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Precision op amps (Vos<1mV)

OPA2145

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Dual, 5.5-MHz, high slew rate, low-noise, low-power, RRO precision JFET operational amplifier

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Data sheet

OPA2145

ACTIVE
Data sheet Order now

Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.15 GBW (typ) (MHz) 5.5 Slew rate (typ) (V/µs) 20 Rail-to-rail Out Offset drift (typ) (µV/°C) 0.4 Iq per channel (typ) (mA) 0.445 Vn at 1 kHz (typ) (nV√Hz) 7 CMRR (typ) (dB) 140 Rating Catalog Operating temperature range (°C) -40 to 125 Input bias current (max) (pA) 10 Iout (typ) (A) 0.02 Architecture FET Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -3.5 Output swing headroom (to negative supply) (typ) (V) 0.1 Output swing headroom (to positive supply) (typ) (V) -0.1 THD + N at 1 kHz (typ) (%) 0.0001
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.15 GBW (typ) (MHz) 5.5 Slew rate (typ) (V/µs) 20 Rail-to-rail Out Offset drift (typ) (µV/°C) 0.4 Iq per channel (typ) (mA) 0.445 Vn at 1 kHz (typ) (nV√Hz) 7 CMRR (typ) (dB) 140 Rating Catalog Operating temperature range (°C) -40 to 125 Input bias current (max) (pA) 10 Iout (typ) (A) 0.02 Architecture FET Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -3.5 Output swing headroom (to negative supply) (typ) (V) 0.1 Output swing headroom (to positive supply) (typ) (V) -0.1 THD + N at 1 kHz (typ) (%) 0.0001
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Best bandwidth and slew-rate-to-power ratio:
    • gain-bandwidth product: 5.5 MHz
    • Slew rate: 20 V/µs
    • Low supply current: 475 µA (maximum)
  • High precision:
    • Very low offset: 150 µV (maximum)
    • Very low offset drift: 1 µV/°C (maximum)
  • Low input bias current: 2 pA
  • Excellent noise performance:
    • Very low voltage noise: 7 nV/√Hz
    • Very low current noise: 0.8 fA/√ Hz
  • Input-voltage range includes V– supply
  • Single-supply operation: 4.5 V to 36 V
  • Dual-supply operation: ±2.25 V to ±18 V
  • Best bandwidth and slew-rate-to-power ratio:
    • gain-bandwidth product: 5.5 MHz
    • Slew rate: 20 V/µs
    • Low supply current: 475 µA (maximum)
  • High precision:
    • Very low offset: 150 µV (maximum)
    • Very low offset drift: 1 µV/°C (maximum)
  • Low input bias current: 2 pA
  • Excellent noise performance:
    • Very low voltage noise: 7 nV/√Hz
    • Very low current noise: 0.8 fA/√ Hz
  • Input-voltage range includes V– supply
  • Single-supply operation: 4.5 V to 36 V
  • Dual-supply operation: ±2.25 V to ±18 V

The OPA145 and OPA2145 (OPAx145) devices are part of a family of low-power JFET input amplifier that have excellent drift, low current noise, and pico-ampere input bias current. These features make the OPAx145 an excellent choice for amplifying small signals from high-impedance sensors.

The rail-to-rail output swing interfaces to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). In addition, the input range that includes V– allows designers to simplify power management and take advantage of the single-supply, low-noise JFET architecture.

The OPA145 and OPA2145 (OPAx145) devices are part of a family of low-power JFET input amplifier that have excellent drift, low current noise, and pico-ampere input bias current. These features make the OPAx145 an excellent choice for amplifying small signals from high-impedance sensors.

The rail-to-rail output swing interfaces to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). In addition, the input range that includes V– allows designers to simplify power management and take advantage of the single-supply, low-noise JFET architecture.
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* Data sheet OPAx145 High-Precision, Low-Noise, Rail-to-Rail Output, 5.5-MHz JFET Operational Amplifiers datasheet (Rev. F) PDF | HTML 31 Mar 2021
Product overview PLC Analog Input Front-End Architectures PDF | HTML 31 Jul 2022

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