HMC624LP4 / 624LP4E v02.0807 ATTENUATORS - SMT 10 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Typical Applications Features The HMC624LP4(E) is ideal for: 0.5 dB LSB Steps to 31.5 dB • Cellular/3G Infrastructure High Input IP3: +55 dBm • WiBro / WiMAX / 4G Low Insertion Loss: 2.2 dB @ 3.5 GHz • Microwave Radio & VSAT TTL/CMOS Compatible, Serial or Parallel Control • Test Equipment and Sensors ±0.25 dB Typical Step Error • IF & RF Applications Single +3V or +5V Supply Compact 4x4mm SMT Package Functional Diagram General Description The HMC624LP4(E) is a broadband 6-bit GaAs IC Digital Attenuator in a low cost leadless SMT package. This versatile digital attenuator incorporates off-chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. The dual mode control interface is CMOS/TTL compatible, and accepts either a three wire serial input or a 6 bit parallel word. The HMC624LP4(E) also features a user selectable power up state and a serial output port for cascading other Hittite serial controlled components. The HMC624LP4(E) is housed in a RoHS compliant 4x4 mm QFN leadless package, and requires no external matching components. Electrical Specifi cations, TA = +25° C, with Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted) Parameter Frequency (GHz) DC - 3.0 GHz 3.0 - 6.0 GHz Insertion Loss Attenuation Range 10 - 202 Min. Typ. Max. Units 1.8 2.8 2.4 3.8 dB dB 31.5 dB Return Loss (ATTIN, ATTOUT, All Atten. States) DC - 6.0 GHz 15 dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States DC - 0.8 GHz 0.8 - 6.0 GHz ± (0.10 + 5% of Atten. Setting) Max. ± (0.30 + 3% of Atten. Setting) Max. dB dB Input Power for 0.1 dB Compression DC - 6.0 GHz 30 dBm Input Third Order Intercept Point (Two-Tone Input Power= 10 dBm Each Tone) DC - 6.0 GHz 55 dBm For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Normalized Attenuation [1] (Only Major States are Shown) NORMALIZED ATTENUATION (dB) INSERTION LOSS (dB) 10 0 0 -1 -2 -3 +25 C +85 C -40 C -4 -5 -5 -10 -15 -20 -25 -30 -35 0 1 2 3 4 5 0 6 0.5 1 FREQUENCY (GHz) 1.5 2 2.5 3 3.5 Input Return Loss [1] Output Return Loss [1] (Only Major States are Shown) (Only Major States are Shown) 0 4.5 5 5.5 6 0 -5 -5 -10 -10 RETURN LOSS (dB) RETURN LOSS (dB) 4 FREQUENCY (GHz) -15 -20 -25 -30 -35 ATTENUATORS - SMT Insertion Loss vs. Temperature [1] -15 -20 -25 -30 -35 -40 -40 0 1 2 3 4 5 6 0 1 FREQUENCY (GHz) 2 3 4 5 6 5 6 FREQUENCY (GHz) Bit Error vs. Frequency [2] Bit Error vs. Attenuation State [2] (Only Major States are Shown) 1 2 0.8 1.5 0.6 BIT ERROR (dB) BIT ERROR (dB) 1 0.4 0.2 0 -0.2 -0.4 0.5 0 -0.5 -1 -0.6 -1.5 -0.8 -1 -2 0 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) 0 1 2 3 4 FREQUENCY (GHz) [1] Data taken with bias tees on input and output RF ports. [2] C1, C6 = 330pF For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 10 - 203 HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Worst Case Step Error Between Successive Attenuation States [2] 10 - 204 1 80 0.8 75 0.6 70 0.4 65 IP3 (dBm) STEP ERROR (dB) ATTENUATORS - SMT 10 IP3 vs. Temperature [2] 0.2 0 -0.2 60 55 50 -0.4 45 -0.6 40 -0.8 35 -1 30 0 1 2 3 4 FREQUENCY (GHz) 5 6 0 1 2 3 4 FREQUENCY (GHz) For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 5 6 HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Serial Mode The serial mode is enabled then P/S is set to high. Data is entered LSB first and after the 6th shift clock cycle the LE (Latch Enable) is pulsed High and then Low. See timing diagram below for reference. 10 ATTENUATORS - SMT Timing Diagram Timing Timing Diagram (Latched Parallel Mode) Symbol Vdd = +5V (Typ.) Units Serial Input Setup Time ts 20 ns Hold Time from Serial Input to Shift Clock th 20 ns Setup Time from Shift Clock to Latch Enable tlsup 40 ns Propagation Delay tpd 10 ns Setup Time for New Data tsnd 10 ns Parameter Parallel Mode (Direct Parallel Mode & Latched Parallel Mode) Direct Parallel Mode - The attenuation state is changed by the Control Voltage Inputs directly. The LE (Latch Enable) must be at a logic high to control the attenuator in this manner. Latched Parallel Mode - The attenuation state is selected using the Control Voltage Inputs and set while the LE is in the Low state. The attenuator will not change state while LE is Low. Once all Control Voltage Inputs are at the desired states the LE is pulsed. See timing diagram below for reference. