ad8468 Analog Devices, Inc., ad8468 Datasheet

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ad8468

Manufacturer Part Number
ad8468
Description
Rail-to-rail, Fast, Low Power 2.5 V To 5.5 V, Single-supply Ttl/cmos Comparator
Manufacturer
Analog Devices, Inc.
Datasheet

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Part Number:
ad8468WBKSZ-R7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Preliminary Technical Data
FEATURES
Fully specified rail to rail at V
Input common-mode voltage from −0.2 V to V
Low glitch CMOS-/TTL-compatible output stage
40 ns propagation delay
Low power: 1 mW at 2.5 V
Shutdown pin
Power supply rejection > 60 dB
−40°C to +125°C operation
AEC–Q100 Qualified
APPLICATIONS
Automotive applications
High speed instrumentation
Clock and data signal restoration
Logic level shifting or translation
High speed line receivers
Threshold detection
Peak and zero-crossing detectors
High speed trigger circuitry
Pulse-width modulators
Current-/voltage-controlled oscillators
GENERAL DESCRIPTION
The AD8468 is a fast comparator fabricated on XFCB2.0, an
Analog Devices, Inc., proprietary process. This comparator is
exceptionally versatile and easy to use. Features include an input
range from V
compatible output drivers, and shutdown inputs. The device
offers 40 ns propagation delays driving a 15 pF load with 10 mV
overdrive on 500 μA typical supply current.
A flexible power supply scheme allows the device to operate
with a single 2.5 V positive supply and a −0.2 V to + 2.7 V
input signal range up to a 5.5 V positive supply with a −0.2 V
to +5.7 V input signal range.
Rev. PrA
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.
EE
− 0.2 V to V
CC
+ 0.2 V, low noise, TTL-/CMOS-
CC
= 2.5 V to 5.5 V
Rail-to-Rail, Fast, Low Power 2.5 V to 5.5 V,
CC
+ 0.2 V
Single-Supply TTL/CMOS Comparator
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The TTL-/CMOS-compatible output stage is designed to drive
up to 15 pF with full rated timing specifications and to degrade
in a graceful and linear fashion as additional capacitance is
added. The input stage of the comparator offers robust protec-
tion against large input overdrive, and the outputs do not phase
reverse when the valid input signal range is exceeded.
The AD8468 is available in a tiny 6-lead SC70 package with a
single-ended output and a shutdown pin.
NONINVERTING
INVERTING
FUNCTIONAL BLOCK DIAGRAM
INPUT
INPUT
©2010 Analog Devices, Inc. All rights reserved.
+
ADCMP608
AD8468
Figure 1.
S
DN
Q OUTPUT
AD8468
www.analog.com

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ad8468 Summary of contents

Page 1

... The input stage of the comparator offers robust protec- tion against large input overdrive, and the outputs do not phase reverse when the valid input signal range is exceeded. The AD8468 is available in a tiny 6-lead SC70 package with a single-ended output and a shutdown pin. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. ...

Page 2

... AD8468 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 Preliminary Technical Data Application Information...................................................................7 Power/Ground Layout and Bypassing........................................7 TTL-/CMOS-Compatible Output Stage ....................................7 Optimizing Performance ...

Page 3

... 4.5 8 < 125 < 0 2.5 550 800 1.375 4.95 −50 250 AD8468 Max Unit +5.0 mV +0.4 μA +1.0 μA pF 7000 kΩ 4000 kΩ +0 μA ...

Page 4

... AD8468 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltages Supply Voltage (V to GND) CC Supply Differential Input Voltages Input Voltage Differential Input Voltage Maximum Input/Output Current Shutdown Control Pin Applied Voltage (S to GND) DN Maximum Input/Output Current Output Current Temperature Operating Temperature, Ambient Operating Temperature, Junction Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device ...

Page 5

... V Inverting Analog Input Shutdown. Drive this pin low to shut down the device Supply ADCMP608 TOP VIEW (Not to Scale Figure 2. Pin Configuration . N Rev. PrA | Page AD8468 , is greater than the P ...

Page 6

... AD8468 TYPICAL PERFORMANCE CHARACTERISTICS 25°C, unless otherwise noted –1 –2 +125°C –3 +25°C –4 –40°C –5 –1.0 –0.5 0 0.5 1.0 1 (2.5V Figure 3. Input Bias Current vs. Input Common-Mode Voltage 5.5V CC RISE DELAY ...

Page 7

... Specified propagation delay performance can be achieved only by keeping the capacitive load at or below the specified minimums. The output of the AD8468 is designed to directly drive one Schottky TTL, or three low power Schottky TTL loads, or the equivalent. For large fanouts, buses, or transmission lines, use an appropriate buffer to maintain the excellent speed and stability of the comparator ...

Page 8

... OS this point, normally V and there are changes in measured offset voltages and currents. DISPERSION The AD8468 slightly elaborates on this scheme. Crossover points can be found at approximately 0.8 V and 1.6 V. MINIMUM INPUT SLEW RATE REQUIREMENT With the rated load capacitance and normal good PC board design practice, as discussed in the Optimizing Performance ...

Page 9

... Preliminary Technical Data TYPICAL APPLICATION CIRCUITS 2. 0.1µF INPUT 2kΩ ADCMP608 2kΩ OUTPUT 0.1µF Figure 12. Self-Biased, 50% Slicer CMOS ADCMP608 LVDS 100Ω OUTPUT Figure 13. LVDS-to-CMOS Receiver Rev. PrA | Page AD8468 ...

Page 10

... AD8468 OUTLINE DIMENSIONS 2.20 2.00 1.80 2.40 1. 1.25 2.10 1.80 1. PIN 1 0.65 BSC 1.30 BSC 1.00 0.40 1.10 0.90 0.10 0.80 0.70 0.30 0.10 MAX SEATING 0.15 PLANE 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-203-AB Figure 14. 6-Lead Thin Shrink Small Outline Transistor Package (SC70) (KS-6) Dimensions shown in millimeters Rev. PrA | Page Preliminary Technical Data 0.46 0.36 0.22 0.26 0.08 ...

Page 11

... Preliminary Technical Data NOTES Rev. PrA | Page AD8468 ...

Page 12

... AD8468 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR08853-0-1/10(PrA) Preliminary Technical Data Rev. PrA | Page ...

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