XOPA391IDCKR ACTIVE

Features for the OPA391

• Low I_Q: 22 µA
• Gain bandwidth product: 1 MHz
• Low input bias current: 10 fA
• Low offset voltage: ±45 µV (maximum)
• Low drift: ±1.2 µV/°C
• Low supply voltage operation: 1.7 V to 5.5 V
• Rail-to-rail input and output
• High load capacitance drive
• EMI/RFI filtered inputs
• Small package option: SC-70

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Description for the OPA391

The OPA391 features a unique combination of high bandwidth (1 MHz) along with very low quiescent current (22 µA) in a high-precision amplifier. These features combined with rail-to-rail input and output make this device an exceptional choice in high-gain, low-power applications. Ultra-low input bias current of 10 fA, only 45 µV of offset (maximum), and 1.2 µV/°C of drift over temperature help maintain high precision in ratiometric and amperometric sensor front ends that require demanding low-power needs.

The OPA391 uses Texas Instrument’s proprietary e-trim™ operational amplifier technology, enabling a unique combination of ultra-low offset and low input offset drift without the need for any input switching or auto-zero techniques. The CMOS-based technology platform also features a modern, robust output stage design that is tolerant of high output capacitance, alleviating stability problems that are common in typical low-power amplifiers.