A 216 kHz 124 dB Single Die Stereo Delta Sigma Audio Analog-to-Digital Converter
A 216kHz single die stereo delta sigma ADC is designed for high precision audio applications. A single loop, fifth-order, thirty-three level delta sigma analog modulator with positive and negative feedforward path is implemented. An interpolated multilevel quantizer with unevenly weighted quantization levels replaces a conventional 5-bit flash type quantizer in this design. These new techniques suppress the signal dependent energy inside the delta sigma loop and reduce internal channel noise coupling. Integrated with an on-chip bandgap reference circuit, DEM(dynamic element matching) circuit and a linear phase, FIR decimation filter, the ADC achieves 124dB dynamic range (A-weighted), –110dB THD+N over a 20kHz bandwidth. Inter-channel isolation is 130dB. Power consumption is approximately 330mW
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.