EL2140CS Elantec Inc, EL2140CS Datasheet

EL2140CS

Manufacturer Part Number

EL2140CS

Description

150MHz differential twisted pair driver

Manufacturer

Elantec Inc

Datasheet

1.EL2140CS.pdf (12 pages)

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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

1995 Elantec Inc

Features

Applications

Ordering Information

EL2140CN

EL2140CS

EL2141CN

EL2141CS

Part No

Fully differential inputs outputs

and feedback

Differential input range

150 MHz 3 dB bandwidth

800 V

supply

50 mA minimum output current

Output swing (200

within 1 5V of supplies

(14V pk-pk differential)

Low power-11 mA typical supply

current

Twisted pair driver

Differential line driver

VGA over twisted pair

ADSL HDSL driver

Single ended to differential

amplification

Transmission of analog signals in

a noisy environment

55 dB distortion at 3 MHz

75 dB distortion at 100 kHz

5V supplies or

Temp Range

40 C to

s slew rate

85 C 8-pin PDIP MDP0031

85 C 8-pin SOIC MDP0027

85 C 8-pin PDIP MDP0031

85 C 8-pin SOIC MDP0027

Package

6V single

load) to

Outline

2 3V

EL2140C 2141C

150 MHz Differential Twisted Pair Driver

General Description

The EL2140C 2141C is a very high bandwidth amplifier whose

output is in differential form and is thus primarily targeted for

applications such as driving twisted pair lines or any applica-

tion where common mode injection is likely to occur The input

signal can be in either single-ended or differential form but the

output is always in differential form

On the EL2141C two feedback inputs provide the user with the

ability to set the device gain (stable at minimum gain of two)

whereas the EL2140C comes with a fixed gain of two

The output common mode level is set by the reference pin

erally this pin is grounded but it can be tied to any voltage

reference

The transmission of ADSL HDSL signals requires very low

distortion amplification so this amplifier was designed with

this as a primary goal The actual signal distortion levels de-

pend upon input and output signal amplitude as well as the

output load impedance (See distortion data inside )

Both outputs (V

withstand temporary overload condition

Connection Diagrams

REF

) which has a

EL2140C

OUT

3 dB bandwidth of over 100 MHz Gen-

OUTB

2140-1

) are short circuit protected to

EL2141C

2140-2

Related parts for EL2140CS

EL2140CS Summary of contents

Page 1

... Transmission of analog signals in a noisy environment Ordering Information Part No Temp Range Package Outline EL2140CN 8-pin PDIP MDP0031 b a EL2140CS 8-pin SOIC MDP0027 b a EL2141CN 8-pin PDIP MDP0031 b a EL2141CS 8-pin SOIC MDP0027 ...

Page 2

EL2140C 2141C 150 MHz Differential Twisted Pair Driver Absolute Maximum Ratings Supply Voltage (V – Maximum Output Current Storage Temperature Range Operating Junction Temperaure Important Note All parameters having Min Max specifications are ...

Page 3

MHz Differential Twisted Pair Driver AC Electrical Characteristics Parameter Description BW Bandwidth (EL2140C and EL2141C ...

Page 4

EL2140C 2141C 150 MHz Differential Twisted Pair Driver Typical Performance Curves I vs Supply Voltage S EL2141 Frequency Response vs Resistor R2 (GAIN 2) e EL2141 Frequency Response vs Resistor R2 (GAIN 8) e EL2140 Frequency Response 2140-3 Frequency Response ...

Page 5

Typical Performance Curves EL2140 CMRR vs Frequency EL2140 Small Signal Response (Note 1) Note 1 Photo shows voltages on a 100 transmission line terminated at both ends so voltages at V values shown EL2140C 2141C 150 MHz Differential Twisted Pair ...

Page 6

EL2140C 2141C 150 MHz Differential Twisted Pair Driver Applications Information EL2141C GAIN e R2 Choice of feedback resistor There is little to be gained from choosing resistor R2 values below 400 and in fact it would ...

Page 7

Applications Information H3 The third harmonic should be the dominant harmonic and is primarily affected by output load current which of course is unavoidable However this should encourage the user not to waste current in the gain setting resistors and ...

Page 8

EL2140C 2141C 150 MHz Differential Twisted Pair Driver Typical Applications Circuits Figure 2 Dual Coaxial Cable Driver Figure 3 Single Supply Twisted Pair Driver Contd 8 2140-16 2140-17 ...

Page 9

Typical Applications Circuits Figure 4 Differential Line Driver with Equalization Gain (See Figure (R2 R4 Gain e (R2 R4) 1 where ...

Page 10

EL2140C 2141C 150 MHz Differential Twisted Pair Driver Typical Applications Circuits Figure 6 Dual Signal Transmission Circuit Contd 10 2140-20 ...

Page 11

11 ...

Page 12

... MHz Differential Twisted Pair Driver General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown Elantec Inc reserves the right to make changes in the circuitry or specifications contained herein at any time without notice Elantec Inc assumes no responsibility for the use of any ...

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