ANALOG DEVICES ADCMP609 Service Manual
Rail-to-Rail, Fast, Low Power 2.5 V to 5.5 V,
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FEATURES
Fully specified rail-to-rail at VCC = 2.5 V to 5.5 V
Input common-mode voltage from −0.2 V to V
Low glitch TTL-/CMOS-compatible output stage
40 ns propagation delay
Low power 1 mW at 2.5 V
Shutdown pin
Programmable hysteresis
Power supply rejection > 60 dB
−40°C to +125°C operation
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
CC
+ 0.2 V
Single-Supply TTL/CMOS Comparator
ADCMP609
FUNCTIONAL BLOCK DIAGRAM
NONINVERTING
INPUT
INVERTING
INPUT
+
ADCMP609
–
S
DN
Figure 1.
Q OUTPUT
06918-001
GENERAL DESCRIPTION
The ADCMP609 is a fast comparator fabricated on XFCB2, an
Analog Devices, Inc., proprietary process. These comparators
are exceptionally versatile and easy to use. Features include an
input range from V
/CMOS-compatible output drivers, and adjustable hysteresis
and/or shutdown inputs.
The device offers 40 ns propagation delay driving a 15 pF load
with 10 mV overdrive on 500 μA typical supply current.
A flexible power supply scheme allows the devices to operate
with a single +2.5 V positive supply and a −0.2 V to +3.0 V
input signal range up to a +5.5 V positive supply with a −0.2 V
to +5.7 V input signal range.
− 0.2 V to VCC + 0.2 V, low noise, TTL-
EE
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 protection against
large input overdrive, and the outputs do not phase reverse when
the valid input signal range is exceeded. A programmable hysteresis
feature is also provided.
The ADCMP609, available in an 8-lead MSOP package, features
a shutdown pin and hysteresis control.
Rev. A
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007–2008 Analog Devices, Inc. All rights reserved.
ADCMP609
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TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
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
REVISION HISTORY
8/08—Rev. 0 to Rev. A
Changes to Table 4 ............................................................................ 5
Changes to Ordering Guide .......................................................... 12
7/07—Revision 0: Initial Version
Applications Information .................................................................8
Power/Ground Layout and Bypassing ........................................8
TTL-/CMOS-Compatible Output Stage ....................................8
Optimizing Performance ..............................................................8
Comparator Propagation Delay Dispersion ..................................8
Comparator Hysteresis .................................................................9
Crossover Bias Point .....................................................................9
Minimum Input Slew Rate Requirement ................................ 10
Typical Applications Circuits ........................................................ 11
Outline Dimensions ....................................................................... 12
Ordering Guide .......................................................................... 12
Rev. A | Page 2 of 12
ADCMP609
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SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VCC = 2.5 V, TA = −40°C to +125°C; typical value is TA = 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
DC INPUT CHARACTERISTICS
Voltage Range VP, VN VCC = 2.5 V to 5.5 V −0.2 VCC + 0.2 V V
Common-Mode Range VCC = 2.5 V to 5.5 V −0.2 VCC + 0.2 V V
Differential Voltage VCC = 2.5 V to 5.5 V VCC V
Offset Voltage VOS −5.0 ±3 +5.0 mV
Bias Current IP, IN −0.4 +0.4 µA
Offset Current −1.0 +1.0 µA
Capacitance CP, CN 1 pF
Resistance, Differential Mode −0.5 V to VCC + 0.5 V 200 7000 kΩ
Resistance, Common Mode −0.5 V to VCC + 0.5 V 100 4000 kΩ
Active Gain AV 80 dB
Common-Mode Rejection Ratio CMRR VCC = 2.5 V 50 dB
V
V
Hysteresis R
HYSTERESIS MODE AND TIMING
Hysteresis Mode Bias Voltage Current − 1 A 1.145 1.25 1.35 V
Minimum Resistor Value Hysteresis = 120 mV 30 120 kΩ
SHUTDOWN PIN CHARACTERISTICS
1
VIH Comparator is operating 2.0 VCC V
VIL Shutdown guaranteed −0.2 +0.4 +0.4 V
IIH V
Sleep Time tSD l
Wake-Up Time tH V
DC OUTPUT CHARACTERISTICS VCC = 2.5 V to 5.5 V
Output Voltage High Level VOH I
Output Voltage Low Level V
AC PERFORMANCE
2
OL
V
Rise Time/Fall Time tR/tF 10% to 90%, VCC = 2.5 V 25 to 50 ns
10% to 90%, VCC = 5.5 V 45 to 75 ns
Propagation Delay tPD V
V
Propagation Delay Skew, Rising to Falling Transition
Propagation Delay Skew, Q to Q
Overdrive Dispersion 10 mV < VOD < 125 mV 12 ns
Common-Mode Dispersion −0.2 V < VCM < VCC + 0.2 V 1.5 ns
POWER SUPPLY
Supply Voltage Range VCC 2.5 5.5 V
Positive Supply Current I
V
VCC
V
Power Dissipation P
D
V
Power Supply Rejection Ratio PSRR VCC = 2.5 V to 5.5 V −50 dB
Shutdown Current ISD V
1
The output is a high impedance mode when the device is in shutdown mode. Note that this feature is to be used with care since the enable/disable time is much
longer than with a true tristate output.
2
VIN = 100 mV square input at 1 MHz, VCM = 0 V, CL = 15 pF, V
= 2.5 V, unless otherwise noted.
CCI
Rev. A | Page 3 of 12
= −0.2 V to +2.7 V
CM
= 5.5 V 50 dB
CC
= ∞ 0.1 mV
HYS
= VCC −6 +6 µA
IH
< 100 µA 300 ns
CC
= 10 mV, output valid 150 ns
PP
= 0.8 mA, VCC = 2.5 V VCC − 0.4 V
OH
IOL = 0.8 mA, VCC = 2.5 V 0.4 V
= 2.5 V to 5.5 V
CC
= 10 mV, VCC = 2.5 V 30 to 50 ns
OD
= 50 mV, VCC = 5.5 V 35 to 60 ns
OD
VCC = 2.5 V 4.5 ns
VCC = 5.5 V 8 ns
VCC = 2.5 V 3 ns
VCC = 5.5 V 4 ns
= 2.5 V 550 650 A
CC
= 5.5 V 800 1100 A
CC
VCC = 2.5 V 1.4 1.7 mW
= 5.5 V 4.5 7 mW
CC
= 2.5 V to 5.5 V 150 260 A
CC
ADCMP609
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ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltages
Supply Voltage (VCC to Ground) −0.5 V to +6.0 V
Supply Differential −6.0 V to +6.0 V
Input Voltages
Input Voltage −0.5 V to VCC + 0.5 V
Differential Input Voltage ±(VCC + 0.5 V)
Maximum Input/Output Current ±50 mA
Shutdown Pin
Applied Voltage (SDN to Ground) −0.5 V to VCC + 0.5 V
Maximum Input/Output Current ±50 mA
Hysteresis Control Pin
Applied Voltage (HYS to Ground) −0.5 V to VCC + 0.5 V
Maximum Input/Output Current ±50 mA
Output Current ±50 mA
Operating Temperature
Ambient Temperature Range −40°C to +125°C
Junction Temperature 150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 3.
Package Type θ
ADCMP609 8-Lead MSOP 130 °C/W
1
Measurement in still air.
1
Unit
JA
ESD CAUTION
Rev. A | Page 4 of 12
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