ICM-42688-P Accelerometer Self-Test Ratio Exceeding ±14%

Hi all, I’m currently validating the accelerometer self-test results on the ICM-42688-P, and I’ve encountered an issue where the self-test response ratio falls outside the expected ±14% range after applying specific sensor configurations. Sensor Configuration ODR:200 kHz FSR:2g Accelerometer Filter:3rd-order Self-Test Validation Method: I’m following the MPU-6000 datasheet self-test approach, which uses factory-programmed OTP self-test codes to estimate the expected self-test delta. Here’s how I’m performing the calculation: 1. ST Codes (OTP values): ST_CODES = [33, 43, 148] read from bank2 registers address 3B,3C,3D[XA_ST_DATA, YA_ST_DATA, ZA_ST_DATA] 2. Factory Trim Calculation: BASE = 2620.0 factory_trim = BASE * (1.01 ** (st_code – 1)) + 0.5 3. Delta Calculation: delta = ST_on_output – ST_off_output 4. Ratio Check: ratio = (factory_trim – delta) / factory_trim The self-test is considered a pass if the Change from factory trim is within ±14% for each axis.(mention in pg no-12) Issue: After applying the above configuration and methodology, I’m seeing that all axis self-test ratios are falling outside the ±14% threshold, leading to a failure in validation. Request: Has anyone observed similar behavior with this device, particularly under high ODR (200 kHz) or specific filter configurations? Any insights into: Whether this validation method is applicable to the ICM-42688-P Potential adjustments or considerations when interpreting self-test results for this device would be greatly appreciated.