INA125P

The INA125 is a low power, high accuracy instrumentation amplifier with a precision voltage reference. It provides complete bridge excitation and precision differential-input amplification on a single integrated circuit. A single external resistor sets any gain from 4 to 10,000. The INA125 is laser-trimmed for low offset voltage (250μV), low offset drift (2μV/°C), and high common-mode rejection (100dB at G = 100). It operates on single (+2.7V to +36V) or dual (±1.35V to ±18V) supplies. The voltage reference is externally adjustable with pin - selectable voltages of 2.5V, 5V, or 10V, allowing use with a variety of transducers. The reference voltage is accurate to ±0.5% (max) with ±35ppm/°C drift (max). Sleep mode allows shutdown and duty cycle operation to save power. The INA125 is available in 16 - pin plastic DIP and SO - 16 surface - mount packages and is specified for the - 40°C to +85°C industrial temperature range.

Applications

• PRESSURE AND TEMPERATURE BRIDGE AMPLIFIERS
• INDUSTRIAL PROCESS CONTROL
• FACTORY AUTOMATION
• MULTI - CHANNEL DATA ACQUISITION
• BATTERY OPERATED SYSTEMS
• GENERAL PURPOSE INSTRUMENTATION

Key features

• LOW QUIESCENT CURRENT: 460μA
• PRECISION VOLTAGE REFERENCE: 1.24V, 2.5V, 5V or 10V
• SLEEP MODE
• LOW OFFSET VOLTAGE: 250μV max
• LOW OFFSET DRIFT: 2μV/°C max
• LOW INPUT BIAS CURRENT: 20nA max
• HIGH CMR: 100dB min
• LOW NOISE: 38nV/√Hz at f = 1kHz
• INPUT PROTECTION TO ±40V
• WIDE SUPPLY RANGE Single Supply: 2.7V to 36V Dual Supply: ±1.35V to ±18V
• 16 - PIN DIP AND SO - 16 SOIC PACKAGES