ALS31313 datasheet(6/25 Pages) ALLEGRO

6 / 25 page

Automotive Grade, 3-D Linear Hall-Effect Sensor

with I2C Output and Advanced Low Power Management

ALS31313

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

I2C INTERFACE CHARACTERISTICS [1]: Valid through full range of TA, CBYPASS = 0.1 µF, RPU = 10 kΩ, and I2C Clock Speed

(FCLK) = 400 kHz, unless otherwise specified

Characteristics

Symbol

Test Conditions

Min.

Typ. [1]

Max.

Unit

Bus Free Time Between Stop and Start

tBF

1.3

–

µs

Hold Time Start Condition

tSTA(H)

0.6

–

µs

Setup Time for Repeated Start Condition

tSTA(S)

0.6

–

µs

SCL Low Time

tLOW

1.3

–

µs

SCL High Time

tHIGH

0.6

–

µs

Data Setup Time

tDAT(S)

100

–

Data Hold Time

tDAT(H)

–

900

Setup Time for Stop Condition

tSTO(S)

0.6

–

µs

Logic Input Low Level (SDA, SCL Pins)

VI(L)

I2C threshold = 0; 3.0 V Compatible Mode

–

0.9

I2C threshold = 1; 1.8 V Compatible Mode

–

0.54

Logic Input High Level (SDA, SCL Pins)

VI(H)

I2C threshold = 0; 3.0 V Compatible Mode

2.1

–

I2C threshold = 1; 1.8 V Compatible Mode

1.26

–

Logic Input Current

II2C(IN)

VIN = 0 V to VCC, RPU = 2.4 kΩ

–1

µA

Output Voltage (SDA Pin)

VO(L)

ILOAD = 1.5 mA

–

0.36

Clock Frequency (SCL Pin)

fCLK

–

400

1000

kHz

Output Fall Time (SDA Pin)

RPU = 2.4 kΩ, CBUS = 100 pF

–

250

I2C Pull-Up Resistance

RI2C(PU)

2.4

–

kΩ

I2C Pull-Up Voltage

VI2C(PU)

1.8

3.0

3.3

Total Capacitive Load for SDL and SDA

Buses

CBUS

–

100

[1]

I2C Interface Characteristics are guaranteed by design and are not factory tested.

Figure 3: I2C Interface Timing Diagram

SDA

SCL

tLOW

tHIGH

tSTA(S) tSTA(H)

tDAT(S)

tDAT(H)

tSTO(S)

tBF

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