ZMD31050AF-S datasheet, PDF - EEWORLD Datasheet

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ZMD31050AF-S: DescriptionAnalog Circuit, 1 Func, CMOS, PDSO16; CategoryAnalog mixed-signal IC The signal circuit; File Size531KB，46 Pages; ManufacturerIDT (Integrated Device Technology)

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ZMD31050AF-S Overview

Analog Circuit, 1 Func, CMOS, PDSO16

ZMD31050AF-S Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	IDT (Integrated Device Technology)
package instruction	SOP,
Reach Compliance Code	compliant
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT
JESD-30 code	R-PDSO-G16
JESD-609 code	e0
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	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	240
Certification status	Not Qualified
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 location	DUAL
Maximum time at peak reflow temperature	30

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ZMD31050

Advanced Differential Sensor Signal Conditioner

Functional Description

Preliminary

ZMD31050

Advanced Differential Sensor Signal Conditioner

Functional Description

Rev. 0.82, Preliminary

This Revision is not valid for earlier revisions than ZMD31050C*.

For parts identification refer ZMD31050 Development Status Report.

1/46

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

ZMD31050

Advanced Differential Sensor Signal Conditioner

Functional Description

Preliminary

1.1

CONTROL LOGIC

General Description

The control logic of the ZMD31050 consists of the Calibration Micro-Controller (CMC) and the modules

control logic of the A/D-Converter, Control logic of the digital Ports, PWM and serial digital Interface.

The configuration of the various modes of the device is done by programming an EEPROM.

The Calibration Micro-Controller controls the measurement cycle and realizes the calculations for

sensor signal conditioning. This eliminates the gain deviation, the offset, the temperature deviation and

the non-linearity of the pre-amplified and A/D-converted sensor signal.

The communication of the ZMD31050 with an external micro-controller especially for calibration

purposes is done via a serial digital interface. Communication protocols according to I

C and SPI

standard are supported. Additionally an one wire interface is implemented. These serial interfaces are

used for the calibration of the sensor system consisting of transducer and ZMD31050.

Furthermore the serial interface makes available the read out of the results of sensor signal

conditioning as digital values during the calibration or during the Normal Operation Mode for

processing by an external micro-controller. The internal processing of received interface commands is

done by the CMC. As a consequence the measurement cycle is interrupted if a command is received.

Only the read out of data is controlled by the serial interface itself and does not interrupt the CMC.

The controller of the A/D-conversion is started by the CMC. It generates a clock for the A/D-converter

(switched capacitor technique), the chopper clock for the analog front end and executes a continuous

measurement cycle. The result of the A/D-conversion is a counter value, which is read and processed

after a synchronization signal which is generated after every measurement. The processing of the

conditioning calculation by the CMC works parallel to the A/D-conversion.

The output of the conditioning result can be done via various channels: analog voltage output,

(4 to 20) mA current loop, PWM. Additionally there are two digital output ports with programmable

threshold, hysteresis and delay.

1.2

CMC Description

The

Calibration Micro-Controller

(CMC) is especially adapted to the tasks connecting with the signal

conditioning. The main features are:

•

Processing width 16 Bit

•

Programmed via ROM

Constants/coefficients for the conditioning calculation are stored in the EEPROM. After power-on

or after re-initialization from EEPROM by sending a certain command to the serial interface the

EEPROM is mirrored to the RAM.

Continuous parity-check during every read from RAM. If incorrect data is detected, an error mode

is started (error code is written to the serial digital output, the analog out is set to diagnostic

mode).

The conditioning calculation is done with 16 Bit saturation arithmetic, i.e. if an overflow occurs in

any calculation the result is fixed to the maximum of the defined 16Bit range. The sign is

preserved.

•

3/46

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

ZMD31050

Advanced Differential Sensor Signal Conditioner

Functional Description

Preliminary

1.3

General Working Modes

Open Mode

Reduced command set

START_CM

START_OM

Command Mode

Full command set

START_NOM

Normal Operation Mode

Reduced command set

Fig. 1

1.3.1

Modes of digital serial interface

Normal Operation Mode

The “Normal Operation Mode” (NOM) is the working mode in which the signal condition operation is

done. After power-on the ZMD31050 starts with an initialization routine, which also can be started by

sending a certain command via the serial digital interface at any time. First the EEPROM is mirrored to

the RAM, thereby the EEPROM contents are checked. If an error is detected, the “Command Mode” is

started, the analog output is shifted in the diagnose range and an error code can be read via the digital

interface. Furthermore the configuration of the ZMD31050 is set during initialization. This configuration

evaluates all the configuration data stored in the EEPROM, e.g. measurement cycle, signal output

mode, mode of digital serial interface etc.. After the initialization the continuous measurement cycle,

the conditioning calculation and the output via various channels starts. Provided that the EEPROM is

programmed correct, this mode works without sending any command to the digital serial interface.

1.3.2

Command Mode

The ZMD31050 changes to “Command Mode” (CM) after receiving a correct command via the digital

serial interface. This command generates an interrupt for the CMC, the measurement cycle is stopped

and the called command routine is processed. During processing the serial interface is disabled, no

further commands are recognized. After finishing the routine the CMC waits for further commands. It is

also possible to start the NOM by using the current contents of EEPROM or RAM.

1.3.3

Digital Serial Interface

Regarding the digital serial interface 3 modes are distinguished: the “Open Mode” (OM), the “Normal

Operation Mode” (NOM) and the “Command Mode” (CM). In OM and NOM only a reduced set of

commands is available. For all commands which change the configuration of the ZMD31050 (write to

EEPROM/RAM, start different measurement cycle) the ZMD31050 has to be previously transferred to

CM. This protects the ZMD31050 against unintentional configurations.

After power-on the ZMD31050 starts in Open Mode. Every command sent to the digital serial interface

transfers the ZMD31050 to the Normal Operation Mode except the command START_CM, which starts

the CM. The command START_CM is only processed if it is received as first command after power-on

via digital serial interface. Is the ZMD31050 once changed to NOM, this mode can only be reset by a

new power-on. The ZMD31050 leaves the CM by receiving the commands START_OM or

START_NOM or by reset due to power-on.

4/46

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

ZMD31050AF-S Related Products

	ZMD31050AF-S	ZMD31050AF-T	ZMD31050AF-R
Description	Analog Circuit, 1 Func, CMOS, PDSO16	Analog Circuit, 1 Func, CMOS, PDSO16	Analog Circuit, 1 Func, CMOS, PDSO16
Is it Rohs certified?	incompatible	incompatible	incompatible
Maker	IDT (Integrated Device Technology)	IDT (Integrated Device Technology)	IDT (Integrated Device Technology)
package instruction	SOP,	SOP,	SOP,
Reach Compliance Code	compliant	compliant	compliant
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT
JESD-30 code	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16
JESD-609 code	e0	e0	e0
Humidity sensitivity level	3	3	3
Number of functions	1	1	1
Number of terminals	16	16	16
Maximum operating temperature	125 °C	125 °C	125 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	SOP	SOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	240	240	240
Certification status	Not Qualified	Not Qualified	Not Qualified
Maximum supply voltage (Vsup)	5.5 V	5.5 V	5.5 V
Minimum supply voltage (Vsup)	2.7 V	2.7 V	2.7 V
surface mount	YES	YES	YES
technology	CMOS	CMOS	CMOS
Temperature level	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE
Terminal surface	TIN LEAD	TIN LEAD	TIN LEAD
Terminal form	GULL WING	GULL WING	GULL WING
Terminal location	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	30	30	30

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