INA128UA

DESCRIPTION

The INA128 and INA129 are low power, general purpose instrumentation amplifiers offering excellent
accuracy. Their versatile 3-op amp design and small size make them ideal for a wide range of applications.
Current-feedback input circuitry provides wide bandwidth even at high gain (200kHz at G = 100).

A single external resistor sets any gain from 1 to 10,000. INA128 provides an industry standard gain
equation; INA129’s gain equation is compatible with the AD620.

The INA128/INA129 is laser trimmed for very low offset voltage (50mV), drift (0.5mV/°C) and high common-mode rejection
(120dB at G ³ 100). It operates with power supplies as low as ±2.25V, and quiescent current is only 700mA—ideal for battery
operated systems. Internal input protection can withstand up to ±40V without damage.

The INA128/INA129 is available in 8-pin plastic DIP, and SO-8 surface-mount packages, specified for the –40°C to +85°C
temperature range. The INA128 is also available in dual configuration, the INA2128.

FEATURES

LOW OFFSET VOLTAGE: 50mV max
LOW DRIFT: 0.5mV/°C max
LOW INPUT BIAS CURRENT: 5nA max
HIGH CMR: 120dB min
INPUTS PROTECTED TO ±40V
WIDE SUPPLY RANGE: ±2.25 to ±18V
LOW QUIESCENT CURRENT: 700mA
8-PIN PLASTIC DIP, SO-8

APPLICATIONS

BRIDGE AMPLIFIER
THERMOCOUPLE AMPLIFIER
RTD SENSOR AMPLIFIER
MEDICAL INSTRUMENTATION
DATA ACQUISITION

Documents:
datasheet