MAX9621 datasheet(3/14 Pages) MAXIM

3 / 14 page

Dual, 2-Wire Hall-Effect Sensor Interface with

Analog and Digital Outputs

DC ELECTRICAL CHARACTERISTICS (continued)

(VBAT = 13.6V, VSLEEP = 5V, IN1 = IN2 = no connection, RSET = 61.9kI to BAT, RPU = 10kI at DOUT1 and DOUT2, RL = 5kI to

GND at AOUT1 and AOUT2, unless otherwise noted, TA = -40NC to +125NC. Typical values are at TA = +25NC.) (Note 1)

Note 1: All DC specifications are 100% production tested at TA = +25°C. AC specifications are guaranteed by design at TA =

+25°C.

Note 2: Parameters that change with the value of the RSET resistor: IIH, IIL, IIN_HYS, ISC, tBL, tRAMP, tDEL, fMAX, and PR.

Note 3: Following power-up or startup from sleep mode, the start of the blanking period is delayed 20Fs.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Referred Current Offset

IOS

Inferred from measurements at

IIN = -5mA, -14mA

-120

+120

AOUT_ Dropout Voltage

VBAT = 5.5V,

for 5% current

reduction

IIN = -14mA

0.85

1.6

IIN = -20mA

1.09

1.75

AOUT_ Output Impedance

500

LOGIC I/O (DOUT1, DOUT2)

Output-Voltage Low DOUT1,

DOUT2

VOL

Sink current = 1mA

0.4

Three-State Output Current

DOUT1, DOUT2

IOZ

VSLEEP = 0V, 0V P VDOUT_ P 5V

±1

SLEEP

Input-Voltage High

VIH

2.0

Input-Voltage Low

VIL

0.8

Input Resistance to GND

RIN

100

AC TIMING CHARACTERISTICS

Shutdown Delay from SLEEP

Low to IN_ Shutoff

tSHDN

IIH = -14mA to GND, time from SLEEP low

to IN_ drop 500mV, CL = 20pF

IN_, Blanking Time at Hall

Sensor Power-Up

tBL

IIH = -14mA to GND, time from

VIN_ = 500mV until DOUT_ high, CL =

20pF (Notes 2, 3)

103

IN_, Current Ramp Rate After

Turn-On

tRAMP

IN_ = GND (Note 2)

3.6

6.7

mA/Fs

Delay from IN_ to DOUT_ (Filter

Delay)

tDEL

From IIH to IIL or from IIL to IIH,

CL = 20pF, Figure 1 (Note 2)

10.8

13.5

Delay Difference Between

Rising and Falling Edges of

Both Channels

tDM

CHALL-BYPASS = 0.01FF, IIH = -11.5mA

and IIL = -7.5mA, CL = 20pF

Delay Difference Between

Channels

tCC

CHALL-BYPASS = 0.01FF, IIH = -11.5mA

and IIL = -7.5mA, CL = 20pF

500

Maximum Frequency on Hall

Inputs

fMAX

CHALL-BYPASS = 0.01FF, IIH = -11.5mA

and IIL = -7.5mA, CL = 20pF (Note 2)

kHz

Maximum Analog Output

Current During Short-to-GND

Fault

IMAO

-1.4

IN_ Pulse Length Rejected by

Filter to DOUT_

Figure 2 (Note 2)

7.8

11.5

14.6

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