ZMD31020
Sensor Signal Conditioner
Datasheet
Features
•
Digital compensation of sensor offset, sensitivity,
temperature drift and non-linearity
•
Adjustable to nearly all piezo-resistive bridge
sensor types
•
Digital one-shot calibration: quick and precise
•
Selectable temperature compensation reference:
internal or external diode
•
Output options: 0...5V analog ratiometric voltage
2
or 12 bit digital I C interface
•
Product traceability by user-defined EEPROM
entries
•
Operation temperature range, depending on
product version, up to –40...+125°
C
•
Supply voltage +4.5...+5.5V
•
Sampling rate
≥100Hz
•
Available in SSOP14 or as die
Brief Description
ZMD31020 is a CMOS integrated circuit for highly-
accurate amplification and sensor-specific correction
of bridge sensor signals. The device provides digital
compensation
of
sensor
offset,
sensitivity,
temperature drift and non-linearity by a 16-bit RISC
micro controller running a correction algorithm.
ZMD31020 accommodates nearly all piezo-resistive
bridge sensor types.
2
The bi-directional digital I C interface can be used for
a
simple
PC-controlled
one-shot
calibration
procedure, in order to program a set of calibration
coefficients into an on-chip EEPROM. Thus a specific
sensor and a ZMD31020 are mated digitally: fast,
precise and without the cost overhead associated with
trimming by external devices or laser.
ZMD31020 has been designed for industrial and
consumer applications and is specifically suited for
most pressure sensors.
§
Demo kit available (incl. calibration PCB,
SSOP14 samples, software, technical
documentation)
§
Support for industrial 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 to 85°
C;
±0.25% FSO @ -40 to 125°C)
Application Circuit Example
Copyright © 2004, ZMD AG, Rev. 1.6, 2005-05-19
1/19
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 preliminary and subject to changes without notice.
ZMD [ Zentrum Mikroelektronik Dresden AG ]
