SBOSAE8B October   2023  – April 2024 OPA2323 , OPA323 , OPA4323

PRODMIX  

  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  Common-Mode Rejection Ratio (CMRR)
      5. 7.3.5  Capacitive Load and Stability
      6. 7.3.6  Overload Recovery
      7. 7.3.7  EMI Rejection
      8. 7.3.8  ESD and Electrical Overstress
      9. 7.3.9  Input ESD Protection
      10. 7.3.10 Shutdown Function
      11. 7.3.11 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 OPAx323 in 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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • DDF|8
  • DGK|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The OPAx323 family of op amps includes single (OPA323), dual (OPA2323), and quad-channel (OPA4323), low-voltage (1.7V to 5.5V), high-bandwidth (20MHz) amplifiers (op amps) with a zero-crossover input stage and a rail-to-rail output stage. The zero-crossover input stage enables OPAx323 to achieve high linearity and low distortion for input signals with rail-to-rail swing that are typical in ADC driver applications. Gain-bandwidth of 20MHz provides a fast settling response for ADC sampling speeds between 0.5MSPS to 5MSPS depending on the settling performance required. The OPAx323 is well-optimized for power savings as the device consumes just 1.6mA typical quiescent current.

The OPAx323 easily supports precision performance in high gain voltage sensing applications such as the wheatsone bridge, as it features maximum offset drift of 2μV/°C and thermal noise floor of 5.5nV/rt-Hz with a minimum of 100dB CMRR. This unique combination of higher precision (low offset, drift, noise, distortion, and CMRR) and higher gain-bandwidth (fast settling and slewing) enables use in multiple applications such as the motor rotary encoders, microphone audio pre-amplifiers and ultrasonic transducers.

The OPAx323 achieves a high slew-rate of 33V/μs allowing for fast detection of faults in motor current sensing applications. Unlike traditional amplifiers, the zero-cross over input stage allows for identical precision performance for both low and high-side sensing applications, thus making OPAx323 the best choice for current sensing in a variety of end equipments such as the solar string inverters, power delivery, grid and EV infrastructure. OPAx323S devices provide shutdown functionality for additional power savings and help disable the amplifier when idle. The family features standard and small size as well as leaded and QFN packages across all the channel variants.

Device Information
PART NUMBER(1) CHANNEL COUNT PACKAGE(4) PACKAGE SIZE(5)
OPA323 Single DBV (SOT-23, 5) (3) 2.9mm × 2.8mm
DCK (SC70, 5) 2mm × 1.25mm
DRL (SOT-5X3, 5) (3) 1.6mm × 1.6mm
OPA323S (2) Single, Shutdown DBV (SOT-23, 6) (3) 2.9mm × 2.8mm
DCK (SC70, 6) (3) 2mm × 1.25mm
OPA2323 Dual D (SOIC, 8) 4.9mm × 6mm
DDF (SOT-23, 8) 2.9mm × 2.8mm
DSG (WSON, 8) (3) 2mm × 2mm
DGK (VSSOP, 8) 3mm × 4.9mm
PW (TSSOP, 8)(3) 3mm × 6.4mm
OPA2323S (2) Dual, Shutdown RUG (X2QFN, 10) (3) 1.5mm × 2mm
OPA4323 Quad D (SOIC, 14) (3) 8.65mm × 6mm
PW (TSSOP, 14) 5mm × 6.4mm
RUC (X2QFN, 14)(3) 2mm × 2mm
DYY (SOT-23, 14) 4.2mm × 3.26mm
OPA4323S (2) Quad, Shutdown RTE (WQFN, 16) (3) 3mm × 3mm
(1) See Section 4.
(2) Part number is for preview only.
(3) Package is for preview only.
(4) For more information, see Section 11.
(5) The package size (length × width) is a nominal value and includes pins, where applicable.
GUID-20230427-SS0I-DPRW-Z5FW-VGGGQTQ1LG29-low.svg Bidirectional, High-Side Current Sense Amplifier and ADC Driver