RFSA4023 TEMPERATURE COMPENSATING ATTENUATOR Features +85dBm IIP2 Typical 2 RFIN 3 12 GND 11 NC 10 RFOUT 9 NC VDD GND GND ATTEN 4 High 1dB Compression Point >+30dBm Low Supply Current 1mA Typical 3.3V Power Supply Class 1C ESD ( 1000V ) NC NC 1 5 6 7 8 GND 3 Selectable Attenuation versus Temperature Slopes +55dBm IIP3 Typical 13 CONTROL BLOCK Broadband 50MHz to 6000MHz Frequency Range 14 MODE2 15 MODE1 Patent Pending Circuit Architecture 16 GND GND GND Package: QFN, 16-Pin, 0.9mmx3mmx3mm Functional Block Diagram Complete Solution in a Small 3mmx3mm QFN Package 5V Part Available - RFSA4013 Applications Cellular, 3G Infrastructure WiBro, WiMax, LTE Microwave Radio High-Linearity Level Control Product Description RFMD's RFSA4023 is a fully monolithic analog temperature compensating attenuator (TCA) featuring exceptional linearity over its entire gain control range. It is designed to offset the gain reduction of an RF component over temperature without the need for closed loop feedback. Three customer selectable temperature coefficients make it a flexible solution for RF lineups. It incorporates revolutionary new circuit architecture to solve a long standing industry problem with regards to attenuator architecture: high IP3, low DC current and broad bandwidth. Traditional approaches for solving this problem require expensive co-fired ceramics with temperature sensitive materials or current hungry PIN diodes with elaborate area consuming control circuits. This temperature compensating attenuator requires only a single supply voltage and two logic bits to set control attenuation slope versus temperature. The RFSA4023 draws a very low 1mA current and is packaged in a small 3mmx3mm QFN. This attenuator is matched to 50 over its rated control range and frequency with no external matching components required. Ordering Information RFSA4023SQ RFSA4023SR RFSA4023TR7 RFSA4023PCK-410 Sample bag with 25 pieces 7” Sample reel with 100 pieces 7” Reel with 2500 pieces 50MHz to 6000MHz 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. DS140117 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 1 of 14 RFSA4023 Absolute Maximum Ratings Parameter Rating Supply Voltage (VDD) -0.5 to +4 V Mode Pin Voltage (MODE 1) -0.5 to +4 V Mode Pin Voltage (MODE 2) -0.5 to +4 V +30 dBm Operating Temperature -40 to +85 °C Storage Temperature -65 to +150 °C Maximum Junction Temperature +125 °C ESD - Human Body Model (HBM) 1000 V RF Input Power Parameter Unit Min. Specification Typ. Max. 3 3.3 3.5 Unit Condition General Supply Voltage (VDD) Supply Current Operating Temperature 1 -40 Thermal Resistance 85 45 RF Input Power V mA °C °C/W 27 dBm RF Performance Frequency Range 50 6000 MHz Attenuation Slope Mode1=Low Mode2=High 0.045 dB/°C -40°C to 85°C Attenuation Slope Mode1=High Mode2=High 0.058 dB/°C -40°C to 85°C Attenuation Slope Mode1=High Mode2=Low 0.066 dB/°C -40°C to 85°C Nominal +25°C Attenuation