INA118U/2K5 1 Channel Instrumentation Amplifiers Precision Low
Power Instrumentation Amp
Features
• A newer version of this device is now available: INA818
• Low offset voltage: 50 µV, maximum
• Low drift: 0.5 µV/°C, maximum
• Low input bias current: 5 nA, maximum
• High CMR: 110 dB, minimum
• Inputs protected to ±40 V
• Wide supply range: ±2.25 to ±18 V
• Low quiescent current: 350 µA
• Packages: 8-Pin plastic DIP, SO-8 2
Applications
• Pressure transmitter
• Temperature transmitter
• Weigh scale
• Electrocardiogram (ECG)
• Analog input module • Data acquisition (DAQ)
3 Description
The INA118 is a low-power, general-purpose instrumentation
amplifier offering excellent accuracy. The versatile, three op amp
design and small size make this device an excellent choice for a
wide range of applications. Current-feedback input circuitry
provides wide bandwidth, even at high gain (70 kHz at G = 100).
A single external resistor sets any gain from 1 to 10000. Internal
input protection can withstand up to ±40 V without damage.
The INA118 is laser-trimmed for low offset voltage (50 µV), drift
(0.5 µV/°C), and high common-mode rejection (110 dB at G = 1000).
The INA118 operates with power supplies as low as ±2.25 V, and
quiescent current is only 350 µA, making this device an excellent
choice for battery-operated systems.
The INA118 is available in 8-pin plastic DIP and SO-8 surface-mount
packages, and specified for the –40°C to +85°C temperature range.
The upgraded INA818 offers a lower input stage offset voltage (35
µV, maximum), lower input bias current (0.5 nA maximum) and lower
noise (8 nV/√Hz) at the same quiescent current. See the Device
Comparison Table for a selection of precision instrumentation
amplifiers from Texas Instruments.
