HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz Typical Applications Features The HMC681LP5(E) is ideal for: +13.5 dB to +45 dB Gain Control in 0.5 dB Steps • IF & RF Applications High Output IP3: +36 dBm • Cellular/3G Infrastructure ±0.25 dB Typical Gain Step Error • WiBro / WiMAX / 4G Single +5V Supply • Microwave Radio & VSAT 32 Lead 5x5mm SMT Package: 25mm2 • Test Equipment and Sensors Functional Diagram General Description The HMC681LP5(E) is a digitally controlled variable gain amplifier which operates from DC to 1 GHz, and can be programmed to provide anywhere from 13.5 dB, to 45 dB of gain, in 0.5 dB steps. The HMC681LP5(E) delivers noise figure of 2.8 dB in its maximum gain state, with output IP3 of up to +36 dBm in any state. This serially controlled digital VGA incorporates off chip AC ground capacitors for near DC operation, making it suitable for a wide variety of RF and IF applications. The HMC681LP5(E) is housed in a RoHS compliant 5x5 mm QFN leadless package, and provides the user with a highly integrated solution. This functionality is also available with parallel control as the HMC626LP5(E). Variable gain amplifiers - digital - SMT 12 12 - 1 Electrical Specifications, TA = +25° C, Vdd = Vs= P/S= +5V Parameter Gain (Maximum Gain State) Min. Typ. Max. Min. 50 - 350 Max. 30 MHz dB 31.5 31.5 dB Input Return Loss 25 30 dB Output Return Loss 20 17 dB Gain Setting Accuracy: (Referenced to Maximum Gain State) All Gain States 45 Units 40 Gain Control Range 40 Typ. 350 - 1000 ± (0.15 + 3% of Relative Gain Setting) Max. ± (0.15 + 3% of Relative Gain Setting) Max. dB Output Power for 1 dB Compression 20 19 dBm Output Third Order Intercept Point (Two-Tone Output Power= 5 dBm Each Tone) 38 36 dBm Noise Figure 2.7 2.8 dB Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) 60 120 60 120 ns ns Total Supply Current 176 225 176 225 mA 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] HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz 50 to 350 MHz Tuning Relative Gain Setting (Referenced to Maximum Gain State) (Only Major States are Shown) Gain vs. Frequency 0 50 45 -5 RELATIVE GAIN (dB) 40 30 +25C +85C -40C 25 20 15 10 16 dB -15 -20 -25 31.5 dB -30 5 0 0.05 -10 0.1 0.15 0.2 0.25 0.3 -35 0.05 0.35 0.1 0.15 FREQUENCY (GHz) Input Return Loss 0 -5 RETURN LOSS (dB) RETURN LOSS (dB) 0 31.5dB -15 -20 -25 -30 -40 0.05 0.15 0.2 0.25 0.3 0.35 -15 -20 -25 -30 I.L -40 0.05 0.35 0.1 0.15 0.2 0.25 FREQUENCY (GHz) Bit Error vs. Frequency Bit Error vs. Relative Gain Setting (Only Major States are Shown) 2 2 1.5 1.5 1 1 0.5dB BIT ERROR (dB) BIT ERROR (dB) 0.3 31.5dB FREQUENCY (GHz) 0.5 0 -0.5 16dB -1 0.5 350MHz 0 -0.5 -1 -1.5 -1.5 31.5dB -2 0.05 0.35 -10 -35 2dB 0.1 0.3 (Only Major States are Shown) -5 -35 0.25 Output Return Loss (Only Major States are Shown) -10 0.2 FREQUENCY (GHz) 150, 200MHz -2 0.1 0.15 0.2 0.25 FREQUENCY (GHz) 0.3 0.35 0 4 8 12 16 20 24 28 32 RELATIVE GAIN SETITING (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] 12 variable gain amplifiers - digital - SMT GAIN (dB) 35 8 dB 12 - 2 HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz 50 to 350 MHz Tuning Relative Phase vs. Frequency Step Error vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 60 1 31.5 dB 20 0 0.5 - 16 dB 16 dB -20 -40 0.05 0.1 16 dB 0.4 0.2 0 -0.2 -0.4 1 dB -0.6 -0.8 0.15 0.2 0.25 0.3 -1 0.05 0.35 0.1 0.15 0.2 0.25 0.3 0.35 FREQUENCY (GHz) FREQUENCY (GHz) Output P1dB Output IP3 @ 5 dBm Output Power per Tone (Major States shown are IL through 16 dB) (Major States shown are IL through 