MC01 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – Digitally Trimmed Sensor Signal Conditioner

Data Sheet
MC01
Digitally Trimmed Sensor Signal Conditioner
General Description
The MC01 provides a highly integrated
interface for sensors, optimized for resistive
bridge sensor calibration and compensation
with minimum external components. It
provides a 2-bit programmable current
source for biasing of external sensors, a 4-
bit programmable-gain instrumentation
amplifier, two 10-bit Digital-to-Analog
converters and an 88-bit EPROM for
storing the calibration data and configuring
the device. The signal processing tasks
performed include 10-bit Analog-to-Digital
Conversion, averaging, and compensation
of offset, offset temperature coefficient,
full-span output, as well as full-span output
temperature coefficient. It also performs
correction of zero position and sinusoidal
nonlinearity -e.g., that of Infineon Giant
Magnetoresisive Sensors (GMR)-. Either
analog or PWM outputs are provided.
When interfacing the Infineon Giant
Magnetoresisive Sensor, the device
provides the angular position of a standard
magnet centered above the sensor. A
programmable range covering up to 110º is
divided into 512 steps (9 bits of resolution).
In the PWM output configuration the PWM
duty cycle limits are programmable, as well
as the zero position. The device is
insensitive to the peak magnetic field,
magnetic offset and displacement of the
magnet.
Built-in testability features of the MC01
allow to speed up, automate, and simplify
the calibration and compensation of the
device.
Although optimized for use with Infineon
Giant Magnetoresistive sensors, the MC01
may also be used with other resistive
sensors
(piezoresistive
sensors,
accelerometers and strain gauges) with
some external components and off-chip
linearization (if needed).
Features
• Accurate Single-Chip Sensor Signal
Conditioning
• Sensor Deviations Trimmed Using
Correction Coefficients Stored in
Internal EPROM.
• Compensation of Offset, Offset TC,
Full-Scale Output, Full-Scale Output
TC, and Sinusoidal Nonlinearity
• Power Supply selectable:
a) 6.5 –30V (40V for 20000 s)
b) 5V
• Programmable Current Source (2.5
mA to 4 mA, 4 Steps) for Sensor
Biasing
• Programmable Analog Gain (18 to
64, 16 Steps)
• 9 bit Resolution (Higher Resolution
Under Development)
• Wide Temperature Range.
Pin Configuration
VDD
VB
OUT
NC
GND
PROG
PW1
PDB
SENS0
SENS1
SENS2
TESTCK
REXT
RESETN
CLK2
CLK1
Fig. 1. MC01 pinout
Applications
- When used with the GMR sensor:
Contactless potentiometer
Absolute position sensor
PC mouse
- When used with other resistive sensors:
Piezoresistive Pressure and
Acceleration
Transducers
Automotive Systems
Hydraulic Systems
Strain-Gauge Sensors
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