OPA365AIDR

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.

Key Features

• 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