National Semiconductor LM6511 Technical data

LM6511
180 ns 3V Comparator

LM6511 180 ns 3V Comparator

March 2003

General Description

The LM6511 voltage comparator is ideal for analog-digital
interface circuitry when only a +3V or +3.3V supply is avail­able. The open-collector output permits signal compatibility
with a wide variety of digital families: +5V CMOS, +3V
CMOS, TTL and so on. Supply voltage may range from 2.7V
to 36V between supply voltage leads. The LM6511 operates
with little power consumption (P
+2.7V and V

This voltage comparator offers many features that are avail­able in traditional sub-microsecond comparators: output
sync strobe, inputs and output may be isolated from system
ground, and wire-ORing. Also, the LM6511 uses the
industry-standard, single comparator pinout configuration.

−

= 0V).

<

9.45 mW at V+=

diss

Connection Diagram

8-Pin SO

Features

(Typical unless otherwise noted)

n Operates at +2.7V, +3V, +3.3V, +5V
n Low Power consumption
n Fast Response Time of 180 ns

<

9.45 mW@V+= 2.7V (max)

Applications

n Portable Equipment
n Cellular Phones
n Digital Level Shifting

01188801

Ordering Information

Package Industrial Temperature Range NSC Package

−40˚C to +85˚C Drawing

8-Pin Small Outline LM6511IM, LM6511IMX M08A

© 2003 National Semiconductor Corporation DS011888 www.national.com

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

LM6511

please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage −0.3 to +36V

Power Dissipation 500 mW

Output Short Circuit Duration 10s

Junction Temperature 150˚C

ESD Rating

(C = +100 pF, R = 1.5 kΩ) 300V

Output to Negative Supply Voltage 50V

Ground to Negative Supply Voltage 30V

±

Differential Input Voltage

30V

Input Voltage (Note 2)

Storage Temperature Range −65˚C to +150˚C

Operating Ratings (Note 1)

Supply Voltage 2.5V to 30V

Temperature Range −40˚C ≤ T

Soldering Information:

SO Package

(Vapor Phase in 60 sec)

SO Package (Infrared in 15 sec)

215˚C
220˚C

Thermal Resistance (θ

SO Package 170˚C/W

)

JA

DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C. Boldface limits apply at the temperature extremes. V+= 2.7V,

−

= 0V, 50Ω≤RL≤ 50kΩ, and IL= 1.0 mA unless otherwise specified

V

Symbol Parameter Conditions Typical LM6511I Units

Limit

V

OS

I

B

I

OS

I

S

V

SAT

A

V

CMRR Common Mode Rejection Ratio 72 dB

I

STROBE

V

IN

Offset Voltage RS≤ 50 kΩ 1.5 5 mV

(Note 3) 8 max

Input Bias Current 38 130

200 nA

Input Offset Current RS≤ 50 kΩ 1.5 20

(Note 3) 50

Positive Supply Current 2.7 3.5

5 mA

Negative Supply Current 1.5 2.0

2.5

Saturation Voltage VIN≤ 10 mV 0.23 0.4 V

I

=8mA 0.4 max

SINK

Large Signal Voltage Gain ∆V

= 2V 40 V/mV

OUT

Strobe ON Current (Note 5) 2.0 5.0 mA max

Input Voltage Range 0.50 V min

+

V

− 1.25 V max

Output Leakage Current V

≥ 10 mV, V

IN

I

STROBE

= 35V, 0.2 nA

OUT

= 3 mA max

J

+85˚C

(Limits)

max

max

≤

AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C. Boldface limits apply at the temperature extremes. V+= 2.7V,

−

= 0V, 50Ω≤RL≤ 50kΩ, and IL= 1.0 mA unless otherwise specified

V

Symbol Parameter Conditions Typical LM6511I Units

Limit

T

R

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to
be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed.

Note 2: The positive input voltage limit is 30V above the negative supply voltage. The negative input voltage limit is equal to the negative supply voltage or 30V
below the positive supply voltage, whichever is less.

Note 3: The offset voltage and offset current limits are the maximum values required to drive the output within a volt of either supply witha1mAload. Therefore,
these parameters define an error band and take into account the worst-case effects of voltage gain and input impedance.

Note 4: This specification is for a 100 mV input step with a 25 mV overdrive.

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Response Time (Note 4) 180 ns

(Limits)

AC Electrical Characteristics (Continued)

Note 5: This specification gives the range of current which must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin

to ground; it should be current driven at 3 mA to 5 mA.

LM6511

LM6511 Typical Performance Characteristics V

Input Bias Current Input Offset Current

01188808

Input Current vs. Input Voltage Common Mode Limits

= 3V unless otherwise noted

S

01188809

01188810

Transfer Function Output Saturation Voltage

01188812

01188811

01188813

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LM6511 Typical Performance Characteristics V

LM6511

Output Current Limiting Supply Current vs. Temperature

= 3V unless otherwise noted (Continued)

S

Output Leakage Current Propagation Delay vs. Overdrive

Typical Application

01188814

01188816

Universal Logic Level Shifter

01188815

01188803

Notes: Because of the very wide operating and output voltage range, the LM6511 may be used to shift logic levels from 3V to TTL or CMOS to the other way
around. By biasing the input to
go to the output logic supply (V

1

⁄2of the input logic supply (VA), this assures that this input remains within the input voltage range. The pull-up resistor should
).

B

01188804

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Schematic Diagram

LM6511

01188805

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Physical Dimensions inches (millimeters) unless otherwise noted

LM6511 180 ns 3V Comparator

8-Pin Small Outline Package (M)

Order Number LM6511IM, LM6511IMX

Package Number M08A

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accordance with instructions for use provided in the

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support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.

labeling, can be reasonably expected to result in a
significant injury to the user.

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