HMC874LC3C v07.0616 20 Gbps CLOCKED COMPARATOR 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 Differential Clock Control Pulse Spectroscopy Input Bandwidth: 10 GHz High Speed Trigger Circuits Power Dissipation: 150 mW Clock & Data Restoration RSCML Version Available 2 16 Lead 3x3 mm SMT Package: 9 mm Functional Diagram General Description The HMC874LC3C is a SiGe monolithic, ultra fast comparator. 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 vol- tage swing. Overdrive and slew rate dispersion are typically 10 ps, making the device ideal for a wide range of applications from ATE to broadband com- munications. The output stages are designed to directly drive 400 mV into 50 ohms terminated to Vtt = (Vcco - 2.0 V). The HMC874LC3C features high-speed latches with programmable hysteresis, and is configured to operate as a clocked comparator. Electrical Specifications T = +25 C, Vcci= +3.3 V, Vcco = +2.0 V, CLK / CLK = 1.6 V to 2.4 V, Vee = -3 V, V = 0 V A tt Parameter Conditions Min. Typ. Max Units Input Voltage Range Maximum DC Input Current = 20 mA -2 2 V Input Differential Voltage -1.75 1.75 V Input Offset Voltage (V ) 5 mV OS Input Offset Voltage, Temperature Coefficient 15 V / C Input Bias Current 15 uA Input Bias Current Temperature Coefficient 50 nA / C Input Offset Current 4 A Input Impedance 50 Common Mode Input Impedance 350 K Differential Input Impedance 15 K Hysteresis Rhys = 1 mV Information furnished by Analog Devices is believed to be accurate and reliable. However, no For price, delivery, and to place orders: Analog Devices, Inc., responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 rights of third parties that may result from its use. Specifications subject to change without notice. No Phone: 781-329-4700 Order online at www.analog.com 1 license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D COMPARATORS - SMTHMC874LC3C v07.0616 20 Gbps CLOCKED COMPARATOR Clock Characteristics Parameter Conditions Min. Typ. Max Units Clock Input Impedance Each Pin 50 Clock to Data Output Delay, tdp 120 ps Clock Input Range 1.6 2.0 2.4 V Clock Max Frequency, fmax 25 GHz DC Output Characteristics, Vcco = +2.0 V, V = 0 V tt Parameter Conditions Min. Typ. Max Units Output Voltage High Level, Voh 1.03 1.09 1.14 V Output Voltage Low Level, Vol 0.65 0.71 0.81 V Output Voltage Differential Swing 440 760 980 mV pp AC Performance Parameter Conditions Min. Typ. Max Units Propagation Delay - t , t , t VOD = 500 mV 80 85 110 ps PD PDL PDH Propagation Delay, Temperature Coefficient 0.45 ps / C Propagation Delay Skew VOD - 500 mV 10 ps (Rising to Falling Transition) 1 VOD Dispersion 50 mV <VOD <1V 10 ps t vs. Common Mode Dispersion, PD VOD = 500 mV 8 ps -1.75 V <Vcm <1.75 V Noise (RTI) 5.9 nV/(Hz) RTI 2 Equivalent Input Bandwidth 8.6 9.3 12 GHz Deterministic Jitter at 10 Gbps Deterministic Jitter (pp) 2 ps with 100 mV Overdrive Random Jitter at 10 Gbps Random Jitter (rms) 0.2 ps rms with 100 mV Overdrive Input Signal Minimum Pulse Width V = 0 100 mV Overdrive 60 ps CM Q / QB Rise Time From 20% to 80% 24 ps Q / QB Fall Time From 20% to 80% 15 ps 1 VOD is the input overdrive voltage, for example, (V - V - V ) where V = input offset voltage. INP INN OS OS 2 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: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 781-329-4700 Order online at www.analog.com 2 Application Support: Phone: 1-800-ANALOG-D COMPARATORS - SMT