ANALOG DEVICES ADCMP608, ACMP609 Service Manual

Rail-to-Rail, Fast, Low Power, 2.5 V to 5.5 V,

Single-Supply TTL/CMOS Comparators

Preliminary Technical Data

FEATURES

10 mV sensitivity rail to rail at VCC = 2.5 V
Input common-mode voltage from −0.2 V to V
Low glitch CMOS-/TTL-compatible output stage
30 ns propagation delay
1 mW at 2.5 V
Shutdown pin
Single-pin control for programmable hysteresis and latch
Power supply rejection >60 dB

−40C° to +125C° 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

+ 0.2 V

CC

ADCMP608/ACMP609

FUNCTIONAL BLOCK DIAGRAMS

NONINVERTI NG

INPUT

INVERTING

INPUT

NONINVERTI NG

INPUT

INVERTING

INPUT

+

ADCMP608

–

S

DN

+

ADCMP609

–

S

LE/HYS

Figure 1.

Q OUTPUT

Q OUTPUT

Q OUTPUT

DN

05918-001

GENERAL DESCRIPTION

The ADCMP608 and ADCMP609 are fast comparators
fabricated on Analog Devices’ proprietary XFCB2 process.
These comparators are exceptionally versatile and easy to use.
Features include an input range from V
low noise, TTL-/CMOS-compatible output drivers, and latch
inputs with adjustable hysteresis and/or shutdown inputs.

The devices offer 30 ns propagation delays driving a 15 pF load
with 5 mV overdrive on 350/400 A typical supply current. A
flexible power supply scheme allows the devices to operate with
a single +2.5 V positive supply and a −0.5 V to +3.0 V input
signal range up to a +5.5 V positive supply with a −0.5 V to +6V
input signal range. Split input/output supplies, with no
sequencing restrictions on the ADCMP609, support a wide
input signal range while allowing independent output swing
control.

− 0.5 V to VCC + 0.5 V,

EE

The TTL-/CMOS-compatible output stage is designed to drive
up to 15 pF with full rated timing specs and to degrade in a
graceful and linear fashion as additional capacitance is added.
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 in a
unique single-pin control option.

The ADCMP608 is available in a tiny 6-lead SC70 package with
single-ended output and a shutdown pin.

The ADCMP609, available in an 8-lead MSOP package, features
a shutdown pin, single pin latch, and hysteresis control.

+

Rev. PrA

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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: [phone] www.analog.com
Fax: [phone] ©2006 Analog Devices, Inc. All rights reserved.

ADCMP608/ADCMP609

TABLE OF CONTENTS

Features.............................................................................................. 1

Preliminary Technical Data

Application Information...................................................................9

Applications....................................................................................... 1

Functional Block Diagrams............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Electrical Characteristics ............................................................. 3

Absolute Maximum Ratings............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution.................................................................................. 5

Pin Configuration and Function Descriptions............................. 6

Typical Performance Characteristics ............................................. 7

REVISION HISTORY

2/06—Revision PrA: Preliminary Version

Power/Ground Layout and Bypassing........................................9

TTL-/CMOS-Compatible Output Stage.........................................9

Using/Disabling the Latch Feature..............................................9

Optimizing Performance..............................................................9

Comparator Propagation Delay Dispersion ........................... 10

Comparator Hysteresis .............................................................. 10

Crossover Bias Point .................................................................. 11

Minimum Input Slew Rate Requirement ................................ 11

Typical Application Circuits ......................................................... 12

Timing Information....................................................................... 13

Rev. PrA | Page 2 of 16

Preliminary Technical Data

ADCMP608/ADCMP609

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

V

= V

CCI

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

DC INPUT CHARACTERISTICS

Voltage Range VP, VN VCC = 2.5 V to 5.5 V −0.5 VCC + 0.5 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 +5.0 mV
Bias Current IP, IN −2.0 ±1 +2.0 µA
Offset Current −0.5 +0.5 µA
Capacitance CP, CN TBD pF
Resistance, Differential Mode 0.1 V to VCC 150 kΩ
Resistance, Common Mode −0.5 V to VCC + 0.5 V 100 kΩ
Active Gain AV 80 dB
Common-Mode Rejection CMRR

Hysteresis

LATCH ENABLE PIN CHARACTERISTICS

ADCMP609 only
VIH Hysteresis is shut off 2.0 V
VIL Latch mode guaranteed −0.2 0.4 0.8 V
LIH V
IOL V

HYSTERESIS MODE AND TIMING

Hysteresis Mode Bias Voltage Current sink 0 A 1.08 1.25 1.35 V
Minimum Resistor Value Hysteresis = 60 mV 60 kΩ
Latch Setup Time tS V
Latch Hold Time tH V
Latch to Output Delay t
Latch Minimum Pulse Width tPL V

SHUTDOWN PIN CHARACTERISTICS

VIH Comparator is operating 2.0 VCC V
VIL Shutdown guaranteed −0.2 0.4 0.6 V
IIH V
IOL V
Sleep Time tSD I
Wake-Up Time tH V

DC OUTPUT CHARACTERISTICS V

Output Voltage High Level VOH I
Output Voltage Low Level VOL I

= 3.3 V, TA = 25°C, unless otherwise noted.

