Features two ZMD31010
Separate digital compensation of sensor offset, sensitivity,
temperature coefficient and non-linearity
Accommodates differential sensor signal spans from 1.2mV/V
to 60mV/V for two inputs
Dual ZACwire
TM
one-wire interface
Internal temperature compensation reference
via bandgap PTAT*
Optional sequential output of both temperature and bridge
readings two ZACwire
TM
digital output
Output options: ratiometric analog voltage, absolute analog
voltage, digital one-wire-interface
Supply voltage 2.7V to 5.5V, with external JFET 5.5V to 30V
Current consumption 2mA
Operation temperature -50C to +150C
Fast response time: 1ms
High voltage protection up to 30V with external JFET
Chopper stabilized true differential ADC
Buffered and chopper stabilize output DAC
*Proportional to absolute temperature
ZMD31010 Development Kit can be used
Support for industrial mass calibration will be available
Quick circuit customization possible for large production volumes
Application Circuit
Benefits
The ZMD31012 combines the benefits of two single ZMD31010.
No external trimming components required
PC-controlled configuration and calibration via one-wire interface
simple, low cost
High accuracy (0.1% FSO @ -25C to 85C;
0.25% FSO @ -40C to 125C)
Single pass calibration quick and precise
Due to the two independent channels the ZMD31012 provides
a perfect fit for the following selected samples:
Applications that require redundancy
Measurement of differential pressure
Flow Sensors
Brief Description
The ZMD31012 consists of two ZMD31010 dies in a standard
SSOP14 packages. ZMD31012 is a CMOS integrated circuit, which
enables easy and precise calibration of resistive bridge sensors via
EEPROM. When mated to a resistive bridge sensor, it will digitally
correct offset and gain with the option to correct offset and gain
coefficients and linearity over temperature. A second compensa-
tion can be enabled for temperature coefficients of gain or offset
or bridge linearity. ZMD31012 communicates via ZMD's ZACwire
TM
serial interface to the host computer and is easily mass calibrated in
a Windows
environment.
Once calibrated, the output SIG
TM
pin can provide selectable 0V to
1V, rail-to-rail ratiometric analog output, or digital serial output of
bridge data with optional temperature data.
The
Analog
Mixed Signal Company
ZMD31012
RBic
2
Lite
TM
Two Low-cost Sensor Signal Conditioners
ZMD31010 Chips in One Package
P R E L I M I N A RY
www.zmd.biz
ZMD AG 2006 Rev. 0.1 Preliminary
Application Examples
Ordering Code
Airflow
Differential Pressure
Process Control
Redundancy
Process Control
Dataloggers
Filter Check
Refrigerant
Pressure Monitoring
Appliances
Automotive
ZMD Product Sales Name
* only for serial parts; engineering samples don't have this character
** only for finished parts in plastic package
Engineering samples can be marked with the additional characters "ES".
Not all possible product versions are available. Please ask ZMD sales
if and when a certain product version is available.
Example:
Z M D 3 1 0 1 2 B I F - T
Delivery Form**
T = delivery in tube
R = delivery in tape on reel
S = special (e.g. sample box)
Die/Package Options
B = tested dice on unsawn wafer
C = tested dice on frame
D = tested dice in waffle pack
F = finished parts in plastic package
G1 = finished parts in "green" plastic package
(lead-free terminals pure Sn)
Target Application Area/
Usual Operating Temperature Range*
I = Industrial (-40C to +125C)
E = Extended automotive (-50C to +150C)
Design Revision
A = first design revision
B = second design revision
etc.
For further
information:
ZMD AG
Grenzstrasse 28
01109 Dresden
Germany
Tel +49.351.8822.366
Fax +49.351.8822.337
sales@zmd.de
ZMD America, Inc.
201 Old Country Road, Suite 204
Melville, NY 11747
USA
Tel +1.631.549.2666
Fax +1.631.549.2882
sales@zmda.com
This information applies to a product under development. Its characteristics and specifications are subject to change without notice. ZMD assumes no obligation regarding future manufacture
unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, ZMD shall not be liable to any customer, licencee or any other third party
for any damages in connection with or arising out of the furnishing, performance or use of this technical data. No obligation or liability to any customer, licencee or any other third party shall
result from ZMD`s rendering of technical or other services.
Industrial
Consumer/Medical
Blood Pressure Meters
PDAs
ZMD Far East
1F, No. 14, Lane 268, Sec. 1 Guangfu Rd.
HsinChu City 300
Taiwan
Tel +886.3.563.1388
Fax +886.3.563.6385
sales@zmd.de
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