HMC624LFLP4E v00.0511 Attenuators - DIGITAL - SMT 8 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz Typical Applications Features The HMC624LFLP4E is ideal for: 0.5 dB LSB Steps to 31.5 dB • Cellular/3G Infrastructure Power-Up State Selection • Repeaters & Access Points High Input IP3: +55 dBm • WiBro / WiMAX / 4G Low Insertion Loss: 1.2 dB • Microwave Radio & VSAT TTL/CMOS Compatible, Serial, Parallel or Latched Parallel Control • Test Equipment and Sensors <0.1 dB Typical Step Error @ 300 MHz • IF Applications Single +3V or +5V Supply 24 Lead 4x4mm SMT Package: 16mm2 Functional Diagram General Description The HMC624LFLP4E is a 6-bit GaAs IC Digital Attenuator in a low cost leadless SMT package. This versatile digital attenuator is suitable for a wide variety of 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 HMC624LFLP4E also features a user selectable power up state and a serial output port for cascading other Hittite serial controlled components. The HMC624LFLP4E is housed in a RoHS compliant 4x4 mm QFN leadless package, and requires no external matching components. Electrical Specifications, TA = +25° C, 50 Ohm System, with Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted) Parameter Frequency (MHz) Typ. Max. Units 60 - 500 MHz 1.2 1.8 dB Attenuation Range 60 - 500 MHz 31.5 dB Return Loss (ATTIN, ATTOUT, All Atten. States) 60 - 500 MHz 20 dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States 60 - 300 MHz 300 - 400 MHz 400 - 500 MHz Input Power for 0.1 dB Compression 60 - 100 MHz 100 - 500 MHz 30 32 dBm Input Third Order Intercept Point (Two-Tone Input Power = 10 dBm Each Tone) 60 - 100 MHz 100 - 500 MHz 50 55 dBm 60 - 500 MHz 30 60 ns ns Insertion Loss Switching Speed 8-1 tRise, tFall (10 / 90% RF) rON, tOFF (50% LE to 10 / 90% RF) Min. ± (0.20 + 1% of Atten. Setting) Max ± (0.20 + 2% of Atten. Setting) Max ± (0.20 + 2.5% of Atten. Setting) Max dB dB dB 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] HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz (Only Major States are Shown) NORMALIZED ATTENUATION (dB) INSERTION LOSS (dB) +25 C +85 C -40 C -0.5 -1 -1.5 -2 -5 -10 -15 -20 -25 -30 -35 50 150 250 350 450 550 50 150 FREQUENCY (MHz) 250 350 450 550 450 550 FREQUENCY (MHz) Input Return Loss Output Return Loss (Only Major States are Shown) (Only Major States are Shown) 0 -10 -10 RETURN LOSS (dB) 0 -20 -30 -40 -20 -30 Attenuators - DIGITAL - SMT 0 0 RETURN LOSS (dB) 8 Normalized Attenuation Insertion Loss vs. Temperature -40 -50 -50 50 150 250 350 450 550 50 150 FREQUENCY (MHz) 250 350 FREQUENCY (MHz) Bit Error vs. Frequency Bit Error vs. Attenuation State (Only Major States are Shown) 1 1 0.8 31.5 dB 0.5 0.4 BIT ERROR (dB) BIT ERROR (dB) 0.6 0.2 0 -0.2 -0.4 60 MHz 100 MHz 200 MHz -0.6 300 MHz 400 MHz 500 MHz 16 dB 0 -0.5 -0.8 -1 -1 0 4 8 12 16 20 24 ATTENUATION STATE (dB) 28 32 50 150 250 350 450 550 FREQUENCY (MHz) 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 HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz Step Attn vs. Attn State, 60 - 300 MHz Step Attn vs. Attn State, 400-500 MHz 0.8 60 MHz 100 MHz 200 MHz 300 MHz 0.7 STEP ATTENUATION (dB) STEP ATTENUATION (dB) 0.8 0.6 0.5 0.4 0.3 0.2 0.7 400 MHz 500 MHz 0.6 0.5 0.4 0.3 0.2 0 4 8 12 16 20 24 28 32 0 4 8 ATTENUATION STATE (dB) 12 16 20 24 28 32 ATTENUATION STATE (dB) P0.1dB vs. Temperature IP3 @ Major Attenuation States 70 40 60 35 P0.1dB (dBm) IP3 (dBm) Attenuators - DIGITAL - SMT 8 50 40 30 +25 C +85 C -40 C 25 30 20 50 150 250 350 450 550 50 150 FREQUENCY (MHz) 250 350 450 550 FREQUENCY (MHz) Serial Control Interface The HMC624LFLP4E 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. 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] HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz Parallel Mode (Direct Parallel Mode & Latched Parallel Mode) Parameter Typ. Min. serial period, tSCK 100 ns Control set-up time, tCS 20 ns Control hold-time, tCH 20 ns LE setup-time, tLN 10 ns Min. LE pulse width, tLEW 10 ns Min LE pulse spacing, tLES 630 ns Serial clock hold-time from LE, tCKN 10 ns Hold Time, tPH. 0 ns Latch Enable Minimum Width, tLEN 10 ns Setup Time, tPS 2 ns Note: The parallel mode is enabled when P/S is set to low. Direct Parallel Mode - The attenuation state is changed by the control voltage inputs D0-D5 directly. The LE (Latch 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 PUP1 and PUP2 determines the power-up state of the part per PUP truth table. If the LE is set to logic HIGH at power-up, the logic state of