ICHAUS IC-RC1000_12

preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 1/10
FEATURES
APPLICATIONS
♦ Sine/cosine encoder signal monitoring for SIL applications
♦ Suitable for differential encoder signals of 1 Vpp
(250 mV amplitude per line)
♦ Suitable for single-ended signals (500 mV amplitude per line)
♦ Monitor for input frequencies from 0 to 500 kHz
♦ Verification of DC common mode range per signal line
♦ Monitoring of Lissajous curve 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 outputs:
signal OK message and signal error message
♦ Sensor monitoring
♦ Motion control
♦ Functional safety
PACKAGES
MSOP10
BLOCK DIAGRAM
iC-RC1000
1.2V
OK Channel
sin2+cos2
PSIN
0.8V
OK
&
VCC
Monitor
DC Check
NSIN
VCC1
GND
iC-RC1000
VCC Monitor
PCOS
1.2V
sin2+cos2
0.8V
NCOS
Signal
Splitter
iC-Haus GmbH – Integrated Circuits
Copyright © 2012 iC-Haus
DC Check
ERR Channel
ERR
≥1
VCC
Monitor
VCC2
GND
Oxana Schmalz
16
http://www.ichaus.com
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 2/10
DESCRIPTION
iC-RC1000 acts as an independent monitoring device for industrial safety controllers and drive systems
in the evaluation of sine encoders for SIL applications.
In this function the IC checks that four analog signal
lines have the correct DC voltage range (DC range:
30 to 80 % from VCC1 or VCC2) and that two respective paired lines have the correct differential 1 Vpp
signal amplitude in real time (amplitude range: 200
to 300 mV). Signals with twice this amplitude (400 to
600 mV) referenced to ground can also be monitored;
here, the negative input must be kept within the permissible DC range (e.g. VCC/2).
iC-RC1000 has intrinsic safety, enabling single errors to be securely identified through redundancy; independently of one another, two different diagnostic
channels monitor the input signals, outputting separate messages. The Signal OK and the Signal error statuses are complementary to one another if the
chip is functioning correctly.
Each diagnostic channel has signal comparators
for DC and square sum monitoring; the monitoring
windows have a different design depending on the
good/bad diagnosis. The square sum monitor uses
an analog multiplier and calculates the Lissajous
curve derived from the square signal by the sine and
cosine (sin(wt)2 + cos(wt)2 ).
So that the external controller can safely detect an
interrupt, the status times are extended to at least
10 ms by retriggerable monoflops. After power on iCRC1000 starts in Signal error status, setting the Signal OK status at the earliest after the monoflop period has elapsed. The status outputs are configured
as push-pull drivers so that optocouplers can be directly connected up to the device (10 mA low side,
4 mA high side).
The front end signal splitter isolates the two diagnostic channels from one another and provides protection against overvoltage with the help of external resistors (39 kΩ at each signal input). The integrated
clamp circuit then reduces the input voltage to within
the permissible range. At the same time this decouples the signal source so that a controller can
simulate an error by loading an input pin. So that
signal failures can be detected should there be a
fractured cable, for example, integrated pull-down resistors (2.5 MΩ) drag the DC potential into the error
range.
iC-RC1000 works with a supply voltage of 5 V. The
diagnostic channels can be supplied by one or two
separate power packs and mutually monitor the applied supply voltage. The device is protected against
ESD and in the given circuit is overvoltage-proof at
the front end up to 36 V.
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 3/10
PACKAGING INFORMATION
PIN CONFIGURATION
MSOP10 according to JEDEC MO-187BA
(3 mm x 3 mm, lead pitch 0.5 mm)
10
9
8
7
6
iCRC10
C_nnn
PIN FUNCTIONS
No. Name Function
1
2
3
4
5
6
7
8
9
10
NSIN
PSIN
GND
PCOS
NCOS
OK
VCC1
GND
VCC2
ERR
Inverted Sine Input
Sine Input
Ground
Cosine Input
Inverted Cosine Input
OK Indication Output
+5 V Supply Voltage Channel OK
Ground
+5 V Supply Voltage Channel ERR
ERROR Indication Output
Ground can be connected to
pin 3 or pin 8.
