HMC675LC3C v08.0811 comparators - SMT 1 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE Typical Applications Features The HMC675LC3C is ideal for: Equivalent Input Bandwidth: 10 GHz • ATE Applications Propagation Delay: 100 ps • High Speed Instrumentation Overdrive & Slew Rate Dispersion: 10 ps • Digital Receiver Systems Minimum Pulse Width: 60 ps • Pulse Spectroscopy Resistor Programmable Hysteresis • High Speed Trigger Circuits Differential Latch Control • Clock & Data Restoration Power Dissipation: 100 mW RSPECL and RSECL Versions Available 16 Lead 3 x 3 mm SMT Package: 9 mm 2 Functional Diagram General Description The HMC675LC3C is a SiGe monolithic, ultra fast comparator which features reduced swing (RS) CML output drivers and latch inputs. The comparator supports 10 Gbps operation while providing 100 ps propagation delay and 60 ps minimum pulse width with 0.2 ps rms random jitter (RJ). Overdrive and slew rate dispersion are typically 10 ps, making the device ideal for a wide range of applications from ATE to broadband communications. The reduced swing CML output stage is designed to directly drive 400 mV into 50 Ohms terminated to GND. The HMC675LC3C features high speed latch and programmable hysteresis and may be configured to operate in either latch mode, or as a tracking comparator. Electrical Specifications TA = +25 ºC, Vcci= +3.3 V, Vcco = 0 V, Vee = -3 V, V TERM = 0 Parameter Conditions Input Voltage Range Input Differential Voltage Typ. Max Units -2 2 V -1.75 1.75 V Input Offset Voltage ±5 mV Input Offset Voltage, Temperature Coefficient 15 µV / °C Input Bias Current 15 uA Input Bias Current Temperature Coefficient 50 nA / °C Input Offset Current 4 µA Input Impedance 50 Ω Common Mode Input Impedance 350 KΩ Differential Input Impedance 15 KΩ Active Gain 43 dB Common Mode Rejection Ratio 80 dB ±1 mV Hysteresis 1-1 Min. Rhys = ∞ 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 Application Support: Phone: 978-250-3343 or [email protected] HMC675LC3C v08.0811 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE Parameter Conditions Latch Enable Input Impedance Min. Typ. Each Pin 8 Max Units KΩ Latch to Output Delay, tPLOL , tPLOH VOD = 200 mV 85 ps Latch Minimum Pulse Width, tPL VOD = 200 mV 20 ps Latch Enable Input Range VOD = 200 mV Latch Setup Time, tS VOD = 200 mV 1.6 Latch Hold Time, tH 2.4 V 45 ps -42 ps DC Output Characteristics, with 50 Ω to GND Parameter Conditions Min. Output Voltage High Level, Voh -10 Output Voltage Low Level, Vol -420 Output Voltage Differential Swing Typ. Max Units 0 mV -400 -380 mV 410 400 380 mV Conditions Min. Typ. Max Units VOD = 500 mV 70 100 130 AC Performance Parameter Propagation Delay - tPD, tPDL , tPDH Propagation Delay, Temperature Coefficient Propagation Delay Skew (Rising to Falling Transition) VOD Dispersion TPD vs. Common Mode Dispersion, -1.75V <Vcm <1.75V ps / °C VOD - 500 mV 10 ps 50mV < VOD < 1V 10 ps VOD = 500 mV 3 ps 3.2 Equivalent Input Bandwidth [1] Deterministic Jitter (pp) ps 0.45 Noise (RTI) 8.5 10 nV/√(Hz) RTI 10.5 GHz Deterministic Jitter at 10 Gbps with ±100mV Overdrive 2 ps Random Jitter at 10 Gbps with ±100mV Overdrive 0.2 ps rms Random Jitter (rms) Input Signal Minimum Pulse Width comparators - SMT 1 Latch Enable Characteristics 60 ps Q / QB Rise Time From 20% to 80% 27 ps Q / QB Fall Time From 20% to 80% 18 ps Power Supply Requirements Parameter Conditions Min. Typ. Max Units Input Supply Current, Icci 9 mA Output Supply Current, Icco 8 mA Vee Current, lee 24 mA Power Dissipation, Pd 100 mW PSRR, Vcci 35 dB PSRR, Vee 35 dB Note 1: Equivalent Input Bandwidth is calculated with the following formula: Bweq=0.22/√ (TRCOMP2 -TRIN 2) where TRIN is the 20%/80% transition time of a quasi-Gaussian signal applied to the comparator input, and TRCOMP is the effective transition time digitized by the comparator. 