1 Features

• Very low noise: 4.5nV/√Hz at 10kHz

• Fast settling time:

– OPA627: 550ns to 0.01%

– OPA637: 450ns to 0.01%

• Low VOS: 100μV maximum

• Low drift: 0.8μV/°C maximum

• Low IB: 5pA maximum

• Gain options:

– OPA627: Unity-gain stable

– OPA637: Stable in gain ≥ 5

2 Applications

• Precision instrumentation

• Fast data acquisition

• DAC output amplifier

• Optoelectronics

• Sonar, ultrasound

• High-impedance sensor amps

• High-performance audio circuitry

• Active filters

3 Description

The OPA627 and OPA637 (OPA6x7) operational

amplifiers (op amps) provide a new level of

performance in a precision FET operational amplifier.

When compared to the popular OPA111 op amp, the

OPA6x7 have lower noise, lower offset voltage, and

higher speed. The OPA6x7 are useful in a broad

range of precision and high-speed analog circuitry.

The OPA6x7 is fabricated on a high-speed,

dielectrically-isolated, complementary NPN/PNP

process. The OPA6x7 operate over a wide powersupply

voltage range of ±4.5V to ±18V. Laser-trimmed

input circuitry provides high accuracy and low-noise

performance comparable with the best bipolar-input

op amps.

High-frequency complementary transistors allow

increased circuit bandwidth, attaining dynamic

performance not possible with previous precision FET

op amps. The OPA627 is unity-gain stable. The

OPA637 is stable in gains ≥ 5.

State-of-the-art, precision FET transistors achieve

extremely low input bias currents without

compromising input voltage noise performance. Low

input bias current is maintained over a wide input

common-mode voltage range with unique cascode

circuitry.

The OPA6x7 are available in SOIC-8 and TO-99

packages. Industrial temperature range models are

available.