ELANT EL5185CS-T7, EL5185CS-T13, EL5185CS Datasheet

EL5185C - Preliminary

4ns High-Speed Comparator

EL5185C - Preliminary

Features

• 4ns typ. propagation delay

• 5V to 12V input supply

• +2.7V to +5V output supply

• True-to-ground input

• Rail-to-rail outputs

• Separate analog and digital
supplies

• Active low latch

• Dual available (EL5285C)

• Window comparator (EL5287C)

• Quad available (EL5485C &
EL5486C)

• Pin-compatible 6ns family
available (EL5x81C, EL5283C &
EL5482C)

Applications

• Threshold detection

• High speed sampling circuits

• High speed triggers

• Line receivers

• PWM circuits

• High speed V/F converters

General Description

The EL5185C 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 EL5185C can be used to hold the comparator
output value by applying a low logic level to the pin.

The EL5185C is available in the 8-pin SO package and is specified for
operation over the -40°C to +85°C temperature range. Also available
are dual (EL5285C), window comparator (EL5287C), and quad
(EL5485C and EL5486C) versions.

Pin Configuration

Ordering Information

1

Part No. Package Tape & Reel Outline #

EL5185CS 8-Pin SO - MDP0027

EL5185CS-T7 8-Pin SO 7” MDP0027

EL5185CS-T13 8-Pin SO 13” MDP0027

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.

VS+

IN+

VS-

2

+

3

4

-

EL5185CS

(8-Pin SO)

IN-

8

VSD

L

OUT

7

A
T
C

GND

6

H

LATCH

5

September 6, 2001

EL5185C - Preliminary

4ns High-Speed Comparator

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

EL5185C - Preliminary

Digital Supply Voltage (VSD to GND) +7V

Differential Input Voltage [(VS-) -0.2V] to [(VS+) +0.2V]

Common-mode Input Voltage [(VS-) -0.2V] to [(VS+) +0.2V]

= 25°C)

A

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 TBDmW

ESD Voltage 2kV

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, R

Parameter Description Condition Min Typ Max Unit

V

OS

I

B

C

IN

I

OS

V

CM

A

VO

CMRR Common-mode Rejection Ratio -5V < V

PSRR Power Supply Rejection Ratio 60 dB

V

OH

V

OL

V

LH

V

LL

I

LH

I

LL

IS+ Positive Analog Supply Current 10.5 mA

IS- Negative Analog Supply Current 7.5 mA

I

DD

td+ Positive Going Delay Time V

td- Negative Going Delay Time V

tpd+ Latch Disable to High Delay 6 ns

tpd- Latch Disable to Low Delay 8 ns

t

s

t

h

tpw(D) Minimum Latch Disable Pulse Width 5 ns

= 2.3kΩ, C

L

Input Offset Voltage V

= 15pF, TA = 25°C, unless otherwise specified.

L

= 0V, VO = 2.5V 2 4 mV

CM

Input Bias Current 8 15 µA

Input Capacitance 5 pF

Input Offset Current V

= 0V, VO = 2.5V 100 500 nA

CM

Input Voltage Range (VS-) - 0.1 (VS+) - 2V V

Large Signal Voltage Gain 5000 V/V

< +2.75V, VO = 2.5V 80 dB

CM

Output High Voltage V

Output Low Voltage V

> 250mV VSD - 0.5V VSD - 0.4V V

IN

> 250mV GND + 0.4V GND + 0.5V V

IN

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 1 20 µA

LH

= 0.3V 40 80 µA

LL

Digital Supply Current 6 mA

= 5mV, CL = 15pF, IO = 2mA 4 6 ns

OD

= 5mV, CL = 15pF, IO = 2mA 4 6 ns

OD

Minimum Setup Time 2 ns

Minimum Hold Time 1 ns

2

Typical Performance Curves

EL5185C - Preliminary

EL5185C - Preliminary

4ns High-Speed Comparator

Supply Current vs Supply Voltage
(per comparator)

10

VIN=50mV
RL=2.2k

8

6

(mA)

S

I

4

2

0

0 1 2 3 4 5 6

Offset Voltage vs Temperature

3

2.5

2

(mV)

1.5

OS

V

1

0.5

0

-50 -30 10 30 50 70 90

IS+

IS-

±VS (V)

-10

Temperature (°C)

Output High Voltage vs Temperature

4.832

4.83

4.828

4.826

(V)

OH

V

4.824

4.822

4.82

4.818

-50 -30 10 30 50 70 90

Input Bias Current vs Temperature

8

7

6

5

4

IB (µA)

3

2

1

0

-50 -30 30 50 90

-10

Temperature (°C)

-10

10 70

Temperature (°C)

Output Low Voltage vs Temperature

0.285

0.275

0.265

(V)

OL

V

0.255

0.245

0.235

-50 -30 10 30 50 70 90

-10

Temperature (°C)

Supply Current vs Temperature
(per comparator)

12

11

10

9

8

Supply Current (mA)

7

6

-50 10 70 90

IS+

IS-

-30

Temperature (°C)

50

30-10

3

EL5185C - Preliminary

4ns High-Speed Comparator

Typical Performance Curves

Propagation Delay vs Overdrive
VIN=5V

EL5185C - Preliminary

Delay Time (ns)

Delay Time (ns)

STEP

7.8

7.6

7.4

7.2

7

6.8

6.6

6.4

6.8

6.6

6.4

6.2

6

5.8

5.6

TPD-

TPD+

0.2 0.6 1 1.4 1.8 2.2 2.6

VOD (V)

Propagation Delay vs Supply Voltage

TPD-

TPD+

4 4.2 4.8 5.2 5.4 5.6 6

4.4

54.6 5.8

±VS (V)

VS=±5V
VSD=5V
RL=2.2k

VSD=VS+
VOD=50mV
RL=2.2k

Propagation Delay vs Source Resistance
VIN=1V

STEP

15

VS=±5V
VSD=5V
VOD=50mV

13

RL=2.2k

11

9

Delay Time (ns)

7

5

0 1.6 2

Digital Supply Current vs Switching Frequency
(per comparator)

25

VS=±5V
TA=25°C

20

15

(mA)

SD

I

10

5

0

0 20 40 50

TPD-

0.4 1.20.8

Source Resistance (kΩ)

VSD=5V

10

Frequency (MHz)

TPD+

VSD=3V

30

Propagation Delay vs Overdrive
VIN=1V

STEP

6.1

6

5.9

5.8

5.7

5.6

Delay Time (ns)

5.5

5.4

5.3

5.2

50 100 250 300 400 500 600

150

TPD-

TPD+

350 450 550200

VOD (mV)

VS=±5V
VSD=5V
RL=2.2k

Propagation Delay vs Overdrive
VIN=3V

STEP

8

7.5

7

6.5

Delay Time (ns)

6

5.5

5

0.2 0.6 0.8 1.2 1.6 2

TPD-

TPD+

1 1.4 1.80.4

VOD (mV)

VS=±5V
VSD=5V
RL=2.2k

4