1
2
3
4
5
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 4/10
PACKAGE DIMENSIONS MSOP10 3x3
All dimensions given in mm.
FRONT
SIDE
0.08
4°
0.85
0.16
0.60
1.45
4.90
3
3
4.40
RECOMMENDED PCB-FOOTPRINT
TOP
0.50
0.28
0.50
0.30
dra_msop10-1_pack_1, 10:1
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 5/10
ABSOLUTE MAXIMUM RATINGS
These ratings do not imply permissible operating conditions; functional operation is not guaranteed.
Exceeding these ratings may damage the device.
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Max.
G001 V(VCC)
Voltage at VCC1, VCC2
-0.3
7
V
G002 I(VCC)
Current in VCC1, VCC2
-10
25
mA
G003 Vin()
Voltage at PSIN, NSIN, PCOS, NCOS
-0.3
7
V
G004 Iin()
Current in PSIN, NSIN, PCOS, NCOS
-10
10
mA
G005 Vout()
Voltage at ERR, OK
-0.3
7
V
G006 Iout()
Current in ERR, OK
-10
25
mA
G007 Ilu()
Pulse Current in all pins
(latch-up susceptibility)
according to Jedec Standard No. 78;
Ta = 25 °C, pulse duration to 10 ms,
VCC1 = VCC1max , VCC2 = VCC2max ,
Vlu() = (-0.5...+1.5) x Vpin()max
-100
100
mA
G008 Vd()
ESD Susceptibility at all pins
HBM 100pF discharged through 1.5 kΩ
2
kV
THERMAL DATA
Operating conditions: VCC1 = 5 V ±10 %, VCC2 = 5 V ±10 %
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
T01
Ta
Operating Ambient Temperature Range
(extended range on request)
T02
Rthja
Thermal Resistance Chip to Ambient
All voltages are referenced to ground unless otherwise stated.
All currents flowing into the device pins are positive; all currents flowing out of the device pins are negative.
Typ.
-40
Max.
110
30
°C
K/W
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 6/10
ELECTRICAL CHARACTERISTICS
Operating conditions: VCC1 = 5 V ±10 %, VCC2 = 5 V ±10 %, Tj = -40 ... 125 °C, unless otherwise stated
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Typ.
Max.
Total Device
001
Vin()
Permissible Input Voltage at
PSIN, NSIN, PCOS, NCOS
36
77
%VCC
002
Vc()hi
Clamp Voltage hi at PSIN, NSIN, Vc()hi = V() − VCC1 or VCC2, I() = 10 mA
PCOS, NCOS
0.7
2
V
003
Vc()lo
Clamp Voltage lo at all Pins
I = - 1 mA
-1.2
-0.3
V
004
fin()
Permissible Input Frequency
signal monitoring operational
0
500
kHz
005
Rpd()
Pull-down Resistor at PSIN,
NSIN, PCOS, NCOS
2.5
MΩ
Channel OK, Channel ERR
301
VCC
Permissible Supply Voltage at
VCC1, VCC2
4.5
302
I(VCC)
Supply Current in VCC1, VCC2
303
VCCon
Turn-on Threshold VCC1, VCC2 increasing voltage VCC
(power-on release)
4.1
4.4
V
304
VCCoff
Turn-off Threshold VCC1, VCC2 decreasing voltage VCC
(power-down reset)
3.9
4.2
V
305
VCChys
Hysteresis at VCC1, VCC2
VCChys = VCCon − VCCoff
100
400
mV
306
Vpp()max
Differential Voltage Threshold
Maximum-Alarm
referred to Figure 1
1.2
1.3
1.5
Vpp
307
Vpp()min
Differential Voltage Threshold
Minimum-Alarm
referred to Figure 1
0.5
0.7
0.8
Vpp
308
Vdc()max
DC-Check Maximum Voltage
Threshold
referred to Figure 2
73
76
79
%VCC
309
Vdc()min
DC-Check Minimum Voltage
Threshold
referred to Figure 2
30
33
38
%VCC
310
Vs()hi
Saturation Voltage hi at OK, ERR Vs(OK)hi = VCC1 - V(); I() = -4 mA
Vs(OK)hi = VCC1 - V(); I() = -1.6 mA
Vs(ERR)hi = VCC2 - V(); I() = -4 mA
Vs(ERR)hi = VCC2 - V(); I() = -1.6 mA
0.7
1
0.5
1
0.5
V
V
V
V
0.7
1
0.5
V
V
Tj = 27 °C, no Load
5.5
0.7
0.7
V
mA
311
Vs()lo
