HMC425 v02.0907 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz 1 Typical Applications Features The HMC425 is ideal for: 0.5 dB LSB Steps to 31.5 dB Fiber Optics & Broadband Telecom Single Control Line Per Bit Microwave Radio & VSAT 0.5 dB Typical Bit Error Military Radios, Radar, & ECM Die Size: 1.5 x 0.85 x 0.1 mm Space Applications General Description Functional Diagram The HMC425 die is a broadband 6-bit GaAs IC digital attenuator MMIC chip. Covering 2.4 to 8 GHz, the insertion loss is less then 3.5 dB typical. The attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of 31.5 dB. Attenuation accuracy is excellent at 0.5 dB typical step error with an IIP3 of +40 dBm. Six control voltage inputs, toggled between 0 and +3 to +5V, are used to select each attenuation state. A single Vdd bias of +3 to +5V is required. Electrical Specifi cations, T = +25 C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted) A Parameter Frequency (GHz) Min. Typ. Max. Units 2.4 - 6.0 GHz 2.7 3.2 dB Insertion Loss 6.0 - 8.0 GHz 3.5 4.0 dB Attenuation Range 2.4 - 8.0 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) 2.4 - 8.0 GHz 12 15 dB Attenuation Accuracy: (Referenced to Insertion Loss) All States 2.4 - 8.0 GHz 0.4 + 4% of Atten. Setting Max dB Input Power for 0.1 dB Compression Vdd= 5V 22 dBm 2.4 - 8.0 GHz Vdd= 3V 19 dBm Input Third Order Intercept Point REF - 16.0 dB States 45 dBm 2.4 - 8.0 GHz (Two-Tone Input Power= 0 dBm Each Tone) 16.5 - 31.5 dB States 35 dBm Switching Characteristics 2.4 - 8.0 GHz tRISE, tFALL (10/90% RF) 160 ns tON/tOFF (50% CTL to 10/90% RF) 180 ns Information furnished by Analog Devices is believed to be accurate and reliable. However, no For price, delivery, and to place orders: Analog Devices, Inc., For price, delivery, and to place orders, please contact Hittite Microwave Corporation: responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 rights of third parties that may result from its use. Specifications subject to change without notice. No 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Phone: 781-329-4700 Order online at www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 1 - 14 Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D Order On-line at www.hittite.com ATTENUATORS - DIGITAL - CHIPHMC425 v02.0907 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz Return Loss RF1, RF2 (Only Major States are Shown) 1 Insertion Loss 0 0 -2 -5 0.5 dB 8 dB 1 dB 16 dB -4 -10 2 dB 31.5 dB 4 dB +25 C -6 -15 +85 C -55 C -8 -20 -10 -25 12 34 567 8 9 10 12 34 567 8 9 10 FREQUENCY (GHz) FREQUENCY (GHz) Normalized Attenuation (Only Major States are Shown) Bit Error vs. Attenuation State 2 0 2.4 GHz -5 3.5 GHz 5.5 GHz 1 8.0 GHz -10 -15 0 -20 0.5 dB 8 dB 1 dB 16 dB 2 dB 31.5 dB -25 4 dB -1 -30 -35 -2 12 34 567 8 9 10 0 4 8 12 16 20 24 28 32 FREQUENCY (GHz) ATTENUATION STATE (dB) Relative Phase vs. Frequency Bit Error vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 2 80 0.5 dB 8 dB 0.5 dB 1 dB 16 dB 60 1 dB 2 dB 31.5 dB 2 dB 4 dB 1 4 dB 8 dB 40 16 dB 31.5 dB 0 20 0 -1 -20 -2 -40 12 34 567 8 9 10 12 34 567 8 9 10 FREQUENCY (GHz) FREQUENCY (GHz) Information furnished by Analog Devices is believed to be accurate and reliable. However, no For price, delivery, and to place orders: Analog Devices, Inc., For price, delivery, and to place orders, please contact Hittite Microwave Corporation: responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 rights of third parties that may result from its use. Specifications subject to change without notice. No 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Phone: 781-329-4700 Order online at www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 1 - 15 Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D Order On-line at www.hittite.com BIT ERROR (dB) INSERTION LOSS (dB) NORMALIZED ATTENUATION (dB) BIT ERROR (dB) RELATIVE PHASE (deg) RETURN LOSS (dB) ATTENUATORS - DIGITAL - CHIP