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AN2846 Datasheet(PDF) 22 Page - STMicroelectronics

Part # AN2846
Description  The serial current limited termination device
PDF  35 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2846 Datasheet(HTML) 22 Page - STMicroelectronics

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Application circuit
AN2846
22/35
Doc ID 15130 Rev 1
3
Application circuit
3.1
Basic SCLT3-8 board description
The basic electrical schematic diagram using a single SCLT3-8 fulfills the requirements
defined in the IEC 6131-2 standard. It is easy to duplicate this configuration to meet more
complex applications using many inputs and several SCLT3-8s.
The major settings are:
●
Type 3 configuration
●
16-bit frame (SPM grounded)
●
16 µs digital input filtering (ROSC = 51 kΩ, DVR grounded)
Figure 31.
Type 3 application diagram
15k
2.2k
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
LED2
LED1
LED5
LED6
LED7
LED8
LED4
R
REF
LED3
DVR
OSC
SPM
COMP
VC
VCS
COMP
COMP
COMP
COMS
VDD
/CS
SCK
MOSI
/MISO
MISO
51k
1.0k
1.5M
120k
33n
33n
SCLT3-8
470p
470p
220
220
J1
J2
2.2k
2.2k
2.2k
2.2k
2.2k
2.2k
2.2k
22n
22n
22n
22n
22n
22n
22n
10n
10n



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