Intelligent Battery Sensor IC

The ZSSC1956 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 input 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 is off), the system makes periodic measurements to monitor the discharge of the battery. Measurement cycles are controlled by the software and include various wake-up conditions. The ZSSC1956 is optimized for ultra-low power consumption and draws only 100µA or less in Low-Power Mode.

Features

  • High-precision 24-bit sigma-delta ADC (18-bit with no missing codes)
  • Sample rate: 1Hz – 16kHz
  • On-chip voltage reference (5ppm/K typical)
  • Current channel IBAT offset error: ≤10mA
  • Current channel IBAT resolution: ≤1mA
  • Current channel programmable gain: 4 to 512
  • Current channel differential input stage input range: ± 300mV
  • Voltage channel input range: 4 to 28.8V
  • Voltage channel accuracy: better than ±2mV
  • Temperature channel internal temperature sensor: ± 2°C
  • Temperature channel external temperature sensor (NTC)
  • On-chip precision oscillator (1%) and on-chip low-power oscillator
  • ARM® Cortex™-M0 microcontroller: 32-bit core, 10MHz to 20MHz
  • 96kB Flash/EE Memory with ECC, 8kB SRAM
  • LIN2.2 /SAE J2602-2 compliant
  • Directly connected to 12V battery supply
  • Normal Mode current consumption: 10mA to 20mA
  • Low-Power Mode current consumption: ≤ 100µA

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
ZSSC1956BA3R Active NLG32 VFQFPN 32 -40 to 125°C Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZSSC1956 Short-form Datasheet Short Form Datasheet PDF 178 KB Jan 28, 2016
ZSSC1956 Datasheet Datasheet PDF 2.12 MB Jan 28, 2016
User Guides & Manuals
IDT ARM Cortex-M0 User Guide Manual PDF 744 KB Apr 21, 2016
Other
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 18, 2016

Software & Tools

Title Other Languages Type Format File Size Date
ZSSC1956 Evaluation Software Release 4.0.9 (zip) Software ZIP 8.87 MB Apr 7, 2016

Evaluation Boards

Part Number Title Sort ascending
ZSSC1956KIT Evaluation Kit for ZSSC1956