OPA391 Series

Micropower, single, high-precision low-bias-current RRIO op amp with high speed-to-power ratio

Catalog

Micropower, single, high-precision low-bias-current RRIO op amp with high speed-to-power ratio

Part	Voltage - Supply Span (Min) [Min]	Voltage - Input Offset	Supplier Device Package	Voltage - Supply Span (Max) [Max]	Current - Input Bias	Package / Case	Current - Output / Channel	Slew Rate	Number of Circuits	Gain Bandwidth Product	Amplifier Type	Operating Temperature [Min]	Operating Temperature [Max]	Current - Supply	Mounting Type	Output Type
Texas Instruments OPA391DCKR	1.7 V	15 µV	SC-70-5	5.5 V	0.01 pA	5-TSSOP SC-70-5 SOT-353	60 mA	1 V/µs	1	1 MHz	General Purpose	-40 °C	125 °C	24 µA	Surface Mount	Rail-to-Rail

Catalog

Micropower, single, high-precision low-bias-current RRIO op amp with high speed-to-power ratio

Key Features

• Low IQ: 24µAGain bandwidth product: 1MHzLow input bias current: 10fALow offset voltage: ±45µV (maximum)Low drift: ±1.2µV/°CLow supply voltage operation: 1.7V to 5.5VInput common mode range ±100mV beyond railFast slew rate: 1V/µsHigh load capacitance driveHigh output current drive: 60mARail-to-rail outputEMI and RFI filtered inputsSmall package options: SC-70, DSBGALow IQ: 24µAGain bandwidth product: 1MHzLow input bias current: 10fALow offset voltage: ±45µV (maximum)Low drift: ±1.2µV/°CLow supply voltage operation: 1.7V to 5.5VInput common mode range ±100mV beyond railFast slew rate: 1V/µsHigh load capacitance driveHigh output current drive: 60mARail-to-rail outputEMI and RFI filtered inputsSmall package options: SC-70, DSBGA

Description

The OPA391, OPA2391, and OPA4391 (OPAx391) devices feature a unique combination of high bandwidth (1MHz) along with very-low quiescent current (24µA) in high-precision amplifiers. These features combined with rail-to-rail input and output make these devices an exceptional choice in high-gain, low-power applications. Ultra-low input bias current of 10fA, only 45µV of offset (maximum), and 1.2µV/°C of drift over temperature help maintain high precision in ratiometric and amperometric sensor front ends that have demanding low-power requirements. The OPAx391 use Texas Instruments’ 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. The OPA391, OPA2391, and OPA4391 (OPAx391) devices feature a unique combination of high bandwidth (1MHz) along with very-low quiescent current (24µA) in high-precision amplifiers. These features combined with rail-to-rail input and output make these devices an exceptional choice in high-gain, low-power applications. Ultra-low input bias current of 10fA, only 45µV of offset (maximum), and 1.2µV/°C of drift over temperature help maintain high precision in ratiometric and amperometric sensor front ends that have demanding low-power requirements. The OPAx391 use Texas Instruments’ 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.