7.2 Formula to Calculate Response Time

The formula in Table 7-1 is used to calculate response time:

(CFG0 = A/C/D):(2 x Measurement period) + (1 x Measurement time x Total number of sensors enabled) + (3 x Measurement time x Total number of sensors touched)
Free-running measurements (CFG0 = B):(3 x Measurement time x Total number of sensors enabled) + (3 x Measurement time x Total number of sensors touched)
For oversampling, measurement time is provided in Table 7-2. Due to frequency hopping, measurement time varies based on noise level. The data captured in this table show the maximum measurement time.
Number of Samples (CFG1)Measurement Time
80.7 ms
161.4 ms
322.8 ms
645.6 ms

Example calculation #1:

  • Oversample: 8
  • Measurement Period: 50 ms
  • Number of sensors enabled: 6
  • Number of sensors touched: 2
  • Response Time = 2 * 50 + 1 * 0.8 * 6 + 3 * 0.8 * 2 = 110 ms

Example calculation #2:

  • Oversample: 32
  • Measurement Period: 50 ms
  • Number of sensors enabled: 4
  • Number of sensors touched: 2
  • Response Time = 2 * 50 + 1 * 2.9 * 4 + 3 * 2.9 * 2 = 129 ms