Analog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED www.analog.com www.hittite.com THIS PAGE INTENTIONALLY LEFT BLANK HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Typical Applications Features The HMC976LP3E is ideal for: High Output Current: 400mA * Test Instrumentation Low Dropout: 300mV at 400mA Output and VR>3V * Military Radios, Radar and ECM Ultra Low Noise: 3nV/Hz at 10 kHz, 6nV/Hz at 1 kHz * Basestation Infrastructure High Power Supply Rejection Ratio (PSRR): <-60 dB at 1 kHz, <-30 dB at 1 MHz * Ultra Low Noise Frequency Generation * Fractional-N Synthesizer Supply Adjustable Voltage Output: VR 1.8 to 5V at 400mA * Microwave VCO Supply Designed to work with low ESR ceramic capacitors * Mixed-Signal Circuit Supply Low Power-Down Current: <1 A * Low Noise Baseband Circuit Supply Thermal Protection 16 Lead 3x3 mm SMT Package: 9mm POWER CONDITIONING - SMT Functional Diagram General Description The HMC976LP3E is a BiCMOS ultra low noise linear voltage regulator. The high Power Supply Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz range provides excellent rejection of any preceding switching regulator or other power supply noise. The voltage output is ideal for frequency generation subsystems including Hittite's broad line of PLLs with integrated VCOs. The output voltage can be adjusted lower than the default value by using one external resistor. The output can be set to 5V by grounding the HV pin. The regulator can be powered down by the TTL-compatible Enable input. The HMC976LP3E is housed in a 3x3mm QFN SMT package. Table 1. Electrical Specifications, TA = +25 C Parameter Conditions Min Typ Max Units Vdd = 5.5V; Maximum load current 4.7 4.8 4.9 V Output Voltage VR (5V setting) Vdd = 5.5V; Maximum load current 4.9 5 5.1 V Output Voltage Tolerance Vdd = 5.5V; Maximum load current; Default and 5V setting 2 % Input Voltage Range (Default) Default output voltage configuration 5.1 5.5 V For VR>3V[1] VDD>VR+0.3V 3.3 5.5 V Set by external resistors. 1.8 5.1 V Output Voltage VR (Default) Input Voltage Range Output Voltage Range VR [1] See Absolute Maximum Ratings Table "Absolute Maximum Ratings" 1 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Table 1. Electrical Specifications (Continued) Reference Voltage VREF Output Current VR [1] Output Noise Spectral Density 10 Hz 100 Hz 1 kHz 10 kHz 100 kHz Integrated Output Noise 100 Hz to 100 kHz Conditions Vdd = 5.5V; REF cannot source/sink external current Power Down Current Start-Up Transient Time Enable Input EN High Level Enable Input EN Low Level 4000 120 6 3 3 Vdd = 5.5V; VR = 5.0V [3] Vdd = 5.5V; VR=5.0V Maximum load current Units V 400 Measured on Application Schematic [3] Maximum Load Current PSRR 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz 50 MHz Max 1.17 Vdd = 5.5V; VR = 5.0V Vdd = 5.5V; VR=5.0V Current Consumption (IGND) Typ TA = -40C to +85C Load Regulation, VR Output Voltage Variation vs. Package Base Temperature 25C to 85C -40C to 25C Min mA nV/rtHz 1.5 Vrms 0.01 % / mA -70 -65 -45 -35 -30 -20 Vdd = 5.5V; VR=5.0V Maximum load current Ven = Vdd = 5.5V; Maximum Load Current dB 0.005 0.005 0.01 0.01 % / C % / C 1.1 1.5 mA 1 A 200 ms Vdd = 5.5V; EN = Low; Output is floating (high - impedance) in Power-Down mode 0 to 90% of final voltage Vdd = 5.5V[3] Vdd>=VEN 2 Vdd V Vdd>=VEN 0 0.8 V To guarantee stability, noise and PSRR Output Load Capacitance [2] Thermal Protection Threshold Junction Temperature [4] Thermal Protection Hysteresis performance [3] 4.7 Junction Temperature Rising 115 F 130 C 10 C POWER CONDITIONING - SMT