of qualification tests. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. If the part is attached in a reflow oven, the temperature ramp rate should not exceed 5 C per second; maximum temperature should not exceed 250 C. If the part is manually attached, precaution should be taken to insure that the part is not subjected to temperatures exceeding 250 C for more than 10 seconds. For details on attachment techniques, precautions, and handling procedures recommended by Skyworks, please refer to Application Note: PCB Design and SMT Assembly/Rework, Document Number 101752. Additional information on standard SMT reflow profiles can also be found in the JEDEC Standard J- STD-020B. Production quantities of this product are shipped in the standard tape-and-reel format. For packaging details, refer to Application Note: Tape and Reel, Document Number 101568.
Figure 7. ESD Sensitivity Areas (Top View)
Electrostatic Discharge Sensitivity
The SKY77325 is a Class I device. Figure 7 lists the Electrostatic Discharge (ESD) immunity level for each pin of the SKY77325 module. The numbers specify the ESD threshold levels for each pin where the I-V curve between the pin and ground starts to show degradation.
Various failure criteria can be utilized when performing ESD testing. Many vendors employ relaxed ESD failure standards, which fail devices only after "the pin fails the electrical specification limits" or "the pin becomes completely nonfunctional". Skyworks' most stringent criteria fail devices as soon as the pin begins to show any degradation on a curve tracer. To avoid ESD damage, both latent and visible, it is very important that the product assembly and test areas follow the Class-1 ESD handling precautions listed in Table 5.
Table 5. Precautions for Handling GaAs IC based Products to Avoid ESD Induced Damage
Personnel Grounding Wrist Straps Conductive Smocks, Gloves and Finger Cots Antistatic ID Badges Protective Workstation Dissipative Table Tops Protective Test Equipment (Properly Grounded) Grounded Tip Soldering Irons Conductive Solder Suckers Static Sensors Facility Relative Humidity Control and Air Ionizers Dissipative Floors (less than 109 to GND) Protective Packaging & Transportation Bags and Pouches (Faraday Shield) Protective Tote Boxes (Conductive Static Shielding) Protective Trays Grounded Carts Protective Work Order Holders
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
acceptable spectral limits at specified offset frequencies. The VAPC input has an internal reconstruction filter such that external resistors or capacitors are unnecessary on the phone board or the test fixture. Figure 8 represents the dynamic characteristics of the RF output burst power that results from the ramp profile delivered by the DAC to the VAPC input. The transmit power must not exceed the given limits at the time specified relative to the start and end of the data burst. Additional requirements are placed on spectral components generated by switching transients. Ramping at high rates will result in components that violate these spectral limits. A ramp control signal must be applied to the VAPC pin, which results in the desired power ramp response. The log relationship of VAPC to POUT, along with the finite bandwidth and potential slew rate limitations of the feedback loop, results in a complex mapping of the ramp profile to the actual output power. Careful attention is required in generating the input waveform which results in the desired output response. Figure 9 shows an example of the Skyworks PAM test setup for evaluation of RF performance with various ramp profiles. The user's test setup may also include a TX/RX switch and a diplexer in the output signal path. Alternatively, the SKY77325 PAM may be installed in a phone board.
Technical Information
Closed loop control of the amplifier is enabled when ENABLE is driven to logic high. The PA collector current will then be directly proportional to the VAPC input voltage over the range of 200 mV to 2.1 V. To meet the GSM power versus time mask and switching transient requirements the PAM must be provided with a DAC ramp profile on the VAPC input as well as proper timing on digital controls for the PAC circuitry. Note: Please refer to 3GPP TS 51.010-1: Mobile Station (MS) conformance specification. All GSM specifications are now the responsibility of 3GPP. The standards are available at http://www.3GPP.org.
The SKY77325 has been designed to comply with interface requirements and DAC resolution of leading base band devices. The ramp profile typically consists of a pedestal voltage, 10-16 discrete voltage steps on the rising edge of the burst, a constant region, 10-16 steps on the falling edge, and a final voltage. Typically, the user defines the start, stop, and 10-16 percentage values for each rising and falling edge, which are then applied as discrete voltages at the VAPC input. For the SKY77325, generally the same profile, scaled in amplitude, is used for all frequencies and power control levels. The ultimate purpose is to keep the RF output power ramp within the time mask and to maintain
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 16
May 14, 2004 * Skyworks Proprietary and Confidential Information. * Products and product information are subject to change without notice. * 103196P5
iPACTM PAM FOR QUAD-BAND GSM / GPRS
PRELIMINARY DATA SHEET * SKY77325
Figure 8. Example of PAM Recommended Timing Diagram
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
103196P5 * Skyworks Proprietary and Confidential Information. * Products and product information are subject to change without notice. * May 14, 2004
17
PRELIMINARY DATA SHEET * SKY77325
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 9. PAM Evaluation Test Setup.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 18
May 14, 2004 * Skyworks Proprietary and Confidential Information. * Products and product information are subject to change without notice. * 103196P5
Ordering Information
Model Number SKY77325 Manufacturing Part Number SKY77325 Package 6 x 8 x 1.2 mm Operating Temperature -20 C to +100 C
Revision History
Revision P1 P2 P3 P4 P5 Level Date November 3, 2003 November 26, 2003 January 6, 2004 January 21, 2004 May 14, 2004 Preliminary Information Revise: Table 3 Revise: Tables 3, 4; Figures 2, 5, 7 Delete: Pg 16, last two paragraphs; Figures 10, 11, 12 Revise: Table 3 Revise: Figure 8 Description
References
Application Note: Tape and Reel, Document Number 101568 Application Note: PCB Design and SMT Assembly/Rework, Document Number 101752 Application Brief: iPACTM GSM Transmitter Timing, Calibration and Baseband Control, Document Number 103138 Application Note: iPACTM Peak Output Power Calibration, Document Number 103180 User Guide: iPACTM Test and Control - Baseband Emulator Interface, Document Number 103125 JEDEC Standard J-STD-020B 3GPP TS 51.010-1; Mobile Station (MS) Conformance Specification (http://www.3GPP.org)
(c) 2003, 2004, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products. These materials are provided by Skyworks as a service to its customers and may be used for informational purposes only. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its products, specifications and product descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from future changes to its products and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as may be provided in Skyworks' Terms and Conditions of Sale for such products, Skyworks assumes no liability whatsoever. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF SKYWORKSTM PRODUCTS INCLUDING WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. SKYWORKS FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THESE MATERIALS. SkyworksTM products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks' customers using or selling SkyworksTM products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. The following are trademarks of Skyworks Solutions, Inc.: SkyworksTM, the Skyworks symbol, and "Breakthrough Simplicity"TM. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. Additional information, posted at www.skyworksinc.com, is 336incorporated by reference.

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