DATA SHEET SKY67105-306LF: 0.6-1.1 GHz Two-Stage, High Linearity and High Gain Low-Noise Amplifier Applications GSM, CDMA, WCDMA, cellular infrastructure systems Ultra low-noise, high gain and high linearity systems Features Ultra-low NF: 0.69 dB 850 MHz High gain: 37 dB 850 MHz +4 or +5 V operation for improved efficiency Stage 1 adjustable gain and current Wideband performance, useable to 1.1 GHz Small, QFN (16-pin, 4 x 4 mm) Pb-free package (MSL1, 260 C Figure 1. SKY67105-306LF Block Diagram per JEDEC J-STD-020) Description The SKY67105-306LF is a GaAs pHEMT and HBT two-stage, Low- Noise Amplifier (LNA) with active bias and high linearity performance. The pHEMT front end of the device provides an ultra-low Noise Figure (NF) while the HBT output stage provides high gain, linearity, and efficiency. The SKY67105-306LF operates in the frequency range of 0.6 to 1.1 GHz. For higher frequency operation, the pin and layout- compatible SKY67106-306LF (Data Sheet document 201521) should be used. The SKY67105-306LF is provided in a 4 x 4 mm, 16-pin Quad Flat No-Lead (QFN) package. A functional block diagram is shown in Figure 1. The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 201518A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice April 15. 2011 1 DATA SHEET SKY67105-306LF TWO-STAGE LNA Figure 2. SKY67105-306LF Pinout 16-Pin QFN (Top View) Table 1. SKY67105-306LF Signal Descriptions Pin Name Description Pin Name Description 1 N/C No connection. May be grounded with no 9 N/C No connection. May be grounded with no change in performance. change in performance. 2 N/C No connection. May be grounded with no 10 RF OUT2 RF output of second stage amplifier. Bias to change in performance. the output of stage 2 is supplied through pins 10 and 11. 3 RF IN1 RF input to first stage amplifier 11 RF OUT2 RF output of second stage amplifier. Bias to the output of stage 2 is supplied through pins 10 and 11. 4 RF GND RF ground for first stage amplifier 12 N/C No connection. May be grounded with no change in performance. 5 VBIAS1 Bias for first stage amplifier. External 13 N/C No connection. May be grounded with no resistor sets current consumption. change in performance. 6 FB Feedback pin for first stage amplifer. 14 N/C No connection. May be grounded with no change in performance. 7 RF OUT1 RF output of first stage amplifer 15 N/C No connection. May be grounded with no change in performance. 8 RF IN2 RF input to second stage amplifier 16 N/C No connection. May be grounded with no change in performance. Electrical and Mechanical Specifications Typical performance characteristics of the SKY67105-306LF are illustrated in Figures 3 through 15. The absolute maximum ratings of the SKY67105-306LF are provided in Table 2. Electrical specifications are provided in Tables 3 (VDD = +5 V) and 4 (VDD = +4 V). Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 April 15. 2011 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 201518A