Sensor IC. ZSSC1956 Datasheet

ZSSC1956 IC. Datasheet pdf. Equivalent

ZSSC1956 Datasheet
Recommendation ZSSC1956 Datasheet
Part ZSSC1956
Description Intelligent Battery Sensor IC
Feature ZSSC1956; Intelligent Battery Sensor IC ZSSC1956 Datasheet Brief Description The ZSSC1956 IC is a dual-chann.
Manufacture IDT
Datasheet
Download ZSSC1956 Datasheet




IDT ZSSC1956
Intelligent Battery Sensor IC
ZSSC1956
Datasheet
Brief Description
The ZSSC1956 IC is a dual-channel analog-to-digital
converter (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 dis-
charge 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
IBAT resolution: ≤ 1mA
Programmable gain: 4 to 512
Differential input stage input range: ± 300mV
Voltage channel
Input range: 4 to 28.8V
Voltage accuracy: better than ±2mV
Temperature channel
Internal temperature sensor: ± 2°C
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
© 2016 Integrated Device Technology, Inc.
Benefits
Integrated, 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 power-on-reset (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: 4.2 to 18V
Small footprint package: PQFN32 5x5 mm
Basic ZSSC1956 Application Circuit
+ -To Harness
Car Chassis Ground
Rshunt
+-
Battery
f
VBAT
VDDE
INP
INN
Host
LIN
Controller
LIN
Interface
VDDA ZSSC1956
NTH
NTC
NTL VSSA
GPIO
VSSE
5
Optional
GPIO:
SPI, I²C,
UART
Module Ground
* The ARM®, Cortex™, and Thumb®-2 trademarks are owned by ARM, Ltd.
The I2C™ trademark is owned by NXP.
1 January 29, 2016



IDT ZSSC1956
Intelligent Battery Sensor IC
ZSSC1956
Datasheet
ZSSC1956
Block Diagram
UBAT
CAR
BODY
SHUNT
LP_REG
ZSSC1956 Stacked Die
VDDP_REG
BG_REF
WD_TIMER
VDDA_REG VDDC_REG
PGA
SD_ADC
OSC
DIGITAL
FILTER
GP_TIMER
CONFIG
REGISTER
RESULT
REGISTER
Analog
Block
Digital
Block
RREF
+–
BATTERY
NTC
Module
GND
LIN
Typical Application Circuit
BAT+
Rbat
100Ω
Dbat
GSOT36
Cbat
100nF
Cddp
2.2µF
Cddc
2.2µF
Rtest
1kΩ
Cddl
10nF
Chassis
GND
BAT-
Ddde Rdde Cdde1 Cdde2
BAS21 2.2Ω
10µF 100nF
Rinp
Rshunt 221Ω
100µΩ Rinn
221Ω
Cinp
10nF
Cin
100nF
Cinn
10nF
Cdda
470nF
Rref
75kΩ
Rntc
10kΩ
Cntc
470pF
VBAT VPP VDDP VDDC TEST VSSPC VDDL LIN
1 VDDE
VSSLIN
VSSE
TESTH
VSSA
TESTL
INP STO
ZSSC1956
INN TCK
VSSA
TMS
VDDA
TRSTN
NTH
VSSN
NTL GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 TDO TDI
Clin
220pF
n.c.
n.c.
sto
tck
tms
trstn
MUX
LIN_PHYS
SBC
SD_ADC
LIN
UART
DIGITAL
FILTER
CALIBRATION
DATA PATH
SPI
GPIO:
SPI, I2C, UART
RAM
FLASH
Microcontroller
µC
lin Applications
Intelligent battery sensing for automotive
applications; e.g., start/stop systems, e-bikes,
scooters, and e-carts
Industrial and medical applications requiring
precise battery SOC, SOH
and SOF monitoring; e.g., emergency
lighting, uninterruptable power supplies,
hospital equipment, alarm systems,
and more
GPIO:
SPI,
I2C,
UART
Ordering Information
gpio0 gpio1 gpio2 gpio3 gpio4 tdo tdi
Product Sales Code
ZSSC1956BA3R
ZSSC1956KIT V1.0
Description
Package
ZSSC1956 battery sensing IC – temperature range -40°C to +125°C
PQFN32 5x5 mm (reel)
ZSSC1956 Evaluation Kit: modular evaluation and development board for ZSSC1956, IC samples, and USB cable,
(software and documentation can be downloaded from the product page at www.IDT.com/ZSSC1956)
Corporate Headquarters
6024 Silver Creek Valley Road
San Jose, CA 95138
www.IDT.com
Sales
1-800-345-7015 or 408-284-8200
Fax: 408-284-2775
www.IDT.com/go/sales
Tech Support
www.IDT.com/go/support
DISCLAIMER Integrated Device Technology, Inc. (IDT) reserves the right to modify the products and/or specifications described herein at any time, without notice, at IDT's sole discretion. Performance
specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same way when installed in customer products. The
information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT's products for any particular purpose, an
implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property
rights of IDT or any third parties.
IDT's products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of an IDT product can be
reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT.
Integrated Device Technology, IDT and the IDT logo are trademarks or registered trademarks of IDT and its subsidiaries in the United States and other countries. Other trademarks used herein are the
property of IDT or their respective third party owners. For datasheet type definitions and a glossary of common terms, visit www.idt.com/go/glossary. All contents of this document are copyright of Integrated
Device Technology, Inc. All rights reserved.
© 2016 Integrated Device Technology, Inc.
2
January 29, 2016



