OPA814DR

The OPA814 is a unity-gain stable, voltage-feedback operational amplifier for high-speed, high-precision, and wide-dynamic-range applications. The OPA814 has a low-noise junction gate field-effect transistor (JFET) input stage that features a wide gain bandwidth of 250 MHz and a supply range from 6 V to 12.6 V. The fast slew rate of 750 V/μs allows a wide large-signal bandwidth and low distortion when used as high impedance buffer in high-speed digitizers, active probes, and other test and measurement applications. The OPA814 offers extremely low input offset voltage of ±250 μV and offset voltage drift of ±3.5 μV/°C. The combination of picoamperes of input bias current and low input voltage noise (5.3 nV/√Hz) makes the OPA814 an excellent wideband transimpedance amplifier in optical test and communication equipment, as well as medical and scientific instrumentation.

Applications

• High-speed data acquisition (DAQ)
• Active probes
• Oscilloscopes
• Optical communication modules
• Test and measurement front-ends
• Medical and chemical analyzers
• Optical time-domain reflectometry (OTDR)

Key features

• Wide bandwidth
• Gain-bandwidth product: 250 MHz
• Bandwidth (G=1 V/V): 600 MHz
• Large-signal bandwidth (2 VPP): 200 MHz
• Slew rate: 750 V/μs
• High precision
• Input offset voltage: 250 μV (maximum)
• Input offset voltage drift: 3.5 μV/°C (maximum)
• Input voltage noise: 5.3 nV/√Hz
• Input bias current: 2 pA
• Low distortion (RL = 100 Ω, V0 = 2 VPP)
• HD2, HD3 at 10 MHz: -75 dBc, -85 dBc
• Supply range: 6 V to 12.6 V
• Supply current: 16 mA
• Performance upgrade to OPA656