TIDUF61 May   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 TLV9002-Q1
      2. 2.2.2 TLV9034-Q1
      3. 2.2.3 TPS7B69-Q1
      4. 2.2.4 SN74HCS08-Q1
      5. 2.2.5 SN74HCS86-Q1
    3. 2.3 System Design Theory
      1. 2.3.1 TIDA-0020069 Operation
        1. 2.3.1.1 Constant Current Source
          1. 2.3.1.1.1 Design Goals
          2. 2.3.1.1.2 Design Description
          3. 2.3.1.1.3 Design Notes
          4. 2.3.1.1.4 Design Steps
        2. 2.3.1.2 Current Sensing
          1. 2.3.1.2.1 Design Goals
          2. 2.3.1.2.2 Design Description
          3. 2.3.1.2.3 Design Steps
        3. 2.3.1.3 Load Connections and Clamps
        4. 2.3.1.4 Modified Window Comparator
        5. 2.3.1.5 Digital Logic Gates
      2. 2.3.2 Status Indication
        1. 2.3.2.1 Normal Operation (Closed Connection) State
        2. 2.3.2.2 Open Connection State
        3. 2.3.2.3 Short-to-Battery State
        4. 2.3.2.4 Short-to-Ground State
  9. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Normal Operation (Closed Connection) Test Results
      2. 3.3.2 Open Connection Test Results
      3. 3.3.3 Short-to-Battery Test Results
      4. 3.3.4 Short-to-Ground Test Results
      5. 3.3.5 Disable (Shutdown) Test Results
  10. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  11. 5Tools and Software
  12. 6Documentation Support
  13. 7Support Resources
  14. 8Trademarks
  15. 9About the Author

2.2.2 TLV9034-Q1

The TLV903x-Q1 are a family of automotive grade dual- and quad-channel comparators. The family offers low input offset voltage, fault-tolerant inputs and a excellent speed-to-power combination with a propagation delay of 100ns with a quiescent supply current of only 18μA per channel.

The family also includes a Power-on Reset (POR) feature that makes sure the output is in a known state until the minimum supply voltage is reached to prevent output transients during system power-up and power-down. These comparators also feature fault-tolerant inputs that can go up to 6V without damage with no output phase inversion. This makes this family of comparators designed for precision voltage monitoring in harsh, noisy environments.

The TLV903x-Q1 have a push-pull output stage capable of sinking and sourcing many milliamps of current to drive LEDs or a capacitive load such as a MOSFET gate. The family is specified for the automotive temperature range of –40°C to 125°C and are available in a standard leaded and leadless packages.

TIDA-020069 TLV9034-Q1 Block Diagram Figure 2-3 TLV9034-Q1 Block Diagram

Key features of the TLV9034-Q1 include:

  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C6
  • 1.65V to 5.5V supply range
  • Power-On Reset (POR) for known start-up
  • Precision input offset voltage 300V
  • 100ns typical propagation delay
  • Low quiescent current 16 per channel
  • Rail-to-Rail input voltage range exceeds the rails
  • Open-drain output option (TLV902x-Q1)
  • Push-pull output option (TLV903x-Q1)
  • Alternate single pinout option (TLV90x0)
  • 2V ESD protection