Preliminary C0.25 VDD N/C RF1 N/C N/C. Product Description. Ordering Information

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1 RFSA74 Parallel Controlled Digital Step Attenuator 5MHz to 4MHz, 7-Bit,.5dB LSB Package Style: QFN 4-Pin, 4mm x 4 mm Features C.5 C C C4 C8 C Frequency Range 5MHz to 4MHz 7-Bit, 3.75dB Range,.5dB Step C.5 8 High Linearity, IP3 > 5dBm VDD Logic Circuit 7 3V and 5V Logic Compatible 3 6 On-chip Parallel Decoder Parallel Programming Interface On-chip ESD Protection > 5V HBM Single Supply, 3V to 5V Operation RF Bit DSA RF Footprint Compatible with Most Pin, 4mm x 4mm QFNs Applications Functional Block Diagram Transceiver IF Applications Cellular, PCS, GSM, UMTS, LTE, WiMax/WLAN Wireless Data, Satellite Terminals Test Equipment Product Description RFMD s RFSA74 is a 7-bit Digital Step Attenuator (DSA) that features high linearity over the entire 3.75dB gain control range with excellent step accuracy in.5db steps. The parallel-controlled RFSA74 has an on-chip decoder that is both 3V and 5V compatible. The RFSA74 also offers a rugged Class B HBM ESD rating via on-chip ESD circuitry. The MCM package is footprint compatible with most 4-pin, 4mm x 4 mm, QFN packages. Ordering Information RFSA74SR RFSA74SQ RFSA74TR7 RFSA74TR3 RFSA74PCK-4 7 Reel with pieces Sample bag with 5 pieces 7 Reel with 75 pieces 3 Reel with 5 pieces PCBA with 5-piece sample bag Optimum Technology Matching Applied GaAs HBT SiGe BiCMOS GaAs phemt GaN HEMT GaAs MESFET Si BiCMOS Si CMOS RF MEMS InGaP HBT SiGe HBT Si BJT LDMOS RF MICRO DEVICES, RFMD, Optimum Technology Matching, Enabling Wireless Connectivity, PowerStar, POLARIS TOTAL RADIO and UltimateBlue are trademarks of RFMD, LLC. BLUETOOTH is a trademark 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. 6, RF Micro Devices, Inc. Prelim DS3 768 Thorndike Road, Greensboro, For sales or technical of 8

2 RFSA74 Absolute Maximum Ratings Parameter Rating Unit Supply Voltage +5.5 V DC Supply Current 5 ma Power Dissipation 83 mw Max RF Input Power 7 dbm Operating Temperature (Tcase) -4 to +85 C Storage Temperature -4 to +5 C Junction Temperature 5 C ESD Rating (HBM) Class B Moisture Sensitivity Level MSL Caution! ESD sensitive device. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. RoHS status based on EUDirective/95/EC (at time of this document revision). The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any 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 application circuitry and specifications at any time without prior notice. Parameter Specification Min. Typ. Max. Unit Frequency Range 5 4 MHz Insertion Loss db Condition 5MHz db attenuation 85MHz db attenuation 7MHz db attenuation 38MHz db attenuation Gain Control Range 3.75 db.5db step size Step Accuracy +/- (.+4% attenuation setting) db Input IP3 5 dbm 4MHz Input P.dB 5 dbm MHz Return Loss 5 db DC - 3MHz, all states Control Interface 7-bit, Parallel Parallel Interface Settling Time ns trise, tfall (%/9% RF) Switching Speed ns ton, toff (5% CTL to %/9% RF) Supply Voltage (VDD) V Supply Current 7.5 ma Control Voltage (VCTL) Low, VCTL= to.8v High, VCTL=. to VDD Notes:. VDD=5V, VCTL=5V, T=5C. Broadband Application Circuit (with caps) 3. IIP3 measured with Pin=+dBm/tone, MHz spacing V of Thorndike Road, Greensboro, For sales or technical Prelim DS3

3 RFSA74 Typical Performance - Broadband Application Circuit (5V, 5 C) DSA db Insertion Loss (db) Normalized Attenuation (db) - -4C 5C 85C DSA Major Step Error (db) MHz GHz 3GHz Step Error (db) 5MHz GHz 4GHz Attenuation State (db) Prelim DS3 768 Thorndike Road, Greensboro, For sales or technical 3 of 8

