Title :
A 24-bit multi-functional sensor analog front end employing low noise biasing technique with 8.2nV/?Hz input referred noise
Author :
Masahiko Maruyama;Shigenari Taguchi;Masafumi Yamanoue;Kunihiko Iizuka
Author_Institution :
Electronic Components and Devices Division, SHARP Corporation, Tenri, Nara, Japan
Abstract :
An Analog Front End (AFE) for a multi-functional environmental sensor is proposed. The IC consists of a 8.2nV/VHz input referred noise, 0.22mm area instrumentation amplifier, a 25aC/√Hz, 0.12mm2 charge amplifier, and a 24bit continuous-time delta-sigma ADC, which are designed with a weak inversion biasing technique. The AFE has been fabricated in a 0.18μm CMOS process with 4.5mm2 die area. The current consumption at 2.56kHz output data rate is 2.5mA, reducing to 2μA at 0.01Hz.
Keywords :
"CMOS integrated circuits","Instruments","Pressure sensors","Humidity","CMOS technology","Noise measurement","Solid state circuits"
Conference_Titel :
Solid-State Circuits Conference (A-SSCC), 2015 IEEE Asian
DOI :
10.1109/ASSCC.2015.7387485
