mlx90308ccc Micro Electronics Ltd., mlx90308ccc Datasheet - Page 24

• Manufacturer Part Number: mlx90308ccc
• Description: Programmable Sensor Interface
• Manufacturer: Micro Electronics Ltd.

Figure 10. Application Example
MLX90308CCC Programmable Sensor Interface
Figure 10b. Programmable Oil Pressure Gauge Electrical Connections
Pressure
Sensor
Current Mode, which allows the user a 4 to 20 milliampere current range to use as a
2-wire analog sensor.
sharing the same supply and ground reference. A third wiring option is
Figure 10a. Programmable Oil Pressure Gauge
Voltage Mode, in which the output (VMO) is tied to an A/D converter
of the supply voltage. The MLX90308 can be operated in Ratiometric
1
2
3
4
5
6
7
8
voltage to the sensor and analog circuit is regulated independent
TSTB
VBN
VBP
TMP
FLT
OFC
of the IC. This is known as Absolute Voltage Mode, where
IO1
IO2
regulate the voltage to the sensor and the analog portion
MLX90308 uses an external FET as a pass transistor to
pressure sensor element. In this application, the
application of the MLX90308 and a bridge type
This application example illustrates a fundamental
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Programmable Oil Pressure Gauge
COMS
VDD1
GND
CMO
CMN
VMO
VDD
FET
Programmable Sensor Interface
16
15
14
13
12
11
10
9
for Regulation
External FET
Communications
Signal Out
MLX90308CCC
G
Rev 2.2
GND
D
S
V+
GND
Communication
V
+
Signal Out
s
23/Oct/01
Pressure
(psi)
Oil