SKY12325-350LF-EVB Skyworks

DATA SHEET SKY12325-350LF: 0.5-6.0 GHz Three-Bit Digital Attenuator (1 dB LSB) Applications Cellular Bluetooth systems General-purpose level control Features Broadband operation: 0.5 to 6.0 GHz Attenuation: 7 dB Positive control voltage Resolution: 1 dB Miniature QFN (16-pin, 3 x 3 mm) package (MSL1, 260 C per JEDEC J-STD-020) Figure 1. SKY12325-350LF Block Diagram Description The SKY12325-350LF is a three-bit digital attenuator. The attenuation bits are binary weighted, with the Least Significant Bit (LSB) equal to 1 dB. States are selected by three positive voltage control inputs (pins V1, V2, and V3). DC blocking capacitors are required at each RF port. Both RF ports are absorptive. The SKY12325-350LF is provided in a miniature 3 x 3 mm, 16-pin exposed pad plastic 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. Figure 2. SKY12325-350LF Pinout 16-Pin QFN (Top View) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 200423D Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice April 22, 2011 1 DATA SHEET SKY12325-350LF THREE-BIT DIGITAL ATTENUATOR Table 1. SKY12325-350LF Signal Descriptions Pin Name Description Pin Name Description 1 N/C No connection 9 N/C No connection 2 J1 RF input or output port. An external 47 pF 10 N/C No connection (recommended value) DC blocking capacitor is required. 3 N/C No connection 11 J2 RF input or output port. An external 47 pF (recommended value) DC blocking capacitor is required. 4 N/C No connection 12 N/C No connection 5 GND Ground 13 V1 High impedance control voltage input for 4 dB weighted bit (MSB) 6 GND Ground 14 V2 High impedance control voltage input for 2 dB weighted bit 7 GND Ground 15 V3 High impedance control voltage input for 1 dB weighted bit (LSB) 8 N/C No connection 16 VDD Supply voltage Note: Exposed paddle must be grounded. Table 2. SKY12325-350LF Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units RF input power PIN +30 dBm Supply voltage VS +6 V Control voltage VCTL 0 +6 V Operating temperature TOP 40 +85 C Storage temperature TSTG 65 +150 C Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device. CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. The state of the SKY12325-350LF is determined by the logic Electrical and Mechanical Specifications provided in Table 4. The absolute maximum ratings of the SKY12325-350LF are provided in Table 2. Electrical specifications are provided in Table 3. Typical performance characteristics of the SKY12325-350LF are illustrated in Figures 3 through 6. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 April 22, 2011 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 200423D