Copyright © 2017, Texas Instruments Incorporated

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OPA207

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SBOS826A – DECEMBER 2017 – REVISED DECEMBER 2018

Product Folder Links: OPA207

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Copyright © 2017–2018, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The OPA207 precision operational amplifier replaces the industry standard OP-177. The OPA207 offers

improved noise, wider output voltage swing, has twice the bandwidth, ten times the slew rate and consumes only

half the quiescent current as the OP-177. Additional features include ultralow offset voltage and drift, low bias

current, high common-mode rejection, and high power supply rejection.

7.2 Functional Block Diagram

7.3 Feature Description

The OPA207 is unity-gain stable and free from unexpected output phase reversal, making it easy to use in a

wide range of applications. Applications with noisy or high-impedance power supplies may require decoupling

capacitors close to the device pins. In most cases 0.1-μF capacitors are adequate.

7.3.1 Operating Voltage

The OPA207 operates from ±2.25 V to ±18 V supplies with excellent performance. Key parameters are assured

over the specified temperature range, –40°C to 125°C. Most behavior remains unchanged through the full

operating voltage range (±2.25 V to ±18 V). Parameters which vary significantly with operating voltage or

temperature are shown in Typical Characteristics.

7.3.2 Input Protection

The input stage of the OPA207 is internally protected with resistors in series with diode clamps as shown in

Figure 36. The inputs can withstand ±10 V differential inputs without damage and the maximum input current

should be limited to 10 mA or less.. The protection diodes conduct current when the inputs are over-driven such

as when the opamp output is slewing. This may disturb the slewing behavior of unity-gain follower applications,

but will not damage the operational amplifier.