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DATA SHEET
SKY77324: 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 The SKY77324 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, impedance-matching circuitry for 50 input and output impedances, and a Power Amplifier Control (PAC) block with an internal current-sense resistor. The custom CMOS 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 SKY77324 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 SKY77324 also contains band-select 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, and process. The PAC ENABLE input allows initial turn-on of PAC circuitry to minimize battery drain.
Features
* Low input power range 0 to 6 dBm * High efficiency - GSM850 49% - GSM900 53% - DCS 53% - PCS 53% * Internal ICC sense resistor for PAC * Closed loop iPAC or open loop operation with external PAC circuit * Input/Output matching 50 internal (with DC blocking) * 22-pin package - Small outline 6 mm x 8 mm - Low profile 1.2 mm maximum * Low APC current 20 A * Gold plated, lead-free contacts
Figure 1. Functional Block Diagram
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Electrical Specifications
The following tables list the electrical characteristics of the SKY77324 Power Amplifier Module. Table 1 lists the absolute maximum ratings and Table 2 shows the recommended operating conditions. Table 3 lists the electrical characteristics of the SKY77324 for modes GSM850, GSM900, DCS1800, and PCS1900. Figure 2 is a diagram of a typical SKY77324 application. The SKY77324 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.
Table 1. Absolute Maximum Ratings
Parameter Input Power (PIN) Supply Voltage (VCC), Standby, VAPC 0.3 V, PAC 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)
(1)
Minimum 2.9 0 -20 -20 -20 -20
Typical 3.5 -- -- -- -- --
Maximum 4.8V
(1)
Unit V A
2.5 (1) +100 +100 +85 +85
C
In open loop operation: For charging conditions with VCC > 4.8 V, derate ICC linearly down to 0.5 A, maximum, at VCC = 5.5 V.
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Table 3. SKY77324 Electrical Specifications (1) (1 of 9)
Parameter Symbol Test Condition General Supply voltage Power control impedance PAC ENABLE control voltage PAC 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 0.3 V PAC ENABLE 0.2 V TCASE = +25 C PIN -60 dBm -- -- -- VPE 3.0 V -- -- -- -- -- -- 2.9 85 -0.1 2.0 -- -0.1 2.0 -- 3.5 100 -- -- -- -- -- -- 4.8 115 0.7 VCC 30 0.5 VCC 30 A A V V k V Min. Typ. Max. Units
Standby Mode Leakage current
IQ
--
2.5
10
A
Closed Loop VAPC Input Filter Bandwidth Closed Loop VAPC Threshold Open Loop (4) VAPC Enable Threshold
VAPC FBW VAPC THCL VAPC THOL
95 400 200
135 420 --
170 460 800
kHz mV mV
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77324 Electrical Specifications (1) (2 of 9)
Parameter Symbol Test Condition Min. Typ. Max. Units
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 PAC 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 PAC ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V PAC 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 = 0.3 V PAC ENABLE 0.2 V PIN = 6 dBm VAPC 0.35 V PAC ENABLE 2.0V Time from POUT = -10 dBm to within 0.5 dBm of POUT = +6.5 dBm Open Loop(4) Switching time RISE Time from POUT = -10 dBm to within 0.5 dBm of POUT = +20.0 dBm Time from POUT = -10 dBm to within 0.5 dBm of POUT = +34.5 dBm 824 0 0.4 -- -- -- 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
POUT MAX LOW VOLTAGE Output power
32.0
34.0
-- dBm
POUT MAX HIGH VOLTAGE
32.0
35.7
--
Input VSWR
IN POUT STANDBY
-- --
1.5:1 -40
2.0:1 -35
--
Forward isolation POUT ENABLED -- -30 -16
dBm
-- -- --
1.2 1.0 1.4
2.0 1.3 1.7 s
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DATA SHEET * SKY77324
Table 3. SKY77324 Electrical Specifications (1) (3 of 9)
