Coupled

transmission line

ECL driver

Line Termination

IN+

IN-

RHYS

Q

1/2

LMH 7322

Q

10k

RS-PECL

VOH = 3.9V

VOL = 3.5V

LE levels referred to VCCO

5V

-5.2V

+

+

OUTPUT

VT = VCCO-2V

or

VT = VEE

LMH7322

www.ti.com

SNOSAU8H – MARCH 2007 – REVISED MAY 2011

LMH7322 Dual 700 ps High Speed Comparator with RSPECL Outputs

Check for Samples: LMH7322

1

FEATURES

DESCRIPTION

The LMH7322 is a dual comparator with 700 ps

2

•

propagation delay, low dispersion of 75 ps and an

•

Propagation Delay 700 ps

•

Overdrive Dispersion 20 mV-1V 75 ps

voltage range of 2.7V to 12V. The adjustable

•

Fast Rise and Fall Times 160 ps

hysteresis adds flexibility and prevents oscillations.

•

Wide Supply Range 2.7V to 12V

Both the outputs and latch inputs of the LMH7322 are

•

Input Common Mode Range Extends 200 mV

RSPECL compatible. When used in combination with

Below Negative Rail

compatible levels.

•

Adjustable Hysteresis

•

(RS)PECL Outputs (see Application

The LMH7322 is available in a 24-pin WQFN

package.

Information)

•

(RS)PECL Latch Inputs (see Application

Information)

APPLICATIONS

•

Digital Receivers

•

High-Speed Signal Restoration

•

Zero-Crossing Detectors

•

High-Speed Sampling

•

Window Comparators

•

High-Speed Signal Triggering

Typical Application

Figure 1. (RS)ECL to RSPECL Converter

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.