The INA128 and INA129 (INA12x) are low-power,
general-purpose instrumentation amplifiers that offer excellent accuracy. The
versatile three op amp design and small size make these amplifiers an excellent
choice for a wide range of applications. Current-feedback input circuitry provides
wide bandwidth even at high gain (200 kHz at G = 100).A single external resistor sets any gain from 1 to
10,000. The INA128 provides an industry-standard gain equation with a 50-kΩ
resistor. The INA129 gain equation uses a 49.4-kΩ resistor to allow for drop-in
replacements of comparable devices.The INA12x are available in plastic DIP and
surface-mount packages, specified for the –40°C to +85°C temperature range. The
INA128 is also available in a dual configuration, the INA2128.The upgraded INA828 offers a
lower input bias current (0.6 nA, max) and lower noise
(7 nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision
instrumentation amplifiers from Texas Instruments.