Mode1=Low Mode2=High 5.6 dB Nominal +25°C Attenuation Mode1=High Mode2=High 6.70 dB Nominal +25°C Attenuation Mode1=High Mode2=Low 7.85 dB 3 Deg Relative Phase Return Loss 20 dB Input 1dB Compression Point 30 dBm Input IP3 45 Insertion Phase at +25°C temperature relative to max temperature 55 dBm Input IP2 85 dBm PIN +(IM3dBC/2) PIN +IM2dBC, IM2 is F1+F2 Input IH2 87 dBm PIN +H2dBC, H2 is Second Harmonic Input IH3 58 dBm PIN +(H3dBC/2), H3 is Third Harmonic Power Supply MODE pin Logic Low MODE pin Logic High +0.4 1 V V NOTE: Typical performance at nominal conditions unless otherwise noted: Supply voltage=3.3V, Operating temperature=25°C, RF frequency 2GHz 2 of 14 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117 RFSA4023 Measured Performance Insertion Loss versus Temperature Insertion Loss versus Frequency RF 2GHz, VDD=3.3V Mode 1=High, Mode 2=Low, VDD=3.3V 0 -2 -2 -4 -4 -6 -6 Insertion Loss (dB) Insertion Loss (dB) 0 -8 -10 -12 -14 Mode1=High Mode2=Low -16 -8 -10 -12 -14 -16 Mode1=High Mode2=High -18 -18 Mode1=Low Mode2=High -20 0°C 40°C 60°C 80°C -40 -20 0 20 40 60 100 80 0 1 2 Temperature (°C) 5 6 Mode 1=Low, Mode 2=High, VDD=3.3V 0 -2 -2 -4 -4 -6 -6 Insertion Loss (dB) 0 -8 -10 -12 -14 -18 4 Insertion Loss versus Frequency Mode 1=High, Mode 2=High, VDD=3.3V -16 3 Frequency (GHz) Insertion Loss versus Frequency Insertion Loss (dB) -20°C 20°C -20 -60 -40°C -20°C 0°C 20°C 40°C 60°C -8 -10 -12 -14 -16 -18 80°C -20 -40°C -20°C 0°C 20°C 40°C 60°C 80°C -20 0 1 2 3 4 5 0 6 1 2 Frequency (GHz) 3 4 5 6 Frequency (GHz) Input Return Loss versus Temperature Input Return Loss versus Frequency RF 2GHz, VDD=3.3V Mode 1=High, Mode 2=Low, VDD=3.3V 0 0 -5 -5 -10 -10 Input Return Loss (dB) Input Return Loss (dB) -40°C -15 -20 -25 -30 -35 Mode1=High Mode2=Low -40 -15 -20 -25 -30 -35 -40 Mode1=High Mode2=High -45 -45 Mode1=Low Mode2=High -50 -40°C -20°C 0°C 20°C 40°C 60°C 80°C -50 -60 -40 -20 0 20 40 Temperature (°C) DS140117 60 80 100 0 1 2 3 4 5 6 Frequency (GHz) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 3 of 14 RFSA4023 Measured Performance Input Return Loss versus Frequency Input Return Loss versus Frequency Mode 1=High, Mode 2=High, VDD=3.3V Mode 1=Low, Mode 2=High, VDD=3.3V 0 -5 -5 -10 -10 Input Return Loss (dB) Input Return Loss (dB) 0 -15 -20 -25 -30 -35 -40 -45 -40°C -20°C 0°C 20°C 40°C 60°C -15 -20 -25 -30 -35 -40 -45 80°C 0°C 40°C 60°C -50 0 1 2 3 4 5 0 6 1 2 Frequency (GHz) 3 4 5 6 Frequency (GHz) Output Return Loss versus Temperature Output Return Loss versus Frequency RF 2GHz, VDD=3.3V Mode 1=High, Mode 2=Low, VDD=3.3V 0 0 -5 -5 -10 -10 Output Return Loss (dB) Output Return Loss (dB) -20°C 20°C 80°C -50 -15 -20 -25 -30 -35 Mode1=High Mode2=Low -40 -15 -20 -25 -30 -35 -40 Mode1=High Mode2=High -45 -45 Mode1=Low Mode2=High -50 -40°C -20°C 0°C 20°C 40°C 60°C 80°C -50 -60 -40 -20 0 20 40 60 80 100 0 1 2 Temperature (°C) Output Return Loss versus Frequency 4 5 6 Output