The standard ACAS precision is offered with tolerance matching and TCR tracking down to ±0.05% and ±5 ppm/°C respectively, with accuracy grade U. The ACAS professional series version is offered with less precise tolerance and TCR options for circuits where absolute tolerance ±0.5% or ±1% and absolute TCR ±50 ppm/°C or ±25 ppm/°C is suitable, without tolerance matching or TCR tracking.