ADCMP572_05 AD [Analog Devices], ADCMP572_05 Datasheet

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ADCMP572_05

Manufacturer Part Number
ADCMP572_05
Description
Ultrafast 3.3 V/5 V Single-Supply SiGe Comparators
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
3.3 V/5.2 V single-supply operation
150 ps propagation delay
15 ps overdrive and slew rate dispersion
8 GHz equivalent input rise time bandwidth
80 ps minimum pulse width
35 ps typical output rise/fall
10 ps deterministic jitter (DJ)
200 fs random jitter (RJ)
On-chip terminations at both input pins
Robust inputs with no output phase reversal
Resistor-programmable hysteresis
Differential latch control
Extended industrial −40°C to +125°C temperature range
APPLICATIONS
Clock and data signal restoration and level shifting
Automatic test equipment (ATE)
High speed instrumentation
Pulse spectroscopy
Medical imaging and diagnostics
High speed line receivers
Threshold detection
Peak and zero-crossing detectors
High speed trigger circuitry
GENERAL DESCRIPTION
The ADCMP572 and ADCMP573 are ultrafast comparators
fabricated on Analog Devices’ proprietary XFCB3 Silicon
Germanium (SiGe) bipolar process. The ADCMP572 features
CML output drivers and latch inputs, and the ADCMP573
features reduced swing PECL (RSPECL) output drivers and
latch inputs.
Both devices offer 150 ps propagation delay and 80 ps
minimum pulse width for 10 Gbps operation with 200 fs rms
random jitter (RJ). Overdrive and slew rate dispersion are
typically less than 15 ps.
A flexible power supply scheme allows both devices to operate
with a single 3.3 V positive supply and a −0.2 V to +1.2 V input
signal range or with split input/output supplies to support a
wider −0.2 V to +3.2 V input signal range and an independent
range of output levels. 50 Ω on-chip termination resistors are
Rev. 0
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 rights of third parties that may result from its use.
Specifications subject to change without notice. No 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.
Single-Supply SiGe Comparators
provided at both inputs with the optional capability to be left
open (on an individual pin basis) for applications requiring
high impedance inputs.
The CML output stage is designed to directly drive 400 mV into
50 Ω transmission lines terminated to between 3.3 V to 5.2 V.
The RSPECL output stage is designed to drive 400 mV into
50 Ω terminated to V
commonly used PECL logic families. The comparator input
stage offers robust protection against large input overdrive, and
the outputs do not phase reverse when the valid input signal
range is exceeded. High speed latch and programmable
hysteresis features are also provided.
The ADCMP572 and ADCMP573 are available in a 16-lead
LFCSP package and have been characterized over an extended
industrial temperature range of −40°C to +125°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
V
V
V
V
P
N
TN
TP
NONINVERTING
INVERTING
TERMINATION
TERMINATION
INPUT
INPUT
FUNCTIONAL BLOCK DIAGRAM
HYS
ADCMP572/ADCMP573
ADCMP572
ADCMP573
© 2005 Analog Devices, Inc. All rights reserved.
CCO
V
CCI
− 2 V and is compatible with several
Ultrafast 3.3 V/5 V
Figure 1.
LE INPUT
LE INPUT
CML/
RSPECL
V
CCO
www.analog.com
Q OUTPUT
Q OUTPUT

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ADCMP572_05 Summary of contents

Page 1

FEATURES 3.3 V/5.2 V single-supply operation 150 ps propagation delay 15 ps overdrive and slew rate dispersion 8 GHz equivalent input rise time bandwidth 80 ps minimum pulse width 35 ps typical output rise/fall 10 ps deterministic jitter (DJ) 200 ...

Page 2

ADCMP572/ADCMP573 TABLE OF CONTENTS Electrical Characteristics ................................................................. 3 Absolute Maximum Ratings............................................................ 5 Thermal Considerations.............................................................. 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 Application Information.................................................................. 9 Power/Ground Layout and Bypassing ....................................... 9 CML/RSPECL Output ...

