ZSSC3154BA1D datasheet, PDF - EEWORLD Datasheet

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ZSSC3154BA1D: DescriptionDICE (WAFER SAWN) - WAFFLE PACK; Categoryunclassified; File Size327KB，28 Pages; ManufacturerIDT (Integrated Device Technology, Inc.); Websitehttp://www.idt.com/

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Automotive Sensor Signal

Conditioner with Dual Analog Output

ZSSC3154

Datasheet

Brief Description

The ZSSC3154 is an integrated circuit for highly

accurate amplification and sensor-specific correction

of a bridge sensor signal. Up to two temperature

sensors can also be read in parallel.

The circuitry provides different configurations of the

analog outputs to show two measurement results

simultaneously. This also allows generating a com-

plementary bridge sensor signal, which is often a

requirement in safety-relevant applications.

The ZSSC3154 can measure and process two exter-

nal temperature sensors to compensate the temper-

ature drift of the bridge sensor signal and to output a

separate temperature signal.

An integrated calibration microcontroller with an on-

chip EEPROM performs the digital compensation of

the sensor offset, the sensitivity, the temperature

drift, and the nonlinearity of a sensor signal.

The single-pass, digital end-of-line calibration com-

bined with the integrated broken-chip detection sup-

ports automatic and highly efficient mass production.

Benefits

•

Bridge sensor signal validation for safety

applications via two antivalent analog outputs or

via half-bridge sensor measurement output

Simultaneous measurement of sensor signals,

including temperature signal for compensation

and for temperature output

Efficient use of non-calibrated elements for

bridge sensors and temperature sensors without

external trimming components

Single-pass end-of-line calibration algorithm

minimizes production costs

Excellent EMC/ESD robustness and AEC-Q100

qualification

Available Support

•

Evaluation Kit

Application Notes

Calculation Tools

Physical Characteristics

•

Features

•

ZSSC3154

•

Differential bridge sensor input

Half-bridge sensor or temperature sensor input

Digital compensation of offset, gain, nonlinearity,

and temperature dependency

Two analog outputs; behavior programmable by

EEPROM configuration

Sequential analog output mode provides two

measurement values at one output pin

On-chip diagnostic and safety features including

sensor connection diagnostic and broken-chip

detection

2 EEPROM words for arbitrary user data

Multiple configurable output options

Supply voltage: 4.5 to 5.5V

Maximum supply voltage: 7.7V

Input span: 1.8 to 267mV/V

ADC resolution: 14 bit

Output resolution: > 12 bit from 10% to 90%

Operating temperature range: -40°C to 150°C

Package: QFN32 (5x5mm; wettable flank) or die

ZSSC3154 Basic Circuit

DFBH

VTN2

VTN1

VDDA

VSSA

SDA

SCL

VDD

VDDE

VCC

AOUT1

AOUT2

GND

VBR_T

VBP

VBR_B

VBN

AOUT1

AOUT2

VSSE

January 22, 2016

ZSSC3154 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 Characteristics ....................................................................................................... 6

1.3.3

Temperature Measurement ................................................................................................................ 7

1.3.4

Sensor Diagnostic Tasks .................................................................................................................... 7

1.3.5

A/D Conversion ................................................................................................................................... 8

1.3.6

D/A Conversion and Analog Outputs (Pins AOUT1 and AOUT2) ...................................................... 8

1.3.7

System Response ............................................................................................................................... 9

1.4

Interface Characteristics and EEPROM .................................................................................................. 10

1.4.1

I2C Interface .................................................................................................................................. 10

1.4.2

ZACwire One Wire Interface .......................................................................................................... 10

1.4.3

EEPROM ........................................................................................................................................... 10

2 Circuit Description .......................................................................................................................................... 11

2.1

Signal Flow .............................................................................................................................................. 11

2.2

Application Modes ................................................................................................................................... 12

2.3

System Control ........................................................................................................................................ 13

2.3.1

Main System Tasks ........................................................................................................................... 13

2.3.2

General Working Modes ................................................................................................................... 13

2.4

Normal Operation Mode .......................................................................................................................... 13

