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Precision op amps (Vos<1mV)

OPA4391

ACTIVE

Quad, micropower, high speed-to-power ratio, low-bias-current RRIO precision operational amplifier

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Data sheet

OPA4391

ACTIVE
Data sheet Order now

Product details

Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.045 Offset drift (typ) (µV/°C) 1 Input bias current (max) (pA) 0.8 GBW (typ) (MHz) 1 Features e-Trim™ Slew rate (typ) (V/µs) 1 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.0235 Vn at 1 kHz (typ) (nV√Hz) 60 CMRR (typ) (dB) 121 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.06 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.003 Output swing headroom (to positive supply) (typ) (V) -0.003 THD + N at 1 kHz (typ) (%) 0.002
Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.045 Offset drift (typ) (µV/°C) 1 Input bias current (max) (pA) 0.8 GBW (typ) (MHz) 1 Features e-Trim™ Slew rate (typ) (V/µs) 1 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.0235 Vn at 1 kHz (typ) (nV√Hz) 60 CMRR (typ) (dB) 121 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.06 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.003 Output swing headroom (to positive supply) (typ) (V) -0.003 THD + N at 1 kHz (typ) (%) 0.002
TSSOP (PW) 14 32 mm² (5 mm × 6.4 mm)
  • 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
  • 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

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.

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.

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* Data sheet OPAx391 Precision, Ultra-Low IQ , Low Offset Voltage, e-trim™ Operational Amplifiers datasheet (Rev. E) PDF | HTML Oct 28, 2024

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