OPA2863RUNR

The OPAx863 devices are low-power, unity-gain stable, rail-to-rail input and output voltage-feedback op amps designed to operate over a supply range of 2.7 V to 12.6 V. Drawing only 700 μA per channel, the OPAx863 offers a gain-bandwidth product of 50 MHz, slew rate of 105 V/μs, and voltage noise density of 5.9 nV/√Hz. The rail-to-rail input stage operates from a 2.7 V supply, making it suitable for portable battery-powered applications. The gain-bandwidth product and noise are well-matched across the full input common-mode voltage range of the rail-to-rail input stage, enabling excellent performance over a wide input dynamic range. The OPAx863 features a power-down (PD) mode with a maximum PD quiescent current (IQ) of 1.5 μA, and turn-on/turn-off times within 6.5 μs using a 3 V supply. The OPAx863 incorporates overload power limiting to restrict the increase in IQ during output saturation, preventing excessive power dissipation in power-sensitive battery-powered systems. The output stage features short-circuit protection, making these devices suitable for harsh environments.

Applications

• Low-power SAR and ΔΣ ADC driver
• ADC reference buffer
• Low-side current sensing
• Photodiode TIA interface
• Inductive sensing
• Ultrasonic flow meter
• Multifunction printer
• MDAC output buffer
• Gain and active filter stage

Key features

• Wide bandwidth
• Unity-gain bandwidth: 110 MHz (AV = 1 V/V)
• Gain-bandwidth product: 50 MHz
• Low power
• Quiescent current: 700 μA per channel (typical)
• Power-down mode: 1.5 μA (maximum, VS = 3 V)
• Supply voltage: 2.7 V to 12.6 V
• Input voltage noise: 5.9 nV/√Hz
• Slew rate: 105 V/μs
• Rail-to-rail input and output
• HD2/HD3: –129 dBc/–138 dBc at 20 kHz (2 VPP)
• Operating temperature range: –40°C to +125°C
• Additional features
• Overload power limiting
• Output short-circuit protection
• High-precision version: OPAx863A