TI

  • OPA391
OPA391

采用 e-Trim™ 技术的微功耗、高精度、高带宽 RRIO 运算放大器

参数

Number of   channels (#)

1

Total supply   voltage (Max) (+5V=5, +/-5V=10)

5.5

Total supply   voltage (Min) (+5V=5, +/-5V=10)

1.7

Vos (offset   voltage @ 25 C) (Max) (mV)

0.045

GBW (Typ) (MHz)

1

Slew rate (Typ)   (V/us)

1

Rail-to-rail

In, Out

Operating   temperature range (C)

-40 to 125

Features

e-Trim

特性

Low IQ: 24 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

Input common mode range ±100 mV beyond rail

Fast slew rate: 1 V/µs

High load capacitance drive

High output current drive: 60 mA

Rail-to-rail output

EMI/RFI filtered inputs

Small package option: SC-70

描述

The OPA391 features a unique combination of high bandwidth (1 MHz) along with very low quiescent current (24 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 have demanding low-power requirements.

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.

 

 


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