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MAX9921

Dual, 2-Wire Hall-Effect Sensor Interface with Diagnostics

Maxim Integrated 

Dual, 2-Wire Hall-Effect Sensor Interface

with Diagnostics

ABSOLUTE MAXIMUM RATINGS

BAT to GND............................................................-0.3V to +60V

ISET to BAT ...........................................................-2.0V to +0.3V

IN1, IN2 to GND..........-5.0V to the lower of +60V or (VBAT + 1V)

DIAG, OE to GND..................................................-0.3V to +6.0V

OUT1, OUT2, ERR to GND....................................-0.3V to +6.0V

Short-Circuit Duration of OUT1, OUT2, ERR to GND

or to 5.5V (individually)............................................Continuous

Current into Any Pin Except IN1, IN2 ...............................±20mA

Current into IN1, IN2.......................................................±100mA

Continuous Power Dissipation (TA = +70°C)

10-Pin µMAX (derate 5.6mW/°C above +70°C) .........444.4mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

DC ELECTRICAL CHARACTERISTICS

(VBAT = 13.6V, VDIAG = 0, VOE = 5V, IN1 = IN2 = no connection, RISET = 63.4kΩ, RPU = 10kΩ at ERR, OUT1 and OUT2, TA = -40°C

to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

GENERAL

BAT Supply Range

VBAT Low for ERR Output Active

VBAT High for ERR Output Active

BAT Supply Current

HALL INPUTS (IN1 and IN2)

Input Current for Output High

Input Current for Output Low

Input Current Hysteresis for

High/Low Detection

Input Pullup Impedance

Input Voltage Interpreted as

Shorted to Battery

Current Range Interpreted as

Open Circuit

Current Level Interpreted as

Shorted Sensor to Ground

SYMBOL

CONDITIONS

VBAT

VBL

VBH

IBAT

ISD

Normal mode

Shutdown mode, VOE = VDIAG = 0V

IIH

IIL

IIN,HYS

RPU

VSB

RISET = 63.4kΩ

RISET = 59.0kΩ

RISET = 63.4kΩ

RISET = 59.0kΩ

RISET = 63.4kΩ

RISET = 59.0kΩ

VBAT = 6V, inputs IN1, IN2 with

IIN = -14mA

Measured with respect to VBAT

IOC

Not a sustained

RISET = 63.4kΩ

ISC

condition, reverts to -

50µA when detected RISET = 59.0kΩ

MIN TYP MAX UNITS

6

18

V

5.2

V

22

V

1

1.3

mA

1

µA

-11.5

mA

-12.4

-7.2

mA

-7.8

0.76

mA

0.78

50

Ω

100

mV

-2

+0.02 mA

-23

mA

-25

2 _______________________________________________________________________________________

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