®

INA114

1

FEATURES

q LOW OFFSET VOLTAGE: 50

q LOW DRIFT: 0.25

q LOW INPUT BIAS CURRENT: 2nA max

q HIGH COMMON-MODE REJECTION:

115dB min

q INPUT OVER-VOLTAGE PROTECTION:

q WIDE SUPPLY RANGE:

q LOW QUIESCENT CURRENT: 3mA max

q 8-PIN PLASTIC AND SOL-16

INA114

DESCRIPTION

The INA114 is a low cost, general purpose instrumen-

tation amplifier offering excellent accuracy. Its versa-

tile 3-op amp design and small size make it ideal for a

wide range of applications.

A single external resistor sets any gain from 1 to 10,000.

Internal input protection can withstand up to

±40V

without damage.

The INA114 is laser trimmed for very low offset voltage

(50

µV), drift (0.25µV/°C) and high common-mode

rejection (115dB at G = 1000). It operates with power

supplies as low as

±2.25V, allowing use in battery

operated and single 5V supply systems. Quiescent cur-

rent is 3mA maximum.

The INA114 is available in 8-pin plastic and SOL-16

surface-mount packages. Both are specified for the

–40

°C to +85°C temperature range.

APPLICATIONS

q BRIDGE AMPLIFIER

q THERMOCOUPLE AMPLIFIER

q RTD SENSOR AMPLIFIER

q MEDICAL INSTRUMENTATION

q DATA ACQUISITION

A

1

A

2

A

3

(12)

(11)

6

(10)

25k

Ω

25k

Ω

25k

Ω

25k

Ω

(13)

7

(7)

4

(5)

3

(15)

8

(2)

1

(4)

2

V

IN

V

IN

R

G

V+

V–

INA114

DIP

(SOIC)

Ref

DIP Connected

Internally

V

O

G = 1 +

50k

Ω

R

G

–

+

5

Over-Voltage

Protection

25k

Ω

25k

Ω

Over-Voltage

Protection

Feedback

Precision

INSTRUMENTATION AMPLIFIER

®

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

INA114

INA114

PDS-1142D

Printed in U.S.A. March, 1998

SBOS014