Features
Digital compensation of sensor offset, sensitivity, temperature
drift and non-linearity
Programmable analog gain and digital gain;
accommodates bridges with spans < 1mV/V and high offset
Many diagnostic features on chip (e.g., EEPROM signature,
bridge connection checks, bridge short detection, power loss
detection)
Independently programmable high and low clipping levels
24-bit customer ID field for module traceability
Digital calibration and configuration via one-wire interface
quick and precise
Internal temperature compensation reference
(no external components)
Option for external temperature compensation with addition
of single diode
Output options: rail-to-rail ratiometric analog voltage
(12-bit resolution), absolute analog voltage,
digital one-wire-interface
Supply voltage 2.7 to 5.5V; with external JFET, 5.5 to 30V
Fast power-up to data out response; output available 5ms after
power up
Current consumption depends on programmed sample rate;
1mA down to 250A (typical)
Operation temperature: 50C to +150C
Fast response time: 1ms (typical)
High voltage protection up to 30V with external JFET
No external trimming components required
High accuracy (0.1% FSO @ -25 to 85C;
0.25% FSO @ -50 to 150C)
Application Circuit
Brief Description
The RBic
dLite
TM
is a CMOS integrated circuit for highly accurate
amplification and sensor-specific correction of bridge sensor
signals. Digital compensation of sensor offset, sensitivity,
temperature drift and non-linearity is accomplished via an internal
digital signal processor running a correction algorithm with
calibration coefficients stored in a non-volatile EEPROM.
The
Analog
Mixed Signal Company
ZMD31015
RBic
dLiteTM
Low-Cost Sensor Signal Conditioner
with Diagnostics
P R E L I M I N A RY
The RBic
dLite
TM
is adjustable to nearly all piezo-resistive bridge
sensors. Measured and corrected bridge values are provided
at the SIG
TM
pin, which can be configured as an analog voltage
output or as a one-wire serial digital output.
The digital one-wire interface can be used for a simple PC-
controlled calibration procedure to program a set of calibration
coefficients into an on-chip EEPROM. The calibrated RBic
dLite
TM
and a specific sensor are mated digitally: fast, precise, and without
the cost overhead associated with trimming by external devices
or laser. Integrated diagnostics functions make the RBic
dLite
TM
particularly well suited for automotive applications.
The RBic
dLite
TM
Development Kit is available
includes the Development Board, SOP8 samples, software,
and documentation.
Support for industrial mass calibration is available
Quick circuit customization possible for large production volumes
Typical RBic
dLite
TM
Application Circuit
www.zmd.biz
ZMD AG 2006 Rev. 0.1 Preliminary
Application Examples
Ordering Code
Process Control
Dataloggers
Filter Check
Refrigerant
Pressure Monitoring
Appliances
Airflow
Differential Pressure
Process Control
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 5 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 +125C)
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
Mobile Phones
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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