Return Loss versus Frequency Mode 1=High, Mode 2=High, VDD=3.3V Mode 1=Low, Mode 2=High, VDD=3.3V 0 -5 -10 Output Return Loss (dB) -5 -10 -15 -20 -25 -30 -35 -40°C 0°C 40°C 80°C -40 -45 -20°C 20°C 60°C -15 -20 -25 -30 -35 -40°C 20°C 80°C -40 -45 -50 -20°C 40°C 0°C 60°C -50 0 1 2 3 Frequency (GHz) 4 of 14 3 Frequency (GHz) 0 Output Return Loss (dB) -40°C 4 5 6 0 1 2 3 4 5 6 Frequency (GHz) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117 RFSA4023 Measured Performance Input IP3 versus Temperature Input IP3 versus Attenuation RF 2GHz, VDD=3.3V, Pin=+20dBm/Tone 70 70 60 60 50 50 Input IP3 (dBm) Input IP3 (dBm) RF 2GHz, VDD=3.3V, Pin=+20dBm/Tone 40 30 40 30 20 20 Mode1=High Mode2=Low Mode1=High Mode2=Low Mode1=High Mode2=High 10 Mode1=High Mode2=High 10 Mode1=Low Mode2=High Mode1=Low Mode2=High 0 0 -60 -40 -20 0 20 40 60 80 100 -13 -12 -11 -10 -9 -7 -6 -5 -4 -3 Attenuation (dB) Input IP3 versus Temperature Input IP3 versus Temperature VDD=3.3V, Mode 1=High, Mode 2=Low, Pin=+20dBm/Tone VDD=3.3V, Mode 1=High, Mode 2=High, Pin=+20dBm/Tone 70 70 60 60 50 50 Input IP3 (dBm) Input IP3 (dBm) Temperature (°C) -8 40 30 20 40 30 20 10 50MHz 500MHz 1000MHz 2000MHz 3000MHz 4000MHz 10 0 50MHz 500MHz 1000MHz 2000MHz 3000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) -60 -40 -20 0 20 40 60 80 100 Temperature (°C) Input IP3 versus Temperature VDD=3.3V, Mode 1=Low, Mode 2=High, Pin=+20dBm/Tone 70 60 Input IP3 (dBm) 50 40 30 20 10 50MHz 500MHz 1000MHz 2000MHz 3000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) DS140117 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 5 of 14 RFSA4023 Measured Performance Input IP2 versus Temperature Input IP2 versus Attenuation RF 2GHz, VDD=3.3V, Pin=+20dBm/Tone 120 110 110 100 100 90 90 80 80 Input IP2 (dBm) Input IP2 (dBm) RF 2GHz, VDD=3.3V, Pin=+20dBm/Tone 120 70 60 50 40 30 70 60 50 40 30 Mode1=High Mode2=Low 20 10 Mode1=High Mode2=Low 20 Mode1=High Mode2=High Mode1=High Mode2=High 10 Mode1=Low Mode2=High 0 Mode1=Low Mode2=High 0 -60 -40 -20 0 20 40 60 80 100 -14 -12 -10 -8 -4 0 -2 Attenuation (dB) Input IP2 versus Temperature Input IP2 versus Temperature VDD=3.3V, Mode 1=High, Mode 2=Low,Pin=+20dBm/Tone VDD=3.3V, Mode 1=High, Mode 2=High, Pin=+20dBm/Tone 120 120 110 110 100 100 90 90 80 80 Input IP2 (dBm) Input IP2 (dBm) Temperature (°C) -6 70 60 50 40 30 70 60 50 40 30 50MHz 1000Mhz 3000MHz 20 10 500MHz 2000MHz 4000MHz 20 10 0 50MHz 500MHz 1000Mhz 2000MHz 3000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) -60 -40 -20 0 20 40 60 80 100 Temperature (°C) Input IP2 versus Temperature VDD=3.3V, Mode 1=Low, Mode 2=High, Pin=+20dBm/Tone 120 110 100 Input IP2 (dBm) 90 80 70 60 50 40 30 20 10 50MHz 500MHz 1000Mhz 2000MHz 3000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) 6 of 14 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117 RFSA4023 Measured Performance 3rd Harmonic IH3 versus Temperature 3rd Harmonic IH3 versus