High Precision Hall Effect AC-Coupled Differential

Sensor IC with Integrated Filter Capacitor

A1421, A1422,

and

A1423

3

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

further from the zero-crossing. The output polarities are shown

in the Product Selection Guide table.

This variety of options provides flexibility for achieving solu-

tions for a wide range of applications, including automotive

transmission and crankshaft speed sensing.

The device package has an operating ambient temperature range

–40°C to 150°C , and is provided in a 4-pin plastic SIP. Each

package is available in a lead (Pb) free version (suffix, –T) , with

a 100% matte tin plated leadframe.

Description (continued)

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

ELECTRICAL CHARACTERISTICS

Supply Voltage

4.0

12

26.5

V

Supply Current

–

4.2

7.0

mA

Output Saturation Voltage

–

140

400

mV

Output Leakage Current

–

–

5

μA

PROTECTION COMPONENT CHARACTERISTICS

Reverse Supply Current

–

–

–1

mA

Supply Zener Current

–

–

10

mA

28

33

37

V

Output Zener Current

–

–

3

mA

Output Zener Clamp Voltage

28

–

–

V

Output Short Circuit Current Limit

–

–

50

mA

RESPONSE CHARACTERISTICS

Power-On State

POS

–

High

–

V

–

4.5

9

ms

0

–

50

ms

4.5

–

59

ms

Upper Corner Frequency

–3 dB, single pole

20

–

–

kHz

Lower Corner Frequency

–3 dB, single pole

–

–

20

Hz

OUTPUT CHARACTERISTICS

–

–

200

ns

Output Fall Time

–

–

200

ns

Continued on next page.