4 RFSA74 Input Return Loss (db) Output Return Loss (db) db.5db db.5db dB db 8dB 3.75dB db 4dB 6dB dB db 8dB 3.75dB db 4dB 6dB Relative Phase (Deg) Worst Case Step Error (db) Between Successive States 8 6.5dB.dB 4.dB.5dB.dB 8.dB dB 3.75dB Normalized Attenuation (db) DSA Input IP3 (dbm) MHz 5MHz GHz GHz 3GHz 4GHz db.5db dB db 8dB 3.75dB db 4dB 6dB Attenuation State (db) of Thorndike Road, Greensboro, For sales or technical Prelim DS3

5 RFSA74 DSA DC Current (ma) C 5C 85C Attenuation State (db) Prelim DS3 768 Thorndike Road, Greensboro, For sales or technical 5 of 8

6 RFSA74 Truth Table Control Bit C6 C8 C4 C C C.5 C.5 Relative Gain Setting Max Gain -.5dB -.5dB -db -db -4dB -8dB -6dB -3.75dB Note: C.5=D, C.5=D,, C6=D6 (for the purpose of the example below) Logic Voltage Levels State Logic Low V to.8v High.V to 5.V Pin Name and Description Table Pin Function Description C.5.5dB Control Bit VDD Power Supply 3 No Internal Connection. EVB can be ground or no connect. 4 RF RF Port. External DC Block Required. 5 No Internal Connection. EVB can be ground or no connect. 6 No Internal Connection. EVB can be ground or no connect. 7 AC Ground Connection for Operation below 5MHz 8 AC Ground Connection for Operation below 5MHz 9 AC Ground Connection for Operation below 5MHz AC Ground Connection for Operation below 5MHz AC Ground Connection for Operation below 5MHz No Internal Connection. EVB can be ground or no connect. 3 No Internal Connection. EVB can be ground or no connect. 4 No Internal Connection. EVB can be ground or no connect. 5 RF RF Port. External DC Block Required. 6 No Internal Connection. EVB can be ground or no connect. 7 No Internal Connection. EVB can be ground or no connect. 8 No Internal Connection. EVB can be ground or no connect. 9 C6 6dB Control Bit C8 8dB Control Bit C4 4dB Control Bit C db Control Bit 3 C db Control Bit 4 C.5.5dB Control Bit EPAD DC & RF Ground. Must be soldered to EVB ground plane over a bed of vias for thermal and RF performance. 6 of Thorndike Road, Greensboro, For sales or technical Prelim DS3

7 RFSA74 Evaluation Board Assembly Drawing Evaluation Board Schematic R7 ohm C5 C5 C C C4 C8 C6 R5 ohm R6 ohm R4 ohm R ohm R ohm R3 ohm VDD C5 C5 C C C4 C8 C6 P CON9 J RF VDD C7 nf C 47pF U C5 VDD RF C5 C RF C C4 C8 C6 C 47pF J RF C7 68pF C6 68pF C5 68pF Prelim DS3 768 Thorndike Road, Greensboro, For sales or technical 7 of 8

8 RFSA74 Evaluation Board Bill of Materials Component Description U RFSA74 Digital Step Attenuator J, J PCB Mount SMA Connector P 9-Pin DC Connector C5, C6, C7 68pF Capacitor 4 C8 nf Capacitor 4 C, C 47pF Capacitor 4 R, R, R3, R4, R5, R6, R7 Ω Resistor 4 Package Outline Drawing PIN DOT BY MARKING 4.±.5.7±.5 Exp.DAP PIN # IDENTIFICATION CHAMFER.3 X 45.4±.5 4.±.5 SA64 SA74 YYWW Trace Code.5 Bsc.5±.5.7±.5 Exp.DAP TOP VIEW.5 Ref. BOTTOM VIEW.85± Ref. SIDE VIEW YYWW = Date Code, where YY=year, WW=week Trace Code to be assigned by assembly SubCon 8 of Thorndike Road, Greensboro, For sales or technical Prelim DS3