MLX16305 Datasheet, PDF (12/29 Pages) Melexis Microelectronic Systems – Interlock switch sensor interface IC

MLX16305
Interlock switch sensor interface IC
MUX_Sense
001
010
011
100
101
110
001
010
011
100
101
110
XXX
000
XXX
111
000
111
001
010
011
100
101
110
001
010
011
100
101
110
XXX
XXX
XXX
XXX
XXX
XXX
ENABLE
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MuxSenseLatched MUX_Sup
001
000
010
000
011
000
100
000
101
000
110
000
001
000
010
000
011
000
100
000
101
000
110
000
000
000
000
111
111
other than 000/111
other than 000/111
001
010
011
100
101
110
other than 001/000/111
other than 010/000/111
other than 011/000/111
other than 100/000/111
other than 101/000/111
other than 110/000/111
001
010
011
100
101
110
Z/Overtemp VI_CTRL
MEAS_OUT
DESCRIPTION
FAULT DETECTED on MEAS_OUT
0/0
0
V(SENSE1)/2
0/0
0/0
0/0
0/0
0
0
0
0
V(SENSE2)/2
V(SENSE3)/2
V(SENSE4)/2
V(SENSE5)/2
MUX_Sup=000: SENSE pins are not supplied, and
the weak pull down is active.
MUX_Sense selects the SENSE pins to be
monitored in voltage mode VMEAS_OUT =
Vsense/2.
Normal <VMEAS_DIS;
Else VMEAS>VMEAS_DIS, then the weak pull
down is overruled. A short to Vbat or to another
High Voltage node is detected.
0/0
0
V(SENSE6)/2
0/0
1
0V
0/0
1
0/0
1
0/0
1
0/0
1
0V
MUX_Sup=000: SENSE pins are not supplied, and
0V
0V
the weak pull down is active.
MUX_Sense selects the SENSE pins to be
monitored in current mode: Since there is no current
State used in application for offset measurement
VMEAS_OUT(offset) = 0.9*Ioffset*Rref
0V
supplied, no current can be copied on RREF.
0/0
1
0V
1/0
X
1/0
X
0/1
X
0/1
X
Z
Z
OVTEMP
OVTEMP
MUX_Sense=000 is latched to set Z=1
MUX_Sense=111 has been latched to set
Overtemp=1
MEAS_OUT is high impedant.
OVERTEMP => VMEASOUT>VMEASOUT_OTH;
else: VMEASOUT<VMEASOUT_OTL;
0/0
0
floating node
The output shows the state of an internal floating node.
0/0
0
floating node
This value is undefined because the IC tries to measure voltage on a non-existing channel
0/0
0
V(SENSE1)/2
MEAS_OUT = Voltage on SENSE1 Pin divided by 2
0/0
0
V(SENSE2)/2
MEAS_OUT = Voltage on SENSE2 Pin divided by 2 Normal = VREF/2 ;
0/0
0
V(SENSE3)/2
MEAS_OUT = Voltage on SENSE3 Pin divided by 2 Else VMEASOUT> Normal: Short to Vbat
0/0
0
V(SENSE4)/2
MEAS_OUT = Voltage on SENSE4 Pin divided by 2 ^{Else VMEASOUT< Normal: Short to GND}
0/0
0
V(SENSE5)/2
MEAS_OUT = Voltage on SENSE5 Pin divided by 2 ^{on the sensed channel}
0/0
0
V(SENSE6)/2
MEAS_OUT = Voltage on SENSE6 Pin divided by 2
0/0
0
V(SENSEx)/2
MEAS_OUT = Voltage on SENSE1 Pin divided by 2
0/0
0
V(SENSEx)/2
MEAS_OUT = Voltage on SENSE2 Pin divided by 2
0/0
0
V(SENSEx)/2
MEAS_OUT = Voltage on SENSE3 Pin divided by 2 ^{Normal <VMEAS_DIS;}
Else VMEASOUT =VREF/2 reflecting a short
0/0
0
V(SENSEx)/2
MEAS_OUT = Voltage on SENSE4 Pin divided by 2 _{between sensed channel and supplied channel}
0/0
0
V(SENSEx)/2
MEAS_OUT = Voltage on SENSE5 Pin divided by 2
0/0
0
V(SENSEx)/2
MEAS_OUT = Voltage on SENSE6 Pin divided by 2
0/0
1
ISENSE1*Rref/10 MEAS_OUT = Current on SENSE1 Pin
0/0
1
ISENSE2*Rref/10 MEAS_OUT = Current on SENSE2 Pin
0/0
1
ISENSE3*Rref/10 MEAS_OUT = Current on SENSE3 Pin
0/0
1
ISENSE4*Rref/10 MEAS_OUT = Current on SENSE4 Pin
0/0
1
ISENSE5*Rref/10 MEAS_OUT = Current on SENSE5 Pin
Switch state: current levels OPEN/CLOSE
DIAGNOSTICS:
VMEASOUT = 0
=> Open wire
VMEASOUT > VREF*0.9: => Short to GND
0/0
1
ISENSE6*Rref/10 MEAS_OUT = Current on SENSE6 Pin
(*)in CM VMEASOUT in the above table is the calculated value after subtracting the contribution of the offset = VMEASOUT - VMEASOUT (offset)
3901016305
Rev. 005
Page 12 of 29
Data Sheet
Oct/06