ZSSC1750/51 Data Acquisition System Basis Chip (SBC) Brief Description Benefits The ZSSC1750 and ZSSC1751 are System Basis Chips (SBCs) with a dual-channel ADC for battery sensing/management in automotive, industrial, and medical systems. The ZSSC1750 and ZSSC1751 feature an SPI interface; in addition, the ZSSC1750 has an integrated LIN 2.1 transceiver. One of the two input channels measures the battery current IBAT via the voltage drop at the external shunt resistor. The second channel measures the battery voltage VBAT and the temperature. By simultaneously measuring VBAT and IBAT, it is possible to determine dynamically the internal resistance of the battery, Rdi, which is correlated with the state-of-health (SOH) of the battery. By integrating IBAT, it is possible to determine the stateof-charge (SOC) and the state-of-function (SOF) of the battery. During Sleep Mode, the system makes periodic measurements to monitor the discharge of the battery. Measurement cycles are controlled by user software and include various wake-up conditions. The ZSSC1750/51 is optimized for ultra-low power consumption drawing only 60µA or less in this mode. Integrated, precision measurement solution for accurate prediction of battery state of health (SOH), state of charge (SOC), or state of function (SOF) Robust power-on-reset (POR) concept for harsh automotive environments On-chip precision oscillator accuracy: ±1% On-chip low-power oscillator Only a few external components needed Easy communication via SPI interface Power supply, interrupt, and reset signals for external microcontroller Watchdog timer with dedicated oscillator Industry’s smallest footprint allows minimal module size and cost AEC-Q100 qualified solution Available Support Evaluation Kit Application Notes Physical Characteristics Features Two high-precision 24-bit sigma-delta ADCs (18-bit with no missing codes); sample rate: 1Hz to 16kHz On-chip voltage reference (5ppm/K typical) Current channel IBAT offset error: ≤ 10mA IBAT resolution: ≤ 1mA Programmable gain: 4 to 512 Max. differential input stage input range: ±300mV Voltage channel Input range: 4 to 28.8V Voltage accuracy: ±60ppm FSR* = 1.73mV Temperature channel External temperature sensor (NTC) Factory-calibrated internal temp. sensor: ±2°C LIN 2.1/SAE J2602-1 transceiver (ZSSC1750 only) Typical current consumption Normal Mode: 12mA Sleep Mode: ≤ 60µA Operation temperature up to -40°C to +125°C Supply voltage: 4.2 to 18V Small footprint package: PQFN36 6x6 mm * FSR = full-scale range. Basic ZSSC1750/51 Application Circuit To Harness + - Car Chassis Ground VDDP VBAT VDDE INP INN VDDA Rshunt LIN 3.3V, <30mA LIN-I/F (ZSSC1750 ) RX TX IRQN MCU_RSTN MCU_CLK VDD IRQ RST CLK (opt.) NTH + - Battery NTC µC ZSSC1750/51 NTL VSSA SPI VSSE Interface to Host (e.g. CAN) I/F SPI VSS For more information, contact ZMDI via [email protected] © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — July 10, 2014 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. ZSSC1750/51 Data Acquisition System Basis Chip (SBC) Common Ground VBAT ZSSC1750/51 Block Diagram Analog Block ZSSC1750/51 Analog Front End SBC Digital Block LP_REG VDDP_REG BG_REF WD_TIMER IRQ_CTRL VDDA_REG VDDC_REG SBC_PMU GP_TIMER OSC DIGITAL FILTER CONFIG REGISTER RESULT REGISTER VDDP VDDE VDDC VDDA SLEEPN WDT_DIS INP Applications SHUNT Intelligent battery monitoring in SD_ADC INN automotive applications; start/stop systems, e-bikes, scooters, and e-carts IRQN + – BATTERY and photovoltaic applications; LIN Rinn tck NTL RXD TMS csn sclk mosi miso TRSTN tms VSSR open sleepn VDDL TEST SLEEPN n.c . ZSSC1751 INN Cinn 10nF Rref 75kΩ Rntc 10kΩ trstn TESTL INP Cin 100nF BAT- Cdda 470nF VDDC VPP VSSR sto TCK VDDP sleepn VDDL TEST STO n.c. VSSA mcu_clk STO sto TCK tck TMS tms NTH NC VSSN wdt_dis MCU_CLK VDDA NTL Cntc 470pF WDT_DIS VSSA NC MISO 220Ω VSS TESTH MOSI Rshunt 100µΩ Cinp 10nF NC VSSE SCLK mcu_clk VDDA NTH Cntc 470pF VBAT Cddl 10nF CSN MCU_CLK VSSA MISO Rref 75kΩ 1 100nF IRQN wdt_dis Rinp 10µF MCU_RSTN WDT_DIS Chassis GND 220Ω Cinn 10nF Rntc 10kΩ ZSSC1750 MOSI 220Ω Cdda 470nF n.c . INN Rdde Cdde1 Cdde2 Cddp 2.2µF VDDE TESTL SCLK Rinn BAT- Ddde VSSA INP Cin 100nF LIN BAS21 2.2Ω CSN 220Ω Cbat 100nF VSSLIN n.c. IRQN Rshunt 100µΩ Cinp 10nF Cddc 2.2µF Rbat BAT+ 100Ω TESTH MCU_RSTN Rinp Available in ZSSC1750 only LIN Clin 220pF VSSE TXD Chassis GND 100nF Cddl 10nF SLEEPN VDDE 10µF VDDC VBAT 1 VPP Cddp 2.2µF VDDP Rdde Cdde1 Cdde2 RXD TXD LIN_PHYS (1) ZSSC1751 Typical Application Circuit Cddc 2.2µF Rbat Ddde CSN SCLK MISO MOSI SPI MUX LIN ZSSC1750 Typical Application Circuit BAS21 2.2Ω CALIBRATION DATA PATH NTC 1) Cbat 100nF DIGITAL FILTER SD_ADC NTH NTL High precision data acquisition 100Ω MCU_RSTN RREF Battery monitoring in Industrial, medical BAT+ MCU_CLK PGA VBAT csn sclk mosi miso TRSTN trstn VSSN VDDP open rxd txd mcu_rstn irqn mcu_rstn irqn Ordering Information Product Sales Code ZSSC1750EA1B ZSSC1750EA3R ZSSC1751EA3R ZSSC1750KIT V1.1 Description Package ZSSC1750 Battery Sensing SBC—Temperature Range: -40°C to 125°C Tested die on unsawn wafer ZSSC1750 Battery Sensing SBC—Temperature Range: -40°C to 125°C PQFN36 6x6 mm, reel ZSSC1751 Battery Sensing SBC—Temperature Range: -40°C to 125°C PQFN36 6x6 mm, reel ZSSC1750/51 Evaluation Kit: modular evaluation and development board for ZSSC1750/51, 3 IC samples, and USB cable (software and documentation can be downloaded from the product page at www.zmdi.com/zssc175x) 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. 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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 11th Floor, Unit JA-1102 670 Sampyeong-dong Bundang-gu, Seongnam-si Gyeonggi-do, 463-400 Korea Phone +82.31.950.7679 Fax +82.504.841.3026 © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — July 10, 2014 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.