EPC110 Datasheet, PDF (14/27 Pages) Espros Photonics corp – Fully integrated configurable light barrier driver & receiver

epc110
DEC
TPER
1
17
12...9 Weight of missing pulse counts. Refer to Pulse Modulated Operation (e.g. OUTNint to OUTN) :
Minimum number of missing pulses nM of light detection for counting the r elease time (fall time) tF.
12 11 10 9
000 0
000 1
001 0
001 1
010 0
010 1
011 0
011 1
100 0
100 1
101 0
101 1
110 0
110 1
111 0
111 1
DEC
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Min. nM
32768
16384
8192
4096
2048
1024
512
256
128
64
32
16
8
4
2
1
Setting
X (Default setting)
X (typical setting)
1
17 15...13 For fork light barrier, standalone mode: LED cycle time tCycle.
For fork light barrier, controlled mode: Select next lower value then external EN cycle time.
15 14 13
000
001
010
011
100
101
110
111
Values
5μs
10μs
30μs
100μs
300μs
1ms
10ms
100ms
Default
X
Recommended Setting
X (typical setting)
Parameter
Name
FUSEBIT
Register No.
ROM RAM
2
18
Bit No. Function
0
During write operation to this RAM register, put this bit = 0.
This bit will be set automatically, when corresponding ROM register is programmed.
0 Values
0 The corresponding ROM register is not programmed
1 The corresponding ROM register is programmed
SENSN
2
18
3...1 Lower threshold setting of the p hoto current sensitivity IPDN to trigger output OUTN.
3 2 1 Values Default Recommended Comments
0 0 0 24nA X
0 0 1 36nA
0 1 0 48nA
0 1 1 60nA
1 0 0 72nA
1 0 1 84nA
1 1 0 96nA
1 1 1 108nA
A lower value increases the sensitivity. A too sensitive setting leads to
false readings because of shot noise of the receiver photo diode and the
internal amplifier (typ. input noise level is 7nA RMS without photo diode).
Also induced EMI can lead to false readings if the sensitivity is set too
X
low. The EMI sensitivity is heavily depending on the system architecture
and the electromechanical design. The better the shielding of the chip
and the photo diode and the better the PCB layout, the better the EMI
immunity.
The tolerance of the threshold is approx. ±25%.
© 2011 ESPROS Photonics Corporation
14
Characteristics subject to change without notice
Datasheet epc110 - V2.1
www.espros.ch