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MLX90313KDF Datasheet

  • MLX90313KDF

  • Programmable IR Sensor Interface

  • 35頁(yè)

  • ETC

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MLX90313
Programmable IR Sensor Interface
Features and Benefits
Dual low noise, low offset, fully programmable amplifier chain
12 bit on-chip ADC
Powerful signal conditioning and linearisation unit
Multiple output options: 12 bit digital through SPI, 8 bit resolution analog linear signal outputs or
10 bit PWM, both for ambient and object temperature.
On-chip programmable digital moving average LPF for ultimate low noise performance
ISP I/O-configuration and analog settings, accessible by SPI serial interface.
Wide supply voltage range from 4.5V-80V
Applications
Thermopile + thermistor amplification chain
Digital or analog, linear, ambient-compensated IR sensor interface
General purpose programmable sensor amplifier/ signal conditioner
Ordering Information
Part No.
MLX90313
Temperature Suffix
K
Package
DF
Temperature Range
-40C to 125C Automotive
Functional Diagram
Description
The MLX90313 is a versatile in-circuit
programmable interface, which performs signal
conditioning, linearisation and ambient
temperature compensation, particularly for
infrared sensors combined with a thermistor.
Other types of sensors can also be used in
various configurations. Sensors that can be used
include pressure sensors, strain gauges,
acceleration sensors etc.
The amplifier chains in MLX90313 are
programmable in very broad ranges of gain.
Both chains consist of high performance,
chopper-stabilized amplifiers, providing excellent
noise performance and low offset. The I/O
configuration as well as analog settings are in-
circuit programmable by means of the SPI-serial
interface. This serial link can also be used to
read out the output signals digitally. The circuit
can either provide linear analog or PWM (Pulse
Width Modulated) signal outputs. Additional the
circuit can perform simple control applications
using on-board comparators
Supply Regulator
IR+
IR path
pwm
output option
selector
IR-
Thermistor
path
PGA
Tinn
A/D
12Bit
Linearisation unit
PGA
A/D
12Bit
IRout
lin
non
lin
pwm
Tempout
lin
non
lin
Tinp
Digital Control Logic
Configuration eeprom
SPI
interface
SPI
interface
MLX90313 Programmable IR sensor Interface
3901090313
Page 1
Rev 1.0 21-July-2001

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