DATA SHEET SKY66181-11: 1805 to 1880 MHz Linear Power Amplifier Applications 3G/4G LTE Band 3 small cell VCC1 VBIAS VCC3 VEN Active distributed antenna system Cellular repeaters RFOUT Active Bias Coupling Port Driver amplifier Output Input RFOUT RFIN Match Match Stage 1 Stage 2 Stage 3 Features PA PA PA High gain: 38 dB (unconditionally stable) 203406-001 VCC2 High linearity: +23 dBm with < -50 dBc ACLR 85C Figure 1. SKY66181-11 Linear PA Block Diagram (WCDMA Test Model 1 with 64 DPCH) RF input and output internally matched to 50 ohms Description Excellent output return loss: < 30 dB The SKY66181-11 is a high-linearity power amplifier (PA) with Integrated active bias: performance compensated over temp fully matched input/output and high gain. The compact 5 x 5 mm PA On/Off function: < 2 us switching time PA is designed for FDD 3G/4G LTE small cell base stations Integrated coupler for output power monitoring operating from 1805 to 1880 MHz. The active biasing circuitry is integrated to compensate PA performance over temperature, Single supply voltage: 3.3 V voltage, and process variation as well as an internal coupler for Minimal external components power monitoring. Pin-to-pin compatible PA family supporting all 3GPP bands The SKY66181-11 requires minimal external components and is Small 5 x 5 mm, 28-pin package part of a high-linearity, pin-to-pin compatible PA family (MSL3, 260 C per JEDEC J-STD-020) supporting all 3GPP bands. A block diagram of the SKY66181-11 is shown in Figure 1. The device package and pinout for the 28-pin device are shown in TM Skyworks Green products are compliant with Figure 2. Table 1 lists the pin-to-pin compatible parts in the PA all applicable legislation and are halogen-free. family. For additional information, refer to Skyworks TM Denition of Green , document number SQ040074. Table 1. Pin-to-Pin Compatible PA Family Part Number Frequency (MHz) LTE Band SKY66181-11 1805 to 1880 3 SKY66184-11 2110 to 2170 1, 4, and 10 SKY66185-11 851 to 894 5, 6, 18, 19, 26, and 27 SKY66186-11 728 to 768 12, 13, 14, and 17 SKY66187-11 2620 to 2690 7 SKY66188-11 758 to 803 28 SKY66189-11 1930 to 1995 2 and 25 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 203406F Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 24, 2020 1 DATA SHEET SKY66181-11: 1805 to 1880 MHz Linear Power Amplifier 28 27 26 25 24 23 22 GND 21 GND 1 20 GND 2 GND N/C 19 RFOUT 3 RFIN 18 N/C 4 17 N/C 5 N/C GND 16 GND 6 VEN 15 GND 7 819 0 11 12 13 14 Y1111 Figure 2. SKY66181-11 Pinout (Top View) Table 2. SKY66181-11 Signal Descriptions Pin Name Description Pin Name Description 1 GND Ground 15 GND Ground 2 GND Ground 16 GND Ground 3 N/C No internal connection 17 N/C No internal connection 4 RFIN RF input 18 N/C No internal connection 5 N/C No internal connection 19 RFOUT RF output 6 GND Ground 20 GND Ground 7 VEN Enable (active low) 21 GND Ground 8 N/C No internal connection 22 N/C No internal connection 9 N/C No internal connection 23 VCC3 Output stage supply voltage 10 VBIAS Bias voltage 24 N/C No internal connection 11 GND Ground 25 GND Ground 12 N/C No internal connection 26 VCC2 Stage 2 PA supply voltage 13 GND Ground 27 GND Ground 14 RFOUT COUP RF output coupling port 28 VCC1 Input stage supply voltage Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 203406F Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 24, 2020 2 N/C VCC1 N/C GND VBIAS VCC2 GND GND N/C N/C GND VCC3 RFOUT COUP N/C