The
Analog
Mixed Signal Company
ZMD31012
RBic
2
Lite
™
Two Low-cost Sensor Signal Conditioners
ZMD31010 Chips in One Package
P R E L I M I N A RY
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 -50°C to +150°C
• 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
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 @ -25°C to 85°C;
±0.25% FSO @ -40°C to 125°C)
• 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.
• ZMD31010 Development Kit can be used
• Support for industrial mass calibration will be available
• Quick circuit customization possible for large production volumes
Application Circuit
Application Examples
Appliances
Industrial
Automotive
Consumer/Medical
Filter Check
•
Refrigerant
•
Pressure Monitoring
•
Process Control
•
Dataloggers
•
Airflow
•
Differential Pressure
•
Process Control
•
Redundancy
•
Blood Pressure Meters
•
PDAs
•
Ordering Code
Example:
ZMD Product Sales Name
ZMD31012 BIF-T
Delivery Form**
T = delivery in tube
R = delivery in tape on reel
S = special (e.g. sample box)
Design Revision
A = first design revision
B = second design revision
etc.
Die/Package Options
B
C
D
F
G1
=
=
=
=
=
tested dice on unsawn wafer
tested dice on frame
tested dice in waffle pack
finished parts in plastic package
finished parts in “green” plastic package
(lead-free terminals – pure Sn)
Target Application Area/
Usual Operating Temperature Range*
I = Industrial (-40°C
to
+125°C)
E = Extended automotive (-50°C
to
+150°C)
* 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.
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
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
© ZMD AG 2006 · Rev. 0.1 · Preliminary
www.zmd.biz
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.
PCB Design
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