HMC624LP4 624LP4E / v12.0812 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 t M • Cellular/3G Infrastructure Power-Up State Selection s • WiBro / WiMAX / 4G High Input IP3: +55 dBm - • Microwave Radio & VSAT Low Insertion Loss: 2.2 dB @ 3.5 GHz s TTL/CMOS Compatible, Serial, Parallel • Test Equipment and Sensors r or Latched Parallel Control o • IF & RF Applications ±0.25 dB Typical Step Error t Single +3V or +5V Supply A u 24 Lead 4x4mm SMT Package: 16mm2 n e Functional Diagram General Description t t The HMC624LP4(E) is a broadband 6-bit GaAs IC A 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 Specifications, T = +25° C, 50 Ohm System, with Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted) A Parameter Frequency (GHz) Min. Typ. Max. Units DC - 3 GHz 1.8 2.4 dB Insertion Loss 3.0 - 6.0 GHz 2.8 3.8 dB Attenuation Range 31.5 dB Return Loss (ATTIN, ATTOUT, All Atten. States) DC - 6 GHz 15 dB Attenuation Accuracy: (Referenced to Insertion Loss) DC - 0.8 GHz ± (0.10 + 5% of Atten. Setting) Max. dB All Attenuation States 0.8 - 6.0 GHz ± (0.30 + 3% of Atten. Setting) Max. dB Input Power for 0.1 dB Compression DC - 6 GHz 30 dBm Input Third Order Intercept Point DC - 6 GHz 55 dBm (Two-Tone Input Power = 10 dBm Each Tone) Switching Speed tRise, tFall (10 / 90% RF) DC - 6 GHz 100 ns rON , tOFF (50% LE to 10 / 90% RF) 150 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Normalized Attenuation [1] Insertion Loss vs. Temperature [1] (Only Major States are Shown) 0 0 t B) -1 N (d -5 8 dB M B) O s N LOSS (d -2 TTENUATI--1150 16 dB s - O A TI -3 D -20 r R E E Z INS -4 ++2855 CC RMALI-25 31.5 dB to -40 C O-30 N A -5 -35 u 0 1 2 3 4 5 6 0 1 2 3 4 5 6 n FREQUENCY (GHz) FREQUENCY (GHz) e t Input Return Loss [1] Output Return Loss [1] t (Only Major States are Shown) (Only Major States are Shown) A 0 0 -5 -5 B)-10 B)-10 d d S (-15 IL S (-15 OS OS 2 dB N L-20 N L-20 R R U-25 U-25 T T E E R R 31.5 dB -30 -30 16 dB 1 dB -35 -35 31.5 dB 8 dB 16 dB -40 -40 0 1 2 3 4 5 6 0 1 2 3 4 5 6 FREQUENCY (GHz) FREQUENCY (GHz) Bit Error vs. Frequency [2] Bit Error vs. Attenuation State [2] (Only Major States are Shown) 1 2 500MHz 0.8 1.5 4GHz 31.5 dB 0.6 1 B)0.4 B) R (d0.2 R (d 0.5 O O R 0 R 0 R R T E-0.2 T E-0.5 BI-0.4 BI 2GHz, 3GHz 100MHz, 1GHz -1 -0.6 -1.5 -0.8 -1 -2 0 1 2 3 4 5 6 0 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) FREQUENCY (GHz) [1] Data taken with bias tees on input and output RF ports. Vdd = +5V & Vctl = 0/+5V. [2] C1, C6 = 330pF. Vdd = +5V & Vctl = 0/+5V. [3] C1, C6 = 330pF. Vdd = +3V & Vctl = 0/+3V. 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Worst Case Step Error Between Successive Attenuation States [2] IP3 @ Major Attenuation States [2] 1 70 t 0.8 M 0.6 s 8 dB 60 B) 0.4 - R (d 0.2 m) rs P ERRO-0.20 IP3 (dB 50 E o ST-0.4 4 dB 16 dB 40 t -0.6 A -0.8 u -1 30 0 1 2 3 4 5 6 0 1 2 3 4 5 6 n FREQUENCY (GHz) FREQUENCY (GHz) e t t IP3 vs. Temperature, Min. Attn State [2] P0.1dB vs. Temperature, Min. Attn State [2] A 70 40 35 60 m) m) B 30 IP3 (dB 50 0.1dB (d 25 P 40 ++-428055 CCC 20 ++-428055 CCC 30 15 0 1 2 3 4 5 6 0 1 2 3 4 5 6 FREQUENCY (GHz) FREQUENCY (GHz) IP3 vs. Temperature, Min. Attn State [2] P0.1dB vs. Temperature, Min. Attn State [2] (Low Frequency Detail) (Low Frequency Detail) 70 40 35 60 m) m) B 30 IP3 (dB 50 0.1dB (d 25 P 40 ++-428055 CCC 20 ++-428055 CCC 30 15 0 0.1 0.2 0.3 0.4 0.5 0 0.1 0.2 0.3 0.4 0.5 FREQUENCY (GHz) FREQUENCY (GHz) [1] Data taken with bias tees on input and output RF ports. Vdd = +5V & Vctl = 0/+5V. [2] C1, C6 = 330pF. Vdd = +5V & Vctl = 0/+5V. [3] C1, C6 = 330pF. Vdd = +3V & Vctl = 0/+3V. 