SBOSA28 august   2023 LOG200

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  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
    5. 6.5 Electrical Characteristics
    6. 6.6 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 High Speed, Logarithmic Current-to-Voltage Conversion
      2. 7.3.2 Voltage and Current References
      3. 7.3.3 Adaptive Photodiode Bias
      4. 7.3.4 Auxiliary Operational Amplifier
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Logarithmic Transfer Function
        1. 8.1.1.1 Logarithmic Conformity Error
    2. 8.2 Typical Application
      1. 8.2.1 Optical Current Sensing
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
    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 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

GUID-20230809-CA0I-9HJW-TGXX-GFWQ79SPFM2D-low.svg Figure 5-1 RGT Package, 16-Pin VQFN (Top View)
Pin Functions
PINTYPEDESCRIPTION
NAMENO.
+IN 14 Input Auxiliary op-amp voltage non-inverting input
–IN 13 Input Auxiliary op-amp voltage inverting input
I11InputCurrent input for logarithm numerator
I23InputCurrent input for logarithm denominator
IBIAS 15 Output Photodiode adaptive biasing current output
IREF 4 Output Reference current output
REFA 10 Input Logarithmic difference amplifier reference input
OUTA 11 Output Logarithmic difference amplifier output
OUTB 12 Output Auxiliary op-amp voltage output
REF165 9 Output 1.65-V voltage reference output
REF25 5 Output 2.5-V voltage reference output
REFGND 6 Power Voltage reference negative potential
VCM 2 Input Input common-mode voltage
VCM2 16 Input Input common-mode voltage. Connect to VCM.
VS+ 8 Power Positive supply voltage
VS– 7 Power Negative supply voltage
Thermal Pad PAD — Thermal Pad. Connect to VCM to minimize leakage on I1 pin.