A3121U データシートの表示（PDF） - Allegro MicroSystems

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A3121U

HALL-EFFECT SWITCHES FOR HIGH-TEMPERATURE OPERATION

Allegro MicroSystems 

3121, 3122, AND 3123

HALL-EFFECT SWITCHES

FOR HIGH-TEMPERATURE

OPERATION

ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 12 V.

Characteristic

Supply Voltage

Output Saturation Voltage

Output Leakage Current

Supply Current

Output Rise Time

Output Fall Time

Symbol

VCC

VOUT(SAT)

IOFF

ICC

tr

tf

Test Conditions

Operating

IOUT = 20 mA, B > BOP

VOUT = 24 V, B < BRP

B < BRP (Output OFF)

RL = 820 Ω, CL = 20 pF

RL = 820 Ω, CL = 20 pF

Min.

4.5

—

—

—

—

—

Limits

Typ. Max.

—

24

140

400

<1.0

10

4.6

9.0

0.04

2.0

0.18

2.0

Units

V

mV

µA

mA

µs

µs

MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.

Characteristic

BOP at TA = 25°C

over operating temp. range

BRP at TA = 25°C

over operating temp. range

Bhys at TA = 25°C

over operating temp. range

Min.

250

220

125

80

70

60

A3121

Typ. Max.

350 450

350 500

245 380

245 410

105 140

105 150

Part Numbers*

A3122

Min. Typ. Max.

280 340 400

260 340 430

140 235 330

120 235 360

70 105 140

70 105 140

A3123

Min. Typ. Max

250 345 440

230 345 470

180 240 300

160 240 330

70 105 140

70 105 140

NOTES: Typical values are at T = +25°C and V = 12 V.

A

CC

BOP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).

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

FUNCTIONAL BLOCK DIAGRAM

1 VCC

REG.

X

3 OUTPUT

2 GROUND

Dwg. FH-005-2

115 Northeast Cutoff, Box 15036

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

Copyright © 1992, 1999, Allegro MicroSystems, Inc.

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