ZSC31014
RBic
iLiteTM
Digital Output Sensor Signal Conditioner
Brief Description
The ZSC31014 RBic
iLite
™ is a CMOS integrated cir-
cuit for highly accurate amplification and analog-to-
digital conversion of differential and half-bridge input
signals. The RBic
iLite
™ can compensate the mea-
st
nd
st
sured signal for offset, 1 and 2 order span, and 1
nd
and 2 order temperature (Tco and Tcg). It is well-
suited for sensor-specific correction of bridge sen-
sors. Digital compensation of signal 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 RBic
iLite
™ is adjustable to nearly all piezo-resis-
tive bridge sensors. Measured and corrected bridge
values are provided at digital output pins, which can
2
2
be configured as I C™* or SPI. The digital I C™
interface can be used for a simple PC-controlled cal-
ibration procedure to program calibration coefficients
into an on-chip EEPROM. The calibrated RBic
iLite
™
and a specific sensor are mated digitally: fast,
precise, and without the cost overhead associated
with trimming by external devices or laser trimming.
Integrated diagnostics functions make the RBic
iLite
™
particularly well-suited for safety-critical applications.
Benefits
Simple PC-controlled configuration and single-
2
pass digital calibration via I C™ interface – quick
and precise; SPI option for measurement mode
Eliminates need for external trimming
components
On-chip diagnostic features add safety to the
application (e.g., EEPROM signature, bridge
connection checks, bridge short detection).
Low-power Sleep Mode lengthens battery life
Enables multiple sensor networks
Available Support
Evaluation Kit
Application Notes
Mass Calibration Solution
Physical Characteristics
Features
Wide supply voltage capability: 2.7V to 5.5V
Current consumption as low as 70μA depending
on programmed sample rate
Low-power Sleep Mode (<2μA @ 25°C)
Operation temperature: -40°C to +125°C
Small SOP8 package
2
2
High accuracy (±0.1% FSO @ -25 to +85°C;
±0.25% FSO @ -40 to +125°C)
nd
2 order charge-balancing analog-to-digital
converter provides low noise, 14-bit data at
sample rates exceeding 2kHz
Fast power-up to data output response: 3ms
at 4MHz
Digital compensation of sensor offset, sensitivity,
temperature drift, and non-linearity
Eight programmable analog gain settings com-
bine with a digital gain term; accommodates
bridges with spans <1mV/V and high offset
Internal or optional external temperature com-
pensation for sensor correction and for corrected
temperature output
48-bit customer ID field for module traceability
ZSC31014 Application: I C™ Interface, Low-Power
Bsink Option, Internal Temperature Correction
V
supply
ZSC31014
VSS
BSINK
VBP
VBN
VDD
INT/SS
SDA/MISO
SCL/SCLK
(2.7V to 5.5V)
0.1µF
GND
* I C is a trademark of NXP.
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 1.53
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 subject to changes without notice.