SKY12340-364LF Skyworks

DATA SHEET SKY12340-364LF: 300 kHz 2.0 GHz Five-Bit Digital Attenuator with Serial-to-Parallel Driver Applications Cellular infrastructure Wireless receivers Features Single, +5 V DC supply voltage Integrated silicon serial-to-parallel driver Attenuation: 0.5 dB steps to 15.5 dB Small, QFN (32-pin, 5 x 5 mm) Pb-free package (MSL1, 260 C per JEDEC J-STD-020) Figure 1. SKY12340-364LF Block Diagram Description The SKY12340-364LF is a GaAs FET five-bit digital attenuator I/C with a serial-to-parallel driver. The device is provided in a 5 x 5 mm, 32-pin Quad Flat No-Lead (QFN) package. The SKY12340-364LF is particularly suited at IF frequencies for which high attenuation accuracy, low insertion loss, and low intermodulation products are required. 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 201111C Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice January 11, 2011 1 DATA SHEET SKY12340-364LF FIVE-BIT DIGITAL ATTENUATOR Figure 2. SKY12340-364LF Pinout 32-Pin QFN (Top View) Table 1. SKY12340-364LF Signal Descriptions Pin Name Description Pin Name Description 1 DATA OUT Serial data output 17 GND Ground 2 GND Ground 18 GND Ground 3 GND Ground 19 GND Ground 4 GND Ground 20 RF2 RF input/output 5 RF1 RF input/output 21 GND Ground 6 GND Ground 22 GND Ground 7 GND Ground 23 GND Ground 8 GND Ground 24 RESET Reset 9 GND Ground 25 LATCH Latch enable 10 GND Ground 26 DATA IN Serial data input 11 GND Ground 27 CLK IN Serial clock input 12 GND Ground 28 VSS Low output voltage level 13 GND Ground 29 GND Ground 14 GND Ground 30 C2 Charge pump capacitor 2 15 GND Ground 31 C1 Charge pump capacitor 1 16 GND Ground 32 VDD Supply voltage Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 January 11, 2011 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 201111C