Parameter [1] The regulator does not include short-circuit protection circuitry. The outputs will withstand short-circuit conditions for a duration <10s. The thermal protection is not intended to be used as a short circuit protection [2] HMC976LP3E was designed to work with low ESR ceramic capacitors connected to pin 4 VRX. [3] See HMC976LP3E 5.0V User Application Schematic herein [4] See figures 14,15, and 16 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com 2 HMC976LP3E 10 -5 10 -6 10 -7 10 -8 10 -9 10 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Figure 1. Vout=5V Output Noise Spectral Density [1] C3=1uF C2=10uF NOISE VOLTAGE (V/rtHz) NOISE VOLTAGE (V/rtHz) v02.1112 C3=1uF C2=1uF C3=4.7uF C2 =4.7uF 1 10 -5 10 -6 10 -7 10 -8 10 -9 C3=4.7uF C2=4.7uF C3=4.7uF C2=10uF -10 10 10 Figure 2. Vout=3.3V Output Noise Spectral Density [2] 2 10 3 10 4 10 5 10 6 10 7 10 10 8 -10 10 1 10 2 10 3 10 FREQUENCY (Hz) -20 4 10 Figure 3. Vout 4.8V PSRR vs. Vin-Vout [3] -20 PSRR (dB) PSRR (dB) 10 7 10 8 -40 -50 VIN-VOUT=0.6V -50 VIN-VOUT=0.8V -60 VIN-VOUT=1.0V -60 -70 VIN-VOUT=1.7V VIN-VOUT=0.8V -70 -80 -80 2 10 10 3 10 4 10 5 10 6 10 7 10 -90 2 10 8 10 3 10 FREQUENCY (Hz) 4 10 5 10 6 10 7 10 8 FREQUENCY (Hz) Figure 6. Vout=5V and Vref vs. Temperature [1,4] Figure 5. Vout=5V and Vref vs. Temperature [1,4] 4.975 1.175 0.6 5.00 25C 4.90 1.170 0.5 85C VOUT (V) 4.965 1.165 VR 4.960 1.160 1.155 4.955 4.950 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 1.150 VOUT (V) -40 4.80 0.4 4.70 0.3 4.60 0.2 4.50 0.1 4.40 4 4.2 4.4 TEMPERATURE (C) [1] [2] [3] [4] 4.6 4.8 5 5.2 5.4 5.6 0 INPUT VOLTAGE (V) VDD=5.5V,400mA Load see "HMC976LP3E 5V User Application Schematic" VDD=5.0V,400mA Load see "HMC976LP3E 3.3V User Application Schematic" VDD=5.5V,400mA Load see "HMC976LP3E 4.8V User Application Schematic". Temperature is the ambient temperature of the standard HMC976LP3E evaluation board, still air. For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com Dropout Voltage(V) VIN-VOUT (V) VIN-VOUT VREF 4.970 VREF (V) POWER CONDITIONING - SMT 6 VIN-VOUT=0.25V -30 VIN-VOUT=0.4V -40 3 10 Figure 4. Vout=3.3V PSRR vs. Vin-Vout [2] VIN-VOUT=0.5V -30 5 FREQUENCY (Hz) HMC976LP3E v02.1112 Figure 8. Output Load Switched ON to OFF [1] 400 5.04 5.00 300 200 VR Output 4.92 OUTPUT (V) 4.96 100 VR Output 300 4.96 200 4.92 0 0 5 10 15 20 25 30 35 40 100 CURRENT 4.88 -5 45 0 0 5 10 15 20 25 TIME (ms) TIME (ms) ENA 2.50 3.50 3.50 3.00 3.00 3.00 2.50 2.50 2.50 2.00 2.00 1.50 1.50 2.00 VR Output 1.50 1.50 1.00 1.00 1.00 0.500 0.500 0.500 0.00 -50 0 50 100 150 200 250 300 350 400 4.00 ENA VR Output 0.00 0.200 -6 10 -7 10 -8 10 -9 0.00 0.800 0.600 Figure 12. Vout vs. Load current [1] 5.050 Commercial PSU Output Input to regulator 5.030 VOUT (V) NOISE VOLTAGE (V/rtHz) 10 0.400 TIME (s) Figure 11. HMC976LP3E Output Noise Spectral Density vs. Commercial PSU [1] -5 1.00 0.500 0.00 -0.200 0.00 450 3.50 TIME (ms) 10 45 5.010 4.990 4.970 HMC976LP3E Output 10 4.950 -10 10 1 10 2 10 3 4 5 10 10 FREQUENCY (Hz) 10 6 10 7 10 8 0 50 100 150 200 250 300 350 ENA (V) 2.00 40 4.00 ENA (V) OUTPUT (V) 3.00 35 4.00 OUTPUT (V) 3.50 30 Figure 10. Supply Turn-Off Transient [2] Figure 9. Supply Turn-On Transient [2] 4.00 400 5.00 CURRENT 4.88 -5 500 CURRENT (mA) 5.04 CURRENT (mA) 5.08 POWER CONDITIONING - SMT Figure 7. Output Load Switched OFF to ON [1] 500 5.08 OUTPUT (V) 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR 400 LOAD CURRENT mA [1] VDD=5.5V, 400mA Load ""HMC976LP3E 5V User Application Schematic". [2] VDD=5.0V, 400mA Load "HMC976LP3E 3.3V User Application