mlx90308ccc Micro Electronics Ltd., mlx90308ccc Datasheet - Page 25

• Manufacturer Part Number: mlx90308ccc
• Description: Programmable Sensor Interface
• Manufacturer: Micro Electronics Ltd.

Figure 11. Error Compensation
Figure 11a. Raw Sensor Output
(measured between VPB and VBN)
Figure 11b. Conditioned Sensor
Output
Figures
performance of an unconditioned sensor output and
a conditioned sensor output versus stimulus
(pressure) and temperature. It can be seen that
Figure 11a has a range of only 170 mV (maximum
range with a 5V supply) and has a non-linear
response over a 0-100 psi range. The sensitivity of
the unconditioned output will also drift over
temperature, as illustrated by the three slopes. The
MLX90308 corrects these errors and amplifies the
output to a more usable voltage range as shown in
Figure 11b.
MLX902xx Name of Sensor
MLX90308CCC Programmable Sensor Interface
170
0
4
1
0%
0%
11a
and
Pressure
11b
Pressure
above
illustrate
100%
100%
140
-40
140
25
-40
25
the
o
o
o
o
o
o
C
C
C
Rev Y.X
C
C
C
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Table 14. Glossary of Terms
A/D
ADC
ASCII
ASIC
CM
CMN
CMO
COMS
CR
CSGN
CSOF
CV
DAC
DACFnew
DACFold
DARDIS
dB
DOGMO
EEPROM
EOC
ESD
ETMI
ETPI
FET
FG
FLT
GNO
GNOF
GNTP
HS
I/O
IFIX
IINV
ILIM
kHz
LSB
mA
MODSEL
ms
MSB
MUX
mV
nF
OFC
PC
pF
PLL
POR
RAM
RISC
ROM
RS-232
RX
SAR
STC
Tdiff
Text
TMI
TMP
TPI
Tref
TSTB
TX
UART
VBN
VBP
V
VM
VMGN
VMO
WCB
Programmable Sensor Interface
DD
analog to digital conversion
analog to digital converter
American Standard Code for Information
application specific integrated circuit
current mode
current mode negative (supply connection)
current mode output
communication, serial
carriage return
coarse gain
coarse offset
current / voltage mode select bit
digital to analog converter
filtered DAC value, new
filtered DAC value, old
DAC resistor disable
decibel
digital mode
electrically erasable programmable read only
end of conversion flag bit
electrostatic discharge
timer interrupt enable
enable temperature interrupt
field effect transistor
fixed gain
filter pin
gain and offset adjusted digitized signal
gain, offset
temperature gain / offset coarse adjustment
hardware / software limit
input / output
fixed current output value
input signal invert command bit
current limit
kilohertz, 1000 Hz
least significant bit
milliamperes, 0.001 amps
mode select
millisecond, 0.001 second
most significant bit
multiplexer
millivolts, 0.001 Volts
nanofarads, 1 X 10
offset control
personal computer, IBM clone
picofarad, 1 X 10
phase locked loop
power on reset
random access memory
reduced instruction set computer
read only memory
industry std. serial communications protocol
receive
successive approximation register
start A/D conversion
temperature difference
temperature, external
timer Interrupt
temperature signal
temperature interrupt
temperature reference
test mode pin
transmit
universal asynchronous receiver / transmitter
bridge, positive, input
bridge, negative, input
supply voltage
voltage mode
voltage mode gain
voltage mode output
warn / cold boot
Interchange
memory
22/Aug/98
MLX90308CCC
Rev 2.2
-12
-9
farads
farads
23/Oct/01
Page 25