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Micro-power, high-precision, wide bandwidth RRIO op amp with e-Trim™

Inventory: 225  
Limit:  50

Quality information

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MSL rating / Peak reflow Call TI
Quality, reliability
& packaging information

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
SOT-SC70 (DCK) | 5 3,000 | LARGE T&R
-40 to 125
Package | Pins SOT-SC70 (DCK) | 5
Package qty | Carrier: 3,000 | LARGE T&R
Operating temperature range (°C) -40 to 125
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Features for the OPA391

  • Low IQ: 22 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
  • Rail-to-rail input and output
  • High load capacitance drive
  • EMI/RFI filtered inputs
  • Small package option: SC-70

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Description for the OPA391

The OPA391 features a unique combination of high bandwidth (1 MHz) along with very low quiescent current (22 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 require demanding low-power needs.

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.



Qty Price (USD)
1-99 1.859
100-249 1.536
250-999 1.103
1,000+ 0.83