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.