SNOSDM7 August   2025 OPA4H838-SEP

ADVANCE INFORMATION  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics: VS = ±1.25V to ±2.75V (VS = 2.5 to 5.5V)
  7. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Operating Voltage
      2. 6.3.2 Input Voltage and Zero-Crossover Functionality
      3. 6.3.3 Input Differential Voltage
      4. 6.3.4 Internal Offset Correction
      5. 6.3.5 EMI Susceptibility and Input Filtering
    4. 6.4 Device Functional Modes
  8. 7Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Bidirectional Current-Sensing
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
      2. 7.2.2 Single Operational Amplifier Bridge Amplifier
      3. 7.2.3 Precision, Low-Noise, DAC Buffer
      4. 7.2.4 Load Cell Measurement
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 TINA-TI™ Simulation Software (Free Download)
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9Mechanical, Packaging, and Orderable Information

3 Description

The OPA4H838-SEP precision amplifier is an ultra-low noise, fast-settling, zero-drift, zero-crossover device that provide rail-to-rail input and output operation. These features and excellent ac performance, combined with only 0.25µV of offset and 0.005µV/°C of drift over temperature, makes the OPA4H838-SEP a great choice for driving high-precision, analog-to-digital converters (ADCs) or buffering the output of high-resolution, digital-to-analog converters (DACs). This design results in excellent performance when driving analog-to-digital converters (ADCs) without degradation of linearity. The OPA4H838-SEP is offered in a TSSOP-14 package. The OPA4H838-SEP is specified from –55°C to +125°C.

Device Information
PART NUMBERPACKAGE(1)BODY SIZE (NOM)(2)
OPA4H838-SEPTSSOP (14)5.00mm x 4.40mm
(1) For all available packages, see the package option addendum at the end of the data sheet.
(2) The package size (length × width) is a nominal value and includes pins, where applicable
OPA4H838-SEP The OPA4H838-SEP in a Bridge Sensor Front EndThe OPA4H838-SEP in a Bridge Sensor Front End
OPA4H838-SEP Ultra-Low Offset Voltage DriftUltra-Low Offset Voltage Drift