mlx90313 ETC-unknow, mlx90313 Datasheet - Page 6

• Manufacturer Part Number: mlx90313
• Description: Programmable Ir Sensor Interface
• Manufacturer: ETC-unknow

Pin Descriptions
TINP
Temperature sensor positive input pin. The pin connects to the temp-chain amplifier and the on-chip
biasing current source. The source is a mirrored version of the current running into CREF with
programmable ratio. The current source can be switched off for use of external current biasing.
TINN
Temperature sensor negative input.
IRINP - IRINN
Thermopile sensor input pins.
VSS: Supply pin
REL1
Open drain relay driver output. The typical on-resistance of this driver is <10 with a supply voltage of
VDD=5V. Different configurations are possible as shown below.
The comparator is a 12 bit digital comparator. The input polarity can be inverted or not. The threshold and
hysteresis registers are 16 bit registers of which the 11 MSBs are used in the comparator circuitry.
The voltage on the IROUT pin is sampled with 8 bit ADC referred between VREFP and VSS pins.
Note. In case of potentiometer use the linearised analog output is not available. In this case the DAC is
used as 8-Bit ADC for potentiometer (or other voltage source) monitoring.
IROUT
IROUT/POTin analog/digital I/O pin. This pin can be configured as analog output of the IR sensor or as
input for an external potentiometer. (see pin description of REL1). As analog output, this pin can either be
connected to the analog amplified IR sensor signal or to the linearised object temperature by means of the
DAC. The driver can source at least 1mA and sink at least 20 A to/from an external load. If the capacitive
load on this pin exceeds 50pF, this load should be de-coupled by means of a series resistor. This pin can
be configured also as digital output to transmit the IR temperature in PWM format.
The pin is protected for over-voltage and can withstand 16V.
SDIN
Serial data input pin for the SPI. Data is accepted on the rising edge of the serial data clock (SCLK)
MLX90313 Programmable IR sensor Interface
3901090313
SDOUT
VSS
Vrefp
IROUT
Hysteresis in
Tambient or
EEPROM
Tobject
COMP
VSS
REL1
Page 6
Programmable IR Sensor Interface
Hysteresis in
Threshold in
Tambient or
EEPROM
EEPROM
Tobject
COMP
MLX90313
VSS
Rev 1.0 21-July-2001
REL1