TIDUEY7
July
2021
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Description
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Resources
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Features
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Applications
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5
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1System Description
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2System Overview
- 2.1
Block Diagram
- 2.2
Design Considerations
- 2.2.1
System Control and Processing
- 2.2.2
Analog Front End
- 2.2.3
Input Voltage Monitoring: 5 V, 20 V, 40 V, and
±5 V
- 2.2.4
Bidirectional Current Sense: ±2 A
- 2.2.5
Unipolar Current Sense: 0.25 A to 1 A
- 2.2.6
TMP461-SP: Local and Remote Temperature
Sensing
- 2.2.7
NTC Thermistor Temperature Sensing
- 2.2.8
Adjustable Voltage Source
- 2.2.9
Fixed Output Current
Source
- 2.2.10
Adjustable 4-mA Current Source
- 2.2.11
Power Tree and Power Sequencing
- 2.3
Highlighted Products
- 2.3.1
MSP430FR5969-SP
- 2.3.2
ADC128S102QML-SP
- 2.3.3
DAC121S101QML-SP
- 2.3.4
LMP7704-SP
- 2.3.5
INA901-SP
- 2.3.6
LM4050QML-SP
- 2.3.7
LM158QML-SP
- 2.3.8
LM139QML-SP
- 2.3.9
TMP461-SP
- 2.3.10
TPS7A4501-SP
- 2.3.11
TPS7H2201-SP
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3Hardware, Software, Testing Requirements,
and Test Results
- 3.1
Required Hardware and Software
- 3.1.1
Hardware
- 3.1.2
Software
- 3.2
Test Setup
- 3.2.1
Voltage Monitor Test Setup
- 3.2.2
Current Monitor Test Setup
- 3.3
Test Results
- 3.3.1
Voltage Measurement - Noise Floor
Results
- 3.3.2
Voltage Measurement - Linearity
Results
- 3.3.3
Current Measurement - Noise Floor
Results
- 3.3.4
Current Measurement - Linearity
Results
- 3.3.5
Analog Outputs
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4Design and Documentation Support
- 4.1
Design Files
- 4.1.1
Schematics
- 4.1.2
BOM
- 4.2
Documentation Support
- 4.3
Support Resources
- 4.4
Trademarks
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5About the Author
Features
- Nine analog inputs (1% accuracy)
- Voltage monitoring: 5-, 20-, and 40-V inputs
- Current sensing: 500 µA, 0.25 A–1 A, and ±2 A
- Temperature sensing: NTC thermistor and thermal diode
- Three analog outputs
- 1% Adjustable voltage source
- 5% Fixed current source
- 1% Adjustable current source
- External ADC or MCU integrated ADC options