RFSA2624

RFSA2624 Serial Controlled Digital Step AttenuatoR 50MHz to 4000MHz, 6Bit, 0.5dB LSB RFSA2624 SERIAL CONTROLLED DIGITAL STEP ATTENUATOR 50MHz to 4000MHz, 6-BIT, 0.5dB LSB Package: MCM, 24-Pin, 4.2mmx4.2mm Features  Frequency Range 50MHz to 4000MHz 6-Bits, 31.5dB Range, 0.5dB Step High Linearity, OIP3>48dBm through over 700MHz to 2700MHz 3V and 5V Logic Compatible Serial-to-Parallel Controller Serial Programming Interface Power-up Programming Modes On-chip ESD Protection >500V HBM Single Supply, 3V to 5V Operation Footprint compatible with most 24-pin, 4mm QFNs Functional Block Diagram         Product Description RFMD’s RFSA2624 is a 6-bit Digital Step Attenuator (DSA) that features high linearity over the entire 31.5dB gain control range with excellent step accuracy in 0.5dB steps. The RFSA2624 is programmed via a serial mode control interface that is both 3V and 5V compatible. The RFSA2624 also offers a rugged Class 1B HBM ESD rating via on-chip ESD circuitry. The MCM package is footprint compatible with most 24-pin, 4mm, QFN packages.  Applications   Transceiver IF Applications Cellular, PCS, GSM, UMTS, LTE, WiMax/WLAN Wireless Data, Satellite Terminals Test Equipment   Ordering Information RFSA2624SR RFSA2624SQ RFSA2624TR7 RFSA2624TR13 RFSA2624PCK-410 7” Reel with 100 pieces Sample bag with 25 pieces 7” Reel with 750 pieces 13” Reel with 2500 pieces 50MHz to 4000MHz PCBA with 5-piece sample bag Optimum Technology Matching® Applied GaAs HBT GaAs MESFET InGaP HBT SiGe BiCMOS Si BiCMOS SiGe HBT GaAs pHEMT Si CMOS Si BJT GaN HEMT BiFET HBT 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. ©2006, RF Micro Devices, Inc. DS110408 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 1 of 9 RFSA2624 Absolute Maximum Ratings Parameter Supply Voltage DC Supply Current Power Dissipation Max RF Input Power Operating Temperature (TCASE) Storage Temperature Junction Temperature ESD Rating (HBM) Moisture Sensitivity Level Rating +5.5 15 83 27 -40 to +85 -40 to +150 150 Class 1B MSL3 Unit V mA mW dBm °C °C °C 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 EUDirective2002/95/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 Frequency Range Insertion Loss Min. 50 Specification Typ. 1.5 1.7 2.3 2.5 Max. 4000 1.9 2.8 Unit MHz dB dB dB dB dB dB dBm dBm dB bit nS nS Condition 150MHz, 0dB attenuation 850MHz, 0dB attenuation 2700MHz, 0dB attenuation 3800MHz, 0dB attenuation 0.5dB step size 700MHz to 2700MHz, all states 700MHz to 2700MHz, all states 700MHz to 2700MHz, all states Serial Interface tRISE, tFALL (10%/90% RF) tON, tOFF (50% CTL to 10%/90% RF) Gain Control Range Step Accuracy Input IP3 (0 - 15.5dB states) Input P1dB Return Loss Control Interface Settling Time Switching Speed Supply Voltage (VDD) Supply Current Control Voltage (VCTL) 0 2.0 4.75 31.5 ±(0.15+5.0% attenuation setting) 48 27 13 6 250 250 5.0 5 0.8 VDD 5.25 V mA V V Low High Notes: 1. VDD =5V, VCTL =3V, T=25°C 2. Broadband Application Circuit (with ACG capacitors) 3. IIP3 measured with Pin=+10dBm/tone, 1MHz spacing 2 of 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. DS110408 RFSA2624 Typical Performance - Broadband Application Circuit (25°C) Insertion Loss (De-embedded) 0.0 -0.5 Insection Loss (dB) -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 0.0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) 3.0 3.5 4.0 25C -40C 85C Normalized Attenuation, MajorStates 0 -5 -10 Attenuation (dB) -15 -20 -25 -30 -35 -40 0.0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) 3.0 3.5 4.0 0.5 2 8 31.5 1 4 16 Return Loss of RF1, MajorStates 0 -5 Return Loss (dB) -10 -15 -20 -25 -30 -35 -40 0 0.5 1 1.5 2 2.5 Frequency (GHz) 3 3.5 4 0 1 4 16 0.5 2 8 31.5 Return Loss of RF2, MajorStates 0 -5 Return Loss (dB) -10 -15 -20 -25 -30 -35 -40 0 0.5 1 1.5 2 2.5 Frequency (GHz) 3 3.5 4 0 1 4 16 0.5 2 8 31.5 Step Error, MajorStates 0.8 0.6 0.8 0.6 Step Error vs. Attenuation State Step Error (dB) 0.2 0.0 -0.2 -0.4 -0.6 -0.8 0 0.5 1 1.5 2 2.5 Frequency (GHz) 3 3.5 4 0.5 2 8 31.5 1 4 16 Step Error(dB) 0.4 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 0 4 8 12 16 20 24 28 32 50MHz 1GHz 3GHz 500MHz 2GHz 4GHz Attenuation (dB) DS110408 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 3 of 9 RFSA2624 Typical Performance - Broadband Application Circuit (25°C) (Continued) Relative Phase, MajorStates 60 50 Relative Phase (deg) 40 30 20 10 0 -10 -20 0 0.5 1 