HRF-AT4521 31.0 dB, DC - 2.5GHz, 5 Bit Serial Digital Attenuator The Honeywell HRF-AT4521 is a 5-bit digital attenuator that is ideal for use in broadband communication system applications that require accuracy, speed and low power consumption. The HRF-AT4521 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 1 dB To 31 dB Single Positive Power Supply Voltage Serial Data Interface 50 Ohm Impedance DC-coupled, bi-directional RF path Space Saving VQFN Surface Mount Packaging Lead-free, RoHS compliant and Green HRF-AT4521 in VQFN Package RF ELECTRICAL SPECIFICATIONS @ + 25oC Results @ VDD = 5.0 +/- 10%, VSS = 0 unless otherwise stated, Z0 = 50 Ohms Contact Honeywell for relative performance at other supply configurations Parameter Test Condition Insertion Loss 1dB Compression VSS = 0V, Input Power VSS = - 3V, Input Power Input IP3 VSS = 0V Two-tone inputs, up to +5 dBm @ 0 dBm attenuation Input IP3 Vss = -3V Two-tone inputs, up to + 5 dBm @ 0 dBm attenuation Return Loss Attenuation Accuracy Frequency Typical Maximum Units 1.0 GHz 2.0 GHz 2.5 GHz 2.0 2.2 2.8 2.6 2.8 3.4 dB dB dB 2.0 GHz 2.0 GHz 22 28 dBm dBm dBm 2.0 GHz 36 2.0 GHz Any Combination of Bits All attenuation states All attenuation states All attenuation states Minimum >36 -11 1.0 GHz 2.0 GHz 2.5 GHz -13 + (0.25 + 2.5 %), - (0.10 + 5.0 %) + 0.45, - (0.20 + 8.0 %) + 0.35, - (-0.40 + 10.5%) dBm dB dB dB dB Trise, Tfall Ton, Toff (Tpd) 10% To 90% 50% Cntl To 90%/10%RF T clock Period (Tprd) T high / T low = ½ minimum clock period 50 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 10 15 Note 1 - For higher accuracy designs, please consider HRF-AT4610/HRF-AT4611 nS nS HRF-AT4521 FUNCTIONAL SCHEMATIC S4 S3 S2 S1 S0 ESD, Buffer, Level Shift RF In RF Out 16dB 8dB 4dB 2dB 1dB DC ELECTRICAL SPECIFICATIONS @ + 25°C Parameter Minimum Typical VDD 3.31 5.0 VSS -5.0 IDD <5.0 CMOS Logic level (0) 0 CMOS Logic level (1) VDD – 0.8 Input Leakage Current Note 1, the performance curves are for VDD = +5.0 +/- 10% Maximum Units 5.5 V V uA V V uA 50 0.8 VDD 10 ABSOLUTE MAXIMUM RATINGS1 Parameter Absolute Maximum Units Input Power + 35 dBm VDD +6.0 V VSS -5.5 V ESD Voltage2 400 V O Operating Temperature -40 To +85 C O Storage Temperature -65 To +125 C O Moisture Sensitivity Level Level 3 @ 260 C Digital Inputs VDD+0.6 max to -0.6 min V Note 1 - Operation of this device beyond any of these parameters may cause permanent damage. Note 2 - Although the HRF-AT4521 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-AT4521 is immune to latch-up. 2 www.honeywell.com/microwave HRF- AT4521 PIN CONFIGURATIONS Pin Function Pin Function 1 2 3 4 5 6 7 8 VDD GROUND RF INPUT GROUND GROUND GROUND GROUND GROUND 9 10 11 12 13 14 15 16 GROUND RF OUTPUT GROUND VSS GROUND OE CLK DATA Note: Bottom ground plate must be grounded for proper RF performance. SERIAL DATA LOAD Serial data is shifted into the register on the rising edge of clock, MSB first. The state of “OE” will not affect the shifting of data. The rising edge of the “OE” signal will be the clock for the transfer of shifted data. Latched new data occurs one prop delay after the rising edge of “OE”. See the Electrical Spec Table for AC parameters. TRUTH TABLE S4 S3 S2 S1 S0 Output 0 0 0 0 0 1 1 0 0 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 1 0 0 0 0 1 Reference Input 