OPA892中文资料德州仪器数据手册PDF规格书

1 Features

• Ultra-low 0.95nV/√Hz voltage noise

• High speed:

– 2GHz gain-bandwidth product

– 700V/μs slew rate

– 30ns settling time (0.1%)

• Stable at gains ≥10V/V

• Output drive, IO = 200mA (typical)

• Very low distortion:

– THD = –78dBc (f = 1MHz, RL = 150Ω)

– THD+N = –114dBc (f = 1kHz, BW = 80kHz)

• Wide range of power supplies:

– VCC = ±4.5V to ±18V

• Offset nulling pins on the OPA892

2 Applications

• Ultrasound scanner

• Source measurement unit (SMU)

• Power quality meter

• Ultrasound scanner

• Vector signal transceiver (VST)

• Professional audio mixer or control surface

• Professional microphones and wireless systems

• Professional speaker systems

• Professional audio amplifier

• Soundbar

• Turntable

• Professional video camera

• Guitar and other instrument amplifier

• Data acquisition (DAQ)

3 Description

The OPA892 and OPA2892 (OPAx892) are ultra-low

voltage noise, high-speed voltage-feedback amplifiers

that are an excellent choice for applications requiring

low voltage noise, including communication and

imaging. The single-amplifier OPA892 and the dualamplifier

OPA2892 offer very good ac performance

with a 290MHz bandwidth, a 700V/μs slew rate, and

a 30ns settling time (0.1%) for a gain of 10V/V. The

OPAx892 are stable at gains of 10 or greater and –9

or less. These amplifiers have a high drive capability

of 200mA and draw only 7.5mA of supply current

per amplifier. With a total harmonic distortion (THD)

of –68dBc at f = 1MHz, the OPAx892 are designed

for applications requiring low distortion. Because the

distortion remains low over a wide range of output

voltages, the OPAx892 is useful in large dynamicrange

applications such as imaging, sonar, and audio.