Download iC-RC1000 Sin/Cos Signal Safety Monitor IC - iC-Haus

iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
iC-RC1000 acts as an independent monitoring device for industrial safety controllers and drive systems in the evaluation of
sine encoders for SIL applications.
Applications
• Sine/cosine encoder monitoring for SIL applications
• Motion control
• Functional safety
The IC checks in real time that four analog signal lines have the
correct DC voltage (DC range: 30 to 80 % from VCC1 or VCC2)
and that two respective paired lines have the correct differential
1 Vpp signal amplitude (amplitude range: 200 to 300 mV).
Features
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Suitable for differential encoder signals of 1 Vpp
(250 mV amplitude per line)
Suitable for single-ended signals
(500 mV amplitude per line)
Verification of DC common mode range per signal line
Analog Lissajous figure monitoring with min/max limits
Cable fracture detection
Source decoupling and overvoltage clamping per pin by
external resistors
Single-failure-proof dual channel concept
Independent diagnostic channels and outputs:
signal OK message and signal error message
Prolonged indication time
ESD protection and input overvoltage clamping
iC-RC1000
1.2V
OK Channel
OK
sin2+cos2
PSIN
0.8V
&
VCC
Monitor
DC Check
NSIN
iC-RC1000
PCOS
1.2V
0.8V
Signal
Splitter
iC-Haus GmbH – Integrated Circuits
DC Check
GND
VCC Monitor
ERR Channel
ERR
sin2+cos2
NCOS
VCC1
≥1
VCC
Monitor
Oxana Schmalz
Am Kuemmerling 18 • D -55294 Bodenheim, Germany
Tel. +49 61 35 / 92 92-30 0 • Fax +49 61 35 / 92 92-19 2 • http://www.ichaus.com
VCC2
GND
16
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
iC-RC1000 has intrinsic safety, enabling single errors to be
securely identified through redundancy; two different diagnostic
channels monitor the input signals and independently generate
complementary messages: signal OK and signal ERROR. So that
the external controller can safely detect an interrupt, indication
times are extended to at least 4 ms.
The status outputs are push-pull drivers and allow optocouplers
to be directly connected up to the device. The diagnostic channels can be supplied by one or two separate power supplies and
mutually monitor the applied supply voltage.
Overvoltage protection up to 36 V is provided by an internal
clamping circuit and the help of external resistors of 18 kΩ at
each input.
Principle
Functions
Fehleranalyse (FMEA) Eingangspin NSIN
Pin Configuration MSOP10
No.
Name
Function
1
NSIN
Input Sine –
2
PSIN
Input Sine +
3
GND
Ground
4
PCOS
Input Cosine +
5
NCOS
Input Cosine –
6
OK
OK Indication Output
7
VCC1
+5 V Supply Voltage Chan. OK
8
GND
GND
9
VCC2
+5 V Supply Voltage Chan. ERR
10
ERR
ERROR Indication Output
NCOS
Signal Splitter
1.2V
PSIN
sin2+cos2
0.8V
Oxana Schmalz
18
pin-to-pin short-circuit detection
pin short-circuit detection (to VCC or GND)
Fehleranalyse Versorgungsspannung
VCC2
OK Chan.
VCC
Monitor
VCC1
VCC Monitor
ERR Chan.
ERR
≥1
VCC
Monitor
Fehleranalyse (FMEA) Eingangspin NSIN
iC-Haus GmbH – Integrated Circuits
6
iCRC10
C_nnn
2
3
4
5
Permissible Input Frequency
0 to 500 kHz for DC check
0 to 100 kHz for Lissajous monitoring
Lissajous Monitoring (P vs. N input)
equivalent differential
amplitude:maximum 1.2...1.4 V
minimum 0.6...0.8 V
equivalent single-ended
amplitude:maximum 2.4...2.8 V
minimum 1.2...1.6 V
DC Monitoring (each pin)
maximum 73...79 % of VCC
minimum 30...36 % of VCC
Input Pull-Down Resistor
2.5 MΩ
Overvoltage Clamping
to 36 V with external series resistors
Oxana Schmalz
Push-Pull Driving Capability
highside 4 mA, lowside 10 mA
Saturation Voltage hi
1 V max. (@ 4 mA)
Saturation Voltage lo
0.5 V max. (@ 4 mA)
Indication Time
4 ms min. (low at OK, hi at ERR)
General
OK
&
IC supply monitoring
7
Indication Outputs OK, ERR
DC Check
NSIN
PSIN
iC-Haus GmbH – Integrated Circuits
8
Key Specifications
PCOS
pin open detection
NSIN
9
1
NSIN
iC-Haus GmbH – Integrated Circuits
10
Signal Inputs
PSIN
NSIN
MSOP10 (3x3 mm)
Supply Voltage
+5 V +/- 10 %
Supply Current
typ. 1.4 mA
Supply Monitoring
VCC1, VCC2 > 4.4 V
Operational Temperature
-40 °C to +110 °C
Package
MSOP10 (3 mm x 3 mm)
VCC2
Application Example
21
VCC1
VCC2
OK Chan.
VCC1
Rv
PSIN
VCC2
PSIN
Rv
NSIN
NSIN
PSIN
PCOS
NCOS
NSIN
ERR Chan.
PCOS
PCOS
Lissajous
monitoring
OK
OK
iC-RC1000
Rv
ERR
ERR
Rv
NCOS
NCOS
GND
GND
iC-Haus GmbH – Integrated Circuits
Oxana Schmalz
GND
20
This preliminary information is not a guarantee of device characteristics and performance. All rights to technical changes reserved.
Am Kuemmerling 18 • D -55294 Bodenheim, Germany
Tel. +49 61 35 / 92 92-30 0 • Fax +49 61 35 / 92 92-19 2 • http://www.ichaus.com
Rev. 2.0