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 (5) (Control level 5-15) 3.2 VCC 4.5 Power control variation (5) (Control level 16-19) Power control slope Closed loop bandwidth Loop phase margin fO 2fO 3fO PCDR PCV -- POUT +14.5 to +34.5 dBm, +25 C POUT +14.5 to +34.5 dBm PCV PCS BCL PM POUT +6.5 to +12.5 dBm, +25 C POUT +6.5 to +12.5 dBm 6.5 to 34.5 dBm VAPC = 1.0 V VAPC = 1.0 V Measured at the DCS/PCS output -15 dBm POUT 34.5 dBm Min. Typ. Max. 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
-- -- -- 30 -0.8 -1.5 -1.2 -2.0 2 -- 50
-8 -30 -30 50 -- -- -- -- -- 700 65
0 -20 -20 dB +0.8 +1.4 +1.2 +2.0 300 -- -- dB/V kHz deg. dB dB dBm
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77324 Electrical Specifications (1) (4 of 9)
Parameter Symbol Test Condition Min. Typ. Max. 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 PAC 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 PAC ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V PAC 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 = 0.3 V PAC ENABLE 0.2 V PIN = 6 dBm VAPC 0.35 V PAC ENABLE 2.0 V Time from POUT = -10 dBm to within 0.5 dBm of POUT = +6.5 dBm Open Loop(4) Switching time RISE Time from POUT = -10 dBm to within 0.5 dBm of POUT = +20.0 dBm Time from POUT = -10 dBm to within 0.5 dBm of POUT = +34.5 dBm -- -- -- 880 0 0.4 -- -- -- 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 POUT STANDBY
-- --
1.5:1 -40
2.0:1 -35
--
Forward isolation POUT ENABLED
dBm -- -30 -16
-- -- --
1.2 1.0 1.4
2.0 1.3 1.7 s
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DATA SHEET * SKY77324
Table 3. SKY77324 Electrical Specifications (1) (5 of 9)
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 (5) (Control level 5-15) 3.2 VCC 4.5 Power control variation (5) (Control level 16-19) Power control slope Closed loop bandwidth Loop phase margin fO 2fO 3fO PCDR PCV -- POUT +14.5 to +34.5 dBm, +25 C POUT +14.5 to +34.5 dBm PCV PCS BCL PM POUT +6.5 to +12.5 dBm, +25 C POUT +6.5 to +12.5 dBm 6.5 to 34.5 dBm VAPC = 1.0 V VAPC = 1.0 V Measured at the DCS/PCS output, -15 dBm POUT 34.5 dBm Min. Typ. Max. 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
-- -- -- 30 -0.8 -1.5 -1.2 -2.0 2 -- 50
-12 -30 -30 50 -- -- -- -- -- 700 65
0 -20 -20 -- +0.8 +1.4 +1.2 +2.0 300 -- -- dB/V kHz deg. dB dB dB dBm
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77324 Electrical Specifications (1) (6 of 9)
Parameter Symbol Test Condition Min. Typ. Max. 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 PAC ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C VCC = 3.5 V POUT = 32.0 dBm PAC 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 PAC ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V PAC 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 = 0.3 V PAC ENABLE 0.2 V PIN = 6 dBm VAPC 0.35 V PAC ENABLE 2.0 V -- -- -- 1710 0 0.4 -- -- -- 1785 6 2.1 MHz dBm V
PAE
45
53
--
Power Added Efficiency
%
PAE LOW 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 POUT STANDBY
-- --
1.5:1 -40
2.0:1 -35
--
Forward isolation POUT ENABLED
dBm -- -40 -20
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DATA SHEET * SKY77324
Table 3. SKY77324 Electrical Specifications (1) (7 of 9)
Parameter Symbol Test Condition Time from POUT = -10 dBm to within 0.5 dBm of POUT = +1.5 dBm Open Loop (4) Switching time RISE Time from POUT = -10 dBm to within 0.5 dBm of POUT = +20.0 dBm Time from POUT = -10 dBm to within 0.5 dBm of POUT = +32.0 dBm 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 (Control level 0-8) 3.2 V VCC 4.5 V Power control variation (5) (Control level 9-13) Power control variation (5) (Control level 14-15) Power control slope Closed loop bandwidth Loop phase margin
(5)
Min. -- -- --
Typ. 0.5 0.8 1.2
Max. 3.0 1.1 1.5
Units
s
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 -1.6 -1.8 -3.3 -3.0 -4.5 -- -- 75
50 -- -- -- -- -- -- -- 500 --
-- +1.0 +1.6 +1.8 +3.3 +3.0 +4.5 400 -- --
dB dB
PCV
POUT +5.5 to +13.5 dBm, +25 C POUT +5.5 to +13.5 dBm
dB
PCV PCS BCL PM
POUT +1.5 to +3.5 dBm, +25 C POUT +1.5 to +3.5 dBm 1.5 to 32.0 dBm VAPC = 1.0 V VAPC = 1.0 V
dB dB/V kHz deg.