Schematic" For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com 4 HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Table 2. Absolute Maximum Ratings Vdd to GND Voltage +5.8V / -0.3V EN to GND Voltage +5.8V /-0.3V RDx / HVx to GND Voltage +5.8V / -0.3V Maximum Dissipation 780mW Thermal Resistance (Junction to Ambient) 51.5 C/W [3] Thermal Resistance (Junction to Case, Ground Paddle) 18 C/W Maximum Junction Temperature +150 C Max Output Current 420 mA Storage Temperature -65 to +150 C ESD Sensitivity (HBM) Class 1C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. The absolute maximum ratings apply individually only, not in combination. ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Table 3. Recommended Operating Condition Parameter Condition Min. Junction Temperature Ambient Temperature Typ. Max. Units 115 C 85 C -40 POWER CONDITIONING - SMT Outline Drawing NOTES: [1] PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED PLASTIC SILICA AND SILICON IMPREGNATED. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY. LEAD AND GROUND PADDLE PLATING: 100% MATTE TIN. DIMENSIONS ARE IN INCHES [MILLIMETERS]. LEAD SPACING TOLERANCE IS NON-CUMULATIVE. PAD BURR LENGTH SHALL BE 0.15mm MAX. PAD BURR HEIGHT SHALL BE 0.25m MAX. [7] PACKAGE WARP SHALL NOT EXCEED 0.05mm [8] ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB GROUND. [9] REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN. [2] [3] [4] [5] [6] Table 4. Package Information Part Number Package Body Material Lead Finish HMC976LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL Rating MSL1 [2] Package Marking [1] 976 XXX X [1] 4-Digit lot number XXXX [2] Max peak reflow temperature of 260 C [3] For standard HMC976LP3E evaluation board, no heat sink (HS) and no air flow, see figures 14, 15, and 16 5 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Table 5. Pin Descriptions Function Description 1 EN Enable Input, TTL Logic Level. The VR and VRX outputs are floating (high impedance) when EN = Low. 2 RD Resistive feedback for VR, see "Output Voltage Adjust" section. 3 REF Reference voltage (bandgap) output. Cannot be used to source/sink current to/from external circuits 4 VRX For Decoupling Capacitor Cannot be used to source current to external circuits 11 VR Regulator Output VR 400mA 5 HV Sets VR to 5V output when grounded 6 - 10, 12 - 14,16 N/C These pins can be left unconnected or connected to GND with no change in performance 15 VDD Unregulated power supply input 5.5V max Package Base GND Must contact PCB ground Interface Schematic For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com POWER CONDITIONING - SMT Pin Number 6 HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR POWER CONDITIONING - SMT Evaluation PCB 7 Table 6. Ordering Information Item Contents Part Number Evaluation PCB HM976LP3E Evaluation PCB 131671-HMC976LP3E Table 7. List of Materials for Evaluation PCB 131671 Item Contents J1 PCB Mount SMA connector J3 3 Pin Header JP4, JP6, JP7, JP8, 2 Pin Header and Jumper C10, C12, C21 4.7F Capacitor 0603 Pkg. C11 0.1F Capacitor 0402 Pkg. R13 0.2 Ohm Resistor 0402 Pkg. R3 1 Ohm Resistor 0402 Pkg. R8 100 kOhm Resistor 0402 Pkg. TP1, TP3 Test Point PC Compact Red TP2 Test Point PC Compact Black U1 HMC976LP3E 400mA Low Noise, High PSRR Linear Voltage Regulator PCB 131669 Eval Board For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Operational Features The recommended configuration is "HMC976LP3E 4.8V User Application Schematic". This is for the default output voltage of 4.8V nominal. The values shown are those