ZMD31050 datasheet, PDF - EEWORLD Datasheet

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ZMD31050: DescriptionAnalog Circuit, 1 Func, CMOS, PDSO16, 5.30 MM, 0.65 MM PITCH, SSOP-16; CategoryAnalog mixed-signal IC The signal circuit; File Size382KB，23 Pages; ManufacturerZentrum Mikroelektronik Dresden AG (IDT)

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ZMD31050 Overview

Analog Circuit, 1 Func, CMOS, PDSO16, 5.30 MM, 0.65 MM PITCH, SSOP-16

ZMD31050 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Zentrum Mikroelektronik Dresden AG (IDT)
Parts packaging code	SOIC
package instruction	SSOP,
Contacts	16
Reach Compliance Code	compliant
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT
JESD-30 code	R-PDSO-G16
JESD-609 code	e0
length	6.2 mm
Humidity sensitivity level	3
Number of functions	1
Number of terminals	16
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Certification status	Not Qualified
Maximum seat height	1.99 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.7 V
surface mount	YES
technology	CMOS
Temperature level	AUTOMOTIVE
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	5.29 mm

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ZMD31050 RB

series

Advanced Differential Sensor Signal Conditioner

Datasheet

Features

•

Digital compensation of sensor offset, sensitivity,

temperature drift and non-linearity

Accommodates nearly all bridge sensors by PGA

and programmable ADC

Capable with sensor signals from 1 up to

275mV/V span

Sensor connections check and aging detection

Selectable temperature compensation reference:

bridge, thermistor, internal diode or external diode

Output options: voltage (0...5V), current

(4...20mA), PWM, I

C, SPI, ZACwire

(one-wire-

interface), alarm

Adjustable output resolution (up to 15 bits) versus

sampling rate (up to 3.9kHz)

Selectable bridge excitation: ratiometric voltage,

constant voltage or constant current

Input channel for separate temperature sensor

Operation temperature -40...+125°C

(-50...+150°C derated)

Supply voltage +2.7V...+5.5V

Available in SSOP16 or as die

PRELIMINARY

Brief Description

The ZMD31050 is a CMOS integrated circuit that

belongs to ZMD’s RB

series. It performs highly-

accurate amplification/scaling and sensor-specific

correction of bridge sensor signals.

Digital compensation of sensor offset, sensitivity,

temperature drift and non-linearity is accomplished via

a 16-bit RISC micro-controller running a correction

algorithm with calibration coefficients stored in non-

volatile EEPROM.

The ZMD31050 accommodates virtually any bridge

sensor (e.g. piezo-resistive, ceramic-thickfilm or steel

membrane based). In addition, the IC can interface a

separate temperature sensor.

The bi-directional digital interfaces (I

C, SPI,

ZACwire

) can be used for a simple PC-controlled

calibration, in order to program a set of calibration

coefficients into an on-chip EEPROM. Thus a specific

sensor and a ZMD31050 are mated digitally: fast,

precise and without the cost overhead associated with

laser trimming, or mechanical potentiometer methods.

Application kit available (SSOP16 samples,

calibration PCB, calibration software, technical

documentation)

Support for industrial mass calibration

available

Quick circuit customization possible for large

production volumes

Benefits

•

No external trimming components required

PC-controlled configuration and calibration via

digital bus interface - simple, low cost

High accuracy (±0.1% FSO @ -25...85°C; ±0.25%

FSO @ -40...125°C)

Application Circuit (Examples)

Fig.1: Ratiometric measurement with voltage output,

temperature compensation via external diode

Fig.2: Two wire 4...20mA (5...40V) configuration.

Temperature compensation via internal diode

1/23

written consent of the copyright owner. The Information furnished in this publication is preliminary and subject to changes without notice.

