sky77344-21 Skyworks Solutions, Inc., sky77344-21 Datasheet
sky77344-21
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sky77344-21 Summary of contents
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... MODE terminal determines the function of the VRAMP signal. The EDGE mode is supported with a linear open loop configuration where amplifier gain is held constant with VRAMP and output power is determined by input power. GMSK mode is supported by operating the SKY77344- variable gain amplifier where VRAMP controls gain and resultant output power. ...
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... APPLICATION NOTE OPERATIONAL CONSIDERATIONS The SKY77344-21 is intended for multi-modulation GSM/GPRS/EDGE handset applications. The next two sections will describe how the module should be configured for use with GSM/GPRS and the EDGE waveforms. GSM/GPRS OPERATION For GMSK operation, set EN input high and MODE low (< 0.5 V). Select the desired TX band by setting the BS low (CEL/EGSM) or high (DCS/PCS). VRAMP is a pulsed ramp input that controls the module output power in a manner similar to a traditional “ ...
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... Saturation Detection/Correction Operation Description and External V When the SKY77344-21 PAM saturates under conditions of low battery and/or VSWR, a decrease in the internal power control loop gain- bandwidth occurs, producing high level switching transients on the falling edge of the burst. To prevent this condition, the SKY77344-21 includes an autonomous saturation detection / correction function ...
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... OUT IN To operate the SKY77344-21 in EDGE (8PSK) mode, set both EN input and MODE high. Select the desired TX band by setting BS low for CEL/EGSM or high for DCS/PCS. The analog input, VRAMP, adjusts the quiescent current and is set to obtain the desired ACPR and EVM margin for the appropriate band. VRAMP is intended to remain fixed throughout the transmit slot. Using bias control, VRAMP, allows gain control and optimization of the current at lower output power ...
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... DCS/PCS_TX GMSK SKY77344-21 Test Fixture The SKY77344-21 test fixture assembly is shown in Figure 3 and the schematic of the test fixture is shown in Figure 4. Artwork of the four layers of the test fixture assembly is shown in Figure 5 through Figure 8. Not all components shown are installed on the test fixture installed to connect VRAMP from P1. Alternately, R2 and J1 may be installed to allow application of VRAMP via the SMA coaxial connector ...
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... Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 6 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 4. SKY77344-21 Power Amplifier Text Fixture ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 5. Power Amplifier Test Fixture Schematic Diagram – SKY77344-21 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201236A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 16, 2010 ...
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... APPLICATION NOTE Figure 6. SKY77344-21 Power Amplifier Test Fixture PCB Layer 1 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 8 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 7. SKY77344-21 Power Amplifier Test Fixture PCB Layer 2 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201236A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 16, 2010 ...
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... APPLICATION NOTE Figure 8. SKY77344-21 Power Amplifier Test Fixture PCB Layer 3 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 10 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 9. SKY77344-21 Power Amplifier Test Fixture PCB Layer 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201236A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 16, 2010 ...
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... APPLICATION NOTE Figure 10. Application Circuit Diagram for SKY77344-21 Power Amplifier Battery Bypassing VBATT line of the PA module requires low frequency bypassing capacitance. In modern communication systems, a GSM PA draws rapid pulses of current that can cause a significant transient during the transmission. This might affect the output power mask at high power levels. Most lab supplies are not suited for digital communications and do not emulate the phone board battery condition. Hence, in some cases a higher value capacitor of 68 μ ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION INPUT / OUTPUT PAD DESCRIPTION Figure 11. SKY77344-21 Pad Names and Configuration (Top View) 1 Pad Name ENABLE 3 VRAMP 4 DCS/PCS_IN 5 GSM_IN 13 GSM_OUT 15 DCS/PCS_OUT 17 VBATT1 18 VBATT2 19 VDET 20 MODE GROUND GROUND PAD 1. Pad numbers 6-12, 14, 16 are GROUND pads Skyworks Solutions, Inc. • ...
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... Figure 12. Transmit Timing Diagram for Single-Slot GMSK Operation Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 14 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 13. Transmit Timing Diagram for Single-Slot EDGE Timing Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201236A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 16, 2010 ...
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... Figure 14. Transmit Timing Diagram for Multi-slot GMSK to EDGE Slot Operation Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 16 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 15. Transmit Timing Diagram for Multi-slot GMSK to EDGE Operation – Maximum Timing Advance Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201236A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 16, 2010 ...
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... Figure 16. Transmit Timing Diagram for Multi-slot EDGE to GMSK Operation Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 18 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION ...
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... SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 17. Transmit Timing Diagram for Multi-slot GMSK to GMSK Operation Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201236A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 16, 2010 ...
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... Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 20 February 16, 2010 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 201236A SKY77344 POWER AMPLIFIER MODULE – EVALUATION INFORMATION Figure 18. Recommended RAMP Profile • 10 μs log ramp-down profile • ...
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... Initial Release References Data Sheet: SKY77344-21 PA Module for Quad-Band GSM / EDGE, Document No. 201086 Copyright © 2010 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer ...