ZSSC1856 Intelligent Battery Sensor IC Brief Description The ZSSC1856 is a dual-channel ADC with an embedded microcontroller for battery sensing/management in automotive, industrial, and medical systems. 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. An integrated flash memory is provided for customer-specific software; e.g., dedicated algorithms for calculating the battery state. During Sleep Mode (e.g., engine off), the system makes periodic measurements to monitor the discharge of the battery. Measurement cycles are controlled by the software and include various wakeup conditions. The ZSSC1856 is optimized for ultralow power consumption and draws only 100µA or less in this mode. Benefits • • • Features • • • • • • • • • • • • • High-precision 18-bit sigma-delta ADC with on-chip voltage reference (5ppm/K) Current channel IBAT offset error: ≤ 10mA IBAT resolution: ≤ 1mA Programmable gain: 4 to 512 Sampling rate: 1Hz to 16kHz Voltage channel Input range: 4 to 28.8V Voltage accuracy: ± 2mV Temperature channel Internal temperature sensor: ± 2°C External temperature sensor (NTC) On-chip precision oscillator (1%) On-chip low-power oscillator ® ARM Cortex™-M0* microcontroller: 32-bit core, 10MHz to 20MHz 96kB Flash/EE Memory with ECC, 8kB SRAM LIN2.1 / SAE J2602-1 Transceiver Directly connected to 12V battery supply Current consumption Normal Mode: 10mA to 20mA Low-Power Mode: ≤ 100µA ® ® * The ARM , Cortex™, and Thumb -2 trademarks are owned by ARM, Ltd. 2 The I C™ trademark is owned by NXP. Precision measurement solution for accurate prediction of battery state of health (SOH), state of charge (SOC) or state of function (SOF) Flexible wake-up modes allow minimum power consumption without sacrificing performance No temperature calibration or external trimming components required Optimized code density through small instruction ® set architecture Thumb -2 * Robust POR concept for harsh automotive environments Industry’s smallest footprint allows minimal module size and cost AEC-Q100 qualified solution • • Available Support • Evaluation Kit & Application Notes Physical Characteristics • Wide operation temperature: -40°C to +125°C Supply voltage: 3.5 to 18 V Small footprint package: PQFN32 5x5 mm • • Basic ZSSC1856 Application Circuit To Harness + - Car Chassis Ground VBAT VDDE Host Controller LIN Interface LIN INP INN Rshunt VDDA NTH + - Battery f VSSA ZSSC1856 GPIO 5 Optional GPIO: SPI, I²C™, UART VSSE NTC © 2012 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 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. ZSSC1856 Intelligent Battery Sensor IC CAR BODY UBAT ZSSC1856 Block Diagram ZSSC1856 Stacked Die Analog Block LP_REG VDDP_REG BG_REF WD_TIMER VDDA_REG VDDC_REG OSC GP_TIMER SD_ADC DIGITAL FILTER CONFIG REGISTER RESULT REGISTER SD_ADC DIGITAL FILTER CALIBRATION DATA PATH SPI SHUNT Digital Block PGA RREF + – BATTERY MUX NTC GPIO: SPI, I C™, UART 2 LIN LIN_PHYS LIN UART SBC RAM FLASH GPIO: SPI, I2C™, UART µC Microcontroller Applications • Intelligent battery sensing for automotive applications; e.g., start/stop systems, e-bikes, scooters, and e-carts • Industrial and medical applica- tions requiring precise battery SOC, SOH and SOF monitoring; e.g., emergency lighting, uninterruptable power supplies, hospital equipment, alarm systems, and more Ordering Information Product Sales Code Description Package ZSSC1856CA6R ZSSC1856 battery sensing IC – temperature range -40°C to +125°C PQFN32 5x5 mm (reel) ZSSC1856KIT V1.0 Modular evaluation and development board for Kit boards, IC samples, USB cable, ZSSC1856 DVD with software and documentation Sales and Further Information www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Grenzstrasse 28 01109 Dresden Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA 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 Zentrum Mikroelektronik Dresden AG, Korean Office POSCO Centre Building West Tower, 11th Floor 892 Daechi, 4-Dong, Kangnam-Gu Seoul, 135-777 Korea Phone +49.351.8822.427 Fax +49.351.8822.8427 Phone +855-ASK-ZMDI (+855.275.9634) Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Phone +82.2.559.0660 Fax +82.2.559.0700 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. © 2012 Zentrum Mikroelektronik Dresden AG — Rev. 0.95 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.