High Frequency Surface Mount Attenuators RFAXX Series • Low return loss • RoHS compliant • High power chip attenuators • Long life, temperature stable thin film on ceramic technology The RFAXX series of 50Ω high frequency attenuators are available in a variety of sizes and termination styles to suit applications for mounting on heat sinks or normal PC board materials. High thermal conductivity aluminum nitride substrates provide the low resistance thermal path for high power dissipation applications. Frequency performance up to 4GHz assures proper operation in RF and microwave power amplifiers, RF transmitters and receivers and RF power sources. Electrical Data Frequency Range Power Rating @ 70°C Attenuation RFA53SDLF RFA54DDLF RFA55SDLF RFA55DDLF DC to 4GHz DC to 4GHz DC to 4GHz DC to 4GHz 0.25W 0.25W 0.25W 0.25W ±0.2 dB 1, 2, 3, 4, 5, 6dB ±0.3 dB 7, 8, 9, 10dB ±0.4 dB 20, 30, 40dB Impedance 50Ω ±2% Absolute TCR ±50ppm/°C Frequency Range Power Rating @ 70°C Attenuation RFA84SDLF RFA84DDLF RFA37DDLF DC to 1GHz DC to 1GHz DC to 1GHz 0.50W 0.50W 1.0W ±0.2 dB 1, 2, 3, 4, 5, 6dB ±0.3 dB 7, 8, 9, 10dB ±0.4 dB 20, 30, 40dB Impedance Absolute TCR 50Ω ±2% ±50ppm/°C General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc RFAXX Series Issue February 2009 Sheet 1 of 4 High Frequency Surface Mount Attenuators Frequency Performance Data RFA55DDLF40dB Impedance RFA55DDLF20dB Impedance CH1 S 11 1 U FS 1: 50.178 6 Jul 2004 13:57:17 1.4336 W 228.16 pH W hp CH1 1: 50.076 6 Jul 2004 10:02:26 1.4336 W 95.473 pF W 1 000. 599 997 MHz PRm 2: 50.141 W 2.8203 W 2 GHz Cor 1 U FS hp 1 000. 000 000 MHz PRm S 11 2: 50.617 W -3.2188 W 2 GHz Cor 3: 50.213 W 3.8828 W 3 GHz 1 ↑ 3: 51.748 W -4.8027 W 3 GHz 4: 50.305 W 4.791 W 4 GHz 23 45 5: 50.563 W 5.2852 W 5 GHz START .030 000 MHz STOP 6 000. 000 000 MHz START log MAG CH1 S 21 2: Cor ↑ 3: -19.496 dB 3 GHz 4: -19.08 dB 4 GHz 5: 1 3 2 4 -19.771 dB 2 GHz -18.997 dB 5 GHz log MAG 6 Jul 2004 10: 01: 51 1: -39.782 dB 10 dB/ REF 0 dB hp 1 000. 000 000 MHz PRm STOP 6 000. 000 000 MHz RFA55DDLF40dB Attenuation 6 Jul 2004 13: 58: 11 1: -19.935 dB 10 dB/ REF 0 dB hp 5: 55.033 W -7.25 W 5 GHz .030 000 MHz RFA55DDLF20dB Attenuation CH1 S 21 4: 59.217 W -6.1836 W 4 GHz 1 ↑ 1 000. 599 997 MHz PRm 2: -39.753 dB 2 GHz 3: -40.632 dB 3 GHz 4: -39.283 dB 4 GHz Cor ↑ 5: -34.725` dB 5 GHz 5 5 1 START .030 000 MHz START STOP 6 000. 000 000 MHz .030 000 SWR 1 / STOP 6 000. 000 000 MHz RFA55DDLF40dB VSWR 6 Jul 2004 13: 57: 44 1: 1.0293 REF 1 4 MHz RFA55DDLF20dB VSWR CH1 S 11 3 2 CH1 S 11 SWR 1 / 6 Jul 2004 10: 02: 14 1: 1.0339 REF 1 hp hp 1 000. 599 997 MHz 1 000. 000 000 MHz PRm 2: Cor 1.0569 2 GHz PRm 2: 1.0677 2 GHz Cor 3: 1.1061 3 GHz 3: 1.0803 3 GHz 4: ↑ 5: 3 2 1 4 1.1001 4 GHz 1.1127 5 GHz ↑ .030 000 MHz 1.1443 4 GHz 5: 1.1831 5 GHz 5 STOP 6 000. 000 000 MHz © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com START 3 2 1 START 4: .030 000 MHz 4 5 STOP 6 000. 000 000 MHz RFAXX Series Issue February 2009 Sheet 2 of 4 High Frequency Surface Mount Attenuators Physical Data RFA53SDLF A A D D B E E D RFA84DDLF A E B C C RFA55DDLF E B D E RFA54DDLF A A B C E RFA84SDLF RFA55SDLF D E B A E D E RFA37DDLF B E D B E A C C C C Dimensions (mm) Model A B C D E RFA53SDLF 5.00 2.70 0.70 1.20 0.80 RFA54DDLF 5.00 3.80 0.70 1.20 0.80 RFA55SDLF 5.00 4.50 0.70 1.20 1.00 RFA55DDLF 5.00 4.50 0.70 1.20 1.00 RFA84SDLF 8.00 5.25 0.70 1.40 1.10 RFA84DDLF 8.00 5.25 0.70 1.40 1.10 RFA37DDLF 13.00 7.00 0.70 2.00 1.40 © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com RFAXX Series Issue February 2009 Sheet 3 of 4 High Frequency Surface Mount Attenuators Environmental Data Power Derating Curve Test Condition Maximum Load Life 1000 Hours, 70°C ±1.0% Moisture Load Life 1000 Hours, 40°C 95% RH ±1.0% 350°C, 3 sec. ±1.0% Solder Heat Resistance Solderability % Of Rated Power 100 60 >95% coverage 0 25° 70° 155° Ambient Temperature (°C) Ordering Data Prefix HFR - RFA53SDLF - 10dB G Z00 Model RFA53SDLF; RFA54DDLF; RFA55SDLF; RFA55DDLF RFA84SDLF; RFA84DDLF; RFA37DDLF Attenuation 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40dB Impedance Tolerance G = ±2% Packaging Z00 = 100 pcs/bulk package © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com RFAXX Series Issue February 2009 Sheet 4 of 4