9

FN7309.6

April 24, 2006

Simplified Schematic

Description of Operation and Application

Information

Product Description

The EL5170 and EL5370 are wide bandwidth, low power

and single/differential ended to differential output amplifiers.

They have a fixed gain of 2. The EL5170 is a single channel

differential amplifier. The EL5370 is a triple channel

differential amplifier. The EL5170 and EL5370 have a -3dB

bandwidth of 100MHz while driving a 200

Ω differential load.

The EL5170 and EL5370 are available with a power down

feature to reduce the power while the amplifiers are

disabled.

Input, Output and Supply Voltage Range

The EL5170 and EL5370 have been designed to operate

with a single supply voltage of 5V to 10V or a split supplies

with its total voltage from 5V to 10V. The amplifiers have an

input common mode voltage range from -4.5V to 3.4V for

±5V supply. The differential mode input range (DMIR)

between the two inputs is from -2.3V to +2.3V. The input

voltage range at the REF pin is from -3.3V to 3.8V. If the

input common mode or differential mode signal is outside the

above-specified ranges, it will cause the output signal

distorted.

The output of the EL5170 and EL5370 can swing from -3.3V

to 3.6V at 200

Ω differential load at ±5V supply. As the load

resistance becomes lower, the output swing is reduced.

FIGURE 19. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE

1.136W

QSOP24

1.4

1.2

1

0.8

0.6

0.2

0

0

255075

100

150

AMBIENT TEMPERATURE (°C)

125

85

JEDEC JESD51-7 HIGH EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD

0.4

909mW

SO8

870mW

MSOP8/10

REF

OUT+

OUT-

FBN

FBP

IN-

IN+

200

Ω

200

Ω

400

Ω

EL5170, EL5370