7.4 Worst-Case Response Time (ms)

The worst-case response time is calculated when the sensor is touched after its measurement, as shown in Figure 7-4. The response times obtained are provided in the following tables.

When one sensor is touched:


Measurement period (ms)	Response Time
Measurement period (ms)	CFG1 x8 oversampling	CFG1 x16 oversampling	CFG1 x32 oversampling	CFG1 x64 oversampling
Free run	16	31	60	119
50	107	113	126	151
100	207	213	226	251
250	507	513	526	551

When two sensors are touched:


Measurement period (ms)	Response Time
Measurement period (ms)	CFG1 x8 oversampling	CFG1 x16 oversampling	CFG1 x32 oversampling	CFG1 x64 oversampling
Free run	18	35	69	136
50	109	118	134	168
100	209	218	234	268
250	509	518	534	568

When three sensors are touched:


Measurement period (ms)	Response Time
Measurement period (ms)	CFG1 x8 oversampling	CFG1 x16 oversampling	CFG1 x32 oversampling	CFG1 x64 oversampling
Free run	21	40	77	153
50	111	122	143	185
100	211	222	243	285
250	511	522	543	585

When four sensors are touched:


Measurement period (ms)	Response Time
Measurement period (ms)	CFG1 x8 oversampling	CFG1 x16 oversampling	CFG1 x32 oversampling	CFG1 x64 oversampling
Free run	23	44	86	170
50	114	126	152	202
100	214	226	252	302
250	514	526	552	602

When five sensors are touched:


Measurement period (ms)	Response Time
Measurement period (ms)	CFG1 x8 oversampling	CFG1 x16 oversampling	CFG1 x32 oversampling	CFG1 x64 oversampling
Free run	25	48	95	187
50	116	131	160	219
100	216	231	260	319
250	516	531	560	619

When six sensors are touched:


Measurement period (ms)	Response Time
Measurement period (ms)	CFG1 x8 oversampling	CFG1 x16 oversampling	CFG1 x32 oversampling	CFG1 x64 oversampling
Free run	27	53	103	204
50	118	135	169	236
100	218	235	269	336
250	518	535	569	636

The minimum and maximum values are calculated using the best- and worst-case response time formulas, respectively. These values are calculated for a condition when all three buttons are enabled and a single button is touched.


Worst case response time (Max)	(2x Measurement period) + (1x Measurement time x Total number of sensors enabled) + (3x Measurement time x Total number of sensors touched)
Best case response time (Min)	(1x Measurement period) + (1x Measurement time x Total number of sensors enabled) + (3x Measurement time x Total number of sensors touched)


Measurement Period	Min. / Avg. / Max. resulting response time (ms)
Measurement Period	CFG1 x8 oversampling			CFG1 x16 oversampling			CFG1 x32 oversampling			CFG1 x64 oversampling
	Min.	Avg.	Max.	Min.	Avg.	Max.	Min.	Avg.	Max.	Min.	Avg.	Max.
Free run	16			31			60			119
50	55	81	107	109	111	113	117	121	126	133	142	151
100	105	156	207	209	211	213	217	221	226	233	242	251
250	255	381	507	509	511	513	517	521	526	533	542	551

Note: Considering the measurement times of all the frequencies, the response times calculated may have a ±5 µs variation.

Figure 7-6. Response Time