HMC759LP3E v00.0909 Attenuators - DIGITAL - SMT 8 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Typical Applications Features The HMC759LP3E is ideal for: 0.25 dB LSB Steps to 31.75 dB • Cellular/3G Infrastructure Power-Up State Selection • WiBro / WiMAX / 4G High Input IP3: +40 dBm • Microwave Radio & VSAT TTL/CMOS Compatible, Serial Control • Test Equipment and Sensors Excellent State & Step Accuracy ±0.25 dB • IF & RF Applications Single +5V Supply 16 Lead 3x3mm SMT Package: 9mm2 Functional Diagram General Description The HMC759LP3E is a 7-bit BiCMOS 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 control interface is CMOS/TTL compatible and accepts a three wire serial input. The HMC759LP3E features user selectable power up states and a serial output port for cascading other Hittite serial controlled components. The HMC759LP3E is housed in a RoHS compliant 3x3 mm QFN leadless package, and occupies only 9 mm2. Electrical Specifications TA = +25 °C, 50Ω System, with Vdd1 = Vdd2 = +5V & Vctl = 0/+5V Parameter 8-1 Frequency (MHz) Min. Typ. Max. Units 4.5 dB Insertion Loss 10 - 300 3.3 Attenuation Range 10 - 300 31.75 dB Return Loss (RF1, RF2, All Atten. States) 10 - 300 10 dB Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States 10 - 300 ± (0.05 + 1.5% of Atten. Settling) Max. dB Input Power for 1 dB Compression 10 - 50 50 - 300 20 21 dBm dBm Input Third Order Intercept Point (Two-Tone Input Power = 0 dBm Each Tone) 10 - 50 50 - 300 39 >40 dBm dBm Bias Current (Idd1 + Idd2) 10 - 300 Switching Time (50% LE to 90% RF) 10 - 300 300 650 15 1000 µA ns 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] HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Insertion Loss vs. Temperature (Only Major States are Shown) +25C +85C -40C -1 -2 -3 -4 -5 8 dB -20 -25 0.1 0.15 0.2 0.25 0.3 0.35 31.75 dB -30 -35 0.05 16 dB -15 -5 0 4 dB -10 0.4 0 0.05 0.1 FREQUENCY (GHz) 0.15 0.2 0.25 0.3 0.35 0.4 FREQUENCY (GHz) Input Return Loss [1] Output Return Loss [1] (Only Major States are Shown) (Only Major States are Shown) -5 -5 -15 RETURN LOSS (dB) RETURN LOSS (dB) -10 4 dB 8 dB -20 -25 16 dB -10 0 dB Attenuators - DIGITAL - SMT 0 NORMALIZED ATTENUATION (dB) 0 INSERTION LOSS (dB) 8 Normalized Attenuation [1] [1] -15 -30 31.75 dB -35 0 0.05 0.1 0.15 0.2 0.25 31.75 dB 0.3 0.35 -20 0.4 0 0.05 0.1 FREQUENCY (GHz) 0.25 0.3 0.35 0.4 0.3 0.35 0.4 Bit Error vs. Frequency [2] (Only Major States are Shown) [2] 0.5 0.5 0.25 0.25 BIT ERROR (dB) BIT ERROR (dB) 0.2 FREQUENCY (GHz) Bit Error vs. Attenuation State 300 MHz 0.15 200 MHz 0 -0.25 31.75 dB 0 -0.25 10 MHz -0.5 -0.5 0 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) 0 0.05 0.1 0.15 0.2 0.25 FREQUENCY (GHz) [1] Data taken with broadband DC blocking on RF input and output ports. [2] C1, C2 = 10nF 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 HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Worst Case Step Error Between Successive Attenuation States [1] IP3 vs. Attenuation States [1] (Only Major States are Shown) 0.2 60 0.15 55 0.1 16 dB 50 0.05 IP3 (dBm) STEP ERROR (dB) 0 -0.05 8 dB 31.75 dB 45 40 0 dB 35 -0.1 30 -0.15 31.75 dB -0.2 0 0.05 0.1 25 0.15 0.2 0.25 0.3 0.35 0.4 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 FREQUENCY (GHz) FREQUENCY (GHz) Input P1dB vs. Attenuation States [1][2] (Only Major States are Shown) 24 8 dB 4 dB 22 P1dB (dBm) Attenuators - DIGITAL - SMT 8 20 16 dB 18 16 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 FREQUENCY (GHz) Serial Control Interface The HMC759LP3E contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). The 7-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, 7-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. [1] C1, C2 = 10nF [2] Part does not enter 1 dB compression at 31.75 dB max attenuation up to 25 dBm input power. 