Chopper-Stabilized Precision Hall-Effect Latches

A1220, A1221,

A1222, and A1223

5

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information

Characteristic

Symbol

Test Conditions

Value Units

Package Thermal Resistance

Package LH, 1-layer PCB with copper limited to solder pads

228

ºC/W

side connected by thermal vias

110

ºC/W

Package UA, 1-layer PCB with copper limited to solder pads

165

ºC/W

6

7

8

9

2

3

4

5

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

20

40

60

80

100

120

140

160

180

Temperature (ºC)

Power Derating Curve

Package LH, 1-layer PCB

Package LH, 2-layer PCB

Package UA, 1-layer PCB

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

20

40

60

80

100

120

140

160

180

Temperature (°C)

Power Dissipation versus Ambient Temperature

(R

ºC/W)

Packa

ge UA

, 1-laye

r PCB

(R

θJA

= 228 ºC

/W)

Package

LH, 1-lay

er PCB

(R

10 ºC

/W)

Pack

age

LH,

2-lay

er P

CB