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 10 - 205 HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Power-Up States ATTENUATORS - SMT 10 Parallel PUP Truth Table Using the Parallel PUP truth table the attenuator can be turned on at a specific attenuation state. By using the PUP1 and PUP2 line four different attenuation states can be selected. It can also be used in the Direct Parallel Mode using the Control Voltage Inputs to select attenuation values. P/S LE PUP2 PUP1 Attenuation State 0 0 0 0 31.5 dB 0 0 1 0 24 dB 0 0 0 1 16 dB 0 0 1 1 8 dB 0 1 X X 0.5 to 31.5 dB Note: Power-Up with LE= 1 provides normal parallel operation with D0 - D5, and PUP1 and PUP2 are not active. Truth Table Absolute Maximum Ratings RF Input Power (DC - 6 GHz) [1] 27 dBm (T = +85 °C) Control Voltage Input Attenuation State Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) -1.5V to (Vdd +1.5V) Vdc Bias Voltage (Vdd) 5.6 Vdc Channel Temperature 150 °C Continuous Pdiss (T = 85 °C) (derate 9.8 mW/°C above 85 °C) [1] 0.635 W Thermal Resistance 102 °C/W Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C [1] At max gain settling D5 D4 D3 D2 D1 D0 High High High High High High Reference I.L. High High High High High Low 0.5 dB High High High High Low High 1 dB High High High Low High High 2 dB High High Low High High High 4 dB High Low High High High High 8 dB Low High High High High High 16 dB Low Low Low Low Low Low 31.5 dB Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Bias Voltage TTL/CMOS Control Voltage Vdd (Vdc) Idd (Typ.) (mA) State Vdd= +3V or +5V 3 1.8 Low 0 to 0.8V 5 2.0 High 2.0V to Vdd ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS 10 - 206 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Outline Drawing ATTENUATORS - SMT 10 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 HMC624LP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC624LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] H624 XXXX [2] H624 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, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 10 - 207 HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Pin Descriptions ATTENUATORS - SMT 10 10 - 208 Pin Number Function 1 P/S 2 CLK 3 SERIN Description Interface Schematic See truth table, control voltage table and timing diagram. 4 LE 5, 14 GND These pins and package bottom must be connected to RF/DC ground. 6, 13 ATTIN, ATTOUT These pins are DC coupled and matched to 50 Ohms. Blocking capacitors are required. Select value based on lowest frequency of operation. 7 - 12 ACG1 - ACG6 External capacitors to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 15 SEROUT Serial input data delayed by 6 clock cycles. 16, 17 PUP2, PUP1 19 - 24 D5, D4, D3, D2, D1, D0 18 Vdd See truth table, control voltage table and timing diagram. Supply voltage For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Application Circuit ATTENUATORS - SMT 10 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 10 - 209 HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6.0 GHz Evaluation PCB ATTENUATORS - SMT 10 List of Materials for Evaluation PCB 117212 [1] Item Description J1 - J2 PCB Mount SMA Connector J3 14 Pin DC Connector C1, C6 330 pF Capacitor, 0402 Pkg. C7, C8 1000 pF Capacitor, 0402 Pkg. U1 HMC472LP4(E) Digital Attenuator PCB [2] 117210 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 10 - 210 The circuit board used in the final application should use RF circuit design techniques. Signal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be connected directly to the ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board shown is available from Hittite upon request. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC624LP4 / 624LP4E v02.0807 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6.0 GHz Notes: ATTENUATORS - SMT 10 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 10 - 211