A CMOS Analog Front-End for Hall Sensor Readout IC
- Resource Type
- Conference
- Authors
- Cho, Kang-Il; Boo, Jun-Ho; Lim, Jae-Geun; Ahn, Gil-Cho
- Source
- 2024 International Conference on Electronics, Information, and Communication (ICEIC) Electronics, Information, and Communication (ICEIC), 2024 International Conference on. :1-3 Jan, 2024
- Subject
- Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Integrated circuits
Power supplies
Magnetic sensors
Simulation
Instruments
Voltage
CMOS process
Hall sensor
analog front-end (AFE)
instrumentation amplifier (IA)
analog-to-digital converter (ADC)
incremental
- Language
- ISSN
- 2767-7699
This paper presents a CMOS analog front-end (AFE) for hall sensor readout IC. A three- operational amplifier-based instrumentation amplifier (IA) is employed for low noise amplification with high common mode rejection ratio. To address the input offset of the hall magnetic sensor, an internal offset cancellation circuit using a R-2R DAC is adopted. A 2 nd order incremental ADC is used to convert the amplified analog input into 16-bit digital output. The proposed AFE is implemented in an 80nm CMOS process. It achieves a 6.8nV 2 of the output noise power at a voltage gain of 40V/V and consumes 16.8mW from a 2.8V power supply.