OPA2391YBJR

The OPA391, OPA2391, and OPA4391 (OPAx391) devices combine the unique characteristics of high bandwidth (1MHz) and ultra-low quiescent current (24µA) in a precision amplifier. Combined with rail-to-rail input and output, these features make the devices ideal for high-gain, low-power applications. Ultra-low input bias current of 10fA, maximum offset voltage of only 45µV, and temperature drift of 1.2µV/°C help maintain high accuracy in ratiometric and amperometric sensor front ends with stringent low-power requirements. The OPAx391 employs TI's proprietary e-trim™ op amp technology to achieve a unique combination of ultra-low offset and low input offset drift without any input chopping or auto-zero techniques. The CMOS-based technology platform also features a modern, robust output stage design capable of driving high output capacitance, alleviating the stability issues common in typical low-power amplifiers.

Applications

• Portable electronic devices
• Flow transmitters
• Blood glucose monitors
• Process analysis (pH, gas, force, humidity)
• Temperature transmitters
• Pressure transmitters
• Medical sensor patches
• Building automation
• Wearable fitness and activity monitors
• Gas detectors
• Analog security cameras

Key features

• Low quiescent current: 24µA
• Gain bandwidth product: 1MHz
• Low input bias current: 10fA
• Low offset voltage: ±45µV (maximum)
• Low drift: ±1.2µV/°C
• Wide supply voltage range: 1.7V to 5.5V
• Input common-mode range exceeds supply rails by ±100mV
• Fast slew rate: 1V/µs
• High capacitive load drive capability
• High output current drive capability: 60mA
• Rail-to-rail output
• EMI and RFI filtered inputs
• Small package options: SC-70, DSBGA