ELANT EL5181CS-T7, EL5181CS-T13, EL5181CS Datasheet

EL5181C

8ns High-Speed Comparator

EL5181C

Features

• 8ns Typ. Propagation Delay

• 5V to 12V Input Supply

• +2.7V to +5V Output Supply

• True-to-ground Input

• Rail-to-rail Outputs

• Active Low Latch

• Dual Available (EL5281C)

• Window Comparator (EL5283C)

• Quad Available (EL5481C &
EL5482C)

• Pin-compatible 4ns Family
Available (EL5x85C, EL5287C &
EL5486C)

Applications

• Threshold Detection

• High Speed Sampling Circuits

• High Speed Triggers

• Line Receivers

• PWM Circuits

• High Speed V/F Converters

Ordering Information

Part No. Package Tape & Reel Outline #

EL5181CS 8-Pin SO - MDP0027
EL5181CS-T7 8-Pin SO 7” MDP0027
EL5181CS-T13 8-Pin SO 13” MDP0027

General Description

The EL5181C comparator is designed for operation in single supply
and dual supply applications with 5V to 12V between VS+ and VS-.
For single supplies, the inputs can operate from 0.1V below ground for
use in ground sensing applications.

The output side of the comparator can be supplied from a single sup­ply of 2.7V to 5V. The rail-to-rail output swing enables direct
connection of the comparator to both CMOS and TTL logic circuits.

The latch input of the EL5181C can be used to hold the comparator
output value by applying a low logic level to the pin.

The EL5181C is available in the 8-pin SO package and is specified for
operation over the full -40°C to +85°C temperature range. Also avail­able are a dual (EL5281C), a window comparator (EL5283C), and
quad versions (EL5481C and EL5482C).

Pin Configuration

VS+

1

IN+

2

+

IN-

VS-

-

3

4

8

VSD

L

OUT

7

A
T
C

GND

6

H

LATCH

5

EL5181CS

(8-Pin SO)

Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

© 2001 Elantec Semiconductor, Inc.

June 14, 2001

EL5181C

8ns High-Speed Comparator

EL5181C

Absolute Maximum Ratings (T

Absolute maximum ratings are those values beyond which the device
could be permanently damaged. Absolute maximum ratings are stress
ratings only and functional device operation is not implied.

Analog Supply Voltage (VS+ to VS-) +12.6V
Digital Supply Voltage (VSD to GND) +7V
Differential Input Voltage [(VS-) -0.2V] to [(VS+) +0.2V]

= 25°C)

A

Common-mode Input Voltage [(VS-) -0.2V] to [(VS+) +0.2V]
Latch Input Voltage -0.2V to [(VSD) +0.2V]
Storage Temperature Range -65°C to +150°C
Ambient Operating Temperature -40°C to +85°C
Operating Junction Temperature 125°C
Power Dissipation See Curves

Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the

specified temperature and are pulsed tests, therefore: TJ = TC = TA.

Electrical Characteristics

VS = ±5V, VSD = 5V, RL = 2.3kΩ, CL = 15pF, TA = 25°C, unless otherwise specified.

Parameter Description Condition Min Typ Max Unit

Input

V

OS

I

B

C

IN

I

OS

V

CM

CMRR Common-mode Rejection Ratio -5.1V < V

Output

V

OH

V

OL

Dynamic Performance

tpd+ Positive Going Delay Time VIN = 1V
tpd- Negative Going Delay Time VIN = 1V

Supply

IS+ Positive Analog Supply Current 7 8.2 mA
IS- Negative Analog Supply Current 5 6.5 mA
I

SD

PSRR Power Supply Rejection Ratio 60 80 dB

Latch

V

LH

V

LL

I

LH

I

LL

td+ Latch Disable to High Delay 6 ns
td- Latch Disable to Low Delay 6 ns
t

s

t

h

tpw(D) Minimum Latch Disable Pulse Width 10 ns

Input Offset Voltage V

= 0V, VO = 2.5V 1 4 mV

CM

Input Bias Current -6 -3.5 µA
Input Capacitance 5 pF
Input Offset Current V

= 0V, VO = 2.5V -2.5 0.5 2.5 µA

CM

Input Voltage Range (VS-) - 0.1 (VS+) - 2.25 V

< +2.75V 65 90 dB

CM

Output High Voltage V
Output Low Voltage V

> 250mV VSD - 0.6 VSD - 0.4 V

IN

> 250mV GND + 0.25 GND + 0.5 V

IN

, VOD = 50mV 8 12 ns

P-P

, VOD = 50mV 8 12 ns

P-P

Digital Supply Current Output high 4 5 mA

Output low 0.75 1 mA

Latch Input Voltage High 2.0 V
Latch Input Voltage Low 0.8 V
Latch Input Current High V
Latch Input Current Low V

