A1232 datasheet(5/22 Pages) ALLEGRO

Part #	A1232

Description	Ultra-Sensitive, Hall-Effect Speed and Direction Sensor with TPOS

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Manufacturer	ALLEGRO [Allegro MicroSystems]

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Ultra-Sensitive, Hall-Effect Speed

and Direction Sensor with TPOS

A1232

5

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Electrical Characteristics2

Supply Voltage3

VCC

Operating: TA ≤ 150ºC

3.3

–

24

V

Output Leakage Current

IOFF

Either output

–

<1

10

µA

Supply Current

ICC

2.5

3.7

6.0

mA

Low Output Voltage

VOUT(ON)

IOUT = 20 mA

B > BOP(A), B > BOP(B)

–

185

500

mV

Middle Output Voltage4

VOUT(MID) BRP < B < BOP, VPULL-UP = 12 V, RLOAD = 12 kΩ

–

6

–

V

Output Sink Current, Middle

IOUT(MID)

BRP < B < BOP, VPULL-UP = 12 V, RLOAD = 12 kΩ

–

0.5

–

mA

Output Sink Current Limit

IOM

VCC = 12 V

30

–

70

mA

Chopping Frequency

fC

–

750

–

kHz

Output Rise Time5

tr

CS = 20 pF, RLOAD = 820 Ω

–

1.8

–

µs

Output Fall Time5

tr

CS = 20 pF, RLOAD = 820 Ω

–

1.2

–

µs

Power-On Time6

tON

–

50

65

µs

Power-On State7

POS

t < tON

B = 0 G

VOUT(OFF)

–

t ≥ tON

BRP < B < BOP

VOUT(MID)

–

B > BOP

VOUT(ON)

–

B < BRP

VOUT(OFF)

–

Transient Protection Characteristics

Supply Zener Clamp Voltages

VZ

ICC = 9 mA, TA = 25ºC

28

46

–

V

Supply Zener Current8

IZ

VS = 28 V

–

9.0

mA

Reverse Supply Current

IRCC

VRCC = –18 V, TJ < TJ(max)

–

2

15

mA

ELECTRICAL CHARACTERISTICS: valid over full operating temperature range unless otherwise noted; typical

data applies to VCC = 12 V and TA = 25°C; see typical application circuits

2

Output related specifications listed in the characteristic column are applicable to each output transistor unless otherwise noted.

3

Maximum voltage operation must not exceed maximum junction temperature. Refer to power de-rating curves.

4

VOUT(MID) and IOUT(MID) specified typical values are found when connected as shown in Figure 10 and Figure 11. This information is only guaranteed available before the

first magnetic field transition has occurred and after the power-on time has occurred. The output state transition from the t < tON POS and the t > tON POS is not considered

the first magnetic field transition. See Figure 1 and the Magnetic Truth Table for power-on behavior.

5

CS = oscilloscope probe capacitance

6

Power-On Time is the duration from when VCC rises above VCC(MIN) until both outputs have attained valid states.

7

POS for both outputs is undefined for VCC < VCC(MIN). Use of a VCC slew rate greater than 25 mV/µs is recommended.

8

Maximum specification limit is equivalent to ICC(MAX) + 3 mA.

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