MLX16305
Interlock switch sensor interface IC
TABLE OF CONTENTS
FEATURES AND BENEFITS ....................................................................................................................... 1
APPLICATIONS............................................................................................................................................ 1
1. OVERVIEW APPLICATION SCHEMATIC.........................................................................................1-2
2. DESCRIPTION....................................................................................................................................2-2
3. ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 4
4. MLX16305 ELECTRICAL SPECIFICATIONS ...................................................................................... 4
5. PIN ASSIGNMENT ................................................................................................................................ 5
6. BLOCK DIAGRAM ................................................................................................................................ 6
7. GENERAL DESCRIPTION.................................................................................................................... 7
8. PIN DESCRIPTION................................................................................................................................ 7
8.1.
8.2.
8.3.
8.4.
8.5.
8.6.
S
UPPLY
R
ANGE (VSUP) ................................................................................................................................7
EFERENCE (VREF)............................................................................................................7
EGULATION (SENSE)..................................................................................................................8
UTPUT VOLTAGE TO THE MICROCONTROLLER ADC (MEAS_OUT)............................................................8
NPUTS .............................................................................................................................................9
IGNALS ...................................................................................................10
I
NPUT
V
OLTAGE
R
V
O
D
OLTAGE
R
IGITAL
I
ENCODER: INTERNAL
DIGITAL S
9. VOLTAGE MODE (VM) ....................................................................................................................... 13
10. CURRENT MODE (CM)....................................................................................................................... 14
10.1.
10.2.
10.3.
10.4.
C
URRENT TO
V
OLTAGE CONVERSION PRINCIPLE..........................................................................................14
HE ACTUAL MEASUREMENT .......................................................................................................................14
OW TO DO AN OFFSET CURRENT MEASUREMENT........................................................................................15
RRORS ..............................................................................................................................16
T
H
M
EASUREMENT E
11. HOW TO PREDICT THE SYSTEM OPERATING ZONE.................................................................... 17
11.1. VMEASOUT LIMITS.....................................................................................................................................17
11.2.
ISENSE LIMITS .............................................................................................................................................17
12. OVERCURRENT LIMITATION............................................................................................................ 18
13. OVERTEMPERATURE DETECTION.................................................................................................. 19
13.1.
OVERTEMPERATURE CONSIDERATIONS ........................................................................................................20
14. DIAGNOSTICS .................................................................................................................................... 21
14.1.
14.2.
14.3.
SHORTS ........................................................................................................................................................21
OPEN
W
IAGNOSTICS FLOW .....................................................................................................................................22
IRE ..................................................................................................................................................21
D
15. MULTIPLEXING THE ADC INPUT BY SETTING MEAS_OUT HIGH IMPEDANT............................ 23
16. APPLICATION NOTES ....................................................................................................................... 24
16.1.
16.2.
S
YSTEM DEFINITION EXAMPLE WITH 2-WIRE
H
ALL
SWITCHES.....................................................................24
SWITCHES ...................................................................................................................................25
R
ESISTIVE
16.3. 2-WIRE ANALOG SENSORS ............................................................................................................................25
16.4. HIFT ............................................................................................................................................26
GROUND S
17. STANDARD INFORMATION REGARDING MANUFACTURABILITY OF MELEXIS PRODUCTS
WITH DIFFERENT SOLDERING PROCESSES........................................................................................ 27
18. ESD PRECAUTIONS........................................................................................................................... 27
19. PACKAGE INFORMATION................................................................................................................. 28
20. DISCLAIMER....................................................................................................................................... 29
3901016305
Rev. 008
Page 3 of 29
Data Sheet
Jun/12
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