IDT ZSSC1956
ZSSC1956 Datasheet
Contents
1 IC Characteristics ........................................................................................................................................... 12
1.1. Absolute Maximum Ratings..................................................................................................................... 12
1.2. Recommended Operating Conditions ..................................................................................................... 13
1.3. Electrical Parameters .............................................................................................................................. 14
2 Circuit Description .......................................................................................................................................... 22
2.1. Overview.................................................................................................................................................. 22
2.2. Digital Block Diagram SBC...................................................................................................................... 24
2.3. Block Diagram MCU ................................................................................................................................ 25
2.4. System Power States .............................................................................................................................. 26
2.4.1. MCU-ON Power State....................................................................................................................... 26
2.4.2. MCU-SLP Power State ..................................................................................................................... 27
2.4.3. MCU-DEEP Power State .................................................................................................................. 27
2.4.4. LP Power State ................................................................................................................................. 27
2.4.5. ULP Power State............................................................................................................................... 28
2.4.6. OFF Power State .............................................................................................................................. 29
3 Functional Block Descriptions SBC................................................................................................................ 30
3.1. SPI Communication between the MCU and SBC ................................................................................... 30
3.1.1. SPI Protocol ...................................................................................................................................... 30
3.2. SBC Register Map ................................................................................................................................... 32
3.3. SBC Clock and Reset Logic .................................................................................................................... 35
3.3.1. Clocks ............................................................................................................................................... 35
3.3.2. Trimming the Low-Power Oscillator .................................................................................................. 36
3.3.3. Clock Trimming and Configuration Registers ................................................................................... 37
3.3.4. Resets ............................................................................................................................................... 39
3.4. SBC Watchdog Timer.............................................................................................................................. 41
3.4.1. Watchdog Registers.......................................................................................................................... 43
3.5. SBC Sleep Timer..................................................................................................................................... 44
3.5.1. Sleep Timer Registers ...................................................................................................................... 46
3.6. SBC Interrupt Controller .......................................................................................................................... 47
3.7. SBC Power Management Unit (PMU) ..................................................................................................... 50
3.7.1. FP State ............................................................................................................................................ 51
3.7.2. LP and ULP States ........................................................................................................................... 52
3.7.3. OFF State.......................................................................................................................................... 60
3.7.4. Registers for Power Configuration and the Discreet Current Measurement Count.......................... 60
3.8. SBC ADC Unit ......................................................................................................................................... 62
3.8.1. ADC Clocks....................................................................................................................................... 64
3.8.2. ADC Data Path.................................................................................................................................. 68
© 2016 Integrated Device Technology, Inc.
3
January 29, 2016







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