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PDF MLX75031 Data sheet ( Hoja de datos )
| Número de pieza | MLX75031 | |
| Descripción | Optical Gesture & Proximity Sensing IC | |
| Fabricantes | Melexis | |
| Logotipo |  |
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Features & Benefits
Applications
Two independent Active Light measurement
channels for proximity sensing and/or gesture
recognition
Integrated DC light cancellation circuitry
Two logarithmic ambient light channels with
two different sensitivities
Minimum amount of external components
Stand-by and sleep modes for low power
consumption
Integrated LED drivers
Integrated battery voltage monitor
Integrated LED temperature sensing circuitry
Integrated 16bit ADC for high resolution A2D
conversion
Integrated temperature sensor
Integrated watchdog timer
Easy digital communication interface via SPI
High input capacitance tolerant input current
terminals
High safety design by several diagnostic and
monitoring functions
Ordering Information
Robust Proximity Sensing
Smart Touch Displays & Panels
Simple Gesture Detection
Driver-Passenger Discrimination
Ambient Light Sensing & Display Dimming
Functional Diagram
Product Code
MLX75031
MLX75031
Temperature Code
R (-40°C to 105°C)
C (0°C to 70°C)
Package Code
LQ (QFN24 4x4)
LQ (QFN24 4x4)
Option Code
B
B
General Description
The MLX75031 Optical Gesture & Proximity Sensing IC actively controls up to 2 independent Active Light
measurement channels. Each channel consists out of one or multiple LEDs, of any type, combined with
one or more photodiodes, of any type. Additional Active Light channels can be added through
multiplexing. Integrated DC light suppression makes the sensors highly tolerant to background light
interference. Primary function is complemented with two integrated ambient light channels. Internal
control logic, configurable user registers and SPI communication enable intuitive & programmable
operation. Extra features include a watchdog timer, on-board temperature sensor and self-diagnostics are
built-in to facilitate robust product design.
The digital output from the Active Light and ambient light channels can be used for proximity and ambient
light detection. Gestures such as swipe, zoom, scroll can be recognized by software algorithms that can
run on the customer’s microcontroller. Reliable communication is assured via an SPI interface.
1 page  
MLX75031
Optical Gesture & Proximity Sensing IC
with Integrated LED Drivers
Datasheet
3. Glossary of Terms
CR
CRC
CS
CSLP
CSTBY
DAC
DC
DR
EMC
GNDA
GNDD
IR
LPF
LSB
MISO
MOSI
MR
MSB
MUX
NOP
NRM
OSC
OTR
POR
RCO
RO
RR
RSLP
RSTBY
SCLK
SM
SNR
SPI
TIA
VCCA
VCCD
VSENSE
WDT
WR
uC
Chip Reset
Cyclic Redundancy Check
Chip Select
Confirm Sleep
Confirm Standby
Digital to Analog Converter
Direct Current
Device Ready
Electromagnetic Compatibility
Ground for analog blocks of MLX75031
Ground for digital blocks of MLX75031
Infrared
Low-pass filter
Least Significant Bit
Master In Slave Out
Master Out Slave In
Master Reset
Most Significant Bit
Multiplexer
No Operation
Normal Running Mode
Oscillator
Optical transfer ratio
Power on reset
RC-Oscillator
Read-Out
Read Register
Request Sleep
Request Standby
SPI Shift Clock
Start Measurement
Signal-to-Noise Ratio
Serial Peripheral Interface
Transimpedance Amplifier
Supply Voltage for the analog blocks
Supply Voltage for the digital blocks
Voltage across the shunt resistor
Watchdog Timer
Write Register
Microcontroller
REVISION 001 – JANUARY, 2013
39010xxxxx
Page 5 of 5
5 Page 
MLX75031
Optical Gesture & Proximity Sensing IC
with Integrated LED Drivers
Datasheet
Table 5 : Ambient Light Channels Specifications
Ambient Light Channels (Photodiode C & D)
Parameter
Symbol
Test Conditions
Min Typ Max Units
Input current range
for detector C
Input current
threshold level
Input capacity on
ambient PDC
Input current range
for detector D
Input current
threshold level
Input capacity on
ambient PDD
Transfer function
logarithmic
Output Ambient
Channel C
Output Ambient
Channel D
Slope Ambient Channel C
Iambc
Detector C
0.01
1040 uA
Iambc_detect
Detector C
333
nA
Cambc
at 1V, Detector C
1 nF
Iambd
Detector D
0.002
20 uA
Iambd_detect
Detector D
22
nA
Cambd
at 1V, Detector D
100 pF
Vamb
See Section 8.2.2
At VDD=3.3V, Iin=100uA 30464 32768 37376 LSB
At VDD=3.3V, Iin=10uA 30464 32768 37376 LSB
At VDD=3.3V and 105°C 5300 5900 6500 LSB/dec
Slope Ambient Channel D
At VDD=3.3V and 105°C 5300 5900 6500 LSB/dec
Ambient Channels
Linearity Error
for Iin ≥ Iambx_detect
35
%
Ambient light word length
16 bits
Ambient light
channel accuracy
Ambient light
response time
Ambient light
measurement
repetition rate
for averaging of 16
measurements
See Section 8.2.4 for a
detailed explanation of
this parameter.
for Iin ≥ Iambx_detect
13 bits
3 ms
10 ms
Error condition Err_Amb
Err_Amb it is set if the output common mode of one ambient channel SC filter is out of range
(meaning > 55% of VCCA for each of the differential outputs).
REVISION 001 – JANUARY, 2013
39010xxxxx
Page 11 of 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MLX75031.PDF ] | |
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