A1421 datasheet(4/15 Pages) ALLEGRO

4 / 15 page

High Precision Hall Effect AC-Coupled Differential

Sensor IC with Integrated Filter Capacitor

A1421, A1422,

and

A1423

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

OPERATING CHARACTERISTICS, continued Valid at TA = – 40ºC to 150ºC, TJ ≤ 165°C; over operational air gap range and VCC

within operating range, unless otherwise noted. Typical operating parameters: VCC=12 V and TA=25°C.

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

MAGNETIC CHARACTERISTICS5,6

Operate Point

BOP

1421, Bdiff increasing, fBdiff = 200 Hz, Bdiff = 50 Gp-p

VOUT switches from low (on) to high (off)

0.0

15.0

27.5

1422, Bdiff increasing, fBdiff = 200 Hz, Bdiff = 50 Gp-p

VOUT switches from high (off) to low (on)

5.0

15.0

35.0

1423, Bdiff increasing, fBdiff = 200 Hz, Bdiff = 200 Gp-p

VOUT switches from high (off) to low (on)

10.0

65.0

100.0

Release Point

BRP

1421, Bdiff decreasing, fBdiff = 200 Hz, Bdiff = 50 Gp-p

VOUT switches from high (off) to low (on)

–12.5

0.0

7.5

1422, Bdiff decreasing, fBdiff = 200 Hz, Bdiff = 50 Gp-p

VOUT switches from low (on) to high (off)

–35.0

–15.0

–5.0

1423, Bdiff decreasing, fBdiff = 200 Hz, Bdiff = 200 Gp-p

VOUT switches from low (on) to high (off)

–100

–65.0

–10.0

Hysteresis

BHYS

1421, fBdiff = 200 Hz, Bdiff = 50 Gp-p

1422, fBdiff = 200 Hz, Bdiff = 50 Gp-p

–

1423, fBdiff = 200 Hz, Bdiff = 200 Gp-p

–

130

–

Applied Magnetic Field7

Bdiff

Differential p-p magnetic field

–

1250

1ICC is equivalent to ICC(max) + 3 mA.

2Time required to initialize device.

3Time required for the output switchpoints to be within speciﬁcation.

4Output Rise Time will be dominated by the RC time constant.

5For lower frequencies, the absolute values of BOP, BRP, and BHYS may decrease due to delay induced by the high-pass ﬁlter.

6See Deﬁnitions of Terms section.

7Exceeding the maximum magnetic ﬁeld may result in compromised absolute accuracy.

A1421 Datasheet(PDF) 4 Page - Allegro MicroSystems

A1421 Datasheet(HTML) 4 Page - Allegro MicroSystems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Datasheet Download

Link URL