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PDF SKY77321 Data sheet ( Hoja de datos )
| Número de pieza | SKY77321 | |
| Descripción | PA Module | |
| Fabricantes | Skyworks Solutions | |
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ADVANCE PRODUCT SUMMARY
SKY77321: PA Module for Tri-Band EGSM / GPRS
Applications
• Tri-band cellular handsets
encompassing
- Class 4 EGSM900
- Class 1 DCS1800
PCS1900
- GPRS (up to Class 12)
multislot operation
Features
• High efficiency
- EGSM900 53%
- DCS1800 47%
- PCS1900 47%
• Input/output matching
- 50 Ω internal
• Small outline
- 6 mm x 6 mm
• Low profile
- 1.2 mm maximum
• Low APC current
- 10 µA typical
• Gold plated, lead-free
contacts
The SKY77321 Power Amplifier Module (PAM) is designed in a compact form factor for tri-band
cellular handsets comprising EGSM900, DCS1800, and PCS1900 operation. It also supports Class 12
General Packet Radio Service (GPRS) multislot operation.
The PAM consists of an EGSM900 PA block, a DCS1800/PCS1900 PA block, impedance-matching
circuitry for 50 Ω input and output, and bias control circuitry. Two separate Heterojunction Bipolar
Transistor (HBT) PA blocks are fabricated on a single Gallium Arsenide (GaAs) die. One PA block
operates in the EGSM900 band and the other PA block supports both the DCS1800 and the PCS1900
bands. Optimized for Li-Ion battery operation, both PA blocks share common power supply pins to
distribute current. A custom CMOS integrated circuit provides the internal interface circuitry, including
a current amplifier that minimizes the required power control current (IAPC) to 10 µA, typical. The GaAs
die, the Silicon (Si) die, and passive comments are mounted on a multi-layer laminate substrate. The
assembly is encapsulated with plastic overmold.
The RF input and output ports are internally matched to 50 Ω to reduce the number of external
components for a tri-band design. Extremely low leakage current (2 µA, typical) of the dual PA module
maximizes handset standby time. The SKY77321 also contains band-select switching circuitry to
select EGSM (logic 0) and DCS/PCS (logic 1) as determined from the Band Select (BS) signal. In the
block diagram shown below, the BS pin selects the PA output (DCS/PCS OUT or EGSM OUT) while the
Analog Power Control (APC) controls the level of output power.
Figure 1. Functional Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
103158P4 • Skyworks Proprietary and Confidential information. • Products and product information are subject to change without notice. • April 23, 2004
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet SKY77321.PDF ] | |
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