MLX90601C Datasheet, PDF (6/12 Pages) List of Unclassifed Manufacturers – SPI IR thermometer module

Pin Descriptions
REL1
Open drain relay driver output. The typical on-
resistance of this driver is <10Ω with a supply
voltage of VDD=5V. The default configuration of
comparator 1 is shown in the figure below.
REL1
Tobject
COMP
Threshold in
EEPROM
Hysteresis
in EEPROM
VSS
The comparator is a digital comparator, with a
resolution of 12 bits. By default the input polarity
is inverting. By default the trigger temperature is
the object temperature but also the ambient
(sensor) temperature can be used. Threshold
and hysteresis values are version dependent, as
indicated below.
default REL1 settings
Version
Threshold Hysteresis
5/60°C version
45°C
±2°C
-20/120°C version 95°C
±5°C
It is possible to change the configuration and
settings of the comparator through the SPI.
VSS: Supply pin
VDD: Supply pin
SDIN:
Serial data input pin for the SPI. Data is
accepted on the rising edge of the serial data
clock (SCLK)
DOUT:
Serial data output pin for the SPI. Data is valid
on the rising edge of the serial data clock
(SCLK)
Datasheet MLX90601C
SPI IR thermometer module
CSB:
Active low, chip select pin for the SPI.
Communication is started on the falling edge of
CS and ended on the rising edge of CS.
SCLK:
Serial data clock from the external master to be
supplied to this pin. Maximum frequency is
125kHz.
IROUT
In the default setting of the module, this pin is IR
PWM coded temperature output. The driver can
source or sink at least 2mA to/from an external
load. It is possible to change the function of this
pin by means of the SPI. By setting the
appropriate values in the EEPROM configuration
registers the pin can be used as analog output.
For details on how to do this, please refer to the
application note on the SPI. The details on the
functionality of the IROUT pin in analog and
PWM mode are covered in the datasheets on
MLX90601B and MLX90601D respectively.
VREF
Voltage reference I/O pin. This level is by default
dependent on the on-chip band-gap reference
and can be programmed in the range 2-4.5V in
EEprom configuration registers. The default
setting is 4.5V. This voltage is used as
reference for ADC, DAC (analog outputs). The
90313 can be configured to use an external
reference (2-5V) instead of the on-chip band-
gap, if required.
TEMPOUT
In the default setting of the module, this pin is
used as output for comparator2. The driver can
source or sink at least 2mA to/from an external
load. The default configuration of comparator 2
is shown in the figure below.
390109060103
Rev. 004
Page 6 of 12
Dec/01