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz IP3 vs. Temperature, Min. Attn State [3] P0.1dB vs. Temperature, Min. Attn State [3] 70 40 t 35 60 M m) s m) B 30 IP3 (dB 50 0.1dB (d 25 s - P 40 ++-428055 CCC 20 ++-428055 CCC or t 30 15 A 0 1 2 3 4 5 6 0 1 2 3 4 5 6 u FREQUENCY (GHz) FREQUENCY (GHz) n IP3 vs. Temperature, Min. Attn State [3] P0.1dB vs. Temperature, Min. Attn State [3] e (Low Frequency Detail) (Low Frequency Detail) t 70 40 t A 35 60 m) m) B 30 IP3 (dB 50 0.1dB (d 25 P 40 +25 C +85 C 20 +25 C -40 C +85 C -40 C 30 15 0 0.1 0.2 0.3 0.4 0.5 0 0.1 0.2 0.3 0.4 0.5 FREQUENCY (GHz) FREQUENCY (GHz) Serial Control Interface The HMC624LP4E contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). The serial control interface is activated when P/S is kept high. The 6-bit serial word must be loaded MSB first. The positive-edge sensitive CLK and LE requires clean transitions. If mechanical switches are used, sufficient debouncing should be provided. When LE is high, 6-bit data in the serial input register is transferred to the attenuator. When LE is high CLK is masked to prevent data transition during output loading. When P/S is low, 3-wire SPI interface inputs (SERIN, CLK, LE) are disabled and the input register is loaded with parallel digital inputs (D0-D5). When LE is high, 6-bit parallel data changes the state of the part per truth table. For all modes of operations, the state will stay constant while LE is kept low. 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Timing Diagram (Latched Parallel Mode) Parameter Min. [1] Typ. [1] t Min. serial period, t 70 ns M SCK s Control set-up time, tCS 15 ns Control hold-time, tCH 20 ns - LE setup-time, t 15 ns s LN Min. LE pulse width, t 10 ns r LEW Min LE pulse spacing, t 630 ns o LES Serial clock hold-time from LE, t 10 ns t CKN A Hold Time, tPH. 0 ns u Parallel Mode Latch Enable Minimum Width, tLEN 10 ns n Setup Time, t 2 ns (Direct Parallel Mode & Latched Parallel Mode) PS e Note: The parallel mode is enabled when P/S is set to low. t t Direct Parallel Mode - The attenuation state is changed by the control voltage inputs D0-D5 directly. The LE (Latch A Enable) must be at a logic high at all times to control the attenuator in this manner. Latched Parallel Mode - The attenuation state is selected using the control voltage inputs D0-D5 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 above for reference. Power-Up States PUP Truth Table If LE is set to logic LOW at power-up, the logic state of LE PUP1 PUP2 Relative Attenuation PUP1 and PUP2 determines the power-up state of the 0 0 0 -31.5 part per PUP truth table. If the LE is set to logic HIGH 0 1 0 -24 at power-up, the logic state of D0-D5 determines the 0 0 1 -16 power-up state of the part per truth table. The attenu- 0 1 1 Insertion Loss ator latches in the desired power-up state approxi- 1 X X 0 to -31.5 dB mately 200 ms after power-up. Note: The logic state of D0 - D5 determines the power- up state per truth table shown below when LE is high Power-On Sequence at power-up. The ideal power-up sequence is: GND, Vdd, digital inputs, RF