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB Operation: Data on serial input D is clocked into internal registers on the low to high transition of the Clock signal (CK). The register output is enabled when Output Enable (OE) is in the low state. "0" = CMOS Low, "1" = CMOS High. www.honeywell.com/microwave 3 HRF-AT4521 PERFORMANCE CURVES Insertion Loss Typical AT4521 Reference Insertion Loss 0.0 - 40 C +25C + 85 C -0.5 3.3 V Insertion Loss (dB) -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 Frequency (GHz) Return Loss Typical AT4521 Input Return Loss 0 -5 Return Loss (dB) -10 -15 -20 -25 -30 0.0 0.5 1.0 1.5 2.0 2.5 Frequency (GHz) 4 www.honeywell.com/microwave HRF- AT4521 Step Accuracy Typical AT4521 Step Accuracy 1.0 0.8 Step Accuracy (dB) 0.6 0.4 1 dB 0.2 2 dB 0.0 4 dB -0.2 31 dB -0.4 1 dB 2 dB 4 dB 8 dB 31 dB 16 dB -0.6 -0.8 8 dB 16 dB -1.0 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 Frequency (GHz) Relative Accuracy Typical AT4521 Relative Accuracy 1.0 Relative Accuracy (dB) 0.0 16 dB 8 dB -1.0 31 dB -2.0 -3.0 -4.0 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB -5.0 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 Frequency (GHz) www.honeywell.com/microwave 5 HRF-AT4521 PACKAGE OUTLINE DRAWING Notes 1. Pin 1 identifier can be a combination or a dot and/or chamfer. 2. Dimensions are in millimeters. GREEN MATERIAL SET The –GR attenuators have a Green material set that can withstand a maximum soldering temperature of 260OC. LEAD FINISH The package leads are Nickel Palladium Gold (NiPdAu). The configuration being manufactured and delivered today is lead-free RoHS compliant. Compliant packages have half-etch leadframes and have date codes of 0300 or greater. LEAD FREE QFN SURFACE MOUNT APPLICATION Please see Application Note AN310 for assembly process recommendations. The maximum soldering temperature of the o o -GR is 260 C (-AU attenuators are 250 C). Application Notes can be found at our website: www.honeywell.com/microwave 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 AN311. 6 www.honeywell.com/microwave HRF- AT4521 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 10 minutes. CLK VDD Gnd Gnd Data OE VSS RF In HRF-AT4521 Evaluation Board Top View RF Out HRF-AT4521 Honeywell HRF-AT4521 Evaluation Board EVALUATION CIRCUIT BOARD LAYOUT DESIGN DETAILS Item Description PCB Attenuator Chip Capacitor RF Connector DC Pin Impedance Matched Multi-Layer FR4 HRF-AT4521 Digital Attenuator Panasonic Model ECU-E1C103KBQ Capacitor, .01uf 0402 10% 16V Johnson Connectors Model 142-0701-801 SMA RF Coaxial Connector Mil-Max Model 800-10-064-10-001 Header Pins ORDERING INFORMATION Ordering Number Delivery Method Units Per Shipment HRF-AT4521-GR-TR HRF-AT4521-GR-T HRF-AT4521-E Tape and Reel Tape Evaluation Board 2500 Units per Reel <2500 One Board Per Box The new –GR attenuators will replace and are fully back-compatible with the –AU attenuators. FIND OUT MORE For more information on Honeywell’s Microwave Products visit us online at www.honeywell.com/microwave or contact us at 800-323-8295 (763-954-2474 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 12001 Highway 55 Plymouth, MN 55441 Tel: 800-323-8295 www.honeywell.com/microwave www.honeywell.com/microwave Form #4521W September 2007 ©2007 Honeywell International Inc. 7