Analog Devices AD8564 Datasheet

Quad 7 ns

–IN A
+IN A

GND
OUT A
OUT B

V

–ANA

+IN B

–IN B

–IN D

+IN D
V

+ANA

OUT D
OUT C
V

+DIG

+IN C
–IN C

AD8564

+IN A

GND

OUT A

+IN D
V

+ANA

OUT D

–IN D

1

89

16

AD8564

–IN A

V

+DIG

+IN C
–IN C

OUT C

V

–ANA

+IN B
–IN B

OUT B

a

FEATURES
+5 V Single-Supply Operation
7 ns Propagation Delay
Low Power
Separate Input and Output Sections
TTL and CMOS Logic Compatible Outputs
Wide Output Swing
TSSOP, SOIC and PDIP Packages

APPLICATIONS
High Speed Timing
Line Receivers
Data Communications
High Speed V-to-F Converters
Battery Operated Instrumentation
High Speed Sampling Systems
Window Comparators
Read Channel Detection
PCMCIA Cards
Upgrade for MAX901 Designs

Single Supply Comparator

PIN CONFIGURATIONS

16-Lead Narrow Body SO

(S Suffix)

R-16A

16-Lead TSSOP

(RU-Suffix)

RU-16

AD8564

16-Lead Epoxy DIP

(P Suffix)

N-16

–IN A

1

+IN A

GND

OUT A

V

–ANA

+IN B

–IN B

2

+–

3

4

5

6

+–

7

8

AD8564

–

+

+–

16

15

14

13

12

11

10

9

–IN D

+IN D

V

+ANA

OUT D

OUT COUT B

V

+DIG

+IN C

–IN C

GENERAL DESCRIPTION

The AD8564 is quad 7 ns comparator with separate input and
output supplies, thus enabling the input stage to be operated
from ±5 V dual supplies or a +5 V single supply while maintain­ing a CMOS/TTL-compatible output.

Fast 7 ns propagation delay makes the AD8564 a good choice
for timing circuits and line receivers. Independent analog and
digital supplies provide excellent protection from supply pin
interaction. The AD8564 is pin compatible with the MAX901,
and has lower supply currents.

All four comparators have similar propagation delays. The
propagation delay for rising and falling signals is similar, and
tracks over temperature and voltage. These characteristics
make the AD8564 a good choice for high speed timing and data
communications circuits. For a similar dual comparator with a
latch function, please see the AD8598 data sheet. For a similar
single comparator with latch function, please see the AD8561
data sheet.

The AD8564 is specified over the industrial (–40°C to +85°C)
temperature range. The quad AD8564 is available in the 16­lead plastic DIP, narrow SO-16 surface mount, and 16-lead
TSSOP packages.

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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1999

AD8564–SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

(@ V

+ANA

= V

= +5.0 V, V

+DIG

= 0 V, TA = +25ⴗC unless otherwise noted)

–ANA

Parameter Symbol Conditions Min Typ Max Units

INPUT CHARACTERISTICS

Offset Voltage V

OS

–40°C ≤ T

Offset Voltage Drift ∆V
Input Bias Current I

Input Offset Current I
Input Common-Mode Voltage Range V

/∆T4µV/°C

OS

B

I

B

OS

CM

VCM = 0 V ±4 µA
–40°C ≤ TA ≤ +85°C ±9 µA
VCM = 0 V ±3 µA

Common-Mode Rejection Ratio CMRR 0 V ≤ V
Large Signal Voltage Gain A
Input Capacitance C

VO

IN

RL = 10 kΩ 3000 V/V

≤ +85°C8mV

A

0 +2.75 V

≤ +3.0 V 65 85 dB

CM

2.3 7 mV

3.0 pF

DIGITAL OUTPUTS

Logic “1” Voltage V
Logic “0” Voltage V

OH

OL

IOH = –3.2 mA, ∆VIN > 250 mV 2.4 3.5 V
IOL = 3.2 mA, ∆VIN > 250 mV 0.3 0.4 V

DYNAMIC PERFORMANCE

Propagation Delay t

Propagation Delay t

P

P

200 mV Step with 100 mV Overdrive 6.75 9.8 ns
–40°C ≤ T

≤ +85°C

A

100 mV Step with 5 mV Overdrive

1

1

8ns

13 ns

Differential Propagation Delay

(Rising Propagation Delay vs.

Falling Propagation Delay) ∆t

P

100 mV Step with 20 mV Overdrive

1

0.5 2.0 ns

Rise Time 20% to 80% 3.8 ns

Fall Time 20% to 80% 1.5 ns

POWER SUPPLY

Power Supply Rejection Ratio PSRR +4.5 V ≤ V
Analog Supply Current I

+ANA

–40°C ≤ T

Digital Supply Current I

DIG

VO = 0 V, RL =
–40°C ≤ T

Analog Supply Current I

–ANA

and V

+ANA

≤ +85°C15.6mA

A

∞

≤ +85°C 8.0 mA

A

≤ +5.5 V 80 dB

+DIG

10.5 14.0 mA

6.0 7.0 mA

–7.0 14.0 mA

–40°C ≤ TA ≤ +85°C15.6mA

NOTES

1

Guaranteed by design.

