SBVA094A
February 2025 – July 2025
TPS7A21
1
Abstract
Trademarks
1
Introduction
1.1
Oscilloscope Basics
2
Implications of Parasitics
3
Common Oscilloscope Issues
3.1
Choosing an Oscilloscope Probe
3.2
Sufficient Sampling
3.3
Visualization
3.4
Measuring Currents Using Current Probes
3.5
Bandwidth Limiting and Averaging
4
Parasitic Effects on Common Measurements
4.1
Load Transients
4.2
Power Supply Rejection Ratio
4.3
Output Noise Voltage
5
Summary
6
References
7
Revision History
6
References
Teledyne LeCroy,
Oscilloscope Basics: Sampling Rate
.
Texas Instruments,
Understanding the Load-Transient Response of LDOs
, technical article.
Texas Instruments,
Understanding the Terms and Definitions of LDO Voltage Regulators
, application note.
Texas Instruments,
LDO PSRR Measurement Simplified
, application note.
Texas Instruments,
How to Measure LDO Noise
, application note.
Bogatin, Eric. “Back to Basics: Bandwidth and Rise Time.”
Signal Integrity Journal
, Signal Integrity Journal, 29 July 2020, www.signalintegrityjournal.com/blogs/12-fundamentals/post/853-back-to-basics-bandwidth-and-rise-time.