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Table 3. SKY77324 Electrical Specifications (1) (8 of 9)
Parameter Symbol Test Condition Min. Typ. Max. 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 PAC ENABLE > 2.0 V pulse width 577 s duty cycle 1:8 TCASE = +25 C VCC = 3.5 V POUT = 32.0 dBm PAC 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 PAC ENABLE > 2.0 V TCASE = -20 C to +100 C (See Table 2 for multislot.) PIN = 0 dBm VCC = 4.5 V PAC 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 = 0.3 V PAC ENABLE 0.2 V PIN = 6 dBm VAPC 0.35 V PAC ENABLE 2.0 V -- -- -- 1850 0 0.4 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 POUT STANDBY
-- --
1.5:1 -40
2.0:1 -35
--
Forward isolation POUT ENABLED
dBm -- -40 -20
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Table 3. SKY77324 Electrical Specifications (1) (9 of 9)
Parameter Symbol Test Condition Time from POUT = -10 dBm to within 0.5 dBm of POUT = +1.5 dBm Open Loop(4) Switching time RISE, FALL Time from POUT = -10 dBm to within 0.5 dBm of POUT = +20.0 dBm Time from POUT = -10 dBm to within 0.5 dBm of POUT = +32.0 dBm 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 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 (5) (Control level 9-13) Power control variation (5) (Control level 14-15) Power control slope Closed loop bandwidth Loop phase margin
(1)
Min. -- -- --
Typ. 0.5 0.8 1.2
Max. 3.0 1.1 1.5
Units
s
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 -1.6 -1.8 -3.3 -3.0 -4.5 -- -- 75
50 -- -- -- -- -- -- -- 500 --
-- +1.0 +1.6 +1.8 +3.3 +3.0 +4.5 400 -- --
dB dB
(5)
PCV
POUT +5.5 to +13.5 dBm, +25 C POUT +5.5 to +13.5 dBm
dB
PCV PCS BCL PM
POUT +1.5 to +3.5 dBm, +25 C POUT +1.5 to +3.5 dBm 1.5 to 32.0 dBm VAPC = 1.0 V VAPC = 1.0 V
dB dB/V kHz deg.
Unless specified otherwise: TCASE = -20 C to maximum 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. This device has an Open Loop mode that allows bypassing of the internal PAC circuitry. See the Technical Information section at end of this document for further information. 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) (5)
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 2. Typical SKY77324 PAM Application
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DATA SHEET * SKY77324
Package Dimensions and Pin Description
Figure 3 is a mechanical diagram of the pad layout for the SKY77324, 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 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.
Figure 3. SKY77324 PAM Package Dimensions--22-Pin Leadless (All Views)
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 4. Phone Board Layout Footprint for 6 x 8 mm Package - SKY77324 Specific
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Figure 5. SKY77324 PAM Pin Configuration--22-Pin Leadless (Top View)
Table 4. SKY77324 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) VCC1C PAC ENABLE VCC1A BS DCS/PCS IN GSM IN GND VCC1B GND GND GND GSM OUT GND GND RSVD GND DCS/PCS OUT GND VSENSE VBATT GND VAPC GND Name VCC (to PAC) Closed loop PAC mode CMOS 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 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 Reserved 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 IN CLOSED LOOP MODE.) 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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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 6. Typical Case Markings
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 SKY77324 is currently qualified for MSL3/240 C. Demonstration of the SKY77324 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.
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Electrostatic Discharge Sensitivity
The SKY77324 is a Class I device. Figure 7 lists the Electrostatic Discharge (ESD) immunity level for each pin of the SKY77324 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. 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.
Figure 7. ESD Sensitivity Areas (Top View)
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
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Technical Information
Closed loop control of the amplifier is enabled when PAC ENABLE is driven to logic high. The PA collector current will then be directly proportional to the VAPC input voltage over the range of 400 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. 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 SKY77324 PAM may be installed in a phone board. Figure 10 shows an example Skyworks software interface for the setup in Figure 9 that can be used to create a recommended DAC ramp profile. This profile is loaded from the computer into the Skyworks emulator board during test. The software also handles the required PAC Enable and TX_RX control signal timing. Figure 11 and Figure 12 show the GSM and DCS/PCS calibration screens, respectively, called up from the ramp profile interface in Figure 10. These calibrations, done for each PAM, generate an output power versus VAPC curve from sample data. Points from this curve are combined with the ramp coefficients to generate the DAC ramp during handset operation or test.
The SKY77324 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 SKY77324, 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 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
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Figure 8. Example of PAM Recommended Timing Diagram
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 9. PAM Evaluation Test Setup.
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Figure 10. Example of DAC Ramp Profile Generation.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
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DATA SHEET * SKY77324
iPACTM PAM FOR QUAD-BAND GSM / GPRS
Figure 11. Example of GSM Calibration Screen
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iPACTM PAM FOR QUAD-BAND GSM / GPRS
DATA SHEET * SKY77324
Figure 12. Example of DCS/PCS Calibration Screen
Open Loop Control Mode With PAC ENABLE at a logic low, the voltage applied to VAPC is buffered and applied directly to the bases of the RF devices. This mode of operation provides backward compatibility with the existing amplifier designs and allows for various test scenarios. As with previous designs, an active clamp acts as a protection mechanism limiting the maximum voltage that can be applied to the base of the RF devices. This clamp voltage decreases with increasing supply voltage. The enable threshold on the VAPC input for open loop operation exhibits a wide tolerance, which may vary from 200 mV to 800 mV. When enabled in Open Loop mode, the internal PAC circuitry (V-I converter and integrator) is placed in standby.
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Ordering Information
Model Number SKY77324 Manufacturing Part Number SKY77324 Package 6 x 8 x 1.2 mm Operating Temperature -20 C to +100 C
Revision History
Revision A B C Level Date September 18, 2003 September 29, 2003 January 7, 2004 Initial Release Revise: Table 3 Revise: Table 3 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: SKY77324 Evaluation Board Information, Document Number 103195 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 incorporated by reference.

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