recommended for optimum Noise Spectral density. For users requiring extremely low noise in the 1 MHz to 10 MHz range the largest output capacitor should be used: a 68uF takes the noise between 100 kHz and 1 MHz to below 2.5nV/Hz. Load Capacitor Characteristics The HMC976LP3E was designed to work with a low ESR ceramic load capacitor on the VRX pin (C21 in the schematic above). Low ESR ceramic capacitors are very small and best for eliminating high frequency noise. Ceramic capacitors can vary as much as 50% versus temperature and 60% versus voltage, dependant on the ceramic type e.g. Z5U, Y5V, X7R or X5R. There are no restrictions on ceramic type or minimum ESR, only that the user must guarantee that the minimum output capacitance over operating conditions is 4.7F, smaller values can result in noise peaking or lower stability. For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com POWER CONDITIONING - SMT Figure 13. Evaluation PCB Schematic 8 HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Output Voltage Adjustment The default output voltage is 4.8V this configuration "HMC976LP3E 4.8V User Application Schematic". The output voltage can be set to 5V by a ground on HV pin 5 "HMC976LP3E 5V User Application Schematic". The output voltage can be set from 1.8V to <4.8V by a resistor from pin 2 to the output pin 11 shown in "HMC976LP3E 3.3V User Application Schematic". The value of the resistor is given by the equation below. Vout - 1 *18.9 1 . 17 R1 = Vout 1 - 0.32 * - 1 1.17 (Kohms) If the temperature stability performance similar to that shown in the plot "Vout=5V and Vref vs. Temperature" is required, then any external resistor temperature coefficient is a critical parameter and should be better than 50ppm and 1% tolerance. Please note that the temperature coefficient of the internal resistor feedback divider is 270ppm/C. POWER CONDITIONING - SMT Layout of PCB The layout of the PCB should follow these guide lines, the PADDLE should be connected to ground with at least 5 vias directly under the paddle to the bottom side ground plane. To ensure the noise and PSRR specifications are met, the capacitors connecting to Pins 15, 11, 3 (see user application schematics), should be placed as close as possible to the relevant pin and the ground connection should be as short as possible. Trace widths and via sizes should be scaled to match the current drawn. The use of a large ground plane is recommended with a large number of ground vias near the device to carry the ground. Thermal Protection The HMC976LP3E includes an integrated thermal protection circuit. If the junction temperature of the HMC976LP3E reaches the maximum operating junction temperature (115C max, 130C typical) then the thermal protection circuit temporarily disables the HMC976LP3E outputs (with ~500uA output current) until the junction temperature cools down by approximately 10C. A typical reason for the increase of the junction temperature is an unexpected increase in current draw. By disabling the outputs, the HMC976LP3E is in this case protecting the other devices on the PCB that it is supplying with current. The thermal protection circuitry will also indirectly protect against a short circuit at the output. After the overload or the fault condition is removed or changed, the regulator output returns to the nominal operation For reliable long term operation the "Recommended Operating Condition" must be followed and the maximum junction temperature must not be exceeded. The junction temperature for a given dissipation can be calculated from the equation below: T =Ta + P x j ja d Where Tj=Junction Temperature (C), Ta=Ambient Temperature (C), Pd=Dissipated Power (W) ja =Thermal Resistivity Junction to Ambient (C/W). Please refer to Table 2 for thermal resistance values. 