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 Application Support: Phone: 978-250-3343 or [email protected] 1-2 HMC675LC3C v08.0811 Dispersion vs. Overdrive Voltage Propagation Delay vs. Common Mode[1] 11 15 12.5 9 10 Rising Edge Falling Edge 7 ΔtPD DISPERSION (ps) comparators - SMT 1 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE 5 7.5 Rising Edge Falling Edge 5 2.5 3 0 1 -2.5 -5 -1 0 10 20 30 40 50 60 70 80 90 100 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 COMMON MODE VOLTAGE (mV) OVERDRIVE VOLTAGE (mV) Comparator Hysteresis vs. Rhys Control Resistor Output Voltage vs. Temperature 15 0.1 0 HYSTERESIS (mV) VOLTAGE (V) -0.1 VOH VOL -0.2 -0.3 -0.4 10 5 -0.5 -0.6 -45 0 -32 -19 -6 7 20 33 46 59 72 85 TEMPERATURE (C) 100 1000 10000 RESISTANCE (Ohm) Eye Diagram [1] Vcci = 3.3 V, Vcc0 = 0, Vee = -3 V, VTERM = 0 1-3 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 Application Support: Phone: 978-250-3343 or [email protected] HMC675LC3C v08.0811 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE 1 comparators - SMT Timing Diagram Symbol Timing Description tPDH Input to output high delay Propagation delay measured from the time the input signal crosses the reference (± the input offset voltage) to the 50% point of an output low-to-high transition. tPDL Input to output low delay Propagation delay measured from the time the input signal crosses the reference (± the input offset voltage) to the 50% point of an output high-to-low transition. tPLOH Latch enable to output high delay Propagation delay measured from the 50% point of the latch enable signal low-to-high transition to the 50% point of an output low-to-high transition. tPLOL Latch enable to output low delay Propagation delay measured from the 50% point of the latch enable signal low-to-high transition to the 50% point of an output high-to-low transition. tH Minimum hold time Minimum time after the positive transition of the latch enable signal that the input signal must remain unchanged to be acquired and held at the outputs. tPL Minimum latch enable pulse width Minimum time that the latch enable signal must be high to acquire an input signal change. tS Minimum setup time Minimum time before the positive transition of the latch enable signal that an input signal change must be present to be acquired and held at the outputs. tR Output rise time Amount of time required to transition from a low to a high output as measured at the 20% and 80% points. tF Output fall time Amount of time required to transition from a high to a low output as measured at the 20% and 80% points. Voltage overdrive Difference between the input voltages VINP and VINN- VOD 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 Application Support: Phone: 978-250-3343 or [email protected] 1-4 HMC675LC3C v08.0811 comparators - SMT 1 1-5 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE Operational Description The HMC675LC3C is a Latched Comparator with 10 GHz equivalent input bandwidth. The device is comprised of three blocks: 1) An input amplifier, 2) A latch, and 3) An RSCML Output Buffer. The latching circuit is level sensitive, and consists of a single high-speed latch. The HMC675LC3C comparator supports 10 Gb/s operation. The minimum input data latching pulse width is 60 ps. The HMC675LC3C operates in either Track (Transparent) Mode, where the output follows the logical value of the input, or the Latch (Hold) Mode, where the output value is held to the logical value of the comparison result of the input just prior to (LE - LE_bar) going HI. Track Mode operation is selected by either 1) (LE - LE_bar) LO, or 2) LE and LE_bar inputs floating. Latch Mode is selected by (LE - LE_bar) HI. The input impedance of the LE and LE_bar inputs is 8 k ohms, but these inputs can be terminated with 50 ohm external resistors if desired. When DC coupled, the clock inputs operate at an input common mode voltage of 2 V. In this case, any termination resistors would ideally be returned to 2 V. If the clock is AC coupled to the device, the input termination resistors can be returned to ground. 