HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL DeAsviganilearb’sle Kit SERIAL CONTROL ATTENUATOR, DC - 4 GHz Typical Applications Features the HMC542AlP4(e) is ideal for: 0.5 dB LSB Steps to 31.5 dB t • Cellular/PCS/3G Infrastructure TTL/CMOS Compatible Serial Data Interface M • ISM, MMDS, WLAN, WiMAX, & WiBro SPI Compatible Serial Output s ± 0.25 dB Typical Step Error • Microwave Radio & VSAT - Single +5V Supply l • Test Equipment and Sensors A 24 Lead 4x4mm QFN Package: 16mm² t i g Functional Diagram General Description Di The HMC542ALP4(E) is a broadband 6-bit GaAs IC digital attenuator with a CMOS compatible serial - to parallel driver in low cost leadless surface mount s package. This serial control digital attenuator incorp r rates off chip AC ground capacitors for near DC opera- o tion, making it suitable for a wide variety of RF and t A IF applications. Covering DC to 4 GHz, the inser- u tion loss is 1.5 dB and the attenuator bit values are n 0.5 (LSB), 1, 2, 4, 8, and 16 dB for a total attenua- e tion of 31.5 dB. Attenuation accuracy is excellent at t ±0.25 dB typical step error with an IIP3 of +45 dBm. t Six bit serial control words are used to select each A attenuation state. A single Vdd bias of +5V is required. Electrical Specifications, T = +25° C, with Vcc = +5V A Parameter Frequency (GHz) Min. Typ. Max. Units DC - 1.5 GHz 1.2 1.5 dB Insertion Loss 1.5 - 3.0 GHz 1.5 1.8 dB 3.0 - 4.0 GHz 1.8 2.3 dB Attenuation Range DC - 4.0 GHz 31.5 dB Return Loss (RF1 & RF2, All Atten. States) DC - 4.0 GHz 17 dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States DC - 1.0 GHz ± (0.20 + 3% of Atten. Setting) Max. dB 0.5 - 3.5 dB States 1.0 - 2.2 GHz ± (0.25 + 3% of Atten. Setting) Max. dB 4.0 - 31.5 dB States 1.0 - 2.2 GHz ± (0.15 + 4% of Atten. Setting) Max. dB All Attenuation States 2.2 - 3.0 GHz ± (0.30 + 3% of Atten. Setting) Max dB 0.5 - 3.5 dB States 3.0 - 4.0 GHz ± (0.15 + 5% of Atten. Setting) Max dB 4.0 - 31.5 dB States 3.0 - 4.0 GHz ± (0.50 + 5% of Atten. Setting) Max. Input Power for 0.1 dB Compression 0.1 - 4.0 GHz 20 dBm Input Third Order Intercept Point 0.1 - 1.5 GHz 35 dBm (Two-Tone Input Power= 0 dBm Each Tone) 1.5 - 4.0 GHz 45 dBm Switching Characteristics DC - 4.0 GHz tRISE, tFALL (10/90% RF) 800 ns tON, tOFF (50% CTL to 10/90% RF) 900 ns For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 1 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Return Loss RF1, RF2 Insertion Loss (Only Major States are Shown) 0 0 -5 t -0.5 SS (dB) -1 S (dB)--1150 0.5-16 dB sM ON LO-1.5 N LOS-20 - INSERTI -2 ++2855 CC RETUR--3205 31.5 dB tAl -2.5 -40 C i -35 g -3 -40 i D 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) FREQUENCY (GHz) - s r Normalized Attenuation o (Only Major States are Shown) Bit Error vs. Attenuation State t 0 1.2 A B) 1 3.6 GHz u d -5 ON ( 0.8 n TENUATI--1150 OR (dB) 000...246 40 MHz 3 GHz 1 GHz 500 MHz te T R t A R 0 D -20 E A E T -0.2 ALIZ-25 BI-0.4 M R -0.6 O-30 N -0.8 2 GHz 100 MHz -35 -1 0 0.5 1 1.5 2 2.5 3 3.5 4 0 4 8 12 16 20 24 28 32 FREQUENCY (GHz) ATTENUATION STATE (dB) Bit Error vs. Frequency Relative Phase vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 2 80 1.5 60 R (dB) 0.51 0.5-8B 31.5 dB ASE (deg) 40 31.5 dB O H 16 dB R 0 P 20 R E 8 dB E V T -0.5 TI BI LA 0 -1 RE 16 dB -20 -1.5 0.5-4 dB -2 -40 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) FREQUENCY (GHz) For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 2 Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Worst Case Step Error Between Successive Attenuation States Digital Control Voltages 1 State Vcc = +5V 0.8 t Low 0 to 1.3V M 0.6 B) 0.4 High 3 to 5V s R (d 0.2 O Serial Input Truth Table Al - STEP ERR--00..420 ELnaatcbhle CSlhoicftk Reset Function t -0.6 X X l Shift register cleared i g -0.8 X á H Shift register clocked Di -1 Contents of shift register 0 0.5 1 1.5 2 2.5 3 3.5 4 á X H transferred to Digital - FREQUENCY (GHz) Attenuator s r Timing Truth Table o t Symbol Vcc = +5V Units Control Voltage Input Attenuation A Parameter State u Min. Max. C16 C8 C4 C2 C1 C0.5 RF1 - RF2 n Serial Input Setup Time ts 20 - ns Reference High High High High High High i.l. e Hold time from Serial th 0 - ns t Input to Shift Clock High High High High High Low 0.5 dB t Setup time from Shift High High High High Low High 1 dB tlsup 40 - ns A Clock to Latch Enable High High High Low High