= 3.0V -30 -18 µA

LH

= 0.3V -30 -24 µA

LL

Minimum Setup Time 2 ns
Minimum Hold Time 1 ns

2

Typical Performance Curves

EL5181C

EL5181C

8ns High-Speed Comparator

Positive Supply Current vs Temperature

7.15

7.1

7.05
7

6.95

+ (mA)

6.9

S

I

6.85

6.8

6.75

6.7

-50 -30 -10 10 30 50 70 90
Temperature (°C)

Positive Supply Current vs Supply Voltage

7

VS-=-5V
VSD=5V

6

VIN=50mV
TA=25°C

5

4

+ (mA)

S

3

I

2

1

0

0 71 2 3 4 5 6

VS+ (V)

Input Bias Current vs Temperature

6

5

4

3

IB (µA)

2

1

0

-50 -30 -10 10 30 50 70 90
Temperature (°C)

Negative Supply Current vs Temperature

-4.4

-4.5

-4.6

-4.7

-4.8

- (mA)

S

I

-4.9

-5

-5.1

-5.2

-50 -30 -10 10 30 50 70 90
Temperature (°C)

Negative Supply Current vs Negative Supply
Voltage

5.5
VS+=5V

VSD=5V

5

VIN=50mV
TA=25°C

4.5

- (mA)

S

I

4

3.5

3

0 71 2 3 4 5 6

VS- (V)

Offset Voltage vs Temperature

0.7

0.6

0.5

0.4

0.3

(mV)

0.2

OS

V

0.1

0

-0.1

-0.2

-0.3

-50 -30 -10 10 30 50 70 90
Temperature (°C)

3

EL5181C

8ns High-Speed Comparator

EL5181C

Typical Performance Curves

Propagation Delay vs Overdrive

10

VS=±5V

9.5

VSD=5V
VIN=1V Step

9

RL=2.2kΩ

8.5
8

7.5
7

Delay Time (ns)

6.5
6

5.5
5

0 100 200 300 400 500 600

Propagation Delay vs Supply Voltage

10

VSD=VS+

9.5

VIN=1V Step
VOD=50mV

9

RL=2.2kΩ

8.5
8

7.5
7

Delay Time (ns)

6.5
6

5.5
5

4 4.5 5 5.5 6

Tpd+

Tpd-

VOD (mV)

Tpd+

Tpd-

±VS (V)

Propagation Delay vs Load Capacitance

12

VS=±5V
VSD=5V

11

RL=2.2kΩ
VIN=1V Step
VOD=50mV

10

9

Delay Time (ns)

8

7

6

0 20 40 60 80 100 120

Propagation Delay vs Overdrive

10

9.5
9

8.5
8

7.5

Delay Time (ns)

VS=±5V

7

VSD=5V
VIN=3V Step

6.5

RL=2.2kΩ

6

0 0.2 0.6 1 1.2 1.6 2

0.4 0.8 1.4 1.8

Tpd+

Tpd-

C

LOAD

VOD (V)

(pF)

Tpd+

Tpd-

Propagation Delay vs Overdrive

11

VS=±5V

10.5

VSD=5V
RL=2.2kΩ

10

VIN=5V Step

9.5
9

8.5

Delay Time (ns)

8

7.5
7

0 0.5 1 2 3

Tpd+

Tpd-

1.5 2.5

VOD (V)

Propagation Delay vs Source Resistance

20

VS=±5V

18

VSD=5V
RL=2.2kΩ

16

VIN=1V Step
VOD=50mV

14
12
10

Delay Time (ns)

8
6
4

0 0.2 0.4 1 1.6

Tpd+

Tpd-

0.6 1.41.20.8

Source Resistance (kΩ)

4