ZMD31010
RBic
Lite
TM
Low-Cost Sensor Signal Conditioner
Datasheet
Features
•
Digital compensation of sensor offset, sensitivity,
temperature drift and non-linearity
•
Accommodates differential sensor signal spans from
1.2mV/V to 60mV/V
•
ZACwire
TM
one-wire interface.
•
Internal temperature compensation and detection
via bandgap PTAT*
•
Optional sequential output of both temperature and
bridge readings on ZACwire
TM
digital output
•
Output options: rail-to-rail analog output voltage,
absolute analog voltage, digital one-wire-interface
•
Supply voltage 2.7 to 5.5V, with external JFET 5.5V
to 30V
•
Current consumption, depending on adjusted
sample rate: 0.25mA to 1mA
•
Wide operational temperature: –50 to +150°C
•
Fast response time 1ms(typical)
•
High voltage protection up to 30V with external JFET
•
Chopper-stabilized true differential ADC
•
Buffered and chopper-stabilized output DAC
*
Proportional to absolute temperature
Benefits
•
No external trimming components required
•
PC-controlled configuration and calibration via one-
wire interface – simple, low cost
•
High accuracy (±0.1% FSO @ -25 to 85°C; ±0.25%
FSO @ -40 to 125°C)
•
Single pass calibration – quick and precise
•
Suitable for battery-powered applications
•
Small SOP8 package
Brief Description
The RBic
Lite
™ 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
order compensation can be enabled for temperature
coefficients of gain and offset or bridge linearity.
RBic
Lite
™ communicates via ZMD’s ZACwire
TM
serial
interface to the host computer and is easily mass
calibrated in a Windows
®
environment. Once cali-
brated, the output SIG™ pin can provide selectable 0
to 1V, rail-to-rail ratiometric analog output, or digital
serial output of bridge data with optional temperature
data.
•
•
•
•
Development Kit available
Multi-Unit Calibrator Kit available
Support for industrial mass calibration available
Quick circuit customization possible for large
production volumes
Application Circuit
Typical RBic
Lite
TM
Application Circuit
RBic
Lite
™ Datasheet, Rev. 1.2, February 28, 2006
Page 1 of 38
© ZMD AG, 2006
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.
ZMD [ Zentrum Mikroelektronik Dresden AG ]
