New prod uc t ah1894, Electrical characteristics, Magnetic characteristics – Diodes AH1894 User Manual

Page 4

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AH1894

Document number: DS35741 Rev. 1 - 2

4 of 13

www.diodes.com

July 2013

© Diodes Incorporated

NEW PROD

UC

T

AH1894



Electrical Characteristics

(cont.)

Magnetic Characteristics

(Note 11 &12) (T

A

= -40°C to +85°C, V

DD

= 1.85V, unless otherwise specified)

(1mT=10 Gauss)

BSEL Symbol

Characteristics

Min

Typ

Max

Unit

Low

Bops

LB

(South pole to part marking side)

Low Band - Operation Point

15

30

45

Gauss

Low

Bopn

LB

(North pole to part marking side)

-45

-30

-15

Low

Brps

LB

(South pole to part marking side)

Low Band - Release Point

10

20

35

Low

Brpn

LB

(North pole to part marking side)

-35

-20

-10

High

Bops

HB

(South pole to part marking side)

High Band - Operation Point

25

40

55

High

Bopn

HB

(North pole to part marking side)

-55

-40

-25

High

Brps

HB

(South pole to part marking side)

High Band - Release Point

20

30

45

High

Brpn

HB

(North pole to part marking side)

-45

-30

-20

Bhy (|Bopx|-|Brpx|)

Hysteresis

10

Notes:

11. Typical data is at T

A

= +25

C, V

DD

= 1.85V.

12. Maximum and minimum parameters values over the operating temperature range are not tested in production, they are guaranteed by design, process

control and characterization. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

The AH1894 includes a band select pin (BSEL) so that the operate (Bops and Bopn) and release (Brps and Brpn) points can be adjusted between

two pre-defined ranges. The BSEL can be hard wired within the application circuit or the band can be selected on the fly by using the BSEL pin as

a logic input. This feature allows the AH1894 sensitivity to be changed by firmware within the application without the addition of any external

components. If the BSEL pin is left open circuit the AH1894 defaults to low band.























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