ACEINNA MFC2030 v1.10

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CONFIDENTIAL

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage (VDD

) ……….…………... 2.7 to +5.5V

Storage Temperature ……...….……..-40

C to +85C

Pressure ……….……………………..0 - 8 Bar Gauge

Shock ……………………..….………… 10g, 0.5ms

Vibration ………………..……………. 1g, 5 to 200 Hz

ESD ...

…………….. 4kV/8kV (contact/air discharge)

.

Note: Stresses above those listed under Absolute Maximum

Ratings may cause permanent damage to the device. This

is a stress rating only; the functional operation of the device

at these or any other conditions above those indicated in the

operational sections of this specification is not implied.

Exposure to absolute maximum rating conditions for

extended periods may affect the device’s reliability.

CONFIGURATION AND MARKING

Pinout Configuration:

Pin

Name

Description

1

VDD

Power Supply

2

VDDIO

I/O Voltage Reference

3

SCL

Serial Clock Line for I2C bus

4

SDA

Serial Data Line for I2C bus

5

GND

Connect to Ground

6

GND

Connect to Ground

7

GND

Connect to Ground

8

NC

Not Connected

Marking Illustration:

Line 1: The arrow sign of ACEINNA Logo denotes the

positive direction of flow

Line 2: Model name

Line 3: Barcode (shown below as a space)

Line 4: Lot number

THEORY OF OPERATION

The flow rate is detected by the MEMS thermal mass

flow sensor. The sensor chip, produced in ACEINNA

proprietary

CMOS

compatible

technology,

is

composed of a central heater source (micro heater)

and two temperature sensors (thermopiles), which are

placed symmetrically upstream and downstream of

the micro-heater. If no gas flows over the sensor

surface, the symmetric thermopiles measure the same

rise in temperature, resulting in the same output

voltage of the two thermopiles. If a non-zero gas flows

from the inlet to the outlet of the meter, the velocity of

a fully-developed laminar air flow unbalances the

temperature profile around the heater and heat is

transferred

from

upstream

thermopiles

to

the

downstream thermopiles, causing a change in the

voltages of the thermopiles. Larger gas flow rates

result in larger asymmetry in the profile.

Zero gas flow.

Non-zero gas flow.

Temp. profiles vs. distances/gas velocities.

MFC2030 pin configuration.