D0-D5 determines the power-up state of the part per truth table. The attenuator latches in the desired power-up state approximately 200 ms after power-up. Power-On Sequence The ideal power-up sequence is: GND, Vdd, digital inputs, RF inputs. The relative order of the digital inputs are not important as long as they are powered after Vdd / GND Bias Voltage Table LE PUP1 PUP2 Relative Attenuation 0 0 0 -31.5 0 1 0 -24 0 0 1 -16 0 1 1 Insertion Loss 1 X X 0 to -31.5 dB Note: The logic state of D0 - D5 determines the powerup state per truth table shown below when LE is high at power-up. Truth Table Control Voltage Input D5 D4 D3 D2 D1 D0 Reference Insertion Loss High High High High High High 0 dB Vdd (V) Idd (Typ.) (mA) High High High High High Low -0.5 dB 3 0.12 High High High High Low High -1 dB 5 0.15 High High High Low High High -2 dB High High Low High High High -4 dB Control Voltage Table State Vdd = +3V Vdd = +5V Low 0 to 0.5V @ <1 µA 0 to 0.8V @ <1 µA High 2 to 3V @ <1 µA 2 to 5V @ <1 µA Attenuators - DIGITAL - SMT 8 Timing Diagram (Latched Parallel Mode) 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 equal to the sum of the bits selected. 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 HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz Attenuators - DIGITAL - SMT 8 Absolute Maximum Ratings RF Input Power (60-500 MHz) 28 dBm (T = +85 °C) Digital Inputs (P/S, CLK, SERIN, LE, PUP1, PUP2, D0-D5) -0.5 to Vdd +0.5V Bias Voltage (Vdd) 5.6V Channel Temperature 150 °C Continuous Pdiss (T = 85 °C) (derate 9.8 mW/°C above 85 °C) 0.635 W Thermal Resistance 102 °C/W Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C ESD Sensitivity (HBM) Class 1B ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing 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 HMC624LFLP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL Rating MSL1 [2] Package Marking [1] H624LF XXXX [1] 4-Digit lot number XXXX [2] Max peak reflow temperature of 260 °C 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] HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz Pin Number Function 1 P/S 2 CLK Description Interface Schematic See truth table, control voltage table and timing diagram. 3 SERIN 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 are required. Select values for lowest frequency of operation. Place capacitors 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 Attenuators - DIGITAL - SMT 8 Pin Descriptions See truth table, control voltage table and timing diagram. Supply voltage 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 HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz Application Circuit Attenuators - DIGITAL - SMT 8 Normalized Attenuation Wideband Performance P0.1dB vs. Temperature Wideband Performance 40 -5 -15 -20 -25 20 10 -30 -35 0.1 1 10 100 1000 FREQUENCY (MHz) Note: The capacitor value for C1-C6 shown in the standard Application Circuit as 0.1 uF will result in excellent wideband small signal performance from 200 kHz to 500 MHz. Small signal operation to frequencies lower than 200 kHz is possible through the proper selection of capacitors C1-C6. Contact Hittite Applications Group for proper selection of C1-C6 values for frequencies lower than 200 kHz. 8-7 +25 C +85 C -40 C 30 -10 P0.1dB (dBm) NORMALIZED ATTENUATION (dB) 0 0 0.1 1 10 100 1000 FREQUENCY (MHz) Note: The 0.1 dB Input Compression Point degrades for low frequency operation. Typical 0.1 dB Input Compression Point at 60 MHz is +27 dBm tapering to +5 dBm at 250 kHz. The typical 0.1 dB Compression Point holds constant at +5 dBm for frequencies lower than 250 kHz. Hittite recommends that Absolute Maximum Input Power Levels be maintained to less than the 0.1 dB Compression point for reliable operation of the HMC624LFLP4E. 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] HMC624LFLP4E v00.0511 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, 60 - 500 MHz 8 Attenuators - DIGITAL - SMT Evaluation PCB List of Materials for Evaluation PCB EVAL01-HMC624LFLP4E [1] Item Description J1, J2 PCB Mount SMA Connector J3 18 Pin DC Connector J8, J11 DC Pin C1 - C6 0.1 uF Capacitor, 0402 Pkg. C7 - C8 1000 pF Capacitor, 0402 Pkg. R1 - R14 100 kOhm Resistor, 0402 Pkg. SW1, SW2 SPDT 4 Position DIP Switch U1 HMC624LFLP4E Digital Attenuator PCB [2] 117210 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 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. [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, 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