Specification	OPA4391PWR

Amplifier Type	Standard
Current - Input Bias	0.01 pA
Current - Output / Channel	60 mA
Current - Supply	23.5 µA
Gain Bandwidth Product	1 MHz
Mounting Type	Surface Mount
Number of Circuits	4
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Type	Push-Pull, Rail-to-Rail
Package / Case	14-TSSOP
Package / Case [custom]	0.173 "
Package / Case [custom]	4.4 mm
Slew Rate	1 V/µs
Supplier Device Package	14-TSSOP
Voltage - Input Offset	60 µV
Voltage - Supply Span (Max) [Max]	5.5 V
Voltage - Supply Span (Min) [Min]	1.7 V

OPA4391 Series

Quad, micropower, high speed-to-power ratio, low-bias-current RRIO precision operational amplifier

Part	Gain Bandwidth Product	Amplifier Type	Current - Supply	Mounting Type	Current - Input Bias	Slew Rate	Output Type	Supplier Device Package	Voltage - Supply Span (Max) [Max]	Voltage - Input Offset	Operating Temperature [Min]	Operating Temperature [Max]	Number of Circuits	Package / Case [custom]	Package / Case [custom]	Package / Case	Current - Output / Channel	Voltage - Supply Span (Min) [Min]
Texas Instruments OPA4391PWR	1 MHz	Standard	23.5 µA	Surface Mount	0.01 pA	1 V/µs	Push-Pull Rail-to-Rail	14-TSSOP	5.5 V	60 µV	-40 °C	125 °C	4	0.173 "	4.4 mm	14-TSSOP	60 mA	1.7 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	3000	$ 1.56
		6000	$ 1.50
Texas Instruments	LARGE T&R	1	$ 2.35
		100	$ 2.06
		250	$ 1.44
		1000	$ 1.16

Description

General part information

OPA4391 Series

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.

Documents

Technical documentation and resources

OPAx391 Precision, Ultra-Low IQ , Low Offset Voltage, e-trim™ Operational Amplifiers datasheet (Rev. E)

Data sheet