High 2 dB Latch Enable Window, High High Low High High High 4 dB Latch Enable to C0.5 tpd - 30 ns through C8 High Low High High High High 8 dB Setup time from Reset to Low High High High High High 16 dB - 20 - ns Shift Clock Low Low Low Low Low Low 31.5 dB Clock Frequency fclk - 30 MHz Any combination of the above states will provide an attenuation (1/tclk) approximately equal to the sum of the bits selected. Timing Diagram For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 3 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Logic / Functional Diagram t M s - l A t i g i D - s r o t A u n e t t A Programming Example to Select 16 dB Attenuation State For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 4 Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Pin Descriptions Pin Number Function Description Interface Schematic t These pins are not connected internally. However, all data 1, 3, 5, 14, M 16-18, 23 N/C shown herein was measured with these pins connected to RF/DC Ground. s - 2 Vcc Supply Voltage. l A t This pin is DC coupled and matched to 50 Ohms i 4, 15 RF1, RF2 Blocking capacitors are required. Select value based on g lowest frequency of operation. i D External capacitor to ground is required. Select value for - 6 - 11, 13 ACg1 - ACg7 lowest frequency of operation. Place capacitor as close to pins as possible. s r This pin is not connected internally and any connection made 12 N/C to it externally will have no effect on product performance. o t A u n e Serial data output. Serial input data 19 Serial Output t delayed by 8 clock cycles t A 20 Reset See truth table, control voltage table and timing diagram. 21 Shift Clock 22 Latch Enable 24 Serial Input Package bottom has an exposed metal paddle gnD that must be connected to RF/DC Ground. For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 5 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Application Circuit t M s - l A t i g i D - s r o t A u n e t t A For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Absolute Maximum Ratings Bias Voltage RF Input Power (DC - 4.0 GHz) +27 dBm (T = +85 °C) Vcc (V) Idd (Typ.) (mA) t Digital Inputs (Reset, Shift Clock, +4.5 4.7 -0.5 to (Vcc +0.5) V M Latch Enable & Serial Input) +5.0 5.0 Bias Voltage (Vcc) +5.6 V s +5.5 5.3 Channel Temperature 150 °C - Continuous Pdiss (T = 85 °C) l 0.5 W (derate 7.7 mW/°C above 85 °C) A Thermal Resistance 130 °C/W ELECTROSTATIC SENSITIVE DEVICE t OBSERVE HANDLING PRECAUTIONS i Storage Temperature -65 to +150 °C g Operating Temperature -40 to +85 °C i D - s Outline Drawing r o t A u n e t t A notes: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DiMensions Are in inCHes [MilliMeters] 3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE. 4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM. PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM. 5. PACKAGE WARP SHALL NOT EXCEED 0.05mm. 6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED lAnD PAttern. Package Information Part Number Package Body Material Lead Finish MSL Rating Package Marking [3] HMC542AlP4 Low Stress Injection Molded Plastic Sn/Pb Solder Msl1 [1] H542A XXXX HMC542AlP4e RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn Msl1 [2] H542A XXXX [1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 7 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC542ALP4 / 542ALP4E v06.0312 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz Evaluation PCB t M s - l A t i g i D - s r o t A u n e t t A List of Materials for Evaluation PCB 114399 [1] The circuit board used in the application should Item Description use RF circuit design techniques. Signal lines J1 - J2 PCB Mount SMA Connector should have 50 Ohm impedance while the package J3 18 Pin DC Connector ground leads and exposed paddle should be J4, J5 DC Pin connected directly to the ground plane similar to that C1 1000 pF Capacitor, 0603 Pkg. shown. A sufficient number of via holes should be C2, C3 1000 pF Capacitor, 0402 Pkg. used to connect the top and bottom ground planes. C4 - C7 330 pF Capacitor, 0402 Pkg. The evaluation circuit board shown is available from u1 HMC542ALP4(E) Digital Attenuator Hittite upon request. PCB [2] 114398 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 or Arlon 25FR For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 8 Application Support: Phone: 978-250-3343 or apps@hittite.com