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High-speed op amps (GBW ≥ 50 MHz)

OPA365

ACTIVE

2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier

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Data sheet

OPA365

ACTIVE
Data sheet Order now

Product details

Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 GBW (typ) (MHz) 50 BW at Acl (MHz) 50 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 25 Vn at flatband (typ) (nV√Hz) 4.5 Vn at 1 kHz (typ) (nV√Hz) 4.5 Iq per channel (typ) (mA) 4.6 Vos (offset voltage at 25°C) (max) (mV) 0.2 Rail-to-rail In, Out Features Zero Crossover Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 120 Input bias current (max) (pA) 10 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 65 2nd harmonic (dBc) 81 3rd harmonic (dBc) 93 Frequency of harmonic distortion measurement (MHz) 1
Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 GBW (typ) (MHz) 50 BW at Acl (MHz) 50 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 25 Vn at flatband (typ) (nV√Hz) 4.5 Vn at 1 kHz (typ) (nV√Hz) 4.5 Iq per channel (typ) (mA) 4.6 Vos (offset voltage at 25°C) (max) (mV) 0.2 Rail-to-rail In, Out Features Zero Crossover Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 120 Input bias current (max) (pA) 10 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 65 2nd harmonic (dBc) 81 3rd harmonic (dBc) 93 Frequency of harmonic distortion measurement (MHz) 1
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Gain bandwidth: 50 MHz
  • Zerø-crossover distortion topology:
    • Excellent THD+N: 0.0004%
    • CMRR: 100 dB (minimum)
    • Rail-to-rail input and output
      • Input 100 mV beyond supply rail
  • Low noise: 4.5 nV/√ Hz at 100 kHz
  • Slew rate: 25 V/µs
  • Fast settling: 0.3 µs to 0.01%
  • Precision:
    • Low offset: 100 µV
    • Low input bias current: 0.2 pA
  • 2.2-V to 5.5-V operation
  • Gain bandwidth: 50 MHz
  • Zerø-crossover distortion topology:
    • Excellent THD+N: 0.0004%
    • CMRR: 100 dB (minimum)
    • Rail-to-rail input and output
      • Input 100 mV beyond supply rail
  • Low noise: 4.5 nV/√ Hz at 100 kHz
  • Slew rate: 25 V/µs
  • Fast settling: 0.3 µs to 0.01%
  • Precision:
    • Low offset: 100 µV
    • Low input bias current: 0.2 pA
  • 2.2-V to 5.5-V operation

The OPA365 and OPA2365 (OPAx365) zerø-crossover series, rail-to-rail, high-performance, CMOS operational amplifiers are optimized for very low voltage, single-supply applications. Rail-to-rail input or output, low-noise (4.5 nV/√ Hz), and high-speed operation (50-MHz gain bandwidth) make these devices an excellent choice for driving sampling analog-to-digital converters (ADCs). Applications include audio, signal conditioning, and sensor amplification.

Special features include an excellent common-mode rejection ratio (CMRR), no input stage crossover distortion, high input impedance, and rail-to-rail input and output swing. The input common-mode range includes both the negative and positive supplies. The output voltage swing is within 10 mV of the rails.

The OPA365 (single version) is available in the micro-size SOT23-5 (SOT-5) and SOIC-8 packages. The OPA2365 (dual version) is offered in the SOIC-8 package. All versions are specified for operation from −40°C to +125°C. Single and dual versions have identical specifications for maximum design flexibility.

The OPA365 and OPA2365 (OPAx365) zerø-crossover series, rail-to-rail, high-performance, CMOS operational amplifiers are optimized for very low voltage, single-supply applications. Rail-to-rail input or output, low-noise (4.5 nV/√ Hz), and high-speed operation (50-MHz gain bandwidth) make these devices an excellent choice for driving sampling analog-to-digital converters (ADCs). Applications include audio, signal conditioning, and sensor amplification.

Special features include an excellent common-mode rejection ratio (CMRR), no input stage crossover distortion, high input impedance, and rail-to-rail input and output swing. The input common-mode range includes both the negative and positive supplies. The output voltage swing is within 10 mV of the rails.

The OPA365 (single version) is available in the micro-size SOT23-5 (SOT-5) and SOIC-8 packages. The OPA2365 (dual version) is offered in the SOIC-8 package. All versions are specified for operation from −40°C to +125°C. Single and dual versions have identical specifications for maximum design flexibility.
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Technical documentation

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Type Title Date
* Data sheet OPAx365 50-MHz, Zerø-Crossover, Low-Distortion, High-CMRR, RRI/O, Single-Supply Operational Amplifiers datasheet (Rev. G) PDF | HTML 17 May 2023
Technical article 高頻共振轉換器設計考量，第 2 部分 PDF | HTML 15 Mar 2024
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Technical article High-frequency resonant converter design considerations, Part 2 PDF | HTML 21 Dec 2023
White paper Op Amp Input and Output Swing Limitations PDF | HTML 07 Dec 2023
Application brief Zero-crossover Amplifiers: Features and Benefits (Rev. B) PDF | HTML 08 Nov 2023
Application note AN-31 Amplifier Circuit Collection (Rev. D) 21 Oct 2020
Application brief Increase Measurement Accuracy With HS Amps for Low-Side Shunt Current Monitoring (Rev. A) 26 Aug 2019
Circuit design Inverting circuit for high-to-low voltage level translation to drive ADC 15 Jun 2019
Circuit design Driving a low-voltage single-ended SAR ADC circuit with high-voltage input 10 Jun 2019
Circuit design Antialiasing filter circuit design for single-ended ADC input using fixed cutoff (Rev. A) 07 Mar 2019
Circuit design PWM generator circuit (Rev. A) PDF | HTML 01 Feb 2019
Circuit design Circuit for differential output from a single-ended precision DAC 28 Jan 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
E-book The Best of Baker's Best – Amplifiers eBook 14 Jan 2014
Application note Low Power Input and Reference Driver Circuit for ADS8318 and ADS8319 24 Jun 2009

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