ZSSC3036

Low-Power 16-Bit Sensor Signal Conditioner IC

Data Sheet

May 28, 2013

© 2013 Zentrum Mikroelektronik Dresden AG

— Rev. 1.20

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

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MTP

Address

Word / Bit

Range

Default

Setting

Description

Notes / Explanations

Not assigned

Not assigned

Not assigned

15:0

-

ChecksumC

Generated (checksum) for user page through a

linear feedback shift register (LFSR); signature is

checked with power-up to ensure memory content

integrity

The memory integrity checksum (referred to as CRC) is generated through a linear feedback shift register with the

polynomial:

g(x) = x

3.7.

Calibration Sequence

Calibration essentially involves collecting raw signal and temperature data from the sensor-IC system for different

known bridge values and temperatures. This raw data can then be processed by the calibration master (assumed

to be a PC), and the calculated calibration coefficients can then be written to MTP memory. Below is a brief

overview of the steps involved in calibrating the ZSSC3036.

There are three main steps to calibration:

1.

Assigning a unique identification to the ZSSC3036. This identification is written to shadow RAM and later

programmed in MTP memory. This unique identification can be stored in the two 16-bit registers

dedicated to customer ID. It can be used as an index into a database stored on the calibration PC. This

database will contain all the raw values of bridge readings and temperature readings for that part, as well

as the known bridge measurand conditions and temperature to which the bridge was exposed.

2.

Data collection. Data collection involves getting uncorrected or raw data from the bridge at different

known measurand values and temperatures. Then this data is stored on the calibration PC using the

unique identification of the device as the index to the database.

3.

Coefficient calculation and storage in MTP memory. After enough data points have been collected to

calculate all the desired coefficients, the coefficients can be calculated by the calibrating PC and written

to the shadow RAM. After that, MTP memory is programmed with the contents of the shadow RAM.

4.

Result. The sensor signal and the characteristic temperature effect on output will be linearized according

to the setup-dependent maximum output range.

It is essential to perform the calibration with a fixed programming setup during the data collection phase. In order

to prevent any accidental misprocessing, it is further recommended to keep the MTP memory setup stable during

the whole calibration process as well as in the subsequent operation. A ZSSC3036 calibration only fits the single

setup used during its calibration. Changes of functional parameters after a successful calibration can decrease

the precision and accuracy performance of the ZSSC3036 as well as of the whole application.