1 Features
• Low offset voltage: 10 μV (typ), 35 μV (max)
• Gain drift: 5 ppm/°C (G = 1),
35 ppm/°C (G > 1) (max)
• Noise: 8 nV/√ Hz
• Bandwidth: 2 MHz (G = 1), 270 kHz (G = 100)
• Stable with 1-nF capacitive loads
• Inputs protected up to ±60 V
• Common-mode rejection: 110 dB, G = 10 (min)
• Power supply rejection: 110 dB, G = 1 (min)
• Supply current: 385 μA (max)
• Supply range:
– Single supply: 4.5 V to 36 V
– Dual supply: ±2.25 V to ±18 V
• Specified temperature range: –40°C to +125°C
• Packages: 8-pin SOIC, VSSOP, WSON

2 Applications
• Analog input module
• Flow transmitter
• Battery test
• LCD test
• Electrocardiogram (ECG)
• Surgical equipment
• Process analytics (pH, gas, concentration, force
and humidity)

3 Description
The INA819 is a high-precision instrumentation
amplifier that offers low power consumption and
operates over a very wide single-supply or dualsupply
range. A single external resistor sets any gain
from 1 to 10,000. The device offers high precision as
a result of super-beta input transistors, which provide
exceptionally low input offset voltage, offset voltage
drift, input bias current, input voltage, and current
noise. Additional circuitry protects the inputs against
overvoltage up to ±60 V.
The INA819 is optimized to provide a high commonmode
rejection ratio. At G = 1, the common-mode
rejection ratio exceeds 90 dB across the full input
common-mode range. The device is designed for lowvoltage
operation from a 4.5-V single supply, as well
as dual supplies up to ±18 V.
The INA819 is available in 8-pin SOIC, VSSOP, and
WSON packages, and is specified over the –40°C to
+125°C temperature range.