Page 3

ELECTRICAL CHARACTERISTICS 3 −40°C to +125°C, typical at T CCI CCO A Table 1. Parameter DC INPUT CHARACTERISTICS Input Voltage Range Input Differential Voltage Input Offset Voltage Offset Voltage Tempco Input Bias Current ...

Page 4

ADCMP572/ADCMP573 Parameter AC PERFORMANCE Propagation Delay Propagation Delay Tempco Prop Delay Skew—Rising Transition to Falling Transition Overdrive Dispersion Slew Rate Dispersion Pulse Width Dispersion 10% – 90% Duty Cycle Dispersion Common-Mode Dispersion Equivalent Input Bandwidth 1 Toggle Rate Deterministic Jitter ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 2. Parameter SUPPLY VOLTAGE Input Supply Voltage (V to GND) CCI Output Supply Voltage (V to GND) CCO Positive Supply Differential (V − CCI CCO INPUT VOLTAGE Input Voltage Differential Input Voltage Input Voltage, ...

Page 6

ADCMP572/ADCMP573 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 V Termination Resistor Return Pin for Noninverting Analog Input Inverting Analog Input Termination Resistor ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 3 25°C, unless otherwise noted. CCI CCO 100 150 INPUT OVERDRIVE VOLTAGE (mV) Figure 3. Propagation Delay vs. Input Overdrive 158.5 158.0 ...

Page 8

ADCMP572/ADCMP573 –15.0 –15.5 –16.0 –16.5 –17.0 –17.5 –18.0 –18.5 –0.5 –0.3 –0.1 0.1 0.3 0.5 0.7 V INPUT VOLTAGE (V = –0.2V Figure 9. Input Bias Current vs. Input Differential –16.2 –16.3 –16.4 –16.5 –16.6 –16.7 –16.8 –16.9 ...

Page 9

APPLICATION INFORMATION POWER/GROUND LAYOUT AND BYPASSING The ADCMP572/ADCMP573 comparators are very high speed SiGe devices. Consequently essential to use proper high speed design techniques to achieve the specified performance. Of critical importance is the use of low impedance ...

Page 10

ADCMP572/ADCMP573 500 Ω resistor and leaving the LE pin disconnected. In this case, the resistor value does not depend on the the signal return for the output stage and V CCO should of course be connected to ...

Page 11

COMPARATOR HYSTERESIS The addition of hysteresis to a comparator is often desirable in a noisy environment or when the differential input amplitudes are relatively small or slow moving, but excessive hysteresis has a cost in degraded accuracy and slew-induced timing ...

Page 12

ADCMP572/ADCMP573 TYPICAL APPLICATION CIRCUITS 3. ADCMP572 LATCH INPUTS Figure 21. Zero-Crossing Detector with 3.3 V CML Outputs V = 5.2V CCI V CCO ...

Page 13

TIMING INFORMATION Figure 29 illustrates the ADCMP572/ADCMP573 compare and latch timing relationships. Table 4 provides definitions of the terms shown in the figure. LATCH ENABLE LATCH ENABLE DIFFERENTIAL INPUT VOLTAGE Q OUTPUT Q OUTPUT Table 4. Timing Descriptions Symbol Timing ...

Page 14

ADCMP572/ADCMP573 OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range ADCMP572BCP-WP −40°C to 85°C ADCMP572BCP-R2 −40°C to 85°C ADCMP572BCP-RL7 −40°C to 85°C EVAL-ADCMP572BCP ADCMP573BCP-WP −40°C to 85°C ADCMP573BCP-R2 −40°C to 85°C ADCMP573BCP-RL7 ...

Page 15

NOTES Rev Page ADCMP572/ADCMP573 ...

Page 16

ADCMP572/ADCMP573 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04409–0–4/05(0) Rev Page ...

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