16 dB)) 45 24 I.L. 43 22 I.L. IP3 (dBm) P1dB (dBm) Variable gain amplifiers - digital - SMT 0.6 8 dB 31.5 dB 12 12 - 3 40 STEP ERROR (dB) RELATIVE PHASE (deg) 0.8 20 16 dB 18 41 39 37 16 dB 16 0.05 0.1 0.15 0.2 0.25 FREQUENCY (GHz) 0.3 0.35 35 0.05 0.1 0.15 0.2 0.25 0.3 0.35 FREQUENCY (GHz) 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] HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz 350 to 1000 MHz Tuning Relative Gain Setting (Referenced to Maximum Gain State) (Only Major States are Shown) Gain vs. Frequency 0 50 45 -5 RELATIVE GAIN (dB) 40 30 25 +25 C +85 C -40 C 20 15 -10 16 dB -15 -20 -25 31.5 dB 10 -30 5 0 0.2 0.4 0.6 0.8 -35 0.2 1 0.4 FREQUENCY (GHz) 0.6 0.8 1 0.8 1 FREQUENCY (GHz) Input Return Loss Output Return Loss (Only Major States are Shown) (Only Major States are Shown) 0 0 -5 31.5 dB RETURN LOSS (dB) RETURN LOSS (dB) -10 31.5 dB -20 -30 -40 0.4 0.6 -15 -20 -25 I.L -30 -35 I.L -50 0.2 -10 0.8 -40 0.2 1 0.4 Bit Error vs. Frequency Bit Error vs. Relative Gain Setting (Only Major States are Shown) 2 2 1.5 1.5 1 BIT ERROR (dB) 1 BIT ERROR (dB) 0.6 FREQUENCY (GHz) FREQUENCY (GHz) 0.5 0 -0.5 8 dB -1 1000 MHz 0 -0.5 -1 16 dB -1.5 0.5 -1.5 350 MHz 31.5 dB -2 -2 0.2 0.4 0.6 FREQUENCY (GHz) 0.8 1 0 4 8 12 16 20 24 28 32 RELATIVE GAIN SETTING (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] 12 variable gain amplifiers - digital - SMT GAIN (dB) 35 8 dB 12 - 4 HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz 350 to 1000 MHz Tuning Relative Phase vs. Frequency Step Error vs. Frequency (Only Major States are Shown) (Only Major States are Shown) 60 1 0.8 20 0 0.5 - 4 dB 16 dB 0.4 32 dB 0.2 0 -0.2 -0.4 4, 8 dB -0.6 -20 -40 0.2 0.4 0.6 0.8 -1 0.2 1 0.4 0.6 0.8 1 FREQUENCY (GHz) FREQUENCY (GHz) Output P1dB Output IP3 @ 5 dBm Output Power per Tone (Major States shown are IL through 16 dB) (Major States shown are IL through 16 dB) 24 50 I.L. 22 40 I.L. IP3 (dBm) P1dB (dBm) Variable gain amplifiers - digital - SMT 8 dB -0.8 12 12 - 5 0.6 16 dB STEP ERROR (dB) RELATIVE PHASE (deg) 31.5 dB 40 20 18 30 16 dB 20 16 dB 16 0.2 0.4 0.6 0.8 1 10 0.2 0.4 FREQUENCY (GHz) 0.6 0.8 1 FREQUENCY (GHz) Power-Up States 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. The attenuator latches in the desired power-up state approximately 200 ms after power-up. Power-On Sequence PUP Truth Table LE PUP1 PUP2 Relative Gain Setting 0 0 0 -31.5 0 1 0 -24 0 0 1 -16 0 1 1 Insertion Loss 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 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] HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz Serial Control Interface The HMC681LP5(E) contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). It 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 were 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. For all modes of operations, gain will remain constant while LE is kept low. Truth Table 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 Serial Word Relative Gain Setting B5 16 dB B4 8dB B3 4 dB B2 2 dB B1 1 dB B0 0.5 dB High High High High High High Reference 0 dB -0.5 dB High High High High High Low 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 a relative gain setting approximately 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] variable gain amplifiers - digital - SMT 12 12 - 6 HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz Bias Voltage Absolute Maximum Ratings RF Input Power [1] (At Max Gain Setting) -10.5 dBm (T = +85 °C) Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) -0.5 to Vdd +0.5V