Sensor Signal Conditioner for
Safety Switch Applications
ZSSC3136
Datasheet
Brief Description
The ZSSC3136 is a member of the ZSSC313x
family of CMOS integrated circuits for automotive/
industrial sensor applications. All family members
are well suited for highly accurate amplification and
sensor-specific correction of resistive bridge sensor
signals. An internal 16-bit RISC microcontroller
running a correction algorithm compensates sensor
offset, sensitivity, temperature drift, and non-linearity
of the connected sensor element. The required
calibration coefficients are stored by the one-pass
calibration procedure in an on-chip EEPROM.
The ZSSC3136 is optimized for SIL (Safety Integrity
Level) rated switch applications. The integrated
adjustable digital filter offers the possibility of setting
up fast switching real-time applications as well as
stabilized switching applications in the case of
disturbed or unstable input signals.
In addition to the general features for switch appli-
cations, the ZSSC3136 offers the capability to set up
safety-relevant SIL2 rated switches due to its
extended safety functionalities.
Benefits
•
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Capability for setting up SIL level 2 applications
Application-focused feature set
No external trimming components required
Only a few external protection devices needed
PC-controlled configuration and one-pass/
TM
end-of-line calibration via I²C™* or ZACwire
interface: simple, cost-efficient, quick, and pre-
cise
High accuracy (0.25% FSO** @ -25 to +85°C;
0.5% FSO @ -40 to +125°C)
Optimized for automotive/ industrial environment
due to robust protection circuitries, excellent
electromagnetic compatibility and AEC-Q100
qualification
Available Support
•
•
•
Evaluation Kits
Application Notes
Mass Calibration System
Features
•
•
•
•
•
•
•
•
Physical Characteristics
Supply voltage 4.5 to 5.5 V
•
Operation temperature: -40°C to +125°C
(-40°C to +150°C extended temperature range
depending on product version)
•
Available in RoHS-compliant JEDEC-SSOP14
package or delivery as die
ZSSC3136 Minimum Application Requirements
•
•
•
•
•
•
•
Analog gain of 105, maximum overall
gain of 420
Sample rate: 200 Hz maximum
ADC resolution: 13/14 bit
External temperature sensor
Safety functionalities: Calibration microcontroller,
sensor connection, analog front-end
Adjustable to nearly all resistive bridge sensor
types
Digital compensation of sensor offset, sensitivity,
temperature drift, and non-linearity
Output options: ratiometric analog voltage output
(5 - 95% in maximum, 12.4 bit resolution) or
TM
ZACwire (digital One-Wire Interface (OWI))
Sensor biasing by voltage
High voltage protection up to 33 V
Supply current: max. 5.5mA
Reverse polarity and short circuit protection
Wide operation temperature: -40 to +150°C
Traceability by user-defined EEPROM entries
* Note: I
2
C™ is a trademark of NXP.
** FSO = Full Scale Output.
VCC
Sensor
Module
ZSSC3136
OUT
GND
© 2016 Integrated Device Technology, Inc.
1
January 22, 2016
Sensor Signal Conditioner for
Safety Switch Applications
ZSSC3136
Datasheet
ZSSC3136 Switch Application Example
Out
GND
C2
100nF
8
VSSE
C3
47nF
VDDE
7
+4.5V to +5.5V
V
SUPP
Sensor Bridge
9
AOUT
10
VBN
11
VBR_B
12
VBP
R1
VDD
6
ZSSC3136
V
SUPP
n.c.
5
SCL
4
Out
SDA
3
14
GND
13
GPIO
R1
2kΩ
12
V
SUPP
13
VBR_T
14
IRTEMP
VSSA
2
VDDA
1
C1
100nF
C4
C5
Temperature Sensor
Ordering Information
(See data sheet section 8 for complete delivery options.)
