Achieving low noise and high efficiency for noise-sensitive analog loads
In this section, we will discuss what types of signal chain loads can be driven directly by a switching regulator to get low noise and EMI.
Noise and EMI can be detrimental to sensitive analog signal chain circuitry. For this reason, many engineers automatically default to linear regulators. But, in doing so, they are essentially trading one problem (noise) for another (heat dissipation). In this section, we will discuss what types of signal chain loads can be driven directly by a switching regulator to get low noise and EMI without sacrificing efficiency. We will also discuss when a linear regulator is absolutely needed to reach levels of noise not possible with a switcher.
Resources:
- Article: Designing a modern power supply for RF sampling converters
- White paper: Low-EMI buck converter powers a multivariable sensor transmitter with BLE connectivity
- TI Design: Less Than 1-W, Quad-Channel, Analog Output Module With Adaptive Power Management Reference Design
- White paper: Power supply architecture comparison for a 12-bit analog to digital converter
- Blog: Using a DC/DC converter to power an ADC
- Blog: Low-noise charge pumps make it easy to create negative voltages
- Blog: Powering up the performance of sensitive test and measurement systems
- TI Design: Efficient, LDO-free Power Supply for a 12-bit 500-MSPS ADC Reference Design
- TI Design: Efficient, LDO-Less, Power-Supply Network Reference Design for RF-Sampling ADC
- TI Design: Low-Voltage, Low-Noise Power-Supply Reference Design for Ultrasound Front End
