HALL-EFFECT SWITCHES

FOR HIGH-TEMPERATURE

OPERATION

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

FUNCTIONAL BLOCK DIAGRAM

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Supply Voltage

V

CC

Operating

4.5

—

24

V

Output Saturation Voltage

V

OUT(SAT)

I

OUT

= 20 mA, B > B

OP

—

14040

0 mV

Output Leakage Current

I

OFF

V

OUT

= 24 V, B < B

RP

—

<1.010

µA

Supply Current

I

CC

B < B

RP

(Output OFF)

—

4.6

9.0mA

Output Rise Time

t

r

R

L

= 820

Ω, C

L

= 20 pF

—

0.04

2.0

µs

Output Fall Time

t

f

R

L

= 820

Ω, C

L

= 20 pF

—

0.18

2.0

µs

ELECTRICAL CHARACTERISTICS over operating temperature range, at V

CC

= 12 V.

MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.

Part Numbers*

A3121

A3122

A3123

Characteristic

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max

B

OP

at T

250350450

28034040

0

250345

440

over operating temp. range

22035050

0

260340430

230345

470

B

RP

at T

125

245

380

140235

330

18024030

0

over operating temp. range

80245

410

120235

360

160240330

B

hys

at T

7010

5

140

7010

5

140

7010

5

140

over operating temp. range

6010

5

150

7010

5

140

7010

5

140

NOTES: Typical values are at T

B

*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).

X

REG.

Dwg. FH-005-2

GROUND

OUTPUT

3

2

1

Copyright © 1992, 1999, Allegro MicroSystems, Inc.