Packaging information
| Package | Pins SOT-SC70 (DCK) | 5 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the OPA391
- Low IQ: 24µA
- Gain bandwidth product: 1MHz
- Low input bias current: 10fA
- Low offset voltage: ±45µV (maximum)
- Low drift: ±1.2µV/°C
- Low supply voltage operation: 1.7V to 5.5V
- Input common mode range ±100mV beyond rail
- Fast slew rate: 1V/µs
- High load capacitance drive
- High output current drive: 60mA
- Rail-to-rail output
- EMI and RFI filtered inputs
- Small package options: SC-70, DSBGA
Description for the OPA391
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.