Product Sales Code
ZSSC3136BE1
ZSSC3136BA1
ZSSC3136BE2
ZSSC3136BA2
ZSSC313xKITV1.1
Description
ZSSC3136 die – tested; temperature range -40 to +150 °C
ZSSC3136 die – tested; temperature range -40 to +125 °C
ZSSC3136 SSOP14 – temperature range -40 to +150 °C
ZSSC3136 SSOP14 – temperature range -40 to +125 °C
ZSSC313x Evaluation Kit, revision 1.1, including Evaluation Board,
ZSSC3136 IC samples, USB cable (software can be downloaded
from the product page www.IDT.com/ZSSC3136)
Package
Unsawn wafer: add “B” to sales code
Die on frame: add “C” to sales code
Unsawn wafer: add “B” to sales code
Die on frame: add “C” to sales code
Tube: add “T” to sales code
Tape & Reel: add “R”
Tube: add “T” to sales code
Tape & Reel: add “R”
Kit
ZSSC313x Mass Calibration
Modular Mass Calibration System (MSC) for ZSSC313x including
System V1.1
MCS boards, cable, connectors (software can be downloaded from
the product page
www.IDT.com/ZSSC3136)
Kit
Corporate Headquarters
6024 Silver Creek Valley Road
San Jose, CA 95138
www.IDT.com
Sales
µC
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.
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January 22, 2016
ZSSC3136 Datasheet
Contents
1
Electrical Characteristics ............................................................................................................................... 5
1.1. Absolute Maximum Ratings .................................................................................................................... 5
1.2. Operating Conditions .............................................................................................................................. 5
1.3. Electrical Parameters ............................................................................................................................. 6
1.3.1. Supply Current and System Operation Conditions .......................................................................... 6
1.3.2. Analog Front-End (AFE) Characteristics ......................................................................................... 6
1.3.3. Temperature Measurement ............................................................................................................. 6
1.3.4. A/D Conversion ................................................................................................................................ 7
1.3.5. Sensor Check................................................................................................................................... 7
1.3.6. DAC and Analog Output .................................................................................................................. 7
1.3.7. System Response ............................................................................................................................ 8
1.4. Interface Characteristics and EEPROM ................................................................................................. 9
TM
1.4.1. I²C Interface .................................................................................................................................. 9
1.4.2. ZACwire™ One-Wire Interface (OWI) ............................................................................................. 9
1.4.3. EEPROM .......................................................................................................................................... 9
Circuit Description ....................................................................................................................................... 10
2.1. Signal Flow ........................................................................................................................................... 10
2.2. Application Modes ................................................................................................................................ 11
2.3. Analog Front-End (AFE) ....................................................................................................................... 11
2.3.1. Programmable Gain Amplifier (PGA) ............................................................................................. 11
2.3.2. Offset Compensation ..................................................................................................................... 12
2.3.3. Measurement Cycle ....................................................................................................................... 12
2.3.4. Analog-to-Digital Converter ............................................................................................................ 13
2.4. Temperature Measurement .................................................................................................................. 14
2.5. System Control and Conditioning Calculation ...................................................................................... 14
2.5.1. General Working Modes ................................................................................................................ 14
2.5.2. Startup Phase ............................................................................................................................... 15
2.5.3. Conditioning Calculation ................................................................................................................ 15
2.6. Analog or Digital Output ....................................................................................................................... 16
2.7. Serial Digital Interface .......................................................................................................................... 16
2.8. Failsafe Features .................................................................................................................................. 16
2.9. High Voltage, Reverse Polarity, and Short Circuit Protection .............................................................. 17
Application Circuit Examples ....................................................................................................................... 18
Pin Configuration and Package ................................................................................................................... 20
ESD Protection ............................................................................................................................................ 21
Quality and Reliability .................................................................................................................................. 21
2
3
4
5
6
© 2016 Integrated Device Technology, Inc.
