HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE COMPARATORS - SMT 6 Typical Applications Features The HMC874LC3C is ideal for: Propagation Delay Clock to Output: 120 ps • ATE Applications Overdrive & Slew Rate Dispersion: 10 ps • High Speed Instrumentation Minimum Pulse Width: 60 ps • Digital Receiver Systems Resistor Programmable Hysteresis • Pulse Spectroscopy Differential Clock Control • High Speed Trigger Circuits Input Bandwidth: 10 GHz • Clock & Data Restoration Power Dissipation: 150 mW RSCML and RSECL Versions Available 16 Lead 3x3mm SMT Package: 9mm 2 Functional Diagram General Description The HMC874LC3C is a SiGe monolithic, ultra fast comparator which features reduced swing PECL output drivers and clock inputs. The comparator supports 20 Gbps operation while providing 120 ps clock to data output delay and 60 ps minimum pulse width with 0.2 ps rms random jitter (RJ). 25 Gbps operation can be achieved with reduced output voltage swing. 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 PECL output stages are designed to directly drive 400 mV into 50 Ohms terminated to +1.3V while maintaining compatibility with other PECL logic families. The HMC874LC3C features high speed latches with programmable hysteresis, and is configured to operate as a clocked comparator. Electrical Specifi cations TA = +25C, Vcci= +3.3V, Vcco = +3.3V, CLK / CLK = 1.6 to 2.4V, Vee = -3V, VTERM = +1.3V 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 15 KΩ ±1 mV Differential Input Impedance Hysteresis 6 - 50 Min. Rhys = ∞ For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Latch Enable Characteristics Conditions Min. Each Pin Typ. Max 50 Clock to Data Output Delay, tdp Ω 120 Clock Enable Input Range 1.6 Clock Max Frequency, fmax Units ps 2.4 25 V GHz DC Output Characteristics, Vcco = +3.3V, VTERM = +1.3V Parameter Conditions Min. Typ. Max Units V Output Voltage High Level, Voh 2.30 2.42 Output Voltage Low Level, Vol 1.94 2.10 V Output Voltage Differential Swing 320 420 mV Max Units AC Performance Parameter Conditions VOD Dispersion Tpd vs. Common Mode Dispersion, -1.75V <Vcm <1.75V Min. Typ. 50mV < VOD < 1V 10 ps VOD = 50 mV 8 ps Equivalent Input Bandwidth [1] 13.5 16.2 GHz Deterministic Jitter at 10 Gbps with ±100mV Overdrive <3 ps Random Jitter at 10 Gbps with ±100mV Overdrive 0.2 ps rms VCM = 0; ±100mV Overdrive 60 ps Q / Q Rise Time From 20% to 80% 26 ps Q / Q Fall Time From 20% to 80% 21 ps Deterministic Jitter (pp) Random Jitter (rms) Minimum Pulse Width 6 COMPARATORS - SMT Parameter Clock Enable Input Impedance Power Supply Requirements Parameter Conditions Min. Typ. Max Units Input Supply Current, Icci 11 mA Output Supply Current, Icco 40 mA Vee Current, lee 21 mA Power Dissipation, Pd 150 mW PSRR, Vcci 38 dB PSRR, Vee 38 dB Note 1: Equivalent Input Bandwidth is calculated with the following formula: Bweq=0.22/√ (TRCOMP2-TRIN2) 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, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 - 51 HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Propagation Delay vs. Input Common Mode Voltage[1] Dispersion vs. Overdrive Voltage 6 11 15 12.5 9 ΔtPD (ps) DISPERSION (ps) 5 Rising Edge Falling Edge 7.5 5 2.5 3 0 1 -2.5 -5 -1 0 10 20 30 40 50 60 70 80 90 100 -2 -1.5 Output Voltage vs. Temperature 0.5 1 VOLTAGE (V) 2.3 VOH VOL 2.2 2 2.1 85 100 0.4 0.35 0.3 -32 -19 -6 7 20 33 46 59 72 0.25 -50 85 -35 -20 -5 TEMPERATURE (C) 10 25 40 55 70 TEMPERATURE (C) Delay vs. Temperature Power Dissipation vs. Temperature 40 200 tr tf 35 180 POWER (mW) 30 25 20 160 140 120 15 -35 -20 -5 10 25 40 55 70 85 100 TEMPERATURE (C) 100 -50 -35 -20 -5 10 25 40 55 70 TEMPERATURE (C) [1] Vcci= +3.3V, Vcco = +3.3V, Vee = -3V, V TERM = +1.3V 6 - 52 1.5 0.45 2 DELAY (ps) 0 0.5 2.4 10 -50 -0.5 Voltage Swing vs. Temperature 2.5 1.9 -45 -1 COMMON MODE VOLTAGE (mV) OVERDRIVE VOLTAGE (mV) VOLTAGE (V) COMPARATORS - SMT 10 Rising Edge Falling Edge 7 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 85 100 HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Comparator Hysteresis vs. Rhys Control Resistor Currents vs. Temperature 25 6 50 I_Vcco I_Vee 45 I_Vcci I_Vterm 15 10 35 30 25 20 5 15 0 1 10 100 1000 10 -50 -35 -20 -5 10 25 40 55 70 85 100 TEMPERATURE (C) RESISTANCE (Ohm) Comparator Hysteresis vs. Clock Frequency (Rhys = ∞) Eye Diagram 10 HYSTERESIS (mV) 8 COMPARATORS - SMT 40 CURRENT (mA) HYSTERESIS (mV) 20 6 4 2 0 1 10 100 FREQUENCY (MHz) TJ(1E-12): 6.71 ps RJ(δ-δ): 310 fs PJ(rms) 0.0 s DJ(δ-δ): 3.08 ps RJ(rms): 265 fs DDJ(p-p): 3.24 ps DCD: ------ ISI J(p-p) 3.24 ps Absolute Maximum Ratings Input Supply Voltage (Vcci to GND) -0.5V to +4V Output Supply Voltage (Vcco to GND) -0.5V to +4V Positive Supply Differential (Vcci - Vcco) -0.5V to +3.5V Input Voltage -2V to +2V Differential Input Voltage -2V to +2V Input Voltage, Latch Enable -0.5V to Vcci +0.5V Applied Voltage (HYS) Vee to GND Maximum Input Current ±1 mA Output Current 40 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 Bit Rate 5.00000 Gb/s Pat Length 127 Bits Div. Ratio 1:8 ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 - 53 HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Timing Diagram COMPARATORS - SMT 6 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 NOT BE DC GND. THERMAL DISSIPATION PATH ONLY. 6 - 54 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Pin Descriptions Function Description 1 VTP Termination resistor return pin for INP Input. 2 INP Non-Inverting analog input 3 INN Inverting analog input 4 VTN Termination resistor return pin for INN input 5, 16 Vcci Positive supply voltage input stage. 6 CLK Clock input pin, inverting side. 7 CLK Clock input pin, non-inverting side. 8 CLKRTN Clock RTN pin, connect to GND. 9, 12 Vcco Positive supply voltage for the output stage. 10 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, after a positive transition on CLK and negative transition on CLK. 11 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, after a positive transition on CLK and negative transition on CLK. 14 HYS Hysteresis Control pin. This pin should be left disconnected to minimize hysteresis. Connect to Vee with a resistor to add the desired amount of hysteresis. 13 Vee Negative power supply, -3V. 15 RTN Return for ESD protection, connect to GND. Package Base Do not DC GND. Thermal dissipation path only. Interface Schematic For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 COMPARATORS - SMT Pin Number 6 - 55 HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Evaluation PCB COMPARATORS - SMT 6 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 HMC874LC3C Comparator PCB 125929 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 should be connected directly to the ground plane similar to that shown. The exposed paddle should not be electronically connected to DC GND, thermal dissipation path only. 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 6 - 56 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC874LC3C v01.1009 20 Gbps CLOCKED COMPARATOR with RSPECL OUTPUT STAGE Application Circuit COMPARATORS - SMT 6 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 - 57