2.4.1

Startup Phase ................................................................................................................................... 13

2.4.2

Measurement Cycle .......................................................................................................................... 14

2.4.3

Conditioning Calculation ................................................................................................................... 14

2.5

Bridge Sensor Measurement ................................................................................................................... 15

2.6

Temperature Measurement ..................................................................................................................... 15

2.7

Half-Bridge Sensor Measurement ........................................................................................................... 15

2.8

Analog Front End ..................................................................................................................................... 16

2.8.1

Programmable Gain Amplifier ........................................................................................................... 16

2.8.2

Offset Compensation ........................................................................................................................ 17

2.8.3

Analog-to-Digital Converter ............................................................................................................... 18

2.9

Signal Outputs ......................................................................................................................................... 18

2.9.1

Analog Output ................................................................................................................................... 18

2.9.2

Sequential Analog Output ................................................................................................................. 19

2.9.3

Digital Output .................................................................................................................................... 19

2.10 Serial Digital Interfaces ............................................................................................................................ 19

2.11 Failsafe Features ..................................................................................................................................... 20

January 22, 2016

ZSSC3154 Datasheet

2.12 Overvoltage and Short Circuit Protection ................................................................................................ 20

3 Application Circuits and External Components .............................................................................................. 21

3.1

Application Circuit Examples ................................................................................................................... 21

3.2

External Components .............................................................................................................................. 22

4 ESD Protection and EMC Specification ......................................................................................................... 22

5 Pin Configuration and Package ...................................................................................................................... 23

6 Reliability and RoHS Conformity .................................................................................................................... 25

7 Ordering Information ...................................................................................................................................... 25

8 Related Documents ........................................................................................................................................ 25

9 Glossary ......................................................................................................................................................... 26

10 Document Revision History ............................................................................................................................ 27

List of Figures

Figure 2.1

Figure 2.2

Figure 2.3

Figure 3.1

Figure 3.2

Figure 5.1

Block Diagram of the ZSSC3154 ...................................................................................................... 11

Example of Measurement Cycle with Bridge Sensor Signal and Temperature Measurement ........ 14

Sequential Analog Output—Example Sequence if the DFBH Pin is Unconnected .......................... 19

Application Circuit with Two Analog Outputs and Diagnostic Fault Band Level Low ....................... 21

Application Circuit with Two Analog Outputs and Diagnostic Fault Band Level High ...................... 21

Pin Map and Pad Position of the ZSSC3154 .................................................................................... 24

List of Tables

Table 1.1

Table 1.2

Table 1.3

Table 1.4

Table 2.1

Table 2.2

Table 2.3

Table 3.1

Table 5.1

Absolute Maximum Ratings ................................................................................................................ 5

Operating Conditions .......................................................................................................................... 5

Electrical Parameters .......................................................................................................................... 6

Interface Characteristics and EEPROM ........................................................................................... 10

Adjustable Gains and Resulting Sensor Signal Spans and Common Mode Ranges ...................... 16

Extended Analog Offset Compensation Ranges (XZC) ................................................................... 17

ADC Resolution versus Output Resolution and Sample Rate .......................................................... 18

Dimensioning of External Components for the Application Examples ............................................. 22

Pin Configuration .............................................................................................................................. 23

January 22, 2016

ZSSC3154BA1D Related Products

	ZSSC3154BA1D	ZSSC3154BE1B	ZSSC3154BE1C	ZSSC3154BA1B	ZSSC3154BA1C	ZSSC3154BA3R	ZSSC3154BA3V	ZSSC3154BE3R	ZSSC3154BE3V	ZSSC3154BE1D
Description	DICE (WAFER SAWN) - WAFFLE PACK	WAFER (UNSAWN) - BOX	DICE (WAFER SAWN) - FRAME	WAFER (UNSAWN) - BOX	DICE (WAFER SAWN) - FRAME	SENSOR SIGNAL CONDITIONER	SENSOR SIGNAL CONDITIONER	SENSOR SIGNAL CONDITIONER	SENSOR SIGNAL CONDITIONER	DICE (WAFER SAWN) - WAFFLE PACK

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