DATA SHEET SKY12324-73LF: 0.5-4.0 GHz Two-Bit Digital Attenuator (4 dB LSB) Applications Cellular telephone base stations Test instrumentation Wireless data level control circuits Features Four dB LSB steps to 12 dB Single, positive control voltage per bit Low insertion loss Small SOT-6 package (MSL1, 260 C per JEDEC J-STD-020) Figure 1. SKY12324-73LF Block Diagram Description The SKY12324-73LF is a two-bit GaAs pHEMT digital attenuator in a low-cost SOT-6 package. The two attenuation bits, 4 and 8 dB, can be independently switched into or out of the signal path according to the magnitudes of the control voltages applied to the two high impedance control voltage inputs. The RF ports are internally matched to 50 and are fully bilateral. The SKY12324-73LF is ideally suited for use in applications where excellent attenuation accuracy, low insertion loss, and excellent intermodulation distortion performance 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. Figure 2. SKY12324-73LF Pinout 6-Pin SOT-6 (Top View) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 200219E Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice February 22, 2011 1 DATA SHEET SKY12324-73LF 1-BIT DIGITAL ATTENUATOR Table 1. SKY12324-73LF Signal Descriptions Pin Name Description Pin Name Description 1 J2 RF port. Must be DC blocked. 4 V1 DC control voltage. High input impedance control port for the 8 dB bit. The high control voltage applied to this pin must be within 0.2 V of the supply voltage applied to pin 3 or the part may be permanently damaged. The low control voltage is 0 V nominal. 2 GND RF ground. Must be AC-coupled to ground. 5 N/C No connect 3 J1 RF port. Must be DC blocked. 6 V2 DC control voltage. High input impedance control port for the 4 dB bit. The high control voltage applied to this pin must be within 0.2 V of the supply voltage applied to pin 3 or the part may be permanently damaged. The low control voltage is 0 V nominal. Table 2. SKY12324-73LF Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units RF input power (VCTL = 0/8 V) PIN +31 dBm Supply voltage VS 8 V Control voltage VCTL 0.2 +8.0 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. Electrical and Mechanical Specifications The state of the SKY12324-73LF is determined by the logic provided in Table 4. The absolute maximum ratings of the SKY12324-73LF are provided in Table 2. Electrical specifications are provided in Table 3. Typical performance characteristics of the SKY12324-73LF are illustrated in Figures 3 through 8. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 February 22, 2011 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 200219E