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January 22, 2016
ZSSC3136 Datasheet
7
8
9
10
11
Customization .............................................................................................................................................. 21
Ordering Information ................................................................................................................................... 21
Related Documents ..................................................................................................................................... 22
Glossary ...................................................................................................................................................... 22
Document Revision History ......................................................................................................................... 24
List of Figures
Figure 2.1
Figure 2.2
Figure 3.1
Figure 3.2
Figure 3.3
Figure 4.1
Block Diagram of the ZSSC3136 ................................................................................................... 10
Measurement Cycle with 1 Bridge Sensor Signal Measurement per Special Measurement ........ 12
Application with On-Chip Diode Temperature Sensor ................................................................... 18
Application with External Diode Temperature Sensor ................................................................... 19
Application with External Thermistor ............................................................................................. 19
ZSSC3136 SSOP14 Pin Diagram ................................................................................................. 20
List of Tables
Table 1.1
Table 1.2
Table 1.3
Table 1.4
Table 2.1
Table 2.2
Table 3.1
Table 4.1
Absolute Maximum Ratings ............................................................................................................. 5
Operating Conditions ....................................................................................................................... 5
Electrical Parameters ....................................................................................................................... 6
Interface Characteristics and EEPROM .......................................................................................... 9
Adjustable Gains, Resulting Sensor Signal Spans and Common Mode Ranges ......................... 11
ADC Resolution versus Output Resolution and Sample Rate ....................................................... 14
External Components for Application Circuit Examples ................................................................ 18
Pin Configuration and Definition .................................................................................................... 20
© 2016 Integrated Device Technology, Inc.
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January 22, 2016
ZSSC3136 Datasheet
1
1.1.
Electrical Characteristics
Absolute Maximum Ratings
Absolute Maximum Ratings
Parameter
Supply voltage
1)
Parameters apply in operation temperature range and without time limitations.
Table 1.1
No.
1.1.1
Symbol
VDDE
AMR
Conditions
To VSSE, refer to
section 3 for application
circuits
Referenced to VSSE
Referenced to VSSA,
VDDE - VDDA < 0.35V
Referenced to VSSA
Min
-33
Max
33
Unit
VDC
1.1.2
1.1.3
1.1.4
1.1.5
1)
Potential at AOUT pin
Analog supply voltage
1)
1)
V
OUT
VDDA
AMR
V
A_IO
V
D_IO
T
STG
-33
-0.3
-0.3
-55
33
6.5
VDDA + 0.3
150
VDC
VDC
VDC
°C
Voltage at all analog and
digital IO pins
Storage temperature
Refer to the
ZSSC313x Technical Note—High Voltage Protection
for specification and detailed conditions.
1.2.
Operating Conditions
Operating Conditions
Parameter
Ambient temperature
1) 2)
All voltages are referenced to VSSA.
Table 1.2
No.
1.2.1
Symbol
T
AMB_TQE
T
AMB_TQA
Conditions
Extended Temperature
Range (TQE)
Advanced-Performance
Temperature Range
(TQA)
Best-Performance
Temperature Range (TQI)
Min
-40
-40
Typ
Max
150
125
Unit
°C
°C
T
AMB_TQI
1.2.2
1.2.3
1)
2)
3)
4)
-25
4.5
2
5.0
85
5.5
25
°C
VDC
kΩ
Supply voltage
Bridge resistance
3) 4)
VDDE
R
BR
Maximum operation temperature range depends on product version (refer to section 8).
See the temperature profile description in the
ZSSC313x Technical Note Die & Package Dimensions.
No measurement in mass production, parameter is guaranteed by design and/or quality observation.
Symmetric behavior and identical electrical properties (especially the low pass characteristic) of both sensor inputs of the ZSSC3136 are required.
Unsymmetrical conditions of the sensor and/or external components connected to the sensor input pins of the ZSSC3136can generate a failure in
signal operation.
© 2016 Integrated Device Technology, Inc.
5
January 22, 2016
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