TE Analog Devices Welcomes Hittite Microwave Corporation O B SO LE NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED www.analog.com www.hittite.com TE O B SO LE THIS PAGE INTENTIONALLY LEFT BLANK HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Typical Applications Features The HMC271ALP4(E) is ideal for: 1 dB LSB Steps to 31 dB • Cellular/3G Infrastructure CMOS Compatible Serial Data Interface • Fixed Wireless, WiMax & WiBro SPI Compatible Serial Output • Test Instrumentation ±0.4 dB Typical Bit Error 24 Lead 4x4mm QFN Package: 16mm² TE Included in the HMC-DK004 Designer’s Kit Functional Diagram General Description LE The HMC271ALP4(E) is a broadband 5-bit positive control GaAs IC digital attenuator with CMOS compatible serial-to-parallel drivers in a low cost leadless QFN 4x4 mm SMT package. Covering 0.7 to 3.7 GHz, the insertion loss is typically less than 2.5 dB. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Accuracy is excellent at ± 0.4 dB typical with an IIP3 of up to +48 dBm. Five bit CMOS compatible serial control words are used to select each attenuation state. A single Vcc bias of +3V to +5V applied through an external 5 kOhm resistor is required. B SO Attenuators - DIGITAL - SMT 8 Electrical Specifications, TA = +25° C, Vcc = +3V to +5V Typical Max. Units Insertion Loss 0.7 - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 3.7 GHz Frequency 1.9 2.3 2.6 2.8 2.4 2.8 3.1 3.3 dB dB dB dB Attenuation Range 0.7 - 3.7 GHz 31 dB Return Loss (RF1 & RF2, All Atten. States) 0.7 - 1.4 GHz 1.4 - 2.7 GHz 2.7 - 3.7 GHz 12 15 16 dB dB dB 0.7 - 0.9 GHz 0.9 - 2.2 GHz 2.2 - 3.7 GHz ± (0.4 + 5% of Atten. Setting) Max ± (0.4 + 4% of Atten. Setting) Max ± (0.4 + 6% of Atten. Setting) Max dB dB dB O Parameter Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States Min. Input Power for 0.1 dB Compression Vcc = 5V Vcc = 3V 0.7 - 3.7 GHz 24 22 dBm dBm Input Third Order Intercept Point (Two-tone Input Power = 0 dBm Each Tone) Vcc = 5V Vcc = 3V 0.7 - 3.7 GHz 48 46 dBm dBm 0.7 - 3.7 GHz 750 830 ns ns Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (Latch Enable to 10/90% RF) 8-1 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz (Only Major States are Shown) RETURN LOSS (dB) -5 -1.5 -2 -3 1 1.5 2 2.5 3 3.5 2 dB 0.5 4 I.L. 1 1.5 2 2.5 3 LE -5 1.5 0.9 GHz -10 1 1.5 2 2.5 3 3.5 1.9 GHz 2.4 GHz 0.5 0 -0.5 3.5 GHz -1 0 4 4 8 12 16 20 (Only Major States are Shown) O Relative Phase vs. Frequency (Only Major States are Shown) 4 32 75 16 dB 8 dB RELATIVE PHASE (deg.) BIT ERROR (dB) 28 100 3 1 24 ATTENUATION STATE (dB) Bit Error vs. Frequency 1, 2, 4 dB 31 dB 0 50 31 dB 16 dB 25 0 -25 -50 1, 2, 4, 8 dB -75 -1 0.5 4 1 FREQUENCY (GHz) 2 3.5 2 B SO NORMALIZED ATTENUATION (dB) -20 Bit Error vs. Attenuation State 0 -35 0.5 -15 FREQUENCY (GHz) (Only Major States are Shown) -30 31 dB 1 dB Normalized Attenuation -25 8 dB -30 FREQUENCY (GHz) -20 4 dB -25 -3.5 -15 16 dB -10 TE -2.5 BIT ERROR (dB) INSERTION LOSS (dB) +25C +85C -40C -1 Attenuators - DIGITAL - SMT 0 0 -0.5 -4 0.5 8 Return Loss RF1, RF2 Insertion Loss -100 1 1.5 2 2.5 FREQUENCY (GHz) 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40°C to +85°C). For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-2 HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz 8 Worst Case Step Error Between Successive Attenuation States Digital Control Voltages 0.8 State Vcc = +5V Vcc = +3V Low 0 to 1.3V 0 to 0.7V High 3.5 to 5V 2.3 to 3V 0.4 Serial Input Truth Table 0 Latch Enable -0.4 -0.8 -1.2 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) Timing Symbol Vcc = +5V Vcc = +3V X X L Shift register cleared X á H Shift register clocked á X H Contents of shift register transferred to Digital Attenuator Min. Max. Min. Max. - 100 - ns Hold time from Serial Input to Shift Clock th 0 - 5 - ns B SO 20 tlsup 40 - 100 - Serial Data Input Units ts ns Propagation delay, Latch Enable to C1 through C16 tpd - 30 - 70 ns Setup time from Reset to Shift Clock - 20 - 50 - ns fclk - 30 - 10 MHz Clock Frequency (1/tclk) Function Truth Table Serial Input Setup Time Setup time from Shift Clock to Latch Enable Reset LE Parameter Shift Clock TE STEP ERROR (dB) Attenuators - DIGITAL - SMT 1.2 Attenuation Setting RF1 - RF2 C1 C2 C4 C8 C16 High High High High High Reference I.L. Low High High High High 1 dB High Low High High High 2 dB High High Low High High 4 dB High High High Low High 8 dB High High High High Low 16 dB Low Low Low Low Low 31 dB Max. Atten. Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. O Timing Diagram 8-3 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz TE LE B SO Attenuators - DIGITAL - SMT 8 Logic / Functional Diagram O Programming Example to Select 1 dB Attenuation State For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-4 HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Pin Descriptions Function Description 1, 3, 4, 6, 10, 12, 13, 15, 16, 18 N/C These pins are not connected internally. However, all data shown herein was measured with these pins connected to RF/DC Ground. 2, 17 RF1, RF2 This pin is DC coupled and matched to 50 Ohms Blocking capacitors are required. Select value based on lowest frequency of operation. 5 Serial Output Serial data output. Serial input data delayed by 8 clock cycles. Interface Schematic LE TE Pin Number B SO Attenuators - DIGITAL - SMT 8 7 Reset See truth table, control voltage table and timing diagram. Shift Clock 9 Latch Enable 11 Serial Input 14 Vcc Supply Voltage. 19 - 24 GND Package bottom has an exposed metal paddle that must also be connected to RF/DC Ground. O 8 8-5 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz TE LE B SO Attenuators - DIGITAL - SMT 8 Application Circuit O DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specific frequency to pass with minimal loss. R1 = 5 kOhm is required to supply voltage to the circuit through either PIN 2 or PIN 17. For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-6 HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz Absolute Maximum Ratings -0.5 to (Vcc + 0.5) V Digital Outputs (Serial Output) -0.5 to (Vcc + 0.5) V DC Current on Serial Output ±35 mA Bias Voltage (Vcc) +5.6 V Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C RF Input Power (0.7 - 3.7 GHz) +26 dBm ESD Sensitivity (HBM) Class 1A LE Outline Drawing ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS TE Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) B SO Attenuators - DIGITAL - SMT 8 NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY O 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 HMC271ALP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] HMC271ALP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] Package Marking [3] H271A XXXX H271A XXXX [1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX 8-7 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC271ALP4 / 271ALP4E v02.0311 1 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz TE LE B SO Attenuators - DIGITAL - SMT 8 Evaluation Circuit Board O List of Materials for Evaluation PCB 108782 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 18 Pin DC Connector J6, J7 DC Pin C1, C2 100 pF Capacitor, 0402 Pkg. C3 0.01 µF Capacitor, 0402 Pkg. R1 5 kOhm Resistor, 0402 Pkg. U1 HMC271ALP4(E) Digital Attenuator PCB [2] 108780 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB The circuit board used in the application should use RF circuit design techniques. Signal lines should have 50 Ohm impedance while the package ground leads and exposed ground paddle should be connected directly to the ground plane similar to that shown below. A sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board as shown is available from Hittite Microwave Corporation upon request. [2] Circuit Board Material: Rogers 4350 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 8-8