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PDF MLX16305 Data sheet ( Hoja de datos )
| Número de pieza | MLX16305 | |
| Descripción | Interlock switch sensor interface IC | |
| Fabricantes | Melexis Microelectronic Systems | |
| Logotipo |  |
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MLX16305
Interlock switch sensor interface IC
Features and Benefits
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• 6 sense Channels
• Large supply current + supply voltage range for maximum contact cleaning
• Applicable with all 2-wire Hall effect switches
• Diagnoses open wires, shorts to Supplies and shorts between wires
o Current and Voltage measurement mode
o High measurement accuracy: 5%
• Current limited supply regulator
• Automotive qualified (40V Load Dump)
• Over-temperature detection
• Small Package: narrow body (150mils) SO16, RoHS compliant
Applications
• General Fail safe read out of safety interlock switches to
o Detect human action
o Verify solenoid/motor actuation
• Automotive applications
o Next to the Safety ECU: interlock switch sensor supply and sensor I/F
Seat belt buckle
Seat occupancy mat
Air bag presence detection
Seat position switch
Airbag disable switch
o Next to Smart Junction Box / Body Control Module: Contact monitoring
Foot Brake pressed detection
Park position of the automatic transmission
Door lock position
…
o Analog Mux
Resistive coded rotary encoder
Fuel run dry switch
Seat Heater switch
…
• Industrial applications:
o Industrial Security doors and machine guarding
o General 2 wire analog sensors :
Industrial pressure, strain gauge, … sensors (ref. MLX90308,
MLX90314)
Ordering Information
Part No.
MLX16305
Temperature Suffix
E (-40°C to 90°C)
Package Code
DC (SOIC16 150mil)
3901016305
Rev. 005
Page 1 of 29
Data Sheet
Oct/06
1 page  
MLX16305
Interlock switch sensor interface IC
Symbol
Parameter
Conditions
Min Nom Max
Voltage regulation on SENSE pins
Vsense_err1
VSENSE – VREF
3V ≤ Vref ≤5V
-100 100
Vsense_err2
VSENSE – VREF
5V ≤ Vref ≤8.25V
-150
150
CSENSE
Maximum capacitive load on
SENSE pins
150
Miscellaneous
Trise
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SENSE rising time
Vref=5V
from ENABLE=1 to
V(SENSE) = [4.9, 5.1]V
0
150 250
Tshutdown
Thermal Shutdown (junction)
120 150
VMEAS_OTH
MEASOUT Voltage for
Overtemperature condition
1.9
VMEAS_OTL
MEASOUT Voltage without
Overtemperature condition
0.9
IsenseLIM
Current limitation level on SENSE RREF=1kOhm, VREF=5V
pins.
40
80
Unit
mV
mV
nF
us
°C
V
V
mA
5. Pin assignment
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SHORT NAME
SENSE3
SENSE2
SENSE1
VSUP
ENABLE
MUX_SENSE0
MUX_SENSE1
MUX_SENSE2
VREF
VI_CTRL
MEAS_OUT
RREF
VSS
SENSE6
SENSE5
SENSE4
DESCRIPTION
5V / 40mA
5V / 40mA
5V / 40mA
Range: 8V .. 25V
TTL Levels
TTL Levels
TTL Levels
TTL Levels
External Voltage Reference
TTL Levels
Ground (analog + digital)
5V / 40mA
5V / 40mA
5V / 40mA
FUNCTION
Driver Output
Driver Output
Driver Output
Supply
Digital Input
Digital Input
Digital Input
Digital Input
Analog Input
Digital Input
Analog Output
Analog Output
Ground
Driver Output
Driver Output
Driver Output
3901016305
Rev. 005
Page 5 of 29
Data Sheet
Oct/06
5 Page 
MLX16305
Interlock switch sensor interface IC
Z or HIGH IMPEDANT (Dominant setting):
In order to set Z = 1 MuxSenseLatch [0:2] has to be set to 000b.
o When ENABLE = 0, MUX_SENSE has to be set to 000b.
o When ENABLE turns = 1 MuxSenseLatched remains = 000b. Changes on
MUX_SENSE[0:2] are neglected (= don’t care).
Mind that both OVERTEMP=1 or Z=1, are dominant settings on MEAS_OUT. This implies that
any changes on VI_CTRL and MUX_SENSE[0:2] are not visible.
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MIND.
Do not confuse the latch with a flip-flop which is only sensitive during rising edge of the Enable. The latch
is transparent for input changes whilst ENABLE is low, not only during the rising edge.
Timing diagram
12
34 5
6
78
9
MUXSENSE[0:2] 000 100 000 001
010
ENABLE
10
111
MuxSenseLatched[0:2]
MUX_SUP[0:2]
OVERTEMP
Z
000 001 010 111
000 000 001 000 010 000 111
The above timing diagram shows how the inputs are converted internally:
n In case of multiplexing 2 or more devices, the system should start up with MUXSENSE[0:2] and
ENABLE = 0 for all devices in order to avoid conflicts on the MEASOUT output.
o Changes on MUXSENSE are not seen by the device as long as ENABLE is kept high.
p In order to switch from one device to another device all MUXSENSE inputs are reset to 000b.
q In order to start switch MUXSENSE at r, all other devices should have set ENABLE high.
r
a. In Current Mode Channel 0 is selected, VMEASOUT = VMEAS(offset)as long as
ENABLE is low.
b. In Voltage mode, no channel is selected, so VMEAS remains 0V.
s
a. In CM the voltage regulator supplies current to channel 0 (Isense0). Isense0 is copied
onto RREF, and can be calculated from VMEASOUT.
b. In VM the voltage regulator supplies Vref to channel 0 (Vsense0). Vsense0 is copied on
VMEASOUT.
t ENABLE remains high
a. In CM changes on MUXSENSE are neglected (don’t care)
b. In VM, the voltage is measured on channel 1, which has its weak pull down active. If
Vsense1 > 0V then a short to Channel 1 is found.
u ENABLE goes low, disabling all channels while channel 1 is selected. See r
v ENABLE goes high and low again while MUXSENSE remains unchanged.
a. In CM Isense1 can be measured while ENABLE is high.
b. In VM channel 1 is supplied with Vref and the resulting Vsense1 is copied to VMEASOUT
w MUXSENSE=111b displays the OVERTEMP condition on the MEASOUT pin.
3901016305
Rev. 005
Page 11 of 29
Data Sheet
Oct/06
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet MLX16305.PDF ] | |
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