sx8650 Semtech Corporation, sx8650 Datasheet - Page 48

• Manufacturer Part Number: sx8650
• Description: World?s Lowest Power & Smallest Footprint 4-wire Resistive Touchscreen Controller With 15kv Esd
• Manufacturer: Semtech Corporation

The Sample Rate (SR) and Equivalent Sample Rate (ESR) which give the number of sample per second (X, Y, Z1, Z2) is
given below
Table 14 gives some examples of Coordinate Rate and Sample Rate for various setting in PENTRIG mode.
ACS Revision V2.15/October 2009
©2009 Semtech Corp.
Nch
[1..5]
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
ADVANCED COMMUNICATIONS & SENSING
Nfilt
[1 3 5 7]
1.0
1.0
1.0
1.0
1.0
3.0
3.0
5.0
5.0
7.0
7.0
1.0
1.0
1.0
3.0
3.0
5.0
5.0
7.0
7.0
PowDly
[uS]
0.5
2.2
8.9
35.5
280.0
2.2
35.5
2.2
35.5
2.2
35.5
0.5
2.2
35.5
2.2
35.5
2.2
35.5
2.2
35.5
SetDly
[uS]
Table 14. Coordinate throughput examples
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
ESR kSPS
ECR kCPS
Tconv
SR kSPS
[uS]
121.7
619.4
103.9
170.6
152.8
219.4
377.2
510.6
217.2
181.7
315.0
279.4
412.8
377.2
510.6
51.7
55.0
68.3
77.2
83.9
World’s Lowest Power & Smallest Footprint 4-wire
Resistive Touchscreen Controller with 15kV ESD
Page 47
Tcomm
=
[uS]
181.2
181.2
181.2
181.2
181.2
181.2
181.2
181.2
181.2
181.2
181.2
N
=
=
91.2
91.2
91.2
91.2
91.2
91.2
91.2
91.2
91.2
chan
N
N
filt
chan
N
Total
[uS]
CR
filt
142.9
146.2
159.5
212.9
710.6
195.1
261.8
244.0
310.6
558.4
691.8
258.4
265.1
398.4
362.9
496.2
460.6
594.0
558.4
691.8
CR
CR
[kCPS]
7.0
6.8
6.3
4.7
1.4
5.1
3.8
4.1
3.2
1.8
1.4
3.9
3.8
2.5
2.8
2.0
2.2
1.7
1.8
1.4
CR
[kCPS]
ECR
14.0
13.7
12.5
10.3
15.5
15.1
10.0
11.0
9.4
2.8
7.6
8.2
6.4
7.2
5.8
8.1
8.7
6.7
7.2
5.8
www.semtech.com
[kSPS]
DATASHEET
15.4
11.5
20.5
16.1
12.5
10.1
10.9
12.5
10.1
7.0
6.8
6.3
4.7
1.4
3.9
3.8
2.5
8.3
6.0
8.4
SR
SX8650
[kSPS]
14.0
13.7
12.5
30.8
22.9
41.0
32.2
50.1
40.5
15.5
15.1
10.0
33.1
24.2
43.4
33.7
50.1
40.5
ESR
9.4
2.8