Session21_Sensor Interfaces.pdf

1、ISSCC 2026SESSION 21Sensor Interfaces21.1:Sub-1mV-Accuracy,24-CH Synchronous Battery Monitoring IC with Bipolar-Sampling ADCs and Calibration Engines 2026 IEEE International Solid-State Circuits Conference1 of 44Sub-1mV Accuracy,24-CH SynchronousBattery Monitoring IC with Bipolar-Sampling ADCs and C

2、alibration EnginesJ.Han1,2,S.Woo2,K.-S.Oh2,D.Kim2,Y.Ko2,W.-J.Choi1,2,K.Park2,J.Choi2,J.Lee2,J.-Y.Jeon2,Y.-S.Son2,S.-G.Lee1,and K.Kwon11Korea Advanced Institute of Science and Technology,Daejeon,Korea2Autosilicon,Daejeon,Korea21.1:Sub-1mV-Accuracy,24-CH Synchronous Battery Monitoring IC with Bipolar-

3、Sampling ADCs and Calibration Engines 2026 IEEE International Solid-State Circuits Conference2 of 44Battery Monitoring IC(BMIC)Battery packs of EVs are composed of battery modules and cells.BMICs perform multi-cell-level voltage,temperature measurement,balancing,and diagnostics21.1:Sub-1mV-Accuracy,

4、24-CH Synchronous Battery Monitoring IC with Bipolar-Sampling ADCs and Calibration Engines 2026 IEEE International Solid-State Circuits Conference3 of 44Requirements for Cell Voltage MeasurementLFP cells exhibit 1mV/%SOC variation due to a flat OCV profile.Sub-1mV measurement accuracy maintained und

5、er:High common-mode voltage(VCM)from cell stack(VTOP=n VCELL)High switching noise from inverter and motorLFP(LiFePO4)Battery Open Circuit Voltage(OCV)Profile 1Battery ModuleCell1Cell2Celln0V(n-1)VCELL(n)VCELL=VTOPVCELL Switching NoiseHV DC LinkTractionInvertern-CH BMICMotorSafe Margin1mV/%High VCMGN

6、DModuleModule21.1:Sub-1mV-Accuracy,24-CH Synchronous Battery Monitoring IC with Bipolar-Sampling ADCs and Calibration Engines 2026 IEEE International Solid-State Circuits Conference4 of 44Requirements for Cell Voltage MeasurementSub-1mV measurement accuracy required across:Automotive standard(1)AEC-