Title :
A 14-bit delta-sigma ADC with 8× OSR and 4-MHz conversion bandwidth in a 0.18-μm CMOS process
Author :
Jiang, Ruoxin ; Fiez, Terri S.
Author_Institution :
Maxim Integrated Products, Hillsboro, OR, USA
Abstract :
A 14-bit 8× oversampling delta-sigma (ΔΣ) analog-to-digital converter (ADC) for wide-band communication applications has been developed. By using a novel architecture, a high maximum out-of-band quantization noise gain (Qmax) is realized, which greatly improves the SNR and tonal behavior. The ADC employs a fifth-order single-stage structure with a 4-bit quantizer. It achieves 82-dB SNDR and 103-dB SFDR at 4-MHz conversion bandwidth with a single 1.8-V power supply.
Keywords :
CMOS integrated circuits; VHF circuits; analogue-digital conversion; delta-sigma modulation; integrated circuit noise; modulators; 1.8 V; 14 bit; 14-bit delta-sigma ADC; 4 MHz; 4 bit; 4-bit quantizer; CMOS process; OSR; SFDR; SNDR; analog-to-digital converter; conversion bandwidth; fifth-order single-stage structure; out-of-band quantization noise gain; oversampling delta-sigma; power supply; wide-band communication applications; Amplitude modulation; Bandwidth; Baseband; CMOS process; Frequency; Noise level; Noise shaping; Quantization; Signal to noise ratio; Transfer functions;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.820877
