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DATA SHEET
SKY77328 iPAC™ 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 SKY77328 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 Ω 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 SKY77328 are internally matched to a 50 Ω load to reduce the number of external components for a quad-band design. Extremely low leakage current (2.5 μA, typical) of the dual PA module maximizes handset standby time. The SKY77328 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. The VBATT pin connects to an internal current-sense resistor and interfaces to an integrated power amplifier control (iPAC™) 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 56% - GSM900 56% - DCS 54% - 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 Ω internal (with DC blocking) • 20-pin package • Small outline - 6 mm x 6 mm • Low profile - 1.2 mm maximum • Gold plated, lead-free contacts • MSL3/250 °C
Figure 1. Functional Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 •
[email protected] • www.skyworksinc.com
103237A • Skyworks Proprietary and Confidential Information • Products and product information are subject to change without notice. • March 17, 2009
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DATA SHEET
SKY77328 iPAC™ PAM FOR QUAD-BAND GSM / GPRS
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Electrical Specifications
The following tables list the electrical characteristics of the SKY77328 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
SKY77328 for modes GSM850, GSM900, DCS1800, and PCS1900. Figure 2 is a diagram of a typical SKY77328 application. The SKY77328 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, ENABLE ≤ 0.2 V Control Voltage (VAPC) Storage Temperature Minimum — — Maximum 15 7 Unit dBm V
–0.5 –55
VCC_MAX – 0.2 (See Table 3) +150
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 4.8 2.5 +100 +100 +85 +85 Unit V A °C
Table 3. SKY77328 Electrical Specifications 1 (1 of 9)
General Parameter Supply Voltage Power Control Impedance ENABLE Control Voltage Low High ENABLE current Band Select Control Voltage Low High Band Select Current Standby Mode Leakage Current IBS IQ VBS ≤ 3.0 V VCC ≤ 4.5 V VAPC = 0.1 V ENABLE ≤ 0.2 V TCASE = +25 °C PIN ≤ –60 dBm — — IPE VBS VPE ≤ 3.0 V — — VCC ZAPC VPE Symbol Test Condition — — — — Minimum 2.9 — –0.1 1.2 — –0.1 1.2 — — Typical 3.5 200 — — — — — — 2.5 Maximum 4.8 — 0.6 VCC 30 0.6 VCC 30 10 μA μA μA V Units V kΩ V
VAPC Input Filter Bandwidth VAPC Threshold
VAPC FBW VAPC THCL
85 100
120 150
150 200
kHz mV
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 •
[email protected] • www.skywor.