inputs. The relative order of the digital Truth Table inputs are not important as long as they are powered after Vdd / GND Control Voltage Input Reference Insertion D5 D4 D3 D2 D1 D0 Loss Bias Voltage High High High High High High 0 dB Vdd (V) Idd (Typ.) (mA) High High High High High Low -0.5 dB 3 1.8 High High High High Low High -1 dB 5 2.0 High High High Low High High -2 dB Control Voltage Table High High Low High High High -4 dB High Low High High High High -8 dB State Vdd = +3V Vdd = +5V Low High High High High High -16 dB Low 0 to 0.5V @ <1 µA 0 to 0.8V @ <1 µA Low Low Low Low Low Low -31.5 dB High 2 to 3V @ <1 µA 2 to 5V @ <1 µA Any combination of the above states will provide an attenuation equal to the sum of the bits selected. [1] Vdd = 5V 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Absolute Maximum Ratings RF Input Power (DC - 6 GHz) 28 dBm (T = +85 °C) t ELECTROSTATIC SENSITIVE DEVICE DLEig, itPaUl IPn1p,u PtsU (PP2/S, D, C0L-DK5, )SERIN, -0.5 to Vdd +0.5V OBSERVE HANDLING PRECAUTIONS M s Bias Voltage (Vdd) 5.6V - Channel Temperature 150 °C s Continuous Pdiss (T = 85 °C) (derate 9.8 mW/°C above 85 °C) [1] 0.635 W r o Thermal Resistance 102 °C/W Storage Temperature -65 to +150 °C t A Operating Temperature -40 to +90 °C u n e Outline Drawing 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] HMC624LP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H624 XXXX HMC624LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [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: 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Pin Descriptions Pin Number Function Description Interface Schematic t M 1 P/S s 2 CLK - s 3 SERIN r See truth table, control voltage o table and timing diagram. t A 4 LE u n e t These pins and package bottom 5, 14 GND t must be connected to RF/DC ground. A These pins are DC coupled and matched to 50 Ohms. ATTIN, 6, 13 Blocking capacitors are required. Select value based ATTOUT on lowest frequency of operation. External capacitors to ground is required. Select value for 7 - 12 ACG1 - ACG6 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 See truth table, control voltage table and timing diagram. 19 - 24 D5, D4, D3, D2, D1, D0 18 Vdd Supply voltage 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

HMC624LP4 / 624LP4E v12.0812 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Application Circuit t M s - 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 8 Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC624LP4 / 624LP4E v10.1011 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz Evaluation PCB t M s - s r o t A u n e t t A List of Materials for Evaluation PCB 117212 [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 con- J8, J11 DC Pin nected directly to the ground plane similar to that C1, C6 330 pF Capacitor, 0402 Pkg. shown. A sufficient number of via holes should be C7, C8 1000 pF Capacitor, 0402 Pkg. used to connect the top and bottom ground planes. R1 - R14 100 kOhm Resistor, 0402 Pkg. The evaluation circuit board shown is available from SW1, SW2 SPDT 4 Position DIP Switch Hittite upon request. U1 HMC624LP4(E) Digital Attenuator PCB [2] 117210 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Arlon 25FR For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 9 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