9 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Thermal dissipation should be taken into account at all times especially with large dropout voltages VDD-VR, i.e. if 1.8V output is required from 5.5V input voltage, then the output current must be restricted to <210mA , or VDD restricted to <3.75V for a 400mA load. The exact maximum operating temperature before the thermal protection circuit activates is largely dependent on the customer PCB design. Below is an example for maximum ambient temperature calculation for the standard HMC976LP3E evaluation PCB with no heat sink and no air flow (fans). Customers should perform this calculation for their PCB layout and operating conditions. VIN=5.5V, Vout=5.0V, Iout=400mA Vdropout=VIN-VOUT=0.5V Dissipated power on regulator Pd=0.5Vx0.4A=0.2W ja =51.5C/W Junction temperature increase using standard HMC976 board: DTj=Pd x ja =10.3C. Thermal shutdown junction temperature of regulator (absolute min) Tsdwn=+115C. Maximum corresponding ambient temperature Ta_max = Tsdwn - DTj = +104.7C The plots below show how the PCB ground copper area affects the HMC976LP3E junction temperature for different HMC976LP3E power dissipation conditions. The following cases are included in the plots: 1. 100 mm2 Copper Area 2. 1000 mm2 Copper Area 3. 2580 mm2 Copper Area HMC976LP3E Evaluation PCB No Heat Sink (HS) 5. JEDEC Board as per JESD51-3 The typical corresponding Table 8. Typical ja is shown in Table 8: ja for specified PCB Copper Sizes ja (C/W) Copper size (mm2) 100 173.5 1000 57.3 2580 no HS 51.5 2580 with HS 44 Figure 14. HMC976LP3E JUNCTION TEMPERATURE C vs. TOTAL POWER DISSIPATION 25C AMBIENT Figure 15. HMC976LP3E JUNCTION TEMPERATURE C vs. TOTAL POWER DISSIPATION 50C AMBIENT 150 150 115C WORST CASE THERMAL SHUTDOWN JUNCTION TEMPERATURE Tj (C) JUNCTION TEMPERATURE Tj (C) 115C WORST CASE THERMAL SHUTDOWN 125 Tjmax 2 100mm no HS 100 2 1000mm no HS 75 2 2580mm no HS 2 2580mm with HS 50 25 JEDEC no HS 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 POWER DISSIPATION (W) 0.8 0.9 1 125 Tjmax 2 2 1000mm no HS 100mm no HS 100 2 2580mm no HS 2 2580mm with HS 75 JEDEC no HS 50 25 POWER CONDITIONING - SMT 4. 2580 mm2 Copper Area HMC976LP3E Evaluation PCB with Heat Sink (HS) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 POWER DISSIPATION (W) 0.8 0.9 1 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com 10 HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Figure 16. HMC976LP3E JUNCTION TEMPERATURE C vs. TOTAL POWER DISSIPATION 85C AMBIENT JUNCTION TEMPERATURE Tj (C) 150 115C WORST CASE THERMAL SHUTDOWN 125 Tjmax 100 2 1000mm no HS 2 2580mm no HS 75 2 2 100 mm no HS 2580mm with HS JEDEC no HS 50 25 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 POWER DISSIPATION (W) POWER CONDITIONING - SMT Figure 17. HMC976LP3E 3.3V User Application Schematic 11 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com HMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Figure 19. HMC976LP3E 5V User Application Schematic For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 978-250-3343 tel * 978-250-3373 fax * Order On-line at www.hittite.com Application Support: apps@hittite.com POWER CONDITIONING - SMT Figure 18. HMC976LP3E 4.8V User Application Schematic 12 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc.: HMC976LP3ETR HMC976LP3E 131671-HMC976LP3E