1.5 2 2.5 Frequency (GHz) 3 3.5 4 0.5 2 8 31.5 1 4 16 0.8 0.6 0.4 Worst Case Successive Step Error Error(dB) 0.2 0.0 -0.2 -0.4 -0.6 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Frequency(GHz) 4 of 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. DS110408 RFSA2624 Truth Table Control Bit C16 1 1 1 1 1 1 0 0 C8 1 1 1 1 1 0 1 0 C4 1 1 1 1 0 1 1 0 C2 1 1 1 0 1 1 1 0 C1 1 1 0 1 1 1 1 0 C0.5 1 0 1 1 1 1 1 0 Relative Gain Setting Max gain -0.5dB -1dB -2dB -4dB -8dB -16dB -31.5dB Note: C 0.5=D0, C1=D1, ... C16=D5 (for the purpose of the example below) Serial Port Interface t6 t1 t2 t4 t5 t3 t8 SPI Timing Diagram Programming example – 6-bit CLK DATA t7 CLK DATA LE MSB D5 D4 D3 D2 D1 LSB D0 LE t9 DOUT t10 SPI Timing Diagram Specifications Parameter t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 Limit 25 20 20 5 5 30 5 5 10 20 Unit MHz max ns min ns min ns min ns min ns min ns min ns min ns min ns min Comment CLK Frequency CLK High CLK Low DATA to CLK Setup Time DATA to CLK Hold Time Data Valid LE to CLK Setup Time CLK to LE Setup Time LE Pulse Width Output Set LOGIC Voltage Levels State Low High Logic 0V to 0.8V 2.0V to 5.0V DS110408 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 5 of 9 RFSA2624 Pin Names and Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 EPAD Function GND VDD GND RF1 GND ACG ACG ACG ACG ACG ACG GND ACG GND RF2 GND GND GND NC PUP CLK LE NC DATA GND Description DC and RF Ground. Power supply. DC and RF Ground. RF port. External DC block required. DC and RF Ground. AC ground for operation below 500MHz; leave unconnected above 500MHz. AC ground for operation below 500MHz; leave unconnected above 500MHz. AC ground for operation below 500MHz; leave unconnected above 500MHz. AC ground for operation below 500MHz; leave unconnected above 500MHz. AC ground for operation below 500MHz; leave unconnected above 500MHz. AC ground for operation below 500MHz; leave unconnected above 500MHz. DC and RF Ground. AC ground for operation below 500MHz; leave unconnected above 500MHz. DC and RF Ground. RF port. External DC block required. DC and RF Ground. DC and RF Ground. DC and RF Ground. No internal connection. EVB can be ground or no connect. Power-up Programming pin. Low=max attenuation (31.5dB) at power-up, High=min attenuation (0dB) at power-up. Serial Clock. Latch Enable. No internal connection. EVB can be ground or no connect. Serial Data. DC and RF ground. Must be soldered to EVB ground plane over a bed of vias for thermal and RF performance. Power-up Programming Truth Table PUP Low High Attenuator Setting Attenuation at max, 31.5dB Attenuation at min, 0dB 6 of 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. DS110408 RFSA2624 Evaluation Board Assembly Drawing C05/DATA C4/CLK C8/PUP C2/LE C025 GND VDD P1 R7 C8 C7R5 J1 RF1 R6 R4 R1 R2 R8 U1 C12 C13 C11 C18 C17 C14 C16 C15 SA26X4410(C) J99 C19 C20 J100 15.5MIL LINE DS110408 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. R3 C9 C6 C5 C4 C3 C2 C1 C16 C1 J2 RF2 7 of 9 RFSA2624 Evaluation Board Schematic Evaluation Board Bill of Materials (BOM) Description PCB CAP, 680pF, 10%, 50V, X7R, 0402 CAP, 0.1uF, 10%, 10V, X5R, 0402 CAP, 1000pF, 10%, 50V, X7R, 0402 RES, 0 OHM, 0402 DNI CONN, SMA, END LNCH, UNIV, HYB MNT, FLT CONN, HDR, ST, PLRZD, 9-PIN RFSA2624SB C13, C15, C16, C17 C11, C12, C19, C20 C7 R1, R2, R4, R5, R8 C1-C6, C8, C9, C14, C18, R3, R6-7 J1, J2, J99, J100 P1 U1 Heilind Electronics ITW Pancon RFMD PER MAT-21-1038 MPSS100-9-C RFSA2624 Murata Taiyo Yuden (USA), Inc. Taiyo Yuden (USA), Inc. Kamaya, Inc Reference Designator Manufacturer Manufacturer's P/N RFSA26X4410(B) GRM155R71H681KA01E RM LMK105BJ104KV RM UMK105BJ102KV-F RMC1/16SJPTH NOTE: Parts with * following the Reference Designator should not be populated on PCBA. RFMD devices (DUT) may require baking per IPC/JEDEC J-STD-020 for a minimum of 24 hours at 125 +5/-0 °C. Assembly must take place within 12 hours of bake completion. Manufacturers' P/Ns are subject to change by the manufacturers following the issue of this document and are thereby included for reference only. Contact RFMD Corporate Engineering Materials with questions regarding specific Manufacturers' P/Ns. Shaded lines indicate approved alternate components. 8 of 9 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. DS110408 RFSA2624 Package Drawing DS110408 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. 9 of 9