QB Ultrafast, 4 ns Single-Supply Comparators Data Sheet AD8611/AD8612 FEATURES PIN CONFIGURATIONS 4 ns propagation delay at 5 V V+ 1 8 QA AD8611 IN+ 2 7 QA Single-supply operation: 3 V to 5 V IN 3 6 GND TOP VIEW 100 MHz input (Not to Scale) V 4 5 LATCH Latch function Figure 1. 8-Lead Narrow Body SOIC APPLICATIONS (R-8) High speed timing V+ 1 8 QA Clock recovery and clock distribution AD8611 IN+ 2 7 QA TOP VIEW Line receivers IN 3 6 GND (Not to Scale) Digital communications V 4 5 LATCH Phase detectors Figure 2. 8-Lead MSOP High speed sampling (RM-8) Read channel detection 1 QA 14 QB PCMCIA cards 2 13 QA Zero-crossing detector 3 12 GND AD8612 GND High speed analog-to-digital converter (ADC) TOP VIEW 4 11 LEA LEB Upgrade for LT1394 and LT1016 designs (Not to Scale) V 10 V+ 5 6 9 INA INB 7 8 INA+ INB+ Figure 3. 14-Lead TSSOP (RU-14) GENERAL DESCRIPTION The AD8611/AD8612 are single and dual 4 ns comparators The AD8611 has the same pinout as the LT1016 and LT1394, with latch function and complementary output. The latch is not with lower supply current and a wider common-mode input functional if VCC is less than 4.3 V. range, which includes the negative supply rail. Fast 4 ns propagation delay makes the AD8611/AD8612 good The AD8611/AD8612 are specified over the industrial temper- choices for timing circuits and line receivers. Propagation delays ature range (40C to +85C). The AD8611 is available in both for rising and falling signals are closely matched and tracked over 8-lead MSOP and narrow 8-lead SOIC surface-mount packages. temperature. This matched delay makes the AD8611/AD8612 The AD8612 is available in a 14-lead TSSOP surface-mount good choices for clock recovery because the duty cycle of the package. output matches the duty cycle of the input. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no 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, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20002016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 06010-001 06010-002 06010-003AD8611/AD8612 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Optimizing High Speed Performance ..................................... 10 Applications ....................................................................................... 1 Upgrading the LT1394 and LT1016 ......................................... 10 Pin Configurations ........................................................................... 1 Maximum Input Frequency and Overdrive ............................ 10 General Description ......................................................................... 1 Output Loading Considerations ............................................... 10 Revision History ............................................................................... 2 Using the Latch to Maintain a Constant Output .................... 11 Specifications ..................................................................................... 3 Input Stage and Bias Currents .................................................. 11 Absolute Maximum Ratings ............................................................ 5 Using Hysteresis ......................................................................... 11 Thermal Resistance ...................................................................... 5 Clock Timing Recovery ............................................................. 12 ESD Caution .................................................................................. 5 A 5 V, High Speed Window Comparator ................................ 12 Pin Configurations and Function Descriptions ........................... 6 Outline Dimensions ....................................................................... 16 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 17 Applications Information .............................................................. 10 REVISION HISTORY 12/2016Rev. A to Rev. B Changes to Input Voltage Parameter, Table 3 ............................... 5 Added Input Current Parameter, Table 3 ...................................... 5 Deleted Endnote 1, Table 3 .............................................................. 5 Updated Outline Dimensions ....................................................... 17 Changes to Ordering Guide .......................................................... 18 8/2006Rev. 0 to Rev. A Updated Format .................................................................. Universal Added No Latch if VCC < 4.3 V ......................................... Universal Changes to Pin Names ....................................................... Universal Added Pin Configurations and Function Descriptions Page ..... 6 Changes to Table 8 .......................................................................... 12 Changes to Figure 26 ...................................................................... 12 Changes to Ordering Guide .......................................................... 17 4/2000Revision 0: Initial Version Rev. B Page 2 of 20