Bias Voltage (Vdd) 5.5V Variable gain amplifiers - digital - SMT 5 Vs (V) Is1 (mA) Is2 (mA) +5 88 88 Control Voltage Table Collector Bias Voltage (Vcc) 5.5V 150 °C Continuous Pdiss (T = 85 °C) (derate 19.8 mW/°C above 85 °C) [1] State Vdd = +3V Vdd = +5V 1.29 W Low 0 to 0.5V @ <1 µA 0 to 0.8V @ <1 µA 50.8 °C/W High 2 to 3V @ <1 µA 2 to 5V @ <1 µA Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C [1] The Max RF Input Power Rating will increase by 0.5 dB for every 0.5 dB reduction in gain to a maximum RF Input Power of 10 dBm. 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 Package Information LAND PATTERN. Part Number Package Body Material Lead Finish HMC681LP5 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] HMC681LP5E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] [1] Max peak reflow temperature of 235 °C 12 - 7 Idd (Typ.) (mA) +5 Channel/Junction Temperature Thermal Resistance 12 Vdd (V) [2] Max peak reflow temperature of 260 °C MSL Rating Package Marking [3] H681 XXXX H681 XXXX [3] 4-Digit lot number XXXX 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] HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz Pin Descriptions Function Description 1, 5, 9, 14, 16, 23, 28 N/C The pins are not connected internally; however, all data shown herein was measured with these pins connected to RF/DC ground externally. 2, 20 RFin1,RFin2 This pin is DC coupled. An off chip DC blocking capacitor is required. 4, 22 RFout1, RFout2 RF output and DC bias (Vcc) for the output stage of the amplifiers. Amplifier bias provided via external bias tee as shown in application circuit. 3, 7, 18, 21 GND These pins and package bottom must be connected to RF/DC ground. 6, 19 ATTin, ATTout These pins are DC coupled and matched to 50 Ohms. Blocking capacitors are required. Select value based on lowest frequency of operation. 8, 10, 11, 12, 13, 15, 17 ACG1, ACG2, ACG3, ACG4, ACG5, ACG6, ACG7 External capacitors to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. 24 SEROUT Serial input data delayed by 6 clock cycles. 25, 26 PUP2, PUP1 30 CLK 31 SERIN 32 LE 29 P/S Apply +5V for normal operation. 27 Vdd Supply voltage Interface Schematic Refer to truth tables and serial control interface 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] 12 variable gain amplifiers - digital - SMT Pin Number 12 - 8 HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz Application Circuit Variable gain amplifiers - digital - SMT 12 12 - 9 Components for Selected Frequencies 50 - 350 MHz 350 - 1000 MHz Evaluation PCB Tuned Frequency 119171 123115 C1, C2, C9, C10 3300 pF 100 pF C6 - C8 330 pF 100 pF L1, L2 560 nH 270 nH 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] HMC681LP5 / 681LP5E v03.1010 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz Evaluation PCB List of Materials for Evaluation PCB [1] Item Description J1 - J2 PCB Mount SMA Connector J3 18 Pin DC Connector J4 - J7, J9 DC Pin C1, C2, C9, C10 Capacitor, 0402 Pkg. [1] C3 - C5 100 pF Capacitor, 0402 Pkg. C6 - C8 Capacitor, 0402 Pkg. [1] C11 - C13 1000 pF Capacitor, 0402 Pkg. C14, C15 2.2 µF Capacitor, CASE A Pkg. R1, R2 1.8 Ohm Resistor, 0603 Pkg. L1, L2 Inductor, 0603 Pkg. [1] U1 HMC681LP5(E) Variable Gain Amplifier PCB [2] 119169 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. Refer to “Components for Selected Frequencies” table for part number. [1] Please reference “Components for Selected Frequencies” table. variable gain amplifiers - digital - SMT 12 [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] 12 - 10