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] HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Vdd (V) Idd (Typ.) (µA) Parameter Typ. 4.5 580 Min. serial period, tSCK 100 ns 5.0 650 Control set-up time, tCS 20 ns 5.5 710 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 Control Voltage Table State Vdd = +5V Low 0 to 0.8V @ <1 µA High 2 to 5V @ <1 µA 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 kept high at power up, power up state will be indeterminate therefore is not recommended. LE PUP1 PUP2 Relative Attenuation 0 0 0 -31.75 0 1 0 -24 0 0 1 -16 0 1 1 Insertion Loss 1 X X Indeterminate Power-On Sequence Attenuators - DIGITAL - SMT 8 Bias Voltage 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 Truth Table Control Voltage Input Reference Insertion Loss (dB) D6 D5 D4 D3 D2 D1 D0 High High High High High High High 0 High High High High High High Low 0.25 High High High High High Low High 0.5 High High High High Low High High 1 High High High Low High High High 2 High High Low High High High High 4 High Low High High High High High 8 Low High High High High High High 16 Low Low Low Low Low Low Low 31.75 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 HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Attenuators - DIGITAL - SMT 8 Absolute Maximum Ratings RF Input Power (RF1, RF2) 20 dBm (T = +85 °C) Digital Inputs (SERIN LE, CLK, PUP1, PUP2) -0.5 to Vdd +0.5V Bias Voltage (Vdd) 5.6V Channel Temperature 125 °C Continuous Pdiss (T = 85 °C) (derate 9.8 mW/°C above 85 °C) 0.29 W Thermal Resistance (channel to ground paddle) 138 °C/W Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C ESD Sensitivity (HBM) Class 1A 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 HMC759LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL Rating MSL1 [2] Package Marking [1] 759 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] HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Pin Number Function Description 1 Vdd1 This pin should be pulled high to Vdd through a 39 kΩ resistor. 2 SERIN 3 LE 4 CLK 5 PUP1 6 PUP2 7 SEROUT Serial input data delayed by 7 clock cycles. 8, 13 RF1, RF2 This pin is DC coupled and matched to 50 Ohms. Blocking capacitors are required. 9 - 12 ACG0 - 3 External capacitors to ground are required. Place these capacitors close to the package. 14 GND This pin and package bottom must be connected to RF/DC ground. 15 Vdd2 Supply voltage. 16 N/C This pin is not connected internally; however, all data shown herein was measured with this pin connected to RF/DC ground externally. Interface Schematic See Truth Table, Control Voltage Table and Timing Diagram. 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] Attenuators - DIGITAL - SMT 8 Pin Descriptions 8-6 HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz Application Circuit Attenuators - DIGITAL - SMT 8 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] HMC759LP3E v00.0909 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz 8 Attenuators - DIGITAL - SMT Evaluation PCB List of Materials for Evaluation PCB 125228 [1] Item Description J1, J2 PCB Mount SMA Connector J3 18 Pin DC Connector J4, J5 DC Pin C1 - C6 10 nF Capacitor, 0402 Pkg. C7, C8 100 pF Capacitor, 0402 Pkg. C9 1 nF Capacitor, 0402 Pkg. C10 4.7 µF Capacitor, 0805 Pkg. R1 - R4 39K Ohm Resistor, 0402 Pkg. U1 HMC759LP3E Digital Attenuator PCB [2] 125226 Evaluation PCB 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. [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Arlon 25FR or 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