ZSC31050FEC datasheet, PDF - EEWORLD Datasheet

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Advanced Differential

Sensor Signal Conditioner

Brief Description

ZSC31050 is a CMOS integrated circuit for highly accurate amp-

lification and sensor-specific correction of bridge sensor and

temperature sensor signals. The device provides digital com-

pensation of sensor offset, sensitivity, temperature drift, and non-

linearity via a 16-bit RISC microcontroller running a polynomial

correction algorithm.

The ZSC31050 accommodates virtually any bridge sensor type

(e.g., piezo-resistive, ceramic thick-film, or steel membrane

based). In addition, it can interface to a separate temperature

sensor. The bi-directional digital interfaces (I

C, SPI, and

ZACwire™) can be used for a simple PC-controlled one-pass

calibration procedure to program a set of calibration coefficients

into an on-chip EEPROM. A specific sensor and a ZSC31050 can

be mated digitally: fast, precise, and without the cost overhead

associated with trimming by external devices or laser. The

ZACwire™ interface enables an end-of-line calibration of the

sensor module.

Typical applications for the ZSC31050 include industrial, medical,

and consumer products. It is specifically engineered for most

resistive bridge sensors; e.g., sensors for measuring pressure,

force, torque, acceleration, angle, position, and revolution.

ZSC31050

Datasheet

Features



Digital compensation of sensor offset, sensitivity, temperature

drift, and nonlinearity

Accommodates nearly all resistive bridge sensor types (signal

spans from 1mV/V up to 275mV/V)

Digital one-pass calibration: quick and precise

Selectable compensation temperature source: bridge,

thermistor, or internal or external diode

Output options: voltage (0 to 5V), current (4 to 20mA), PWM,

C, SPI, ZACwire™ (one-wire interface), alarm

Adjustable output resolution (up to 15 bits) versus sampling

rate (up to 3.9kHz)

Current consumption: 2.5mA (typical)

Selectable bridge excitation: ratiometric voltage, constant

voltage, or constant current

Input channel for separate temperature sensor

Sensor connection and common mode check (sensor aging

detection)

AEC-Q100 qualification (temperature grade 0)

Physical Characteristics

Benefits

No external trimming components required



PC-controlled configuration and calibration via digital bus

interface – simple, low cost



High accuracy (±0.1% FSO @ –25 to 85°C;

±0.25% FSO @ –40 to 125°C) *



Operation temperature -40°C to +125°C (-40°C to +150°C

de-rated, depending on product version)



Supply voltage: 2.7V to 5.5V;

with external JFET: 5V to 48 V



Available in 16-SSOP package or as die



Basic Circuit Diagram

Available Support

Evaluation kit available



Support for industrial mass calibration available



Quick circuit customization possible for large production

volumes



Sensor

Module

VCC

ZSC31050

OUT

GND

* Digital output signal.

February 13, 2017

ZSC31050 Datasheet

Contents

Electrical Characteristics ..............................................................................................................................................................................5

1.1

1.2

1.3

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

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

Inherent Characteristics .....................................................................................................................................................................7

1.3.1

1.3.2

1.4

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7

1.5

1.5.1

1.5.2

2.1

2.2

2.3

Cycle Rate versus ADC Resolution ....................................................................................................................................8

PWM Frequency .................................................................................................................................................................8

Supply / Regulation ..............................................................................................................................................................9

Analog Front End ................................................................................................................................................................9

DAC and Analog Output (OUT Pin) ....................................................................................................................................9

PWM Output (OUT Pin, IO1 Pin) ........................................................................................................................................9

Temperature Sensors (IR_TEMP Pin) ................................................................................................................................9

Digital Outputs (IO1, IO2, OUT Pins in Digital Mode) .......................................................................................................10

System Response .............................................................................................................................................................10

Multiport Serial Interfaces (I

C, SPI) .................................................................................................................................11

