FN6293 Rev 6.00

Page 1 of 14

October 9, 2015

FN6293

Rev 6.00

October 9, 2015

EL8171, EL8172

Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers

DATASHEET

The EL8171 and EL8172 are micropower instrumentation

amplifiers optimized for single supply operation over the

+2.4V to +5.5V range. Inputs and outputs can operate

rail-to-rail. As with all instrumentation amplifiers, a pair of

inputs provide very high common-mode rejection and are

completely independent from a pair of feedback terminals.

The feedback terminals allow zero input to be translated to

any output offset, including ground. A feedback divider

controls the overall gain of the amplifier.

The EL8172 is compensated for a gain of 100 or more, and

the EL8171 is compensated for a gain of 10 or more. The

EL8171 and EL8172 have PMOS input devices that provide

sub-nA input bias currents.

The amplifiers can be operated from one lithium cell or two

Ni-Cd batteries. The EL8171 and EL8172 input range goes

from below ground to slightly above positive rail. The output

stage swings completely to ground (ground sensing) or

positive supply - no pull-up or pull-down resistors are

needed.

Pinout

EL8171, EL8172

(8 LD SOIC)

TOP VIEW

Features

• 95µA maximum supply current

• Maximum input offset voltage

- 300µV (EL8172)

- 1500µV (EL8171)

• 50pA maximum input bias current

• 450kHz -3dB bandwidth (G = 10)

• 170kHz -3dB bandwidth (G = 100)

• Single supply operation

- Input voltage range is rail-to-rail

- Output swings rail-to-rail

- Ground sensing

• Pb-free (RoHS compliant)

Applications

• Battery- or solar-powered systems

• Strain gauges

• Current monitors

• Thermocouple amplifiers

1

2

3

4

8

7

6

5



+

-

+

-

DNC

IN-

IN+

V-

FB+

V+

FB-

VOUT

Ordering Information

PART

NUMBER

(Note)

PART

MARKING

PACKAGE

(Pb-free)

PKG.

DWG. #

EL8171FSZ*(No

longer available,

recommended

replacement:

EL8170FSZ-T7)

8171FSZ

8 Ld SOIC

MDP0027

EL8172FSZ*

8172FSZ

8 Ld SOIC

MDP0027

*Add “-T7” suffix for tape and reel. Please refer to TB347 for details

on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets, molding compounds/die attach

materials, and 100% matte tin plate plus anneal (e3 termination

finish, which is RoHS compliant and compatible with both SnPb and

Pb-free soldering operations). Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J STD-020.