IC-DI Datasheet, PDF (12/15 Pages) IC-Haus GmbH – DUAL SENSOR INTERFACE

iC-DI
DUAL SENSOR INTERFACE
APPLICATION NOTES
Rev C2, Page 12/15
Figure 4 shows recommended protective circuitry
against reverse bias and transients on the transmis-
sion line; suggested values as follows:
CQx:
CVB:
CVBO:
22 nF
1 µF
100 nF
DQx, DVBO: High speed diodes (eg. BAS16)
DVN:
General purpose diode,
high reverse voltage
RCFI:
RQxx:
RVB:
50 Ω
5Ω
> 20 Ω
Pins GND and VN must not be externally con-
nected, otherwise with reverse bias intolerably
high current may flow!
CVH
LVH
1uF
22uH
..50mA _VH
VHL
RSET
ISET
CVCC
VCC
VCC3
CVCC3
NUVD
NOVL
PRG1
IN1
POL1
PRG2
IN2
OEN
GND
VCC3
VCC VBR
Undervoltage
Overtemp.
Overload
VCC3
HS1
LS1
VCC3
HS2
LS2
VN>VBO
VBR
RVB
VBO
UB
QP1 RQP1
CVBO
QN1
Q1
RQN1
DVBO
CQ1
DQ1
QP2 RQP2
QN2
RQN2
VN
DQ2
Q2
M
DVN
CFO
=1
CFP
VBR
CFI
VN
RCFI
CFI
Figure 4: Recommended external protective circuitry for differential push-pull operation