MLX90308CCC

Programmable Sensor Interface

MLX90308CCC Programmable Sensor Interface

Page 8

Rev 2.2

23/Oct/01

Pin

Signal

Name

Description

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

FLT

Filter pin; allows for connection of a capacitor to the internal analog path.

5

OFC

Offset control output. Provides access to the internal programmed offset

control voltage for use with external circuitry. (unconnected when not used)

6,7

VBN,VBP

Bridge inputs, negative and positive.

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.

9

Regulated supply voltage. Used for internal analog circuitry to ensure

accurate and stable signal manipulation.

10

FET

Regulator FET gate control. For generating a stable supply for the bridge

sensor and internal analog circuitry (generates regulated voltage for VDD).

11

Unregulated supply voltage. Used for digital circuitry and to generate FET

output.

12

VMO

Voltage mode output. Compensated sensor output voltage.

13

CMO

Current mode output. Compensated sensor output for current mode

operation.

14

CMN

Current mode negative rail. Current mode return path.

15

GND

Power supply return.

16

COMS

Serial communications pin. Bi-directional serial communication signal for

reading and writing to the EEPROM.

Table 3. Pin Description

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

IO1

IO2

TSTB

FLT

OFC

VBN

VBP

TMP

COMS

GND

CMN

CMO

VMO

VDD1

FET

VDD

Figure 2. Pinout (SO16W (LW) Package)