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