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LT1711/LT1712

Single/Dual 4.5ns, 3V/5V/

±5V,

Rail-to-Rail Comparators

The LT

featuring rail-to-rail inputs, rail-to-rail complementary out-

puts and an output latch. Optimized for 3V and 5V power

supplies, they operate over a single supply voltage range

from 2.4V to 12V or from

±2.4V to ±6V dual supplies.

The LT1711/LT1712 are designed for ease of use in a

variety of systems. In addition to wide supply voltage

flexibility, rail-to-rail input common mode range extends

100mV beyond both supply rails, and the outputs are

protected against phase reversal for inputs extending

further beyond the rails. Also, the rail-to-rail inputs may be

taken to opposite rails with no significant increase in input

current. The rail-to-rail matched complementary outputs

interface directly to TTL or CMOS logic and can sink 10mA

The LT1711/LT1712 have internal TTL/CMOS compatible

latches for retaining data at the outputs. Each latch holds

data as long as the latch pin is held high. Latch pin

hysteresis provides protection against slow moving or

noisy latch signals. The LT1711 is available in the 8-pin

MSOP package. The LT1712 is available in the 16-pin

narrow SSOP package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

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High Speed Automatic Test Equipment

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Current Sense for Switching Regulators

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Crystal Oscillator Circuits

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High Speed Sampling Circuits

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High Speed A/D Converters

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Pulse Width Modulators

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Window Comparators

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Extended Range V/F Converters

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Fast Pulse Height/Width Discriminators

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Line Receivers

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High Speed Triggers

UltraFast is a trademark of Linear Technology Corporation.

LT1711/LT1712 Propagation Delay

vs Input Overdrive

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Ultrafast: 4.5ns at 20mV Overdrive

5.5ns at 5mV Overdrive

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Rail-to-Rail Inputs

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Rail-to-Rail Complementary Outputs (TTL/CMOS

Compatible)

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Specified at 2.7V, 5V and

±5V Supplies

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Output Latch

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Inputs Can Exceed Supplies Without Phase Reversal

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LT1711: 8-Lead MSOP Package

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LT1712: 16-Lead Narrow SSOP Package

171112 TA01

–

+

LT1711

5V

390

Ω

200pF

* 1% FILM RESISTOR

** NORTHERN ENGINEERING LABS C-2350N-14.31818MHz

5V

FREQUENCY

OUTPUT

3.9k*

0V TO 5V

1M

MV-209

VARACTOR

DIODE

2k

2k

100pF

15pF

Y1**

100pF

0.047

µF

C SELECT

(CHOOSE FOR CORRECT

PLL LOOP RESPONSE)

1M

1M

1M*

1N4148

LT1004-2.5

47k*

1k*

A 4

× NTSC Subcarrier Voltage-Tunable Crystal Oscillator

INPUT OVERDRIVE (mV)

0

3.5

4.0

4.5

+

–

30

50

171112 TA02

3.0

10

20

40

5.0

5.5

6.0

60

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO