Data Sheet Rev. 2.41 / July 27, 2015 ZSC31150 Fast Automotive Sensor Signal Conditioner Multi-Market Sensing Platforms Precise and Deliberate ZSC31150 Fast Automotive Sensor Signal Conditioner Brief Description Benefits The ZSC31150 is a CMOS integrated circuit for highly accurate amplification and sensor-specific correction of bridge sensor signals. Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity is accomplished via an internal 16-bit RISC microcontroller running a correction algorithm, with calibration coefficients stored in an EEPROM. The ZSC31150 is adjustable to nearly all bridge sensor types. Measured values are provided at the analog voltage output or at the digital ZACwire™ and I²C™* interface. The digital interface can be used for a simple PC-controlled calibration procedure in order to program a set of calibration coefficients into an on-chip EEPROM. A specific sensor and a ZSC31150 can be mated digitally: fast, precise, and without the cost overhead associated with trimming by external devices or a laser. No external trimming components required Only a few external protection devices needed PC-controlled configuration and single pass calibration via I²C™ or ZACwire™ interface: simple, cost efficient, quick, and precise End-of-line calibration via I²C™ or ZACwire™ interface High accuracy (0.25% FSO @ -25 to 85°C; 0.5% FSO @ -40 to 125°C) Excellent EMC/ESD robustness and AEC-Q100 qualification Available Support Evaluation Kits Application Notes Mass Calibration System Features Physical Characteristics Supply voltage: 4.5 to 5.5 V Operation temperature: -40°C to 125°C (-40°C to +150°C extended temperature range) Available as DFN14 (5mm x 4mm; wettable flanks), SSOP14, and die ZSC31150 Application Circuit Out / OWI GND C2 100nF 8 VSSE VDDE 7 9 AOUT VDD 6 +4.5V to +5.5V C3 47nF Sensor Bridge 10 VBN 11 VBR_B 12 VBP C4 C5 ZSC31150 Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity Adjustable to nearly all bridge sensor types Analog gain of up to 420 Output options: ratiometric analog voltage output (5% to 95% maximum, 12.4-bit resolution) or ZACwire™ (digital one-wire-interface) Temperature compensation: internal or external diode, bridge resistance, thermistor Sensor biasing by voltage or constant current Sample rate: up to 7.8kHz High voltage protection up to 33V Supply current: max. 5.5mA Reverse polarity and short-circuit protection Wide operation temperature depending on part number: up to -40 to +150°C Traceability by user-defined EEPROM entries Safety and diagnostic functions VSUPP n.c. 5 SCL 4 SCL SDA 3 SDA Serial Interface 13 VBR_T VSSA 2 14 IRTEMP VDDA 1 C1 100nF Temperature Sensor * I²C™ is a trademark of NXP. For more information, contact ZMDI via [email protected]. © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41— July 27, 2015 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. ZSC31150 Fast Automotive Sensor Signal Conditioner ZSC31150 Block Diagram PGA MUX RAM ADC TS Analog Block ZACwire™ I2C™ EEPROM CMC DAC ROM Digital Data I/O Analog Out BAMP ZSC31150 Digital Block Ordering Information Sales Code Description Package ZSC31150GE ZSC31150 Die — Temperature range: -40°C to +150°C Unsawn on Wafer: add “B” to sales code Sawn on Wafer Frame: add “C” Waffle Pack: add “D” ZSC31150GEG2-R ZSC31150 DFN14 (5mmx4mm; wettable flanks) —Temperature range: -40°C to 150°C Tape & Reel ZSC31150GAG2-R ZSC31150 DFN14 (5mmx4mm; wettable flanks) —Temperature range: -40°C to 125°C Tape & Reel ZSC31150GEG1 ZSC31150 SSOP14—Temperature range: -40°C to +150°C ZSC31150GLG1 ZSC31150 SSOP14—Temperature range: -40°C to +150°C (Long life: 5000h @150°C) Tube: add “-T” to sales code Tape & Reel: add “-R” ZSC31150GAG1 ZSC31150 SSOP14—Temperature range: -40°C to +125°C ZSC31150KIT Evaluation Kit V1.2 ZSC31150 SSC Evaluation Kit: three interconnecting boards, five ZSC31150 SSOP14 samples, USB cable (software can be downloaded from product page at www.zmdi.com/zsc31150) ZSC31150 Mass Calibration System V1.1 Modular Mass Calibration System (MSC) for ZSC31150: MCS boards, cable, connectors (software can be downloaded from product page) Sales and Further Information www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Global Headquarters Grenzstrasse 28 01109 Dresden, Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA Central Office: Phone +49.351.8822.306 Fax +49.351.8822.337 USA Phone 1.855.275.9634 Phone +1.408.883.6310 Fax +1.408.883.6358 European Technical Support Phone +49.351.8822.7.772 Fax +49.351.8822.87.772 DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. European Sales (Stuttgart) Phone +49.711.674517.55 Fax +49.711.674517.87955 Zentrum Mikroelektronik Dresden AG, Japan Office 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Zentrum Mikroelektronik Dresden AG, Korea Office U-space 1 Building Unit B, 906-1 660, Daewangpangyo-ro Bundang-gu, Seongnam-si Gyeonggi-do, 463-400 Korea Phone +82.31.950.7679 Fax +82.504.841.3026 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41— July 27, 2015 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. ZSC31150 Fast Automotive Sensor Signal Conditioner Contents 1 2 3 4 5 Electrical Characteristics .............................................................................................................................. 6 1.1. Absolute Maximum Ratings ................................................................................................................... 6 1.2. Operating Conditions ............................................................................................................................. 6 1.3. Electrical Parameters ............................................................................................................................ 7 1.3.1. Supply Current and System Operation Conditions ......................................................................... 7 1.3.2. Analog Front-End (AFE) Characteristics ........................................................................................ 7 2) 1.3.3. Temperature Measurement .......................................................................................................... 8 1.3.4. Analog-to-Digital Conversion (ADC) ............................................................................................... 8 1.3.5. Sensor Connection Check .............................................................................................................. 8 1.3.6. Digital-to-Analog Conversion (DAC) and Analog Output (AOUT Pin) ............................................ 8 1.3.7. System Response ........................................................................................................................... 9 1.4. Interface Characteristics and EEPROM .............................................................................................. 10 TM 1) 1.4.1. I²C Interface ............................................................................................................................ 10 1.4.2. ZACwire™ One Wire Interface (OWI) ........................................................................................... 10 1.4.3. EEPROM ....................................................................................................................................... 10 Circuit Description ...................................................................................................................................... 11 2.1. Signal Flow .......................................................................................................................................... 11 2.2. Application Modes ............................................................................................................................... 12 2.3. Analog Front End (AFE) ...................................................................................................................... 13 2.3.1. Programmable Gain Amplifier (PGA) ............................................................................................ 13 2.3.2. Offset Compensation .................................................................................................................... 14 2.3.3. Measurement Cycle ...................................................................................................................... 14 2.3.4. Analog-to-Digital Converter ........................................................................................................... 15 2.4. Temperature Measurement ................................................................................................................. 17 2.5. System Control and Conditioning Calculation ..................................................................................... 17 2.5.1. Operation Modes........................................................................................................................... 17 2.5.2. Start Up Phase .............................................................................................................................. 18 2.5.3. Conditioning Calculation ............................................................................................................... 18 2.6. Analog Output AOUT ........................................................................................................................... 19 2.7. Serial Digital Interface ......................................................................................................................... 19 2.8. Failsafe Features, Watchdog and Error Detection .............................................................................. 19 2.9. High Voltage, Reverse Polarity, and Short Circuit Protection ............................................................. 20 Application Circuit Examples ...................................................................................................................... 21 Pin Configuration, Latch-Up and ESD Protection ...................................................................................... 23 4.1. Pin Configuration and Latch-up Conditions ......................................................................................... 23 4.2. ESD Protection .................................................................................................................................... 24 Package...................................................................................................................................................... 24 5.1. SSOP14 Package ................................................................................................................................ 24 5.2. DFN14 Package .................................................................................................................................. 25 Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 4 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 6 7 8 9 10 11 Quality and Reliability ................................................................................................................................. 26 Customization ............................................................................................................................................. 26 Ordering Information .................................................................................................................................. 26 Related Documents and Tools ................................................................................................................... 27 Glossary ..................................................................................................................................................... 27 Document Revision History ........................................................................................................................ 28 List of Figures Figure 2.1 Figure 2.2 Figure 3.1 Figure 3.2 Figure 3.3 Figure 5.1 Figure 5.2 Block Diagram of the ZSC31150 .................................................................................................. 11 Measurement Cycle ...................................................................................................................... 15 Bridge in Voltage Mode, External Diode Temperature Sensor .................................................... 21 Bridge in Voltage Mode, External Thermistor ............................................................................... 22 Bridge in Current Mode, Temperature Measurement via Bridge TC ............................................ 22 SSOP14 Pin Diagram ................................................................................................................... 24 Outline Drawing for DFN14 Package with Wettable Flanks ......................................................... 25 List of Tables Table 1.1 Table 1.2 Table 1.3 Table 1.4 Table 2.1 Table 2.2 Table 2.3 Table 3.1 Table 4.1 Data Sheet July 27, 2015 Absolute Maximum Ratings ............................................................................................................ 6 Operating Conditions ...................................................................................................................... 6 Electrical Parameters ...................................................................................................................... 7 Interface and EEPROM Characteristics ....................................................................................... 10 Adjustable Gains, Resulting Sensor Signal Spans, and Common Mode Ranges ....................... 13 Analog Zero Point Shift Ranges (XZC) ......................................................................................... 14 Analog Output Resolution versus Sample Rate ........................................................................... 16 Application Circuit Parameters ..................................................................................................... 21 Pin Configuration and Latch-Up Conditions ................................................................................. 23 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 5 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 1 Electrical Characteristics 1.1. Absolute Maximum Ratings The absolute maximum ratings are stress ratings only. The ZSC31150 might not function or be operable above the recommended operating conditions. Stresses exceeding the absolute maximum ratings might also damage the device. In addition, extended exposure to stresses above the recommended operating conditions might affect device reliability. ZMDI does not recommend designing to the “Absolute Maximum Ratings.” Parameters apply in operation temperature range and without time limitations. Table 1.1 Absolute Maximum Ratings No. Parameter 1.1.1. Supply voltage Symbol 1) Min Max Unit To VSSE. -33 33 VDC Relative to VSSE. -33 33 VDC VDDA Relative to VSSA. VDDE - VDDA < 0.35 V -0.3 6.5 VDC Relative to VSSA. -0.3 VDDA + 0.3 VDC -55 150 C VDDE 1) 1.1.2. Potential at the AOUT pin 1.1.3. Analog supply voltage 1.1.4. Voltage at all analog and digital IO pins VA_IO VD_IO 1.1.5. Storage temperature TSTG 1) VOUT Conditions Refer to the ZSC31150 Technical Note – High Voltage Protection for specification and detailed conditions for high voltage protection. 1) 1.2. Operating Conditions All voltages are related to VSSA. See important table notes at the end of the table. Table 1.2 Operating Conditions No. 1.2.1. Parameter Symbol Conditions Min Max Unit 1.2.1.1 TQE ambient temperature range for part 1) numbers ZSC31150xExx TAMB_TQE TQE -40 150 C 1.2.1.2 TQA ambient temperature range for part 2) numbers ZSC31150xAxx TAMB_TQA TQA -40 125 C 1.2.1.3 TQI ambient temperature range for 2) advanced performance TAMB_TQI TQI -25 85 C 5.5 VDC 25 k 10 k 1.2.2. Supply voltage VDDE 4.5 1.2.3. Bridge resistance—Bridge 2), 3) Voltage Mode RBR_V 2 1.2.4. Bridge resistance—Bridge 2), 3) Current Excitation Mode RBR_C Data Sheet July 27, 2015 Typ 5.0 See specification 1.2.6 for IBR_MAX © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 6 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner No. Parameter 1.2.5. Current reference resistor 1.2.6. Maximum bridge current 2),4) Symbol Conditions Min Typ RIBR IBR = VDDA / (16 * RIBR) 0.07 * RBR Max k IBR_MAX 1.2.7. Maximum bridge top voltage VBR_TOP 1.2.8. TC current reference 2) resistor TC RIBR Unit 2 mA 15 ( /16 * VDDA) - 0.3 Behavior influences current generated 50 V ppm/K 1) Refer to the temperature profile description in the ZSC31150 Technical Note – Die and Package Specifications for operation in temperature range > 125°C. 2) No measurement in mass production; parameter is guaranteed by design and/or quality observation. 3) Symmetric behavior and identical electrical properties (especially with regard to the low pass characteristic) of both sensor inputs of the ZSC31150 are required. Unsymmetrical conditions of the sensor and/or external components connected to the sensor input pins of ZSC31150 can generate a failure in signal operation. 4) See application circuit components in Table 3.1. 1.3. Electrical Parameters All parameter values are valid for operating conditions specified in section 1.2 except as noted. All voltages related to VSSA. See important table notes at the end of the table. Table 1.3 Electrical Parameters No. Parameter 1.3.1. Conditions Min Typ Max Unit 5.5 mA 4 MHz Supply Current and System Operation Conditions 1.3.1.1. Supply current 1.3.1.2. Clock frequency 1.3.2. Symbol IS 1) fOSC Without bridge and load current; TAMB_TQA; fCLK 3 MHz Guaranteed adjustment range (see the ZSC31150 Functional Description for details); TAMB_TQA 2 3 Analog Front-End (AFE) Characteristics 1.3.2.1. Input span 1.3.2.2. Analog offset compensation range 1.3.2.3. Parasitic differential input 1) offset current IIN_OFF Common mode input range VIN_CM 1.3.2.4. Data Sheet July 27, 2015 VIN_SP Analog gain: 420 to 2.8 1 275 mV/V Depends on gain adjust; refer to section 2.3.1 -300 300 % VIN_SP Within TAMB_TQE -10 10 nA Within TAMB_TQI -2 2 nA 0.29 * VDDA 0.65 * VDDA V Depends on gain adjustment; no XZC; see section 2.3.1 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 7 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner No. Parameter Symbol Conditions Min Typ Max Unit 1300 ppm FS / (mV/V) 20 A 0 1.5 V 2) 1.3.3. Temperature Measurement 1.3.3.1. External temperature diode channel gain aTSED 300 1.3.3.2. External temperature diode bias current ITSE 6 1.3.3.3. External temperature diode 1) input range 1.3.3.4. External temperature resistor channel gain aTSER 1200 3500 ppm FS / (mV/V) 1.3.3.5. External temperature resistor / 1) input voltage range VTSER 0 600 mV/V 1.3.3.6. Internal temperature diode sensitivity STTSI 700 2700 ppm FS / K 13 16 Bit 0.95 LSB 4 LSB 5 LSB 90 %VDDA 1.3.4. Raw values – without conditioning Analog-to-Digital Conversion (ADC) 1) 1.3.4.1. ADC resolution 1.3.4.2. ADC differential nonlinearity 1) (DNL) DNLADC 1.3.4.3. ADC integral nonlinearity 1) (INL) within TQA INLADC 1.3.4.4. ADC INL within TQE INLADC 1.3.4.5. ADC input range Range 10 100 1.3.5. rADC rADC =13-bit; fCLK=3MHz; best fit, 2nd order; complete AFE; with ADC input range specified in 1.3.4.5 Sensor Connection Check 1.3.5.1. Sensor connection loss detection threshold RSCC_min 1.3.5.2. Sensor input short check RSSC_short Short detection guaranteed 1.3.5.3. Sensor input no-short threshold RSSC_pass 1.3.6. 10 A short is not indicated above this threshold k 0 50 1000 Digital-to-Analog Conversion (DAC) and Analog Output (AOUT Pin) 1.3.6.1. DAC resolution 1.3.6.2. Output current sink and source for VDDE=5V 1.3.6.3. Short circuit current 1.3.6.4. Addressable output signal range Data Sheet July 27, 2015 rDAC Analog output, 10-90% 12 ISRC/SINK_OUT VOUT: 5-95%, RLOAD 2kΩ Bit 2.5 mA 5 mA -25 25 mA VSR_OUT95 @ RLOAD 2k 0.05 0.95 VDDE VSR_OUT90 @ RLOAD 1k 0.1 0.9 VDDE VOUT: 10-90%, RLOAD 1kΩ IOUT_max To VSSE or VDDE 3) © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 8 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner No. Parameter Symbol 1) 1.3.6.5. Output slew rate 1.3.6.6. Output resistance in diagnostic mode 1.3.6.7. Load capacitance 1.3.6.8. DNL (DAC) 1.3.6.9. INL TQA (DAC) 1.3.6.10. INL TQE (DAC) 1.3.6.11. Output leak current @150°C 1.3.7. SROUT ROUT_DIA 1) CLOAD Conditions CLOAD < 50nF Typ Max Unit 0.1 V/µs Diagnostic Range: <4|96>%, RLOAD 2k <8|92>%, RLOAD 1k 82 C3 (see section 3) 150 nF -1.5 1.5 LSB DNLOUT 1) Min INLOUT Best fit, rDAC =12-bit -5 5 LSB INLOUT Best fit, rDAC =12-bit -8 8 LSB ILEAK_OUT power or ground loss -25 25 µA 5 ms 512 µs System Response 4) 1.3.7.1. Startup time 1.3.7.2. Response time (100% jump) 1.3.7.3. Bandwidth 1.3.7.4. Analog output noise 1) peak-to-peak 1.3.7.5. Analog output noise RMS 1.3.7.6. Ratiometricity error REOUT_5 1.3.7.7. Overall failure (deviation from ideal line including the INL, gain, offset and temperature 5) errors) FALL TQI 1) st tSTA To 1 output; fCLK=3MHz; no ROM check; ADC 14-bit and 2nd order tRESP fCLK=4MHz; 13-bit, 2nd order; refer to Table 2.3 1) 256 Comparable to analog SSCs VNOISE,PP 1) 5 kHz Shorted inputs; bandwidth 10kHz 10 mV VNOISE,RMS Shorted inputs; bandwidth 10kHz 3 mV 1000 ppm Maximum error of VDDE=5V to 4.5/5.5V nd 13-bit, 2 order ADC; f 3MHz; XZC=0 FALL TQA CLK No sensor caused effects; FALL TQE value in parentheses is the digital readout. 0.25 (0.1) % FS 0.5 (0.25) % FS 1.0 (0.5) % FS 1) No measurement in mass production; parameter is guaranteed by design and/or quality observation. 2) Refer to section 2.4. 3) Minimum output voltage to VDDE or maximum output voltage to VSSE. 4) Depends on resolution and configuration - start routine begins approximately 0.8ms after power on. 5) XZC is active: additional overall failure of 25ppm/K for XZC=31 at maximum; failure decreases linearly for XZC adjustments lower than 31. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 9 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 1.4. Interface Characteristics and EEPROM Table 1.4 Interface and EEPROM Characteristics No. 1.4.1. Parameter I²C TM 2) VI2C_IN_H 2), VI2C_IN_L Input-high level 1.4.1.2 Input-low level Output-low level 2) SDA load capacitance 1.4.1.5 2) 1.4.2. Min SCL clock frequency 2) Internal pull-up resistor Max Unit 2) 0.8 VDDA VDDA 0.15 VDDA CSDA 400 pF fSCL 400 kHz 100 k 0.2 VDDA Open Drain, IOL<2mA RI2C 25 ZACwire™ One Wire Interface (OWI) 1.4.2.1 2) Input-low level 1.4.2.2 Input-high level 1.4.2.3 VOWI_IN_L 2) VOWI_IN_H 0.75 Pull-up resistance master ROWI_PUP 0.3 1.4.2.4 OWI load capacitance COWI_LOAD 1.4.2.5 Start window 1.4.3. Typ 0.2 VI2C_OUT_L 1.4.1.4 1.4.1.6 Conditions 1) Interface 1.4.1.1 1.4.1.3 Symbol 2) VDDA 3.3 Summarized OWI line load Typ: @ fCLK=3MHz 96 175 k 50 nF 455 ms 150 C EEPROM 1.4.3.1 Ambient temperature 2) EEPROM programming 1.4.3.2 Write cycles 2) TAMB_EEP nWRI_EEP 2), 3) 1.4.3.3 Read cycles 1.4.3.4 Data retention 1.4.3.5 Programming time nREAD_EEP 2), 4) 2) -40 Write temperature: <=85°C 100k Write temperature: up to 150°C 100 Read temperature: <=175°C 8 * 10 tRET_EEP 1300h at 175°C =100000h at 55°C; 27000h at 125°C; 3000h at 150°C) tWRI_EEP Per written word, fCLK=3MHz 8 15 years 12 ms 1) Refer to ZSC31150 Functional Description for timing details. 2) No measurement in mass production; parameter is guaranteed by design and/or quality observation. 3) Note that the package and temperature versions cause additional restrictions. 4) Over lifetime; use calculation sheet SSC Temperature Profile Calculation Spreadsheet for temperature stress calculation; note additional restrictions are caused by different package and temperature versions. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 10 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 2 Circuit Description Note: This data sheet provides specifications and a general overview of ZSC31150 operation. For details of operation, including configuration settings and related EEPROM registers, refer to the ZSC31150 Functional Description. 2.1. Signal Flow The ZSC31150’s signal path includes both analog (shown in blue in Figure 2.1) and digital (pink) sections. The analog path is differential; i.e., the differential bridge sensor signal is handled internally via two signal lines that are symmetrical around a common mode potential (analog ground = VDDA/2), which improves noise rejection. Consequently, it is possible to amplify positive and negative input signals, which are located within the common mode range of the signal input. Figure 2.1 Block Diagram of the ZSC31150 PGA MUX RAM ADC TS Analog Block ZACwire™ I2C™ EEPROM CMC ROM Digital Block DAC BAMP Programmable Gain Amplifier MUX Multiplexer ADC Analog-to-Digital Converter CMC Calibration Microcontroller DAC Digital-to-Analog Converter BAMP Buffer Amplifier – Output Buffer OPAMP EEPROM Non Volatile Memory for Calibration Parameters and Configuration TS On-Chip Temperature Sensor (pn-junction) ROM Memory for Correction Formula and Algorithm RAM Volatile Memory for Calibration Parameters and Configuration July 27, 2015 Analog Out ZSC31150 PGA Data Sheet Digital Data I/O © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 11 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner The differential signal from the bridge sensor is pre-amplified by the programmable gain amplifier (PGA). The multiplexer (MUX) transmits the signals from either the bridge sensor, the external diode, or the separate temperature sensor to the analog-to-digital converter (ADC) in a specific sequence (the internal pn-junction (TS) can be used instead of the external temperature diode). Next, the ADC converts these signals into digital values. The digital signal correction takes place in the calibration microcontroller (CMC). It is based on a correction formula located in the ROM and sensor-specific coefficients stored in the EEPROM during calibration. Depending on the programmed output configuration, the corrected sensor signal is output as an analog value or in a digital format (I²C™ or ZACwire™). The configuration data and the correction parameters can be programmed into the EEPROM via the digital interfaces. 2.2. Application Modes For each application, a configuration set must be established (generally prior to calibration) by programming the on-chip EEPROM regarding to the following modes: Sensor Channel Sensor mode: ratiometric bridge excitation in voltage or current supply mode. Input range: the gain adjustment of the AFE with respect to the maximum sensor signal span and the zero point of the ADC have to be chosen. An additional analog offset compensation, the Extended Zero-Point Compensation (XZC), must be enabled if required; e.g., if the sensor offset voltage is close to or larger than the sensor span. st nd Resolution/response time: The ADC must be configured for resolution and conversion settings (1 or 2 order). These settings influence the sampling rate, signal integration time, and, as a result, the noise immunity. Temperature Temperature measurement: the source for the temperature correction must be chosen. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 12 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 2.3. Analog Front End (AFE) The analog front end (AFE) consists of the programmable gain amplifier (PGA), the multiplexer (MUX), and the analog-to-digital converter (ADC). 2.3.1. Programmable Gain Amplifier (PGA) Table 2.1 shows the adjustable gains, the sensor signal spans, and the allowed common mode range. Table 2.1 No. Adjustable Gains, Resulting Sensor Signal Spans, and Common Mode Ranges Overall Gain aIN Max. Span VIN_SP 1) [mV/V] Gain Amp1 Gain Amp2 Gain Amp3 Input common mode range 2) VIN_CM as % of VDDA XZC = Off XZC = On 1 420 1.8 30 7 2 29 to 65 45 to 55 2 280 2.7 30 4.66 2 29 to 65 45 to 55 3 210 3.6 15 7 2 29 to 65 45 to 55 4 140 5.4 15 4.66 2 29 to 65 45 to 55 5 105 7.1 7.5 7 2 29 to 65 45 to 55 6 70 10.7 7.5 4.66 2 29 to 65 45 to 55 7 52.5 14.3 3.75 7 2 29 to 65 45 to 55 8 35 21.4 3.75 4.66 2 29 to 65 45 to 55 9 26.3 28.5 3.75 3.5 2 29 to 65 45 to 55 10 14 53.75 1 7 2 29 to 65 45 to 55 11 9.3 80 1 4.66 2 29 to 65 45 to 55 12 7 107 1 3.5 2 29 to 65 45 to 55 13 2.8 267 1 1.4 2 32 to 57 not applicable 1) Recommended internal signal range maximum is 80% of the VDDA voltage. Span is calculated by the following formula: Span = 80% / gain. 2) Bridge in Voltage Mode with maximum input signal (with XZC = +300% Offset), 14-bit accuracy. Refer to the ZSC31150 Functional Description for usable input signal/common mode range at bridge in current mode. See section 2.3.2 for an explanation of the extended analog zero compensation (XZC). Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 13 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 2.3.2. Offset Compensation The ZSC31150 supports two methods of sensor offset compensation (zero shift): Digital offset correction XZC: analog compensation for large offset values (up to a maximum of approximately 300% of the span, depending on the gain adjustment) The digital sensor offset correction will be processed during the digital signal correction/conditioning by the calibration microcontroller (CMC). Analog sensor offset pre-compensation is needed for compensation of large offset values, which would overdrive the analog signal path by uncompensated gaining. For analog sensor offset pre-compensation, a compensation voltage is added in the analog pre-gaining signal path (coarse offset removal). The analog offset compensation in the AFE can be adjusted by 6 EEPROM bits (refer to the ZSC31150 Functional Description for details). Table 2.2 Analog Zero Point Shift Ranges (XZC) PGA gain aIN Max. Span VIN_SP [mV/V] Offset shift per step as % of full span Approximate maximum offset shift [mV/V] Approximate maximum shift [% VIN_SP] (at ± 31) 420 1.8 12.5 % 7.8 388 % 280 2.7 7.6 % 7.1 237 % 210 3.6 12.5 % 15.5 388 % 140 5.4 7.6 % 14.2 237 % 105 7.1 12.5 % 31 388 % 70 10.7 7.6 % 28 237 % 52.5 14.3 12.5 % 32 388 % 35 21.4 7.6 % 57 237 % 26.3 28.5 5.2 % 52 161 % 14 53.75 12.5 % 194 388 % 9.3 80 7.6 % 189 237 % 7 107 5.2 % 161 161 % 2.8 267 0.83 % 72 26 % 2.3.3. Measurement Cycle The complete measurement cycle is controlled by the CMC. Depending on EEPROM settings, the multiplexer (MUX) selects the following input signals in a defined sequence: Temperature measured by external diode or thermistor, internal pn-junction, or bridge Internal offset of the input channel (VOFF) Pre-amplified bridge sensor signal Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 14 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner The cycle diagram in Figure 2.2 shows the basic structure of the measurement cycle. The bridge sensor measurement count can be configured in EEPROM for a value within n=<1,31>. After power-on, the startup routine is processed, which performs all measurements needed to acquire an initial valid conditioned sensor output. After the startup routine, the normal measurement cycle runs. Note: The “CMV,” “SSC/SCC+” and “SSC/SCC-” measurements are always performed in every cycle independent of the EEPROM configuration. Figure 2.2 Measurement Cycle Start routine 2.3.4. 1 Temperature auto-zero n Bridge sensor measurement 1 Temperature measurement n Bridge sensor measurement 1 Bridge sensor auto-zero n Bridge sensor measurement 1 CMV n Bridge sensor measurement 1 SSC/SCC+ n Bridge sensor measurement 1 SSC/SCC- n Bridge sensor measurement Analog-to-Digital Converter The ADC is an integrating analog-to-digital converter in full differential switched capacitor technique. Programmable ADC resolutions are rADC=<13, 14> or with segmentation, rADC=<15, 16> bit. The ADC can be used as a first or second order converter. In the first order mode, it is inherently monotone and insensitive to short and long-term instability of the clock frequency. The conversion cycle time depends on the desired resolution and can be roughly calculated by the following equation where rADC is the ADC resolution and tADC_1 is the conversion cycle time in seconds in first-order mode: 2rADC t ADC_1 fOSC 2 Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 15 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner In the second order mode, two conversions are stacked with the advantage of a much shorter conversion cycle time but the drawback of a lower noise immunity caused by the shorter signal integration period. The approximate conversion cycle time tADC_2 in second-order mode is calculated by the following equation: t ADC_2 2( rADC 3) / 2 fOSC 2 The calculation formulas for tADC give an overview of conversion time for one AD conversion. Refer to the ZSC31150 Bandwidth Calculation Spreadsheet for detailed calculations for sampling time and bandwidth. The result of the AD conversion is a relative counter result corresponding to the following equation (see the ZSC31150 Functional Description for more detailed equations): V Z ADC 2rADC ADC_DIFF RS ADC V ADC_REF ZADC Number of counts (result of the conversion) rADC Selected ADC resolution in bits VADC_DIFF Differential input voltage of the ADC VADC_REF Reference voltage of the ADC RSADC Digital ADC range shift (RSADC = /16, /8, /4, /2, controlled by the EEPROM setting) 1 1 1 1 The sensor input signal can be shifted to the optimal input range of the ADC with the RSADC value. Table 2.3 Analog Output Resolution versus Sample Rate ADC Adjustment ADC Order 1 2 Approximated Output Resolution 2) Sample Rate 2) fCON Averaged Bandwidth at fCLK rADC Digital Analog fCLK=3MHz fCLK=4MHz fCLK=3MHz fCLK=4MHz [Bit] [Bit] [Bit] [Hz] [Hz] [Hz] [Hz] 13 13 12 345 460 130 172 14 14 12 178 237 67 89 15 14 12 90 120 34 45 16 14 12 45 61 17 23 13 13 12 5859 7813 2203 2937 14 14 12 3906 5208 1469 1958 15 14 12 2930 3906 1101 1468 16 14 12 1953 2604 734 979 1) The ADC resolution should be one bit higher than the required output resolution if the AFE gain is adjusted so that more than 50% of the input range is used. Otherwise the ADC resolution should be more than one bit higher than the required output resolution. 2) The sampling rate (A/D conversion time) is only a part of the whole cycle; refer to the ZSC31150 Bandwidth Calculation Spreadsheet for detailed information. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 16 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner Note: The ADC’s reference voltage ADCVREF is defined by the potential between <VBR_T> and <VBR_B> (or <VDDA> to <VSSA>, if selected in EEPROM by the bit CFGAPP:BREF=1). Theoretically, the input range ADCRANGE_INP of the ADC is equivalent to the ADC’s reference voltage. In practice, the maximum ADC input range used should be from 10% to 90% of ADCRANGE_INP, which is a necessary condition for ensuring the specified accuracy, stability, and nonlinearity parameters of the AFE. This condition is also valid for whole temperature range and all applicable sensor tolerances. The ZSC31150 does not have an internal failsafe function that verifies that the input meets this condition. 2.4. Temperature Measurement The ZSC31150 supports four different methods for acquiring the temperature data needed for calibration of the sensor signal in the specified temperature range. Temperature data can be acquired using one of these temperature sensors: an internal pn-junction temperature sensor an external pn-junction temperature sensor connected to sensor top potential (VBRTOP) an external resistive half bridge temperature sensor the temperature coefficient of the sensor bridge at bridge current excitation Refer to the ZSC31150 Functional Description for a detailed explanation of temperature sensor adaptation and adjustment. 2.5. System Control and Conditioning Calculation The system control supports the following tasks/features: Controlling the measurement cycle according to the EEPROM-stored configuration data Performing the16-bit correction calculation for each measurement signal using the EEPROM-stored calibration coefficients and ROM-based algorithms; i.e., the signal conditioning Managing the start-up sequence and starting signal conditioning Handling communication requests received by the digital interface Managing failsafe tasks for the functions of the ZSC31150 and indicating detected errors with diagnostic states Refer to the ZSC31150 Functional Description for a detailed description. 2.5.1. Operation Modes The internal state machine has three main states: The continuously running signal conditioning mode, which is called Normal Operation Mode (NOM) The calibration mode with access to all internal registers and states, which is called Command Mode (CM) The failure messaging mode, which is called Diagnostic Mode (DM) Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 17 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 2.5.2. Start Up Phase 1 The start-up phase consists of following segments: 1. Internal supply voltage settling phase (i.e., the VDDA - VSSA potential), which is ended when the reset signal is disabled through the power-on clear block (POR). Refer to the ZSC31150 Technical Note – High Voltage Protection document, section 4 for power on/off thresholds. Time (from beginning with VDDA-VSSA=0V): 500µs to 2000µs; AOUT is in tri-state 2. System start, EEPROM read out, and signature check (and ROM check if selected by setting EEPROM bit CFGAPP:CHKROM=1). Time: ~200µs (~9000µs with ROM-check; i.e., 28180 clocks); AOUT is LOW (DM) 3. Processing the start routine for signal conditioning (all measurements and conditioning calculations). Time: 5 x A/D conversion time; AOUT behavior depends on selected OWI mode (refer to section 2.6): OWIANA & OWIDIS => AOUT is LOW (DM) OWIWIN & OWIENA => AOUT is in tri-state The analog output AOUT will be activated at the end of the start-up phase depending on the adjusted output and communication mode (refer to section 2.6). If errors are detected, the Diagnostic Mode (DM) is activated and the diagnostic output signal is driven at the output. After the start-up phase, the continuously running measurement and calibration cycle is started. Refer to ZSC31150 Bandwidth Calculation Spreadsheet for detailed information about output update rate. 2.5.3. Conditioning Calculation The digitalized value for the bridge sensor measurement (acquired raw data) is processed with the correction formula to remove offset and temperature dependency and to compensate nonlinearity up to 3rd order. The result of the correction calculation is a non-negative 15-bit value for the bridge sensor in the range [0; 1). This value P is clipped with programmed limitation coefficients and continuously written to the output register of the digital serial interface and the output DAC. Note: The conditioning includes up to third-order nonlinearity sensor input correction. The available adjustment ranges depend on the specific calibration parameters; for a detailed description, refer to ZSC31150 Functional Description. Basically, offset compensation and linear correction are only limited by the loss of resolution they will cause. The second-order correction is possible up to approximately 30% of the full scale difference from a straight line; third order is possible up to approximately 20% (ADC resolution = 13-bit). The calibration principle used is able to reduce existing nonlinearity errors of the sensor up to 90%. The temperature calibration includes first and second order correction and should be fairly sufficient in all relevant cases. ADC resolution also influences calibration possibilities; e.g., 1 additional bit of resolution reduces the calibration range by approximately 50%. The maximum calculation input data width is 14-bit. The 15 or 16 bit ADC resolution mode uses only a 14-bit segment of the ADC range. 1 All timings described are roughly estimated values and are affected by the internal clock frequency. Timings are estimated for fCLK=3MHz. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 18 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 2.6. Analog Output AOUT The analog output is used for outputting the analog signal conditioning result and for “end of line” communication TM via the ZACwire interface one-wire communication interface (OWI). The ZSC31150 supports four different modes of the analog output in combination with the OWI behavior: Analog output is deactivated; OWI communication is enabled. Analog output is active (~2ms after power-on); OWI communication is disabled. Analog output will be activated after the time window; OWI communication is enabled in a time window of ~500ms (maximum); transmission of the “START_CM” command must be finished during the time window. OWIANA: Analog output will be activated after a ~2ms power on time; OWI communication is enabled in a time window of ~500ms (maximum); transmission of the START_CM” command must be finished during time window; to communicate, the internal driven potential at AOUT must be overwritten by the external communication master (AOUT drive capability is current limited). The analog output potential is driven by a unity gain output buffer for which the input signal is generated by a 12.4-bit resistor-string DAC. The output buffer (BAMP), which is a rail-to-rail op amp, is offset compensated and current limited. Therefore, a short-circuit of the analog output to ground or the power supply does not damage the ZSC31150. 2.7. OWIENA: OWIDIS: OWIWIN: Serial Digital Interface The ZSC31150 includes a serial digital interface (SIF), which is used for communication with the circuit to calibrate the sensor module. The serial interface is able to communicate with two communication protocols: I²C™ and the ZACwire™ one-wire communication interface (OWI). The OWI can be used to for an “end of line” calibration via the analog output AOUT of the complete assembled sensor module. Refer to the ZSC31150 Functional Description for a detailed description of the serial interfaces and communication protocols. 2.8. Failsafe Features, Watchdog and Error Detection The ZSC31150 detects various possible errors. A detected error is indicated by a change in the internal status in Diagnostic Mode (DM). In this case, the analog output is set to LOW (minimum possible output value; i.e., the lower diagnostic range LDR) and the output registers of the digital serial interface are set to a significant error code. A watchdog oversees the continuous operation of the CMC and the running measurement loop. The operation of the internal clock oscillator is verified continuously by the oscillator failure detection. A check of the sensor bridge for broken wires is done continuously by two comparators watching the input voltage of each input (sensor connection and short check). Additionally, the common mode voltages of the sensor and sensor input short are watched continuously (sensor aging). Different functions and blocks in the digital section, e.g. the RAM, ROM, EEPROM, and register content, are watched continuously. Refer to the ZSC31150 Functional Description for a detailed description of safety features and methods of error indication. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 19 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 2.9. High Voltage, Reverse Polarity, and Short Circuit Protection The ZSC31150 is designed for 5V power supply operation. The ZSC31150 and the connected sensor are protected from overvoltage and reverse polarity damage by an internal supply voltage limiter. The analog output AOUT can be connected with all potentials (short circuit, overvoltage, and reverse voltage) in the protection range under all potential conditions at the VDDE and VSSE pins. All external components (see section 3) are required to guarantee this operation. The protection is not time limited. Refer the ZSC31150 Technical Note – High Voltage Protection for a detailed description of protection cases and conditions. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 20 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 3 Application Circuit Examples The application circuits contain external components that are needed for over-voltage, reverse polarity, and short circuit protection. Recommendation: Check the ZSC31150 product page www.zmdi.com/zsc31150 for other application examples given in application notes. Note: Some application notes require a customer login—see section 9 for details. Table 3.1 Application Circuit Parameters Symbol Parameter Min C1 C 100 C2 C 100 C 4 C 0 C3 1) C4, C5 1) Typ 1) R Unit 470 nF Notes nF 47 160 nF The value of C3 is the sum of the load capacitor and the cable capacitance 10 nF Recommended to increase EMC immunity. 10 kΩ Refer to section 1.2. Ω R1 RIBR Max Higher values for C3, C4, and C5 increase EMC immunity. Figure 3.1 Bridge in Voltage Mode, External Diode Temperature Sensor Out / OWI GND C2 100nF 8 VSSE VDDE 7 +4.5V to +5.5V C3 47nF 10 VBN 11 VBR_B 12 VBP C4 C5 VDD 6 ZSC31150 9 AOUT Sensor Bridge VSUPP n.c. 5 SCL 4 SCL SDA 3 SDA Serial Interface 13 VBR_T VSSA 2 14 IRTEMP VDDA 1 C1 100nF Temperature Sensor Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 21 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner Figure 3.2 Bridge in Voltage Mode, External Thermistor Out / OWI GND C2 100nF 8 VSSE VDDE 7 VSUPP +4.5V to +5.5V C3 47nF 10 VBN 11 VBR_B 12 VBP VDD 6 ZSC31150 9 AOUT Sensor Bridge n.c. 5 SCL 4 SCL SDA 3 SDA Serial Interface R1 13 VBR_T VSSA 2 14 IRTEMP VDDA 1 PT1000 C4 C5 C1 100nF Temperature Sensor Figure 3.3 Bridge in Current Mode, Temperature Measurement via Bridge TC Out / OWI GND C2 100nF 8 VSSE VDDE 7 +4.5V to +5.5V C3 47nF 10 VBN C4* 11 VBR_B C5* 12 VBP VDD 6 ZSC31150 9 AOUT 13 VBR_T Sensor Bridge VSUPP n.c. 5 SCL 4 SCL SDA 3 SDA Serial Interface VSSA 2 C1 100nF 14 IRTEMP VDDA 1 * C4 and C5 must be connected to VBR_B when using Current Mode because VBR_B and VSSA are not shorted in this case. RIBR Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 22 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 4 Pin Configuration, Latch-Up and ESD Protection 4.1. Pin Configuration and Latch-up Conditions Table 4.1 Pin Configuration and Latch-Up Conditions Pin Name 1 VDDA Positive analog supply voltage Analog IO Required/- 2 VSSA Negative analog supply voltage Analog IO Required/- 3 SDA I²C Digital IO, pull-up -/VDDA 4 SCL I²C™ clock Digital IN, pull-up -/VDDA Trigger Current/Voltage to VDDA/VSSA: +/-100mA or 8/-4V 5 N.C. No connection 6 VDD Positive digital supply voltage Analog IO Required or open/- Only capacitor to VSSA is allowed, otherwise no application access 7 VDDE Positive external supply voltage Supply Required/- Trigger Current/Voltage: -100mA/33V 8 VSSE Negative external supply voltage Ground Required/- 9 AOUT Analog output & one wire IF IO IO Required/- 10 VBN 11 VBR_B 12 VBP 13 14 1) Description TM data IO Notes Usage/ 1) Connection Negative input sensor bridge Analog IN Required/- Bridge bottom potential Analog IO Required/VSSA Positive input sensor bridge Analog IN Required/- VBR_T Bridge top potential Analog IO Required/VDDA IRTEMP Temp sensor & current source resistor Analog IO -/VDDA, VSSA Latch-up Related Application Circuit Restrictions and/or Notes Trigger Current/Voltage: -100mA/33V Depending on application circuit, short to VDDA/VSSA possible Depending on application circuit Usage: If “Required” is specified, an electrical connection is necessary; refer to the application circuits in section 3. Connection: To be connected to this potential if not used or if no application/configuration-related constraints are given. Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 23 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 4.2. ESD Protection All pins have an ESD protection of >2000V. Additionally, the pins VDDE, VSSE and AOUT have an ESD protection of >4000V. ESD protection referenced to the Human Body Model is tested with devices during product qualification. The ESD test follows the Human Body Model with 1.5kΩ/100pF based on MIL 883, Method 3015.7. 5 5.1. Package SSOP14 Package The standard packages of the ZSC31150 are the SSOP14 green package (5.3mm body width) with a lead pitch of 0.65mm and the DFN14 (4mmx5mm) package with a lead pitch of 0.5mm. For the SSOP14 package markings shown in Figure 5.1, YYWW refers to the last two digits of the year (YY) and two digits for the work-week designation (WW). XXXXXXXX refers to the lot number. Figure 5.1 SSOP14 Pin Diagram VDDE AOUT VDD VBN VBR_B VBP ZSC 31150GEG1 XXXXXXXX YYWW VSSE Data Sheet July 27, 2015 14 IRTEMP SCL SDA VSSA 1 VBR_T N.C. VDDA © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 24 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 5.2. DFN14 Package For the DFN14 package, the pin assignment is the same as in SSOP14. Refer to the ZSC31150 Technical Note – Die and Package Specifications for a description of package markings. Figure 5.2 provides the dimensions for the DFN14 package option, which are based on JEDEC MO-229. The DFN14 package has wettable flanks. A1 A Figure 5.2 Outline Drawing for DFN14 Package with Wettable Flanks 0,08 14 8 8 14 Exposed Pad HD 4.4 x 2.5 mm Bottom View L Top View 1 HE 7 7 July 27, 2015 b Dimension Minimum Maximum A 0.8 0.9 A1 0 0.05 b 0.2 0.3 e Data Sheet 1 e 0.5 nominal HD 3.9 4.1 HE 4.9 5.1 L 0.3 0.5 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 25 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 6 Quality and Reliability The ZSC31150 is qualified according to the AEC-Q100 standard, operating temperature grade 0. A fit rate < 5fit (temperature =55°C, S=60%) is guaranteed. A typical fit rate of the C7D technology, which is used for ZSC31150, is 2.5fit. 7 Customization For high-volume applications, which require an upgraded or downgraded functionality compared to the standard ZSC31150, ZMDI can customize the circuit design by adding or removing certain functional blocks. For this purpose, ZMDI has a considerable library of sensor-dedicated circuitry blocks. As a result, ZMDI can provide a custom solution quickly. Please contact ZMDI for further information. 8 Ordering Information Product Sales Code Description Package ZSC31150GEB ZSC31150 Die — Temperature range: -40°C to +150°C Unsawn on Wafer ZSC31150GEC ZSC31150 Die — Temperature range: -40°C to +150°C Sawn on Wafer Frame ZSC31150GED ZSC31150 Die — Temperature range: -40°C to +150°C Waffle Pack ZSC31150GEG2-R ZSC31150 DFN14, 5x4mm with wettable flank—Temperature range: -40°C to 150°C Tape & Reel ZSC31150GAG2-R ZSC31150 DFN14, 5x4mm with wettable flank —Temperature range: -40°C to 125°C Tape & Reel ZSC31150GEG1 ZSC31150 SSOP14—Temperature range: -40°C to +150°C Tube: add “-T” to sales code Tape & Reel: add “-R” ZSC31150GLG1 ZSC31150 SSOP14—Temperature range: -40°C to +150°C (Long life: 5000h @150°C) Tube: add “-T” to sales code Tape & Reel: add “-R” ZSC31150GAG1 ZSC31150 SSOP14—Temperature range: -40°C to +125°C Tube: add “-T” to sales code Tape & Reel: add “-R” ZSC31150KIT Evaluation Kit V1.2 ZSC31150 SSC Evaluation Kit: three interconnecting boards, five ZSC31150 SSOP14 samples, USB cable (software can be downloaded from product page at www.zmdi.com/zsc31150) ZSC31150 Mass Calibration System V1.1 Modular Mass Calibration System (MSC) for ZSC31150: MCS boards, cable, connectors Data Sheet July 27, 2015 (software can be downloaded from product page at www.zmdi.com/zsc31150) © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 26 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner 9 Related Documents and Tools Note: X_xy refers to the current revision of the document. Note: Documents marked with an asterisk (*) require a login account for access on the web. For detailed instructions, visit www.zmdi.com/login-account-setup-procedure. Note: Documents marked with a double asterisk (**) are only available upon request. For these documents, please contact ZMDI (see contact information on last page). Note: Documents/tools marked with three asterisks (***) are available on our “SSC Tools” web page www.zmdi.com/ssc-tools. Document/Tool File Name ZSC31150 Feature Sheet ZSC31150_FeatureSheet_RevX_xy.pdf ZSC31150 Functional Description ZSC31150_FunctionalDescription_RevX_xy.pdf ZSC31150 Evaluation Kit Description ZSC31150 Evaluation Kit Description RevX_xy.pdf SSC AN - Single Ended Input SSC AN - Single Ended Input RevX_xy.pdf ZSC31150 Technical Note – High Voltage Protection * ZSC31150_Tech_Note_HighVoltageProt_RevX_xy.pdf SSC Temperature Profile Calculation Spreadsheet * SSC Temperature Profile Calculation Spreadsheet RevX_xy.pdf ZSC31150 Technical Note – Die and Package Specifications ** ZSC31150_TN_Die+PackageSpec_RevX_xy.pdf ZSC31150 Bandwidth Calculation Spreadsheet ** ZSC31150_BandwidthCalculationRev.X_xy CAD Model Library Files for ZMDI SSC ICs *** Access files by clicking on the link below the heading “CAD Model Files” on the ZMDI web page www.zmdi.com/ssc-tools. Visit the ZSC31150 product page www.zmdi.com/zsc31150 on ZMDI’s website www.zmdi.com or contact your nearest sales office for the latest version of these documents. 10 Glossary Term Description ADC Analog-to-Digital Converter AEC Automotive Electronics Council AFE Analog Front End AOUT Analog Output BAMP Buffer Amplifier CM Command Mode CMC Calibration Microcontroller CMV Common Mode Voltage CMOS Complementary Metal Oxide Semiconductor DAC Digital-to-Analog Converter Data Sheet © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. July 27, 2015 27 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner Term Description DM Diagnostic Mode EEPROM Electrically Erasable Programmable Read Only Memory ESD Electrostatic Device LDR Lower Diagnostic Range MUX Multiplexer NOM Normal Operation Mode OWI One Wire Interface P Bridge Sensor Measurement; e.g., Pressure Sensor PGA Programmable Gain Amplifier POC Power on Clear RAM Random-Access Memory RISC Reduced Instruction Set Computer RMS Root-Mean-Square ROM Read Only Memory SCC Sensor Connection Check SIF Serial Interface SSC+ Positive-biased Sensor Short Check SSC- Negative-biased Sensor Short Check TS Temperature Sensor XZC eXtended Zero Compensation 11 Document Revision History Revision Date Description 0.46 June 12, 2008 First release after format update 0.47 July 20, 2008 Update after review 1.01 September 20, 2008 Section 6: fit rate added. Section 1.5.2: ROM check time revised/corrected. Section 5.3.4.3: SC – no detection limit added 1.02 September 20, 2009 Update to new ZMDI template 1.03 October 2, 2009 Update to ZMDI denotation 1.04 October 22, 2009 Formatting and linking issues solved Data Sheet July 27, 2015 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 28 of 29 ZSC31150 Fast Automotive Sensor Signal Conditioner Revision Date Description 1.05 February 26, 2010 Update for ZMDI template, including ZSC31150 Feature Sheet at page 2&3 Added ordering codes for ZSC31150 and evaluation kits. Extended glossary. Update for contact information. 1.06 July 29, 2010 Correct “Offset shift per step” and “Approx. maximum offset shift” in Table 2.2 for PGA gain = 105 and 52.5. Moved 1.4.1.6 “Internal pull-up resistor” into section 1.4.1 in Table 1.2. Redrew of Sensor Bridge in Figure 3.1, Figure 3.2 and Figure 3.3. Added comment for C4 and C5 in Figure 3.3. Renamed ZMD31150 as ZSC31150. 1.07 August 31, 2010 Connection of RIBR in Figure 3.3 corrected 1.08 August 15, 2011 Update ordering information with “Long Life Automotive” in “Ordering Information” on page 3 and section 8) 2.00 December 15, 2012 Update for part numbers and ZMDI contact information. Minor edits. 2.10 March 31, 2014 Revision of specifications in section 1.4.2. Recommended internal signal range revised to 80%. OWI interface parameters list extended. ADC formula corrected. DFN14 package added. Minor edits for clarity. Updated contact information. Updated imagery for cover and headings. 2.20 April 30, 2014 Added notation that DFN14 package has wettable flanks. Update for contact information and addition of CAD model files to section 9. 2.30 August 27, 2014 Minor edits on page 2. Minor edits for die description in part code tables. 2.40 December 3, 2014 Corrected connection of temperature PTC sensor in Figure 3.2 Update for contact information. 2.41 July 27, 2015 Update for order code for ZSC31150 SSC Evaluation Kit order code. Update for contact information. Sales and Further Information www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Global Headquarters Grenzstrasse 28 01109 Dresden, Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA Central Office: Phone +49.351.8822.306 Fax +49.351.8822.337 USA Phone 1.855.275.9634 Phone +1.408.883.6310 Fax +1.408.883.6358 European Technical Support Phone +49.351.8822.7.772 Fax +49.351.8822.87.772 DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. European Sales (Stuttgart) Phone +49.711.674517.55 Fax +49.711.674517.87955 Data Sheet July 27, 2015 Zentrum Mikroelektronik Dresden AG, Japan Office 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Zentrum Mikroelektronik Dresden AG, Korea Office U-space 1 Building Unit B, 906-1 660, Daewangpangyo-ro Bundang-gu, Seongnam-si Gyeonggi-do, 463-400 Korea Phone +82.31.950.7679 Fax +82.504.841.3026 © 2015 Zentrum Mikroelektronik Dresden AG — Rev. 2.41 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. 29 of 29