ZSSC1750/ZSSC1751 Feature Sheet Rev 1.00

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.

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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
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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.
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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.
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Phone +49.711.674517.55
Fax
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© 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.