ZMD31050 RB

series

Advanced Differential Sensor Signal Conditioner

Datasheet

PRELIMINARY

Contents

CIRCUIT DESCRIPTION ..............................................................................................................3

1.1 S

IGNAL

LOW

..............................................................................................................................3

1.2 A

PPLICATION

ODES

...................................................................................................................4

1.3 A

NALOG

RONT

(AFE) .........................................................................................................5

1.3.1. Programmable Gain Amplifier .............................................................................................5

1.3.2. Measurement Cycle Realized by Multiplexer ......................................................................5

1.3.3. Analog Offset Compensation ..............................................................................................6

1.3.4. Analog-to-Digital Converter .................................................................................................6

1.4 S

YSTEM

ONTROL

.......................................................................................................................8

1.5 O

UTPUT

TAGE

...........................................................................................................................9

1.5.1. Serial Digital Interface .......................................................................................................10

1.5.2. ZACwire

Single Wire Digital Interface ............................................................................10

1.5.3. Analog Output ...................................................................................................................12

1.5.4. Comparator Module (ALARM Output) ...............................................................................13

1.6 V

OLTAGE

EGULATOR

...............................................................................................................13

1.7 E

RROR

ETECTION

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

APPLICATION CIRCUIT EXAMPLES........................................................................................15

ESD/LATCH-UP-PROTECTION.................................................................................................15

PIN CONFIGURATION AND PACKAGE ...................................................................................16

IC CHARACTERISTICS .............................................................................................................17

5.1 A

BSOLUTE

AXIMUM

ATINGS

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

5.2 O

PERATING

ONDITIONS

OLTAGES RELATED TO

VSS) ........................................................17

5.3 B

UILD

HARACTERISTICS

.......................................................................................................18

5.3.8 Cycle Rate versus A/D-Resolution ........................................................................................19

5.3.9 PWM Frequency....................................................................................................................19

5.4 E

LECTRICAL

ARAMETERS

OLTAGES RELATED TO

VSS)......................................................20

5.5 I

NTERFACE

HARACTERISTICS

...................................................................................................21

10.

TEST ...........................................................................................................................................22

RELIABILITY ..............................................................................................................................22

CUSTOMIZATION ......................................................................................................................22

RELATED DOCUMENTS ...........................................................................................................22

ORDERING INFORMATION.......................................................................................................23

2/23

written consent of the copyright owner. The Information furnished in this publication is preliminary and subject to changes without notice.

ZMD31050 RB

series

Advanced Differential Sensor Signal Conditioner

Datasheet

PRELIMINARY

Dependent on the programmed output configuration the corrected sensor signal is output as analog

value, as PWM signal or in digital format (SPI, I

ZACwire

). The output signal is provided at 2

flexible I/O modules (FIO) and at the serial interface (SIF). The configuration data and the correction

parameters can be programmed into the EEPROM via the digital interfaces.

The modular circuit concept enables fast custom designs varying these blocks and, as a result,

functionality and die size.

1.2

Application Modes

For each application a configuration set has to be established (generally prior to calibration) by

programming the on-chip EEPROM regarding to the following modes:

−

Sensor channel

Sensor mode: ratiometric voltage or current supply mode.

Input range: The gain of the analog front end has to be chosen with respect to the maximum

sensor signal span and the zero point of the ADC has to be set with respect to the possible input

voltage range

Additional offset compensation: The extended analog offset compensation has to be enabled if

required, e.g. if the sensor offset voltage is near to or larger than the sensor span.

Resolution/response time: The A/D converter has to be configured for resolution and converting

scheme (first or second order). These settings influence the sampling rate, signal integration time

and this way the noise immunity

Sample order: The order and interval of multiplexed measurements (pressure, temperature, auto

zero) has to be set

Analog output

Choice of output method (voltage value, current loop, PWM) for output register 1.

Optional choice of additional output register 2: PWM module via IO1 or alarm out module via

IO1/2.

Digital communication: The preferred protocol and its parameter have to be set.

Temperature

The temperature measure channel for the temperature correction has to be chosen.

Optional: the temperature measure channel as the second output has to be chosen.

Supply voltage : For non-ratiometric output the voltage regulation has to be configured.

−

Note:

Not all possible combinations of settings are allowed (see section 1.5).

The calibration procedure must include

−

the set of coefficients of calibration calculation

and depending on configuration,

−

the adjustment of the extended offset compensation,

−

the zero compensation of temperature measurement,

−

the adjustment of the bridge current

and if necessary

−

the set of thresholds and delays for the alarms,

−

the reference voltage.

4/23

written consent of the copyright owner. The Information furnished in this publication is preliminary and subject to changes without notice.

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