Saturation Voltage lo at OK, ERR I() = 10 mA
I() = 4 mA
312
Isc()hi
Short-Circuit Current hi at OK,
ERR
V(OK) = 0 V ... VCC1 - 1 V
V(ERR) = 0 V ... VCC2 - 1 V
-11
-4
mA
313
Isc()lo
Short-Circuit Current lo at OK,
ERR
V(OK) = 1 V ... VCC1
V(ERR) = 1 V ... VCC2
12
30
mA
314
td()
Minimum Duration of
Lo-Signal at OK
Hi-Signal at ERR
4
20
ms
315
Ir()
Reverse Current in OK, ERR
VCC1 = 0 or open, V(OK) = 5.5 V
VCC2 = 0 or open, V(ERR) = 5.5 V
500
400
µA
µA
316
Vr()
Back Bias Voltage at VCC1,
VCC2
VCC1 open, V(OK) = 5.5 V
VCC2 open, V(ERR) = 5.5 V
1.0
2.5
V
V
0
0
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 7/10
1 Vpp
V(PSIN) - V(NSIN)
90°
180°
V(PCOS) - V(NCOS)
φ
0°
270°
0°
90°
180°
270°
360°
Vpp()min
Vpp()max
Figure 1: Differential voltage thresholds for maximum and minimum alarm.
VCC
Vdc()max
V(PSIN)
V(PCOS)
V(NSIN)
V(NCOS)
Vdc()min
0V
Figure 2: Maximum and minimum threshold voltages for DC check.
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 8/10
APPLICATION NOTES
VCC1
VCC2
PSIN
NSIN
PCOS
NCOS
39kΩ
VCC1
VCC2
PSIN
39kΩ
NSIN
39kΩ
39kΩ
OK
OK
iC-RC1000
PCOS
ERR
ERR
NCOS
GND
GND
GND
Figure 3: Overvoltage protection up to 36 V is obtained using external 39 kΩ resistors.
VCC1
VCC2
50kΩ
VCC1
PSIN
VCC2
PSIN
NSIN
OK
OK
iC-RC1000
PCOS
PCOS
ERR
ERR
NCOS
50kΩ
GND
GND
GND
Figure 4: Single-ended application.
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 9/10
DESIGN REVIEW: Function Notes
iC-RC1000 1
No.
Function, Parameter/Code
Description and Application Notes
1
Maximum limit of up to 30 ms
Elec. Char. No. 314
Table 4: Notes on chip functions regarding iC-RC1000 chip release 1
iC-RC1000 Z1
No.
Function, Parameter/Code
Description and Application Notes
—
Table 5: Notes on chip functions regarding iC-RC1000 chip release Z1
iC-Haus expressly reserves the right to change its products and/or specifications. An info letter gives details as to any amendments and additions made to the
relevant current specifications on our internet website www.ichaus.de/infoletter; this letter is generated automatically and shall be sent to registered users by
email.
Copying – even as an excerpt – is only permitted with iC-Haus’ approval in writing and precise reference to source.
iC-Haus does not warrant the accuracy, completeness or timeliness of the specification and does not assume liability for any errors or omissions in these
materials.
The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of merchantability, fitness
for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which information refers and no
guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or areas of applications of
the product.
iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade
mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.
preliminary
iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev B1, Page 10/10
ORDERING INFORMATION
Type
Package
Order Designation
iC-RC1000
MSOP10
iC-RC1000 MSOP10
For technical support, information about prices and terms of delivery please contact:
iC-Haus GmbH
Am Kuemmerling 18
D-55294 Bodenheim
GERMANY
Tel.: +49 (61 35) 92 92-0
Fax: +49 (61 35) 92 92-192
Web: http://www.ichaus.com
E-Mail: [email protected]
Appointed local distributors: http://www.ichaus.com/sales_partners