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Número de pieza | MLX90601C | |
Descripción | SPI IR thermometer module | |
Fabricantes | Melexis | |
Logotipo | ||
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Datasheet MLX90601C
SPI IR thermometer module
Features
• Remote temperature measurement
• Fully linearised signals
• 125kb/s SPI
• Factory calibrated
• EEprom ECC
• Open drain relay driver output
Applications
• Automotive climate control
• Toasters, microwave ovens and other appliances that require temperature control
• Residential, commercial climate control and occupancy detection
• Industrial temperature transducer and monitoring applications
Ordering Information
ML X 9 0 6 0 1 E Z A C X X
Product Code
Temperature
Suffix
Type Version
Package
Suffix
Supply, i/o-Configuration
and temperature ranges
B Analog voltage output
C SPI serial interface
D PWM output
Part No
MLX90601
MLX90601
Temperature
E
E
Suffix
Package
ZA
ZA
Type
C
C
Version
AA
BA
Description
digital SPI –20/120°C 5V supply
digital SPI 5/60°C 5V supply
Functional Diagram
IR+
IR-
Rsens
VSS
MLX90247
IRINP
VDD
IRINN
TINP
TEMPOUT
TINN
IROUT
MLX90313
CREF
CS
SCLK
SDI
SDO
REL1
VREFP
VSS
R3
C2 C3
R1
C4
R2
C5
5V
TEMPOUT
IROUT
CS
SCLK
DIN
DOUT
REL
VREF
VSS/GND
Description
The MLX90601C is a versatile IR thermometer
module, which performs signal conditioning,
linearisation and ambient temperature
compensation. The module is built around the
MLX90313 IR amplifier-interface, which uses
high performance, chopper stabilized amplifiers,
providing excellent noise performance. The
sensing element is the MLX90247 discrete IR
thermopile.
The module is delivered factory calibrated. The
SPI offers both the sensor ambient temperature
and the object temperature in 12 bit digital form.
Additionally the module offers several analog
pins for access to the programmable comparator
circuitry and the reference voltage.
390109060103
Rev. 004
Page 1 of 12
Dec/01
1 page Datasheet MLX90601C
SPI IR thermometer module
Every write command starts with a high to low
transition of CS and ends by a low to high
transition of CS after 32 periods of the serial
data clock (SCLK). MLX90313C reads the data
present on SDI on the rising edge of the clock.
With a delay of 8 periods of the serial clock, the
SPI will repeat the opcode, address and the first
8 bits of data on pin SDO. This allows the
external master to check command and address
and terminate the operation in case of an error
by forcing CS high before the end of the
complete command cycle, i.e. before the end of
the 32 clock periods.
The read command is build up similarly, except
that no data has to be passed of course. On
SDO the opcode will be followed directly by the
requested data, the address is not returned in
this case.
The data on SDO is valid on the rising edge of
the clock. In case of a read command, the SPI
will output the data on SDO starting on the 25th
rising edge of the clock (after CS low) as
indicated in the figure above.
Timing/speed
The baud-rate depends on the serial data clock
(SCLK) supplied by the master controller and is
limited to 125kb/s. The timing requirements are
given in the figure and table below
CS
SCLK
SDI
SDO
tcls
tsu
tsclk
thd
Symbol
tsclk
tcls
tsch
tsu
thd
tdv
SPI timing requirements
Parameter
Value
Sclk period
min 8
CS low to SCLK high min 50
SCLK low to CS high min 50
data in setup time
min 200
data in hold time
min 200
data out valid
min 1
Unit
µs
ns
ns
ns
ns
µs
operation codes
The operation code is the first series of 8bits in a
command, C[7:0] in the figure on the protocol
above.
tsch
tdv
Below table summarizes the operations
available in MLX90313C.
mnem.
WR
RD
WEPR
ER
REPR
BLWR
BLER
Operation Codes
C[7:0]
Command
X101X0XX
Write internal register
X10010XX
Read internal register
0001XXXX
Write EEprom
001XXXXX
Erase EEprom
X0001XXX
Read EEprom
1001XXXX
Block Write EEprom
101XXXXX
Block erase EEprom
Additional information on the SPI and use can
be found in the application note on SPI.
390109060103
Rev. 004
Page 5 of 12
Dec/01
5 Page Physical Characteristics
Datasheet MLX90601C
SPI IR thermometer module
390109060103
Rev. 004
Page 11 of 12
Dec/01
11 Page |
Páginas | Total 12 Páginas | |
PDF Descargar | [ Datasheet MLX90601C.PDF ] |
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