Specifications subject to change without notice.

ELECTRICAL SPECIFICATIONS

(@ V

+ANA

= V

= +5.0 V, V

+DIG

= –5 V, TA = +25ⴗC unless otherwise noted)

–ANA

Parameter Symbol Conditions Min Typ Max Units

INPUT CHARACTERISTICS

Offset Voltage V

OS

–40°C ≤ T

Offset Voltage Drift ∆V
Input Bias Current I

Input Offset Current I
Input Common-Mode Voltage Range V

/∆T4µV/°C

OS

B

I

B

OS

CM

VCM = 0 V ±4 µA
–40°C ≤ TA ≤ +85°C ±9 µA
VCM = 0 V ±3 µA

Common-Mode Rejection Ratio CMRR 0 V ≤ V
Large Signal Voltage Gain A
Input Capacitance C

VO

IN

RL = 10 kΩ 3000 V/V

≤ +85°C8mV

A

–4.9 +3.5 V

≤ +3.0 V 65 85 dB

CM

2.3 7 mV

3.0 pF

DIGITAL OUTPUTS

Logic “1” Voltage V
Logic “0” Voltage V

OH

OL

IOH = –3.2 mA, ∆VIN > 250 mV 2.6 3.6 V
IOL = 3.2 mA, ∆VIN > 250 mV 0.2 0.3 V

–2–

REV. A

AD8564

WARNING!

ESD SENSITIVE DEVICE

Parameter Symbol Conditions Min Typ Max Units

DYNAMIC PERFORMANCE

Propagation Delay t

Propagation Delay t

P

P

Differential Propagation Delay

(Rising Propagation Delay vs.

Falling Propagation Delay) ∆t

P

Rise Time 20% to 80% 3 ns

Fall Time 20% to 80% 3 ns

POWER SUPPLY

Power Supply Rejection Ratio PSRR +4.5 V ≤ V
Analog Supply Current I

Digital Supply Current I

Analog Supply Current I

NOTES

1

Guaranteed by design.

Specifications subject to change without notice.

+ANA

DIG

–ANA

200 mV Step with 100 mV Overdrive 6.75 9.8 ns
–40°C ≤ T

≤ +85°C

A

100 mV Step with 5 mV Overdrive

100 mV Step with 20 mV Overdrive

+ANA

and V

1

1

1

≤ +5.5 V 50 70 dB

+DIG

813ns
8ns

0.5 2.0 ns

10.8 14.0 mA

–40°C ≤ T

≤ +85°C 15.6 mA

A

VO = 0 V, RL = ∞ 3.6 4.4 mA
–40°C ≤ T

≤ +85°C 5.6 mA

A

–8.2 14.0 mA

–40°C ≤ TA ≤ +85°C 15.6 mA

ABSOLUTE MAXIMUM RATINGS

Total Analog Supply Voltage . . . . . . . . . . . . . . . . . . . . . +14 V

Digital Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . +17 V

Analog Positive Supply–Digital Positive Supply . . . . . –600 mV

Input Voltage

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±7 V

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . ±8 V

Output Short-Circuit Duration to GND . . . . . . . . . Indefinite

Storage Temperature Range

N, R, RU Package . . . . . . . . . . . . . . . . . . –65°C to +150°C

Operating Temperature Range . . . . . . . . . . . –40°C to +85°C

Junction Temperature Range

N, R, RU Package . . . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering, 10 sec) . . . . . . . +300°C

ORDERING GUIDE

Temperature Package Package

Model Range Description Options

AD8564AN –40°C to +85°C 16-Lead Plastic DIP N-16
AD8564AR –40°C to +85°C 16-Lead Narrow Body SOIC R-16A
AD8564ARU –40°C to +85°C 16-Lead Thin Shrink Small Outline (TSSOP) RU-16

Package Type ␪

2

JA

␪

JC

Units

16-Lead Plastic DIP (N) 90 47 °C/W
16-Lead Narrow Body SO (R) 113 37 °C/W
16-Lead TSSOP (RU) 180 37 °C/W

NOTES

1

The analog input voltage is equal to ± 7 V or the analog supply voltage, whichever

is less.

2

θJA is specified for the worst case conditions, i.e., θ

for, P-DIP, and θ
TSSOP packages.

is specified for device soldered in circuit board for SOIC and

JA

is specified for device in socket

JA

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 the AD8564 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.

–3–REV. A