ZSSC3135BA1C datasheet, PDF - EEWORLD Datasheet

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ZSSC3135BA1C: DescriptionDICE (WAFER SAWN) - FRAME; Categoryunclassified; File Size274KB，23 Pages; ManufacturerIDT (Integrated Device Technology, Inc.); Websitehttp://www.idt.com/

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Sensor Signal Conditioner for

Piezoresistive Bridge Sensors

ZSSC3135

Datasheet

Brief Description

The ZSSC3135 is a member of the ZSSC313x

family of CMOS integrated circuits designed for

automotive/industrial sensor applications. All family

members are well suited for highly accurate amp-

lification 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 ZSSC3135 is specially designed for piezo-

resistive bridge sensor elements. The amplification

stage with an analog gain of 105 in combination with

optional temperature compensation via an external

temperature sensor meets or exceeds the require-

ments of piezoresistive sensor applications.

Benefits

•

Family approach offers the best fitting IC selec-

tion to build cost-optimized applications

No external trimming components required

Low number of external components needed

PC-controlled configuration and one-pass/

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 environments

due to robust protection circuitries, excellent

electromagnetic compatibility and AEC-Q100

qualification

Available Support

•

Features

•

Evaluation Kits

Application Notes

Mass Calibration System

•

Adjustable to nearly all resistive bridge sensor

types: analog gain of up to 105, maximum overall

gain of 420

Sample rate up to 200 Hz

ADC resolution 13/14 bit

Safety functionality sensor connection

External temperature sensor

Digital compensation of sensor offset, sensitivity,

temperature drift, and non-linearity

Output options: ratiometric analog voltage output

(5 - 95% maximum, 12.4 bit resolution) or

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 range:

-40 to +150°C

Traceability by user-defined EEPROM entries

* Note: I

C™ is a trademark of NXP.

** FSO = Full Scale Output.

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

ZSSC3135 Minimum Application Requirements

VCC

Sensor

Module

ZSSC3135

OUT

GND

January 27, 2016

ZSSC3135 Datasheet

Contents

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

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 ............................................................................................................................... 14

2.5.3. Conditioning Calculation ................................................................................................................ 15

2.6. Analog or Digital Output ....................................................................................................................... 15

2.7. Serial Digital Interface .......................................................................................................................... 16

2.8. Failsafe Features .................................................................................................................................. 16

2.9. High Voltage, Reverse Polarity, and Short Circuit Protection .............................................................. 16

Application Circuit Examples ....................................................................................................................... 17

Pin Configuration and Package ................................................................................................................... 19

ESD Protection ............................................................................................................................................ 20

Quality and Reliability .................................................................................................................................. 20

Customization .............................................................................................................................................. 20

Ordering Information ................................................................................................................................... 20

Related Documents ..................................................................................................................................... 21

January 27, 2016

ZSSC3135 Datasheet

10 Glossary ...................................................................................................................................................... 21

11 Document Revision History ......................................................................................................................... 23

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 ZSSC3135 ................................................................................................... 10

Measurement Cycle with 1 Bridge Sensor Signal Measurement per Special Measurement ........ 12

Application with On-Chip Diode Temperature Sensor ................................................................... 17

Application with External Diode Temperature Sensor ................................................................... 18

Application with External Thermistor ............................................................................................. 18

ZSSC3135 SSOP14 Pin Diagram ................................................................................................. 19

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 ................................................................ 17

Pin Configuration and Definition .................................................................................................... 19

January 27, 2016

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