One-Wire Serial Interface (ZACwire™) .............................................................................................................................11

Electrical Parameters .........................................................................................................................................................................9

Interface Characteristics ..................................................................................................................................................................11

Circuit Description ......................................................................................................................................................................................12

Signal Flow ......................................................................................................................................................................................12

Application Modes ............................................................................................................................................................................13

Analog Front-End (AFE)...................................................................................................................................................................14

2.3.1

2.3.2

2.3.3

2.3.4

2.4

2.5

Programmable Gain Amplifier (PGA) ................................................................................................................................14

Extended Zero Point Compensation (XZC).......................................................................................................................14

Measurement Cycle Performed by Multiplexer .................................................................................................................16

Analog-to-Digital Converter ...............................................................................................................................................16

System Control ................................................................................................................................................................................18

Output Stage ....................................................................................................................................................................................18

2.5.1

2.5.2

2.5.3

Analog Output ...................................................................................................................................................................20

Comparator Module (ALARM Output) ...............................................................................................................................20

Serial Digital Interface .......................................................................................................................................................20

2.6

2.7

Voltage Regulator ............................................................................................................................................................................21

Watchdog and Error Detection .........................................................................................................................................................21

Application Circuit Examples ......................................................................................................................................................................22

ESD/Latch-Up-Protection ...........................................................................................................................................................................23

Pin Configuration and Package ..................................................................................................................................................................24

Reliability ....................................................................................................................................................................................................25

Customization .............................................................................................................................................................................................25

Ordering Information...................................................................................................................................................................................26

Related Documents ....................................................................................................................................................................................26

February 13, 2017

ZSC31050 Datasheet

10. Glossary .....................................................................................................................................................................................................27

11. Document Revision History ........................................................................................................................................................................28

List of Figures

Figure 1. Block Diagram of the ZSC31050 .......................................................................................................................................................12

Figure 2. Measurement Cycle ZSC31050 ........................................................................................................................................................16

Figure 3. Application Example 1 .......................................................................................................................................................................22

Figure 4. Application Example 2 .......................................................................................................................................................................22

Figure 5. Application Example 3 .......................................................................................................................................................................22

Figure 6. Application Example 4 .......................................................................................................................................................................22

Figure 7. Application Example 5 .......................................................................................................................................................................23

Figure 8. Pin Configuration ...............................................................................................................................................................................25

List of Tables

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Adjustable Gains, Resulting Sensor Signal Spans, and Common Mode Ranges .............................................................................14

Extended Zero Point Compensation (XZC) Range............................................................................................................................15

Output Resolution versus Sample Rate.............................................................................................................................................17

Output Configurations Overview ........................................................................................................................................................18

Analog Output Configuration .............................................................................................................................................................20

Pin Configuration ...............................................................................................................................................................................24

February 13, 2017

ZSC31050FEC Related Products

	ZSC31050FEC	ZSC31050FEG1-T	ZSC31050FIG1-T	ZSC31050FAG1-R	ZSC31050FAC	ZSC31050FAB	ZSC31050FEB
Description	Integrated Device Technology Dice (Wafer sawn) - frame	Sensor Interface Adv Diff Sensor Signal Conditioner	Sensor Interface Adv Diff Sensor Signal Conditioner	Sensor Interface Adv Diff Sensor Signal Conditioner	Integrated Device Technology Dice (Wafer sawn) - frame	Integrated Device Technology Wafer (unsawn) - box	Integrated Device Technology Wafer (unsawn) - box
Product Attribute	Attribute Value	-	-	-	Attribute Value	Attribute Value	Attribute Value
Manufacturer	IDT (Integrated Device Technology)	-	-	-	IDT (Integrated Device Technology)	IDT (Integrated Device Technology)	IDT (Integrated Device Technology)
Product Category	Integrated Device Technology	-	-	-	Integrated Device Technology	Integrated Device Technology	Integrated Device Technology

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