HRF-AT db, DC - 4GHz, 6 Bit Parallel Digital Attenuator

Transcription

1 HRF-AT46 3.5, DC - 4GHz, 6 Bit Parallel Digital Attenuator The Honeywell HRF-AT46 is a 6-bit digital attenuator ideal for use in broadband communication system applications that require accuracy, speed and low power consumption. The HRF-AT46 is manufactured with Honeywell's patented Silicon On Insulator (SOI) CMOS manufacturing technology, which provides the performance of GaAs with the economy and integration capabilities of conventional CMOS. These attenuators are DC coupled to improve lower operating frequency, frequency response and reduce the number of DC bias points required. FEATURES Very Low DC Power Consumption Attenuation In Steps From.5 To 3.5 Single Positive Power Supply Voltage Parallel Data Interface 5 Ohm Impedance DC-coupled, bi-directional RF path Space Saving VQFN Surface Mount Packaging Lead-free, RoHS compliant and halogen-free HRF-AT46 in VQFN Package RF ELECTRICAL + 25 o C V DD = 5. +/- %, V SS = unless otherwise stated, Z = 5 Ohms Contact Honeywell for relative performance at other supply configurations Parameter Test Condition Frequency Minimum Typical Maximum Units Insertion Loss. GHz 2.5 GHz 3. GHz 4. GHz Compression V SS = V, Input Power V SS = -3V, Input Power 2. GHz 2. GHz m m Input IP3 V SS = V Two-tone inputs, up to +5 m attenuation 2. GHz 38 m Input IP3 V ss = -3V Two-tone inputs, up to +5 m attenuation 2. GHz Return Loss Any Bit or Combination - -3 Attenuation Accuracy. GHz 2.5 GHz 3. GHz 4. GHz >38 +/-( % of programmed IL) +/-( % of programmed IL) +/-( % of programmed IL) +/-( % of programmed IL) m Trise, Tfall Ton, Toff (Tpd) % To 9% 5% Cntl To 9% / %RF 5 ns ns T clock Period (Tprd) T high / T low = ½ minimum clock period 5 ns T data set up (Tsup) Set up to rising edge of clock 5 ns T data hold (Thld) Data hold after rising edge of clock 2 ns T latch set up (Tlsup) Data set up to rising edge of OE 5 ns

2 HRF-AT46 FUNCTIONAL SCHEMATIC S5 S4 S3 S2 S S ESD, Buffer, Level Shift RF In RF Out DC ELECTRICAL + 25 C Parameter Minimum Typical Maximum Units V DD V V SS -5. V I DD <5. 5 ua CMOS Logic level ().8 V CMOS Logic level () V DD.8 V DD V Input Leakage Current ua Note, the performance curves are for V DD = +5. +/- % ABSOLUTE MAXIMUM RATINGS Parameter Absolute Maximum Units Input Power + 35 m V DD +6. V V SS -5.5 V ESD Voltage 2 4 V Operating Temperature -4 To +85 Storage Temperature -65 To +25 Moisture Sensitivity Level Level 26 O C Digital Inputs V DD +.6 max to -.6 min V Note - Operation of this device beyond any of these parameters may cause permanent damage. Note 2 - Although the HRF-AT46 contains ESD protection circuitry on all digital inputs, precautions should be taken to ensure that the Absolute Maximum Ratings are not exceeded. Latch-Up: Unlike conventional CMOS digital attenuators, Honeywell's HRF-AT46 is immune to latch-up. O C O C 2

3 HRF- AT46 PIN CONFIGURATIONS Pin Function Pin Function VDD 3 GROUND 2 GROUND 4 GROUND 3 GROUND 5 RF OUTPUT 4 RF INPUT 6 GROUND 5 GROUND 7 VSS 6 GROUND 8 GROUND 7 GROUND 9 S 8 GROUND 2 S 9 GROUND 2 S2 GROUND 22 S3 GROUND 23 S4 2 GROUND 24 S5 Note: Bottom ground plate must be grounded for proper RF performance. TRUTH TABLE S5 S4 S3 S2 S S Operation: Data on parallel input S pins are independently buffered and presented to the RF attenuator circuits. "" = CMOS Low, "" = CMOS High. 3

4 Input Return Loss () Insertion Loss () HRF-AT46 PERFORMANCE CURVES Insertion Loss Typical AT46 Reference Insertion Loss. - 4 C C + 85 C 3.3 V Return Loss Typical AT46 Input Return Loss Attn Attn 3 Attn 9 Attn 3 Attn 2 Attn 5 Attn

5 Relative Accuracy () Step Accuracy () HRF- AT46 Step Accuracy Typical AT46 Step Accuracy Relative Accuracy Typical AT46 Relative Accuracy

6 HRF-AT46 PACKAGE OUTLINE DRAWING Notes. Pin identifier can be a combination or a dot and/or chamfer. A chamfer is on the bottom ground plane. 2. Dimensions are in millimeters. HALOGEN-FREE MATERIAL SET The FL attenuators have a Halogen-free material set that can withstand a maximum soldering temperature of 26 O C. LEAD FINISH The package leads are Nickel Palladium Gold with Silver flash (NiPdAu+Ag). The configuration being manufactured and delivered today is lead-free and RoHS compliant. Plating thicknesses are listed below in microns (um). Ni =.254 um min Pd =.254 um min Au+Ag =.58 um min Au Composition = 3% min to 7% max LEAD FREE QFN SURFACE MOUNT APPLICATION Please see Application Note AN3 for assembly process recommendations. The maximum soldering temperature of the - FL is 26 o C. Application Notes can be found at our website: CIRCUIT APPLICATION INFORMATION These attenuators require a DC reference to ground. They may not operate properly when AC coupled on both the RF input and output without a DC ground reference provided as part of the circuit. See Application Note AN3. 6

7 HRF- AT46 EVALUATION CIRCUIT BOARD Honeywell's evaluation board provides an easy to use method of evaluating the RF performance of our attenuator. Simply connect power, DC and RF signals to be measuring attenuator performance in less than minutes. VDD S5 Gnd Gnd S4 S3 S2 S S VSS RF In HRF-AT46 Evaluation Board Top View RF Out HRF-AT46 Honeywell HRF-AT46 Evaluation Board EVALUATION CIRCUIT BOARD LAYOUT DESIGN DETAILS Item PCB Attenuator Chip Capacitor RF Connector DC Pin Description Impedance Matched Multi-Layer FR4 HRF-AT46 Digital Attenuator Panasonic Model ECU-EC3KBQ Capacitor,.uf 42 % 6V Johnson Connectors Model SMA RF Coaxial Connector Mil-Max Model Header Pins ORDERING INFORMATION Ordering Number Delivery Method Units Per Shipment HRF-AT46-FL-TR HRF-AT46-E Tape & Reel Evaluation Board 25 Units per Reel One Board Per Box The new FL attenuators replace and are electrically equivalent to the GR attenuators. The GR attenuators are obsolete. FIND OUT MORE For more information on Honeywell s Microwave Products visit us online at or contact us at ( internationally). Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Honeywell 2 Highway 55 Plymouth, MN 5544 Form #46W Tel: May Honeywell International Inc. 7