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

2.2.1 TLV9002-Q1

The TLV900x-Q1 family includes single (TLV9001-Q1), dual (TLV9002-Q1), and quad-channel (TLV9004-Q1) low-voltage (1.8V to 5.5V) operational amplifiers (op amps) with rail-to-rail input and output swing capabilities. These op amps provide a cost-effective answer for space-constrained automotive applications such as Infotainment and lighting where low-voltage operation and high capacitive-load drive are required. The capacitive-load drive of the TLV900x-Q1 family is 500pF, and the resistive open-loop output impedance makes stabilization easier with much higher capacitive loads. These op amps are designed specifically for low-voltage operation (1.8V to 5.5V) with performance specifications similar to the TLV600x-Q1 devices.

The robust design of the TLV900x-Q1 family simplifies circuit design. The op amps feature unity-gain stability, an integrated RFI and EMI rejection filter, and no-phase reversal in overdrive conditions.

TIDA-020069 TLV9002-Q1 Block Diagram Figure 2-2 TLV9002-Q1 Block Diagram

Key features of the TLV9002-Q1 include:

  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to 125°C, TA
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C6
  • Scalable CMOS amplifier for low-cost applications
  • Rail-to-rail input and output
  • Low input offset voltage: ±0.4mV
  • Unity-gain bandwidth: 1MHz
  • Low broadband noise: 27nV/√Hz
  • Low input bias current: 5pA
  • Low quiescent current: 60µA/Ch
  • Unity-gain stable
  • Internal RFI and EMI filter
  • Operational at supply voltages as low as 1.8V
  • Easier to stabilize with higher capacitive load due to resistive open-loop output impedance
  • Functional Safety-Capable