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 Application Support: Phone: 978-250-3343 or [email protected] HMC675LC3C v08.0811 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE Input Supply Voltage (Vcci to GND) -0.5 V to +4 V Output Supply Voltage (Vcco to GND) -0.5 V to +4 V Positive Supply Voltage Differential (Vcci - Vcco) -0.5 V to +3.3 V Input Voltage -2 V to +2 V Differential Input Voltage -2 V to +2 V Input Voltage, Latch Enable -0.5 V to Vcci +0.5 V Applied Voltage (HYS) Vee to GND Maximum Input Current ±1 mA Output Current 20 mA Junction Temperature 125 °C Continuous Pdiss (T = 85 °C) (Derate 20.4 mW/°C above 85 °C) 0.816 W Thermal Resistance (Rth) (Junction to Lead) 49 °C/W Storage Temperature -65 °C to +150 °C Operating Temperature -40 °C to +85 °C ESD Sensitivity (HBM) Class 1A ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS comparators - SMT 1 Absolute Maximum Ratings Outline Drawing NOTES: 1. PACKAGE BODY MATERIAL: ALUMINA 2. LEAD AND GROUND PADDLE PLATING: 30-80 MICROINCHES GOLD OVER 50 MICROINCHES MINIMUM NICKEL. 3. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE. 5. PACKAGE WARP SHALL NOT EXCEED 0.05mm DATUM -C6. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND. 7. Paddle must BE SOLDERED TO Vee. 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 Application Support: Phone: 978-250-3343 or [email protected] 1-6 HMC675LC3C v08.0811 comparators - SMT 1 Pin Descriptions Pin Number Function Description 1 VTP Termination resistor return pin for Vp Input. 2 INP Non-Inverting analog input 3 INN Inverting analog input 4 VTN Termination resistor return pin for Vn input 5, 16 Vcci Positive supply voltage input stage. 6 LE Latch enable bar input pin, inverting side. Refer to the Operational Description for more details. 7 LE Latch enable bar input pin, non-inverting side. Refer to the Operational Description for more details 8 N/C Pin is not connected inside the package. Connect package pin to GND for improved noise. 9, 12 Vcco Positive supply voltage for the output stage. Q Inverting output. Q bar is at logic low if the analog voltage at the non-inverting input, INP, is greater than the analog voltage at the inverting input, INN, provided that the comparator is in compare mode. Refer to the Operational Description for more details Q Non-inverting output. Q is at logic high if the analog voltage at the non-inverting input, INP, is greater than the analog voltage at the inverting input, INN, provided that the comparator is in compare mode. Refer to the Operational Description for more details 14 HYS Hysteresis Control pin. This pin should be left disconnected for zero hysteresis. Connect to Vee with a resistor to add the desired amount of hysteresis. Refer to hysteresis graph to determine the correct sizing of Rhys control resistor. 13 Vee Negative power supply, -3V. 15 RTN Return for ESD protection. Package Base Exposed paddle must be connected to Vee. 10 11 1-7 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE Interface Schematic 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 Application Support: Phone: 978-250-3343 or [email protected] HMC675LC3C 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE 1 Evaluation PCB Front Side comparators - SMT v08.0811 Back Side 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 Application Support: Phone: 978-250-3343 or [email protected] 1-8 HMC675LC3C v08.0811 comparators - SMT 1 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE List of Materials for Evaluation PCB 125932 [1] Item Description J1 8 Pos. Vertical TIN J2 - J7 2.92 mm 40 GHz Jack J8 Terminal Strip, Single Row 3 Pin SMT JP1, JP2 2 Pos. Vertical TIN C1 - C3, C5, C6, C8 - C10 100 pF Capacitor, 0402 Pkg. C4, C7, C11 330 pF Capacitor, 0402 Pkg. C11 - C13 4.7 uF Tantalum TP1 - TP4 DC Pin, Swage Mount U1 HMC675LC3C Comparator PCB 125929 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 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 in order to provide good RF grounding to 25 GHz. The evaluation circuit board shown is available from Hittite upon request. [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 or Arlon 25FR Application Circuit 1-9 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 Application Support: Phone: 978-250-3343 or [email protected] HMC675LC3C v08.0811 10 GHz LATCHED COMPARATOR WITH RSCML OUTPUT STAGE 1 comparators - SMT Notes 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 Application Support: Phone: 978-250-3343 or [email protected] 1 - 10