SBOSAA1H April   2022  – November 2024 OPA2310 , OPA310 , OPA4310

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information for Single Channel
    5. 6.5 Thermal Information for Dual Channel
    6. 6.6 Thermal Information for Quad Channel
    7. 6.7 Electrical Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Operating Voltage
      2. 7.3.2  Rail-to-Rail Input
      3. 7.3.3  Rail-to-Rail Output
      4. 7.3.4  Capacitive Load and Stability
      5. 7.3.5  Overload Recovery
      6. 7.3.6  EMI Rejection
      7. 7.3.7  ESD and Electrical Overstress
      8. 7.3.8  Input ESD Protection
      9. 7.3.9  Shutdown Function
      10. 7.3.10 Packages with an Exposed Thermal Pad
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 OPAx310 Low-Side, Current Sensing Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4.     Trademarks
    5. 9.4 Electrostatic Discharge Caution
    6. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.1 Overview

The OPAx310 family of op amps includes single (OPA310), dual (OPA2310), and quad-channel (OPA4310), ultra-low-voltage (1.5V to 5.5V), high output current operational amplifiers (op amps) with rail-to-rail input and output swing capabilities. The OPAx310 also features a very fast shutdown response and has an enable time specification of just 0.9µs typical. This feature allows for power savings when the application involves duty cycling the amplifier signal chain. OPAx310 has robust ESD performance with fail safe input ESD structure where there are no diodes connected from inputs to the positive power supply rail.

OPAx310 is offered in power pad, standard, small size packages and has an internal current limit, thermal shutdown protection that enables additional robustness when operating with high output current. OPAx310 can swing very close to the rails and has a short circuit current of ±75mA minimum across temperature at 5.5V power supply while consuming just 165μA of quiescent current. This combination of low voltage, low IQ, and high output current capability makes this device quite unique and an excellent choice for a wide range of general-purpose and high current applications. Additional output current capability can be easily achieved by connecting multiple op amps in parallel. These devices are excellent choice for LED driver, LCD driver, Laser driver, TEC driver applications and can also be used as a reference buffer, guard amplifier or as a discrete LDO.

The input common-mode voltage range includes both rails, and allows the OPAx310 series to be used in many single-supply or dual supply configurations. Rail-to-rail input and output swing significantly increases dynamic range, especially in low-supply applications, and makes these devices an excellent choice for driving low speed sampling analog-to-digital converters (ADCs). Further, the class AB output stage is capable of driving smaller resistive loads connected to any point between V+ and ground.

The OPAx310 can drive up to 75pF with a typical phase margin of 40° and features 3MHz gain bandwidth product, 3V/μs slew rate with 4μVp-p integrated noise (0.1Hz to 10Hz) while consuming only 165μA supply current per channel, thus providing a good AC performance at a very low power consumption. DC applications are also well served with a low input bias current (1pA typical), a good input offset voltage (0.25mV typical) and a good PSRR (10μV/V typical), CMRR (80dB typical), and AOL (125dB typical).

The robust design of the OPAx310 family simplifies circuit design. These op amps feature an integrated radio frequency immunity (RFI) and electro-magnetic interference (EMI) rejection filter, unity-gain stability, and no-phase reversal in input overdrive conditions.