Attenuation RF 2GHz, VDD=3.3V, Pin=+20dBm 80 70 70 60 60 50 50 IH3 (dBm) IH3 (dBm) RF 2GHz, VDD=3.3V, Pin=+20dBm 80 40 30 40 30 20 20 Mode1=High Mode2=Low Mode1=High Mode2=Low Mode1=High Mode2=High 10 Mode1=High Mode2=High 10 Mode1=Low Mode2=High Mode1=Low Mode2=High 0 0 -60 -40 -20 0 20 40 60 80 100 -14 -12 -10 -8 -4 -2 0 Attenuation (dB) 3rd Harmonic IH3 versus Temperature 3rd Harmonic IH3 versus Temperature VDD=3.3V, Mode 1=High, Mode 2=Low, Pin=+20dBm VDD=3.3V, Mode 1=High, Mode 2=High, Pin=+20dBm 80 80 70 70 60 60 50 50 IH3 (dBm) IH3 (dBm) Temperature (°C) -6 40 30 40 30 20 20 10 50MHz 500MHz 1000Mhz 2000MHz 3000MHz 10 4000MHz 0 50MHz 500MHz 1000Mhz 2000MHz 3000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) -60 -40 -20 0 20 40 60 80 100 Temperature (°C) 3rd Harmonic IH3 versus Temperature VDD=3.3V, Mode 1=Low, Mode 2=High, Pin=+20dBm 80 70 60 IH3 (dBm) 50 40 30 20 10 50MHz 500MHz 1000Mhz 2000MHz 3000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) DS140117 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 7 of 14 RFSA4023 Measured Performance 2nd Harmonic IH2 versus Temperature 2nd Harmonic IH2 versus Attenuation RF 2GHz, Vdd=3.3V, Pin=+20dBm 120 110 110 100 100 90 90 80 80 IH2 (dBm) IH2 (dBm) RF 2GHz, VDD=3.3V, Pin=+20dBm 120 70 60 50 40 70 60 50 40 30 30 Mode1=High Mode2=Low 20 10 Mode1=High Mode2=Low 20 Mode1=High Mode2=High Mode1=High Mode2=High 10 Mode1=Low Mode2=High 0 Mode1=Low Mode2=High 0 -60 -40 -20 0 20 40 60 80 100 -14 -12 -10 -8 -4 0 -2 Attenuation (dB) 2nd Harmonic IH2 versus Temperature 2nd Harmonic IH2 versus Temperature VDD=3.3V, Mode 1=High, Mode 2=Low, Pin=+20dBm VDD=3.3V, Mode 1=High, Mode 2=High, Pin=+20dBm 120 120 110 110 100 100 90 90 80 80 IH2 (dBm) IH2 (dBm) Temperature (°C) -6 70 60 50 40 70 60 50 40 30 30 20 10 50MHz 500MHz 1000Mhz 2000MHz 3000MHz 50MHz 1000Mhz 3000MHz 20 10 4000MHz 0 500MHz 2000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) -60 -40 -20 0 20 40 60 80 100 Temperature (°C) 2nd Harmonic IH2 versus Temperature VDD=3.3V, Mode 1=Low, Mode 2=High, Pin=+20dBm 120 110 100 90 IH2 (dBm) 80 70 60 50 40 30 50MHz 1000Mhz 3000MHz 20 10 500MHz 2000MHz 4000MHz 0 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) 8 of 14 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117 RFSA4023 Measured Performance Relative Insertion Phase versus Attenuation Relative Insertion Phase versus Attenuation VDD=3.3V, Mode 1=High, Mode 2=High 20 15 15 Relavtive Insertion Phase (Deg) Relative Insertion Phase (Deg) VDD=3.3V, Mode 1=High, Mode 2=Low 20 10 5 0 -5 1GHz -10 2GHz 3GHz -15 10 5 0 -5 1GHz -10 2GHz 3GHz -15 4GHz 4GHz -20 -20 -16 -14 -12 -10 -8 -6 -4 -2 0 -16 -14 -12 -10 Attenuation (dB) Relative Insertion Phase versus Attenuation -4 -2 0 VDD=3.3V, Mode 1=High, Mode 2=Low 20 20 15 15 Relative Insertion Phase (Deg) Relative Insertion Phase (Deg) -6 Relative Insertion Phase versus Temperature VDD=3.3V, Mode 1=Low, Mode 2=High 10 