RFSA2644 Serial Con- trolled Digital Step Attenua- tor RFSA2644 SERIAL CONTROLLED DIGITAL STEP ATTENUATOR 50MHz TO 4000MHz, 6-BIT, 0.5dB LSB Package: MCM, 24-Pin, 4.2mm x 4.2mm 24 23 22 21 20 19 1 GND 18 GND Features 2 17 GND VDD SPI Frequency Range 50MHz to 4000MHz 3 16 GND GND 6-Bits, 31.5dB Range, 0.5dB Step 4 15 RF1 RF2 High Linearity, IP3 >48dBm 6-Bit DSA 5 14 GND GND 3V and 5V Logic Compatible 6 13 GND GND Serial-to-Parallel Controller 7 9 10 11 12 Serial Programming Interface 8 Power-up Programming Modes On-Chip ESD Protection Class 1C HBM Functional Block Diagram Single Supply, 3V to 5V Operation Product Description Footprint Compatible with Most RFMDs RFSA2644 is a 6-bit digital step attenuator (DSA) that features high linear- 24-Pin, 4mm x 4mm, QFNs ity over the entire 31.5dB gain control range with excellent step accuracy in 0.5dB steps. The RFSA2644 is programmed via a serial mode control interface that is Applications both 3V and 5V compatible. The RFSA2644 also offers a rugged Class 1C HBM ESD Transceiver RF and IF rating via on-chip ESD circuitry. The MCM package is footprint compatible with most Applications 24-pin, 4mm x 4mm, QFN packages. Cellular, PCS, GSM, UMTS, LTE, WiMax/WiFi Wireless Data, Satellite Terminals Test Equipment Ordering Information RFSA2644SR 7 Sample reel with 100 pieces RFSA2644SQ 25-Piece sample bag RFSA2644TR7 7 Reel with 750 pieces RFSA2644TR13 13 Reel with 2500 pieces RFSA2644PCK-410 50MHz to 4000MHz PCBA with 5-piece sample bag Optimum Technology Matching Applied GaAs HBT SiGe BiCMOS GaAs pHEMT GaN HEMT GaAs MESFET Si BiCMOS Si CMOS BiFET HBT InGaP HBT SiGe HBT Si BJT RF MICRO DEVICES, RFMD, Optimum Technology Matching, Enabling Wireless Connectivity, PowerStar, POLARIS TOTAL RADIO and UltimateBlue are trademarks of RFMD, LLC. BLUETOOTH is a trade- mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. 2012, RF Micro Devices, Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical DS120706 support, contact RFMD at (+1) 336-678-5570 or customerservice rfmd.com. 1 of 12 GND DATA GND NC LE GND CLK GND GND PUP GND NCRFSA2644 Absolute Maximum Ratings Caution ESD sensitive device. Parameter Rating Unit Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Supply Voltage +5.5 V Rating conditions to the device may reduce device reliability. Specified typical perfor- mance or functional operation of the device under Absolute Maximum Rating condi- DC Supply Current 15 mA tions is not implied. Power Dissipation 83 mW The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. RFM) for its use, nor for any Max RF Input Power 28.3 dBm infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended appli- Operating Temperature (T )-40 to +85 C CASE cation circuitry and specifications at any time without prior notice. Storage Temperature -40 to +150 C RFMD Green: RoHS compliant per EU Directive 2002/95/EC, halogen free Junction Temperature 150 C per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and red phosphorus as a flame retardant, and <2% antimony in solder. ESD Rating (HBM) Class 1C V Moisture Sensitivity Level MSL3 Specification Parameter Unit Condition Min. Typ. Max. Frequency Range 50 4000 MHz 5V, 25C unless otherwise stated Insertion Loss 0.6 dB 50MHz, 0dB attenuation 0.7 dB 500MHz, 0dB attenuation 0.8 dB 880MHz, 0dB attenuation 1.2 dB 2140MHz, 0dB attenuation 1.4 2700MHz, 0dB attenuation 1.8 dB 4000MHz, 0dB attenuation Gain Control Range 31.5 dB 0.5dB step size Step Accuracy (0.1+5% attenuation range) dB Input IP3 48 55 dBm Input P0.5dB 20 20.2 dBm Under 100MHz, all states 28 30 dBm 150MHz to 1000MHz, all states Input Return Loss 13 29 dBm Under 2700MHz 10 18 dBm 2700MHz to 4000MHz Output Return Loss 13 27 dBm Under 2700MHz 11.5 22 dBm 2700MHz to 4000MHz Control Interface 6-Bit, Serial Serial interface Settling Time 200 nS t , t (10%/90% RF) RISE FALL Switching Speed 200 nS t , t (50% CTL to 10%/90% RF) ON OFF Supply Voltage (V ) 4.75 5.0 5.25 V DD Supply Current 5.2 mA Control Voltage (V )Low, V = 0 to 0.8V V CTL CTL High, V = 2.0 to V V CTL DD Notes: 1. V = 5V, V = 5V, T = 25C DD CTL 2. IIP3 measured with P = 17dBm/tone, 1MHz spacing IN 7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical 2 of 12 support, contact RFMD at (+1) 336-678-5570 or customerservice rfmd.com. DS120706