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.