MLX90323 Datasheet, PDF (5/25 Pages) Melexis Microelectronic Systems – 4 – 20 mA Loop Sensor Interface with Signal Conditioning and EEPROM

MLX90323
4 – 20 mA Loop Sensor Interface
with Signal Conditioning and EEPROM
5 Pin Definitions and Descriptions
Table 2. Pin Description
Pin Signal Name Description
1,2 NC
3 TSTB
4 FLT
5 OFC
6,7 VBN,VBP
8 TMP
9
V_DD
10 FET
11 V_DD1
12 NC
13 CMO
14 CMN
15 GND
16 COMS
Do not connect
Test pin for Melexis production testing. (in normal application connected to
VDD)
Filter pin; allows for connection of a capacitor to the internal analog path.
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.
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.
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.
Do not connect
Current output.
Current negative rail. Current return path.
Power supply return.
Serial communications pin. Bi-directional serial communication signal for
reading and writing to the EEPROM.
1
NC
2
NC
3
TSTB
4
FLT
5
OFC
6
VBN
7
VBP
8
TMP
COMS
16
GND
15
CMN
14
CMO
13
NC
12
VDD1
11
FET
10
VDD
9
3901090323
Rev 003
Page 5 of 25
Data Sheet
Feb/12