5 0 -5 1GHz -10 2GHz 3GHz -15 10 5 0 -5 1GHz -10 2GHz 3GHz -15 4GHz -20 4GHz -20 -16 -14 -12 -10 -8 -6 -4 -2 0 -60 -40 -20 Attenuation (dB) 0 20 40 60 80 100 Temperature (°C) Relative Insertion Phase versus Temperature Relative Insertion Phase versus Temperature VDD=3.3V, Mode 1=High, Mode 2=High VDD=3.3V, Mode 1=Low, Mode 2=High 20 20 15 15 Relative Insertion Phase (Deg) Relative Insertion Phase (Deg) -8 Attenuation (dB) 10 5 0 -5 1GHz -10 2GHz 3GHz -15 10 5 0 -5 1GHz -10 2GHz 3GHz -15 4GHz 4GHz -20 -20 -60 -40 -20 0 20 40 Temperature (°C) DS140117 60 80 100 -60 -40 -20 0 20 40 60 80 100 Temperature (°C) 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 9 of 14 RFSA4023 Pin Names and Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND Function GND NC RFIN NC GND MODE1 MODE2 GND NC RFOUT NC GND GND GND VDD GND GND Description Ground Pin No Connection. Do not Connect to PC Board Ground Plane. RF Input. Use External DC Block. No Connection. Do not Connect to PC Board Ground Plane. Ground Pin Logic Input for Slope Selection. See Table for Options. Logic Input for Slope Selection. See Table for Options. Ground Pin No Connection. Do not Connect to PC Board Ground Plane. RF Output. Use External DC Block. No Connection. Do not Connect to PC Board Ground Plane. Ground Pin Ground Pin Ground Pin Supply Voltage (3.3V) Ground Pin Exposed Package Ground Paddle is RF and DC Ground Mode Selection Table 10 of 14 Mode1 Mode2 Slope dB/°C 25°C Atten (dB) LOW HIGH HIGH HIGH HIGH LOW 0.045 0.058 0.066 5.6 6.7 7.85 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117 RFSA4023 VDD Evaluation Board Schematic C4 1µF R5 0 C3 1000pF 13 14 15 16 1 12 2 11 RFSA4023 RFIN 3 C1 1000pF 4 9 C2 1000pF 8 7 6 5 C8 1000pF C7 1000pF MODE2 MODE1 DS140117 RFOUT 10 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 11 of 14 RFSA4023 Evaluation Board Assembly Drawing Evaluation Board Build of Materials (BOM) Description Temperature Compensating Attenuator TCA, 3.3V Reference Designator Manufacturer Manufacturer's P/N U1 RFMD RFSA4023 CONN, SMA, END LNCH, MINI, FLT, 0.068" J1-J2 Emerson Network Power 142-0741-851 CONN, HDR, ST, 4-PIN, 0.100", T/H P1-P2 MOLEX 22-28-4043 DDI SA2013-410(A) C1-C3, C7-C8 Murata Electronics GRM155R71H102KA01D C4 Murata Electronics GRM31MR71E105KC01L PCB, SA2013-410 CAP, 1000pF, 10%, 25V, X7R, 0402 CAP, 1F, 10%, 16V, X7R, 1206 RES, 0Ω, 0402 R5 Kamaya, Inc RMC1/16S-101JTH DNP C5-C6, C9 N/A N/A DNP R1-R4 N/A N/A 12 of 14 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117 RFSA4023 Package Drawing (0.9mmx3mmx3mm) 3.000±0.100 0.400±.050 1.700±0.100 0.500 BSC 3.000±0.100 1.700±0.100 0.250 +0.050 / -0.070 0.850±.050 0.203 Ref Branding Diagram (0.9mmx3mmx3mm) 5# 6TCEG«%QFG 3LQ,QGLFDWRU 7UDFH&RGHWREHDVVLJQHGE\6XE&RQ DS140117 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. 13 of 14 RFSA4023 PCB Patterns 14 of 14 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. DS140117