A19350LUBATN-RBE datasheet(4/14 Pages) ALLEGRO

4 / 14 page

High Accuracy GMR Wheel Speed and Direction Sensor IC

A19350

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

OPERATING CHARACTERISTICS: Valid throughout full operating voltage and temperature ranges, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ. [1]

Max.

Unit

ELECTRICAL CHARACTERISTICS

Supply Voltage[2]

VCC

Potential between pin 1 and pin 2

–

Reverse Supply Current[3]

IRCC

VCC = VRCC(MAX)

–10

–

Supply Zener Clamp Voltage

VZsupply

ICC = ICC(MAX) + 3 mA, TA = 25°C

–

Supply Current

ICC(LOW)

Low-current state

5.9

8.4

ICC(HIGH)

High-current state

Supply Current Ratio [4]

ICC(HIGH)/

ICC(LOW)

Measured as a ratio of high current to low

current (isothermal)

1.9

–

ASIL Safety Current

IRESET

Refer to Figure 11

1.5

3.5

3.9

ASIL Safety Current Time

tRESET(EP1) Refer to Figure 11 (Error Protocol 1)

–

μs

tRESET(EP2) Refer to Figure 11 (Error Protocol 2)

–

Output Rise/Fall Time

tr, tf

Voltage measured at terminal 2 in Figure 2;

RL = 100 Ω, CL = 10 pF, measured between

10% and 90% of signal

–

µs

POWER-ON CHARACTERISTICS

Power-On State

POS

VCC > VCC(min) as connected in Figure 1

ICC(LOW)

Power-On Time

tPO

VCC > VCC(min) as connected in Figure 1 [5]

–

OUTPUT PULSE-WIDTH PROTOCOL [6]

Pulse-Width Off Time

tW(PRE)

μs

Forward Pulse Width

tW(FWD)

104

μs

Reverse Pulse Width

tW(REV)

153

180

207

μs

Warning Pulse Width

tW(WARN)

-xxE variant

μs

Standstill Pulse Width

tW(STILL)

-xxE variant

1232

1440

1656

μs

Standstill Period[7]

tSTOP

-xxE variant

590

737

848

Continued on the next page…

[1]

Typical values are at TA = 25°C and VCC = 12 V. Performance may vary for individual units, within the specified maximum and minimum limits.

[2]

Maximum voltage must be adjusted for power dissipation and junction temperature; see representative Power Derating section.

[3]

Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.

[4]

Supply current ratio is taken as a mean value of ICC(HIGH) / ICC(LOW).

[5]

Time between power-on to ICC stabilizing. Output transients prior to tPO should be ignored.

[6]

Pulse width measured at threshold of (ICC(HIGH) + ICC(LOW)) / 2.

[7]

At operating frequencies less than 2 Hz, -xxM variant must be used in order to output forward/reverse/warning direction pulses.

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