Audio ADC buffer design secrets: Interfacing to audio ADC sampling circuits
By Steve Green, Cirrus Logic
audiodesignline.com (October 03, 2008)
There are several aspects of audio converter design that are generally not well understood but have a dramatic impact on performance, both measurable and audible. Audio converter IC manufacturers generally give circuit recommendations to address these issues but rarely discuss the reasoning behind these suggestions, how performance is affected and why it is important to follow the rules.
However, once a designer has an insight into the issues, it is possible to identify the compromises that often exist in the manufacturers recommendations. This can lead to intelligent insights to lower cost, or in some instances, improve performance.
One of these areas is interfacing to the sampling networks of analog-to-digital-converters. Today's high-performance A/D converters are based on highly oversampled multi-bit delta-sigma conversion with sampling circuits that operate at frequencies several orders of magnitude beyond the audio range. An understanding of how to properly interface to these networks is probably the least understood topic in A/D systems design and remains one of the "magical" areas of audio circuit design.
audiodesignline.com (October 03, 2008)
There are several aspects of audio converter design that are generally not well understood but have a dramatic impact on performance, both measurable and audible. Audio converter IC manufacturers generally give circuit recommendations to address these issues but rarely discuss the reasoning behind these suggestions, how performance is affected and why it is important to follow the rules.
However, once a designer has an insight into the issues, it is possible to identify the compromises that often exist in the manufacturers recommendations. This can lead to intelligent insights to lower cost, or in some instances, improve performance.
One of these areas is interfacing to the sampling networks of analog-to-digital-converters. Today's high-performance A/D converters are based on highly oversampled multi-bit delta-sigma conversion with sampling circuits that operate at frequencies several orders of magnitude beyond the audio range. An understanding of how to properly interface to these networks is probably the least understood topic in A/D systems design and remains one of the "magical" areas of audio circuit design.
To read the full article, click here
Related Semiconductor IP
- nQrux® Root of Trust IP
- AXI to UCIe Bridge IP
- UCIe 2.x Controller IP
- SWI3S (SoundWire I3S Interface) Peripheral Controller Core IP
- OpenTitan-based RISC-V Secure Element
Related Articles
- Reconfiguring Design -> FPGAs speed audio application development
- Consumer IC Advances -> Meeting MPEG-4 advanced audio coding requirements
- Consumer IC Advances -> Christmas list: tricks to enhance audio, video
- MPEG Standards -> Streaming audio needs interoperability
Latest Articles
- A Secure dToF LiDAR SoC with Dual-Domain Fingerprinting and Event-Driven AFE Circuit Achieving Sensor-Level Attack Resilience
- ZTA-Q: an Open-source RISC-V Platform for Accurate Quantized CNN Inference
- Automated Pre-Silicon Verification of High-Speed DDR5 and LPDDR5/6 Memory Controllers: Closed-Loop Timing, Mode Register, and PHY Synchronization in UVM
- U-Sonic: An Open-Source 8-Channel Ultrasound Transmit IP in a 130 nm RISC-V SoC
- S-ALSA: Co-Design of Adiabatic Logic-based Sensing and Balanced Bit-Cells for Secure and Energy-Efficient MRAM