Datasheet
MLX90601C
SPI IR thermometer module
390109060103
Page 3 of 12
Dec/01
Rev. 004
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Fall time*
90% to 10% of Vh
13.3
100
µs
Output voltage high
Vh
Ihigh=2mA
4
V
Output voltage low
Vl
Ilow=2mA
1
V
*Without external loading
General Description
MLX90601 is a versatile IR thermometer built
around the MLX90247 Discrete IR thermopile
sensor with on-chip PTC and the MLX90313
Programmable IR sensor interface.
MLX90313 amplifies the signals coming from
MLX90247 and converts them to digital by
means of two high performance, low noise,
chopper stabilized amplifiers and the 12-bit
analog to digital converter. The digital unit on
the interface then performs the ambient
compensation of the IR signal. This results in
two temperature signals, one representing the
temperature of the object the IR sensor is
pointed at (Tobject) and one representing the
temperature of the sensor (Tambient). Both
signals are then linearised and stored in
dedicated registers, which are accessible
through SPI (Tobject at register address 09h,
Tambient at register address 0Ah).
The REL1 output is directly connected to the
open drain relay driver output of the comparator
circuitry inside MLX90313. The TEMPOUT pin
is connected to a pseudo push-pull output stage
of the second comparator. Both comparators
can act on the linearised object or ambient
temperature and have programmable hysteresis
values and polarity settings.
Unique Features
MLX90601 is an automotive grade IR
thermometer that can be fitted to any contactless
temperature measurement application by means
of the programmable Interfaces. The module is
designed to cope with all standard qualification
tests oriented towards the harsh automotive
environment.
If so desired, all temperature ranges and
comparator settings can be adapted to the
application.
MLX90601 is delivered calibrated, relieving the
customer of IR calibration.
Absolute Maximum Ratings
Supply Voltage, VDD (overvoltage)
80V
Supply Voltage, VDD (operating)
4.5V - 6V
Reverse Voltage Protection
-5V
Supply Current, IDD @25
°C
6 mA
Output Current, IOUT
mA
Operating Temperature Range, TA
-40
°C - 125°C
Storage Temperature Range, TS
-55
°C - 150°C
ESD Susceptibility
4kV
Pinout
Pin
Symbol
Description
1
REL1
Open drain, relay driver
comparator output
2
VSS
Ground
3
VDD
Supply pin
4
SDIN
SPI data input
5
SDOUT
SPI data output
6
CSB
SPI chip select input
7
SCLK
SPI clock input
8
IROUT
Object temperature output
9
VREF
Reference voltage
10
TEMPOUT
Ambient temperature output
Detailed Description
Analog Features
Supply
The module should be supplied directly with a
nominal 5V regulated supply on pin VDD. (4.5V
– 6V)
The power-on reset circuitry is completely
internal to MLX90313. The module is fully
operational 16 ms from the time the supply
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