INA126PA vs OPA2340UA vs AD627ARZ Comparison

The INA126PA is a precision instrumentation Amplifier IC for accurate and low noise differential signal acquisition. Their two-op-amp design provides excellent performance with very low quiescent current (175µA/channel). This, combined with a wide operating voltage range of ±1.35 to ±18V, makes them ideal for portable instrumentation and data acquisition systems. Gain can be set from 5 to 10000V/V with a single external resistor. Laser trimmed input circuitry provides low offset voltage (250µV maximum), low offset voltage drift (3µV/°C maximum) and excellent common-mode rejection.

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175µA/Channel Low Quiescent Current

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250µV (Maximum) Low Offset Voltage

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3µV/°C (Maximum) Low Offset Drift

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35nV/Hz Low Noise

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25nA (Maximum) Low Input Bias Current

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Green Product, No Sb/Br

The OPA2340UA is a rail-to-rail CMOS Operational Amplifier, optimized for low-voltage, single-supply operation. Rail-to-rail input/output and high-speed operation make them ideal for driving sampling analogue-to-digital (A/D) converters. They are also well-suited for general purpose and audio applications as well as providing I/V conversion at the output of digital-to-analogue (D/A) converters. Single, dual and quad versions have identical specifications for design flexibility. It operates on a single supply as low as 2.5V with an input common-mode voltage range that extends 500mV below ground and 500mV above the positive supply. Output voltage swing is to within 1mV of the supply rails with a 100k load. They offer excellent dynamic response (BW = 5.5MHz, SR = 6V/µs), yet quiescent current is only 750µA. Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction.

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Rail-to-rail input

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Rail-to-rail output (within 1mV)

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5.5MHz Wide bandwidth

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6V/µs High slew rate

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0.0007% (f = 1kHz) Low THD + N

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750µA Low quiescent current per channel

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Green product and no Sb/Br

The AD627ARZ is a Micropower Single and Dual Supply Rail-to-rail Instrumentation Amplifier that delivers rail to rail output swing on single and dual (+2.2V to ±18V) supplies. The AD627 provides excellent AC and DC specifications while operating at only 85µA maximum. The AD627 offers superior flexibility by allowing the user to set the gain of the device with a single external resistor while conforming to the 8-lead industry-standard pinout configuration. With no external resistor, it is configured for a gain of 5. With an external resistor, it can be set to a gain of up to 1000. Single-supply operation, low power consumption and rail to rail output swing makes it ideal for battery-powered applications. Its rail to rail output stage maximizes dynamic range when operating from low supply voltages. Dual-supply operation (±15V) and low power consumption makes it ideal for industrial applications including 4mA to 20mA loop-powered systems.

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Easy to use

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Higher performance than discrete design

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Rail-to-rail output swing

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High accuracy DC performance

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800kHz Bandwidth (G = +5)

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135µs Settling time to 0.01% (G = +5, 5V step)

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0.03% Typical gain accuracy (G = +5)