CCO

V

PLOH, tPLOL

= 2.5 V, V

CCI

V

= −0.2 V to 2.7 V

CM

= 5.5 V, V

V

CCI

V

= −0.2 V to 5.7 V

CM

= ∞

R

HYS

= V

IH

CCO

= 0.4 V −0.1 mA

IL

= 100 mV 15 ns

OD

= 100 mV 20 ns

OD

VOD = 100 mV 20 ns

= 100 mV 20 ns

OD

= VCC 0.05 mA

IH

= 0 V −0.05 mA

IL

< 100 A 0.6 ns

CC

= 10 mV, output valid 3 ns

OD

= 2.5 V to 6 V

CCO

= 1.6 mA V

OH

= 1.6 mA V

OL

= 2.5 V,

CCO

= 5.5 V,

CCO

50 dB

60 dB

0.1 mV

+ 0.2 V

CCO

+ 0.2 V 0.1 mA

= 2.5 V VCC − 0.4 V

CCO

= 2.5 V 0.4 V

CCO

Rev. PrA | Page 3 of 16

ADCMP608/ADCMP609

Preliminary Technical Data

Parameter Symbol Conditions Min Typ Max Unit

AC PERFORMANCE V

Propagation Delay, CL = 15 pF tPD

Propagation Delay Skew—Rising to

V

= V

CCI

V

CCO

V

OD

V

CCO

V

OD

OD

= 2.5 V to 5.5 V

CCO

= 5.5 V to 2.5 V,

30 ns

= 10 mV

= 2.5 V/5.5 V,

25/30 ns

= 200 mV
= 10 mV 2 ns

Falling Transition
Overdrive Dispersion 10 mV < VOD < 500 mV 4 ns
Slew Rate Dispersion

Small Signal
10% − 90% Duty Cycle Dispersion

Common-Mode Dispersion

10 V/s to 0.1 V/ns
200 mV p-p single ended

1.25 V, 50 V/s,

V

OD

V

= 1.25 V

CM

= 0 V to VCC

V

CM

1 ns

1 ns

0.5 ns

200 m p-p single ended

Toggle Rate

>50% output swing

= 15 pF V

C

L

CCI

= 5 V
RMS Random Jitter RJ VOD = 200 mV, 5 V/ns
Minimum Pulse Width PW
Rise Time tR

Fall Time tF

∆tPD/∆PW < 500 ps 35 ns

MIN

10% to 90% C
V

= 2.5 V to 5 V

CCI

10% to 90% C

= 2.5 V to 5 V

V

CCI

= 15 pF,

LOAD

= 15 pF,

LOAD

TBD Mbps

TBD

25 to 40

ns

ns

25 to 40

ns

POWER SUPPLY

Input Supply Voltage Range V
Output Supply Voltage Range V
Positive Supply Differential

2.5 5.5 V

CCI

2.5 5.5 V

CCO

− V

V

CCI

Operating −3 +3 V

CCO

(ADCMP609)

Positive Supply Differential

V

− V

CCI

Nonoperating −5.5 +5.5 V

CCO

(ADCMP609)
Positive Supply Current I
Positive Supply Current I
Input Section Supply Current

V

VCC

V

VCC

V

I

VCCi

CC

CC

CCI

= 2.5 V 400 A
= 5.5 V 500 A

= 2.5 V 270 mA

(ADCMP609)
Output Stage Supply Current

V

VCCO

= 2.5 V 130 mA

CCO

I

(ADCMP609)
Power Dissipation PD V
Shutdown Current ISD V
Power Supply Rejection PSRR V

= 2.5 V 1 mW

CC

=2.5 V to 5.5 V 50 A

CC

= 2.5 V to 5 V >50 dB dB

CCI

Rev. PrA | Page 4 of 16

Preliminary Technical Data

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltages

Input Supply Voltage (V
Output Supply Voltage

(V

to GND)

CCO

Positive Supply Differential

− V

CCO

)

(V

CCI

to GND) −0.5 V to +6.0 V

CCI

−0.5 V to +6.0 V

−6.0 V to +6.0 V

Input Voltages

Input Voltage −0.5 V to V
Differential Input Voltage

Maximum Input/Output Current

±(V

CCI

±50mA

CCI

+ 0.5 V)

+ 0.5 V

Shutdown Control Pin

Applied Voltage (HYS to GND) −0.5 V to Vcco + 0.5 V
Maximum Input/Output Current

±50 mA

Latch/Hysteresis Control Pin

Applied Voltage (HYS to GND) −0.5 V to V
Maximum Input/Output Current

Output Current

±50 mA
±50 mA

+ 0.5 V

CCO

Temperature

Operating Temperature, Ambient −40°C to +125°C
Operating Temperature, Junction 150°C
Storage Temperature Range −65°C to +150°C

Stress above those listed under Absolute Maximum Ratings may
cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other
conditions above those indicated in the operational sections 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. Thermal Resistance

Package Type θ

ADCMP608 SC70 6-lead 426 °C/W
ADCMP609 MSOP 8-lead 130 °C/W

1

Measurement in still air.

ADCMP608/ADCMP609

1

JA

Unit

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on

the human body and test equipment and can discharge without detection. Although this product features

proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy

electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance

degradation or loss of functionality.

Rev. PrA | Page 5 of 16