ATH25 Data Sheet

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Version:V1.0 —— May 2021

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Note:

1. The power supply voltage of the host MCU must be consistent with the sensor when the product is

used in the circuit.

2. If you need to further improve the reliability of the system, you can control the sensor power supply.

3. When the sensor is just powered on, give priority to the sensor VDD power supply, SCL and SDA

high level can be set after 5ms.

To avoid signal conflicts, the microprocessor (MCU) must only drive SDA and SCL at low level.

An external pull-up resistor (for example: 4.7kΩ) is required to pull the signal to a high level.

Refer to Table 7 and Table 8 for detailed information about sensor input/output characteristics.

6 Electrical Characteristics

6.1 Absolute Maximum Ratings

The electrical characteristics of ATH25 are defined in Table 2. The absolute maximum ratings

given in Table 6 are only stress ratings and provide more information. Under such condition, it

is not advisable for the device to perform functional operations. Exposure to absolute

maximum ratings for a long time may affect the reliability of the sensor.

Parameters

Min

Max

Unit

VDD to GND

-0.3

5.5

V

Digital I/O Pins

(SDA, SCL) to GND

-0.3

VDD+0.3

V

Input current per pin

-10

10

mA

Table 6. Absolute maximum electrical ratings

ESD electrostatic discharge conforms to JEDECJESD22-A114 standard (human body model

±4kV), JEDECJESD22-A115 (machine model ±200V). If the test condition exceeds the

nominal limit index, the sensor needs to add an additional protection circuit.

6.2 Input/Output Characteristics

Electrical characteristics, such as power consumption, input and output high and low voltages,

etc., depend on the power supply voltage. In order to make the sensor communication smooth,

it is very important to ensure that the signal design is strictly limited to the range given in Table

7, 8 and Figure 9).

Table 7. DC characteristics of digital input and output pads, if there is no special statement VDD=2.2

V to 5.5 V; T=-40°C to 80°C

Parameters

Conditions

Min

Typical

Max

Unit

Low output Voltage VOL

VDD=3.3V,

-4mA<IOL<0mA

0

-

0.4

V

High output Voltage VOH

-

70% VDD

-

VDD

V

Output sink current IOL

-

-

-

-4

mA

Low output Voltage VIL

-

0

-

30%VDD

V

High output Voltage VIH

-

70% VDD

-

VDD

V

Input Current

VDD=5.5V,

VIN=0V to 5.5V

-

-

±1

uA