mlx90323 Melexis Company, mlx90323 Datasheet - Page 5

• Manufacturer Part Number: mlx90323
• Description: 4 ? 20 Ma Loop Sensor Interface With Signal Conditioning And Eeprom
• Manufacturer: Melexis Company

3901090323
Rev 001
5
Pin Definitions and Descriptions
Table 2. Pin Description
Pin
1,2
3
4
5
6,7
8
9
10
11
12
13
14
15
16
Signal
Name
Unused
TSTB
FLT
OFC
VBN,VBP
TMP
V
FET
V
NC
CMO
CMN
GND
COMS
DD
DD1
Description
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
2
3
4
5
6
7
8
VBN
VBP
TSTB
FLT
TMP
OFC
Page 5 of 24
with Signal Conditioning and EEPROM
COMS
VDD1
GND
CMN
CMO
VDD
FET
4 – 20 mA Loop Sensor Interface
16
15
14
13
12
11
10
9
MLX90323
Data Sheet
March/08