MLX90314
Programmable Sensor Interface
Table 3. Pin Description
Signal
Name
Description
Pinꢀ
1,2 I/O1, 2
Bi-directional I/O. Can also be used as input to A/D converter. I/O can be
controlled by serial communications or by firmware as alarm inputs or level
out. (unconnected when not used)
3
TSTB
Test pin for Melexis production testing. (in normal application connected to
VDD)
4
5
FLT
Filter pin; allows for connection of a capacitor to the internal analog path.
OFC
Offset control output. Provides access to the internal programmed offset
control voltage for use with external circuitry. (unconnected when not used)
Bridge inputs, negative and positive.
6,7 VBN,VBP
8
TMP
Temperature sensor input. An external temperature sensor can be used in
conjunction with the internal one. The external sensor can provide a
temperature reading at the location of the bridge sensor.
Regulated supply voltage. Used for internal analog circuitry to ensure accurate
and stable signal manipulation.
9
VDD
10 FET
11 VDD1
Regulator FET gate control. For generating a stable supply for the bridge
sensor and internal analog circuitry (generates regulated voltage for VDD).
Unregulated supply voltage. Used for digital circuitry and to generate FET
output.
12 VMO
13 CMO
14 CMN
15 GND
16 COMS
Voltage mode output. Compensated sensor output voltage.
Current mode output. Compensated sensor output for current mode operation.
Current mode negative rail. Current mode return path.
Power supply return.
Serial communications pin. Bi-directional serial communication signal for
reading and writing to the EEPROM.
1
16
15
14
13
12
11
10
IO1
IO2
COMS
GND
2
3
TSTB
FLT
CMN
CMO
4
5
6
7
8
OFC
VBN
VMO
VDD1
VBP
FET
VDD
TMP
9
Figure 2. Pinout (SO16W (LW) Package)
3901090314
Page 8
Nov/04
Rev 007
MELEXIS [ Melexis Microelectronic Systems ]
