TIDUEY7 July   2021

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1  System Control and Processing
      2. 2.2.2  Analog Front End
      3. 2.2.3  Input Voltage Monitoring: 5 V, 20 V, 40 V, and ±5 V
      4. 2.2.4  Bidirectional Current Sense: ±2 A
      5. 2.2.5  Unipolar Current Sense: 0.25 A to 1 A
      6. 2.2.6  TMP461-SP: Local and Remote Temperature Sensing
      7. 2.2.7  NTC Thermistor Temperature Sensing
      8. 2.2.8  Adjustable Voltage Source
      9. 2.2.9  Fixed Output Current Source
      10. 2.2.10 Adjustable 4-mA Current Source
      11. 2.2.11 Power Tree and Power Sequencing
    3. 2.3 Highlighted Products
      1. 2.3.1  MSP430FR5969-SP
      2. 2.3.2  ADC128S102QML-SP
      3. 2.3.3  DAC121S101QML-SP
      4. 2.3.4  LMP7704-SP
      5. 2.3.5  INA901-SP
      6. 2.3.6  LM4050QML-SP
      7. 2.3.7  LM158QML-SP
      8. 2.3.8  LM139QML-SP
      9. 2.3.9  TMP461-SP
      10. 2.3.10 TPS7A4501-SP
      11. 2.3.11 TPS7H2201-SP
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
    2. 3.2 Test Setup
      1. 3.2.1 Voltage Monitor Test Setup
      2. 3.2.2 Current Monitor Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Voltage Measurement - Noise Floor Results
      2. 3.3.2 Voltage Measurement - Linearity Results
      3. 3.3.3 Current Measurement - Noise Floor Results
      4. 3.3.4 Current Measurement - Linearity Results
      5. 3.3.5 Analog Outputs
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  10. 5About the Author

2 System Overview

Table 2-1 details the system specifications.

Table 2-1 System Specification
PARAMETERFS ACCURACY
Input Power SupplyVoltage5 V or 12 VN/A
Eight Monitored Analog Inputs Voltage0 to 5 V1% + 8 LSD
0 to 20 V1% + 5 LSD
0 to 40 V1% + 1 LSD
–5 to 5 V1% + 2 LSD
Current0.25 to 1 A1% + 5 LSD
–2 to 2 A1% + 4 LSD
0 to 500 µA1%
OutputsVoltage0 to 10 V1%
Current4 mA (fixed)5%
4 mA (adjustable)1%

For more information, see the TI Space Products Selection Guide on space grade products, radiation, and ECCN qualification.

Radiation reports for all the listed TI devices in Table 2-2 are found on their TI.com product folder.

Table 2-2 Radiation Qualification
PART NUMBER TOTAL IONIZATION DOSAGE HDR
(kRAD)		 TOTAL IONIZATION DOSAGE LDR
(kRAD)		 Single Event Latch-Up Immune
(MeV-cm2/mg)
ADC128S102QML-SP 100 100 120
DAC121S101QML-SP 100 100 120
MSP430FR5969-SP 50 50 72
LMP7704-SP 100 100 85
INA901-SP 50 50 93
LM4050QML-SP

100

100

SEL Immune (Bipolar process)
LM158QML-SP 100 100 SEL Immune (Bipolar process)
LM139AQML-SP 100 100 SEL Immune (Bipolar process)
TPS7A4501-SP 100 100 86
TMP461-SP 100 100 76