HRF-AT4521 Preliminary 31.0 dB, DC-2.5GHz, 5 Bit Serial Digital Attenuator Features x x x x x x Very Low DC Power Consumption Attenuation In Steps From 1 dB To 31 dB Single Or Dual Power Supply Voltages Serial Data Interface 50 Ohm Compatible Impedance Space Saving VQFN Surface Mount Packaging Product Description 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. 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 Frequency Minimum Insertion Loss* Typical Maximum Units 2.0 2.2 2.8 24 2.6 2.8 3.4 dB dB dB dBm 1dB Compression* VSS = 0V, Input Power DC - 1.0 GHz 2.0 GHz 2.5 GHz DC - 2.5 GHz 1dB Compression* VSS = - VDD, Input Power DC - 2.5 GHz 29 dBm VSS = 0V Two-tone inputs DC - 2.5 GHz Up To +5 dBm @ 0 dBm Attenuation DC - 2.5 GHz Input IP3* Vss = - VDD Two-tone inputs Up To + 5 dBm @ 0 dBm Attenuation Return Loss* Any Combination of Bits DC - 2.5 GHz Attenuation Accuracy All attenuation states DC - 1.0 GHz (States < 8 dB are All attenuation states 2.0 GHz GBD*) All attenuation states 2.5 GHz Trise, Tfall* 10% To 90% Ton, Toff (Tpd) 50% Cntl To 90%/10%RF Transients In-Band T clock Period (Tprd)* T high / T low = 1/2 minimum clock period T data set up (Tsup)* Set up to rising edge of clock T data hold (Thld)* Data hold after rising edge of clock T latch set up (Tlsup)* Data set up to rising edge of OE 0.01uF Decoupling Capacitors Required On Power Supply Rails. *Guaranteed by design **For higher accuracy designs, please consider HRFAT4610/HRF-AT4611 38 dBm >38 dBm 11 13 +/-(0.45 + 3.0% of programmed IL) +/-(0.55 + 4.5% of programmed IL) +/-(0.6 + 8% of programmed IL)** 10 15 30 50 5 2 5 dB dB dB dB nS nS mV nS nS nS nS Input IP3* ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 1 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Functional Schematic CLK DATA OE ESD, Registers, Buffer, Level Shift RF In RF Out 16dB 8dB 4dB 2dB 1dB DC Electrical Specifications @ + 25oC Parameter Minimum VDD 3.3 1 VSS IDD Power Supply Current 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% Typical 5.0 Maximum 5.5 -5.0 35 0.8 VDD 10 Units V V uA V V uA Absolute Maximum Ratings2 Parameter Input Power VDD VSS ESD Voltage Operating Temperature Storage Temperature Digital Inputs Absolute Maximum + 35 +6.0 -5.5 400 -40 To +85 -65 To +125 VDD+0.6 max to -0.6 min Units dBm V V V Degrees C Degrees C V (Note 2) Operation of this Device beyond any of these parameters may cause permanent damage. Latch-Up: Unlike conventional CMOS digital attenuators, Honeywells' HRF-AT4521 is immune to latch-up. ESD Protection: Although the HRF-AT4521 contains ESD protection circuitry on all digital inputs, conventional precautions should be taken to ensure that the Absolute Maximum Ratings are not exceeded. ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 2 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Package Outline Drawing This package conforms to the JEDEC Standard MO-220, 4 x 4 mm 16 lead body dimensions. See Application Note 310, VQFN Surface Mount Application, on our web site at www.mysoiservices.com for assembly recommendations. Pin Configuration 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. ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 3 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Truth Table S4 0 0 0 0 0 1 1 S3 0 0 0 0 1 0 1 S2 0 0 0 1 0 0 1 S1 0 0 1 0 0 0 1 S0 0 1 0 0 0 0 1 Output 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. 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 switch performance in less than 10 minutes. HRF-AT4521 Evaluation Board Evaluation Circuit Board Layout Design Details Item PCB Attenuator Chip Capacitor RF Connector DC Pin Description 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 ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 4 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Evaluation Circuit Board Connections VDD CLK Gnd Gnd Data OE VSS HRF-AT4521 Evaluation Board Top View RF In RF Out HRF-AT4521 Honeywell Performance Curves Insertion Loss This Insertion Loss curve represents the Min/Max conditions for the "0" pass state versus all processing and temperature conditions. The Min case is at -40C with the "Fast" processing conditions. The Max case is at +85C with the "Slow" processing conditions. All other combinations fall within that band. The typical 25C case is labeled +25C TT. ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 5 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Return Loss This Return Loss set of curves represents the combination of all Return Loss cases for all attenuation settings. All cases are better than -14dB Return Loss at 4GHz. Attenuation State Accuracy The Attenuation Accuracy curve with vertical axis of +/- 1dB shows all states better than +/0.5dB to 2GHz and better than +/- 0.8dB to 4GHz. ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 6 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Compression The P1dB curve shows all states with a P1dB compression at approximately 23dB input power. The conditions for this curve are Vdd = +5.0v and Vss = 0v. For higher P1dB compression values, supply Vss with a negative voltage as shown in the next curve. The P1dB curve shows all states with a P1dB compression at approximately 31dB input power. The conditions for this curve are Vdd = +5.0v and Vss = -5.0v. ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 7 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295 HRF-AT4521 Preliminary Ordering Information Ordering Number HRF-AT4521-TR HRF-AT4521-E Delivery Method On Tape And Reel3 On Individual Engineering Evaluation Board Units Per Shipment 2500 Units per Reel One Board Per Box (Note 3) Call Honeywell for details 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. ________________________________________________________________________________________________________ Web Site: Email: www.mysoiservices.com mysoiservices@honeywell.com 2004 4521W Published August 2004 Page 8 Honeywell Solid State Electronics Center 12001 State Highway 55 Plymouth, Minnesota 55441-4799 1-800-323-8295