FEATURES

LOW OFFSET VOLTAGE: 50mV max

LOW DRIFT: 0.25mV/°C max

LOW INPUT BIAS CURRENT: 2nA max

HIGH COMMON-MODE REJECTION:

115dB min

INPUT OVER-VOLTAGE PROTECTION:

±40V

WIDE SUPPLY RANGE: ±2.25 TO ±18V

LOW QUIESCENT CURRENT: 3mA max

SOL-16 SURFACE-MOUNT PACKAGE

APPLICATIONS

SWITCHED-GAIN AMPLIFIER

BRIDGE AMPLIFIER

THERMOCOUPLE AMPLIFIER

RTD SENSOR AMPLIFIER

MEDICAL INSTRUMENTATION

DATA ACQUISITION

DESCRIPTION

The INA115 is a low cost, general purpose instrumentation

amplifier offering excellent accuracy. Its versatile

three-op amp design and small size make it ideal

for a wide range of applications. Similar to the model

INA114, the INA115 provides additional connections

to the input op amps, A1 and A2, which improve gain

accuracy in high gains and are useful in forming

switched-gain amplifiers.

A single external resistor sets any gain from 1 to

10,000. Internal input protection can withstand up to

±40V without damage.

The INA115 is laser trimmed for very low offset

voltage (50mV), drift (0.25mV/°C) and high commonmode

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

current is 3mA maximum.

The INA115 is available in the SOL-16 surface-mount

package, specified for the –40°C to +85°C temperature

range.