VF526DT Datasheet VF526DT | P1-P3

DESCRIPTION

The VF526DT Bipolar Latch, Dual Hall-effect Digital Position

Sensor has two distinct Hall sensing elements precisely

located 1,4 mm [0.055 in] apart on a single integrated circuit

chip. The elements are encapsulated in a thermoset molding

material.

The two active Hall latches provide speed and direction

indication of a magnetic gradient (such as a rotating ring

magnet) across the face of the package.

The miniature, 4-pin SOT-89B package surface mounts on PC

(Printed Circuit) boards and flexible circuits.

The VF526DT’s built-in temperature compensation is designed

to match the temperature coefficient of low-cost magnets,

allowing for a reliable, yet cost-effective, sensor-magnet

combination.

A unique, regulator circuit provides extremely stable operation

with supply voltages from 3.4 Vdc to 24 Vdc. It can directly

interface with many electronic components without buffering or

compensation circuitry.

FEATURES AND BENEFITS

Temperature-compensated magnetics and ultra-low offset

drift with temperature provides a stable output over a full

temperature range of -40 °C to 125 °C [-40 °F to 257 °F].

Single, miniature 4-pin SOT-89B plastic package supplied

on tape and reel for automated assembly, allowing

potential savings in PC board space and labor cost.

Two separate built-in Hall sensors and their associated

logic circuitry provide a frequency signal for speed output

and a logic level (high or low) signal for direction output,

potentially replacing multiple sensors and electronic

components.

Wide operating voltage range of 3.4 Vdc to 24 Vdc

increases application flexibility.

Tested to moisture sensitivity similar to JEDEC J-STD-

020B, MSL Level 1, allowing the VF526DT to be used in

environments where humidity may be a problem.

RoHS-compliant materials meet Directive 2002/95/EC.

POTENTIAL APPLICATIONS

Transportation

Anti-pinch electric motor control systems for:

power windows

power seats (headrest)

power sliding doors

sunroofs

Magnetic encoding for electronic steering systems

Industrial

Motion control systems for pulleys and belts

Garage door openers and sliding doors

Position and velocity detection in industrial equipment

Linear displacement sensing (using a magnetic strip of

alternating poles)

2 www.honeywell.com/sensing

Table 1. Absolute Maximum Ratings

Characteristic

Sym.

Min.

Max.

Unit

Note 1: Absolute maximum ratings are the

extreme limits that the device will withstand

without damage to the device. However, the

electrical and mechanical characteristics are not

guaranteed as the maximum limits (above

recommended operating conditions) are

approached, nor will the device necessarily

operate at absolute maximum ratings.

Supply voltage

Vcc

-0.5

Output voltage (OFF)

Vout

-0.5

Output ON current

Iout

–

Storage temperature

-65 [-85]

160 [320]

°C [°F]

Operating temperature

-40 [-40]

150 [302]

°C [°F]

ESD:

IEC 801-2, Lev 1

MIL-STD-883, Method 3015.7

ESD

–

Magnetic flux

no limit

–

Table 2. Specifications

Characteristic

Sym.

Condition

Min.

Typ.

Max.

Unit

Magnetic actuation type

bipolar latch

Output type

dual open collector, sinking

(speed and direction)

Supply voltage

Vcc

–

3.4

–

Vdc

Operating temperature

Temp

Vcc = 3.4 V to 24 V

-40 [-40]

–

125 [257]

°C [°F]

Supply current (OFF)

Ioff

Vcc = 24 V, -40 °C < T < 125 °C,

Vout = 24 V, B<MIN REL

–

Supply current (ON)

Ion

Vcc = 24 V, -40 °C < T < 125 °C,

Isink = 5 mA, B<MAX OP

–

Load current

Isink

Vcc = 24 V, -40 °C < T < 125 °C,

Isink = 5 mA, B<MAX OP

–

Output saturation

Vsat

Vcc = 24 V, -40 °C < T < 125 °C,

Isink = 5 mA, B<MAX OP

–

0.4

Circuit speed to direct delay

Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF

–

µs

Rise time

Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF

–

1.5

µs

Fall time

Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF

–

1.5

µs

Frequency

Top

Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF

–

>1000

Operate point

Bop

T = 25 °C

-40 °C < T < 125 °C

–

130

–

200

Gaus

Release point

Brel

T = 25 °C

-40 °C < T < 125 °C

–

-60

-130

–

-200

Gaus

Differential (OP-REL)

Diff

T = 25 °C

-40 °C < T < 125 °C

–

200

260

–

320

Gaus

Symmetry ([OP +REL]/2)

Sym

T = 25 °C

-40 °C < T < 125 °C

–

-65

–

Gaus

Package style

SOT-89B

Moisture sensitivity test

similar to JEDEC J-STD-020B, MSL Level 1

Package quantity

available in 1000/tape and reel

Figure 1. Output Timing Diagram

SPEED

DIRECTION

TIME

Change

Direction

Honeywell Sensing and Control 3

Figure 2. Sensor Function Diagram with Customer-Supplied Magnet

Figure 3. Mounting Dimensions (For reference only. mm/[in].)

Tape

Solder Pad

2,5

[0.098]

2,0

[0.079]

21 3

0,7 TYP

[0.028]

0,8 TYP

[0.031]

0,8

[0.031]

2,6

[0.102]

4,6

[0.181]

1,2

[0.047]

Trigger and

Amplifier

Trigger and

Amplifier

Hall 1

Hall 2

Logic

SPEED

OUTPUT

DIRECTION

OUTPUT

S N

When the change in magnetic flux at Hall 1 leads

the change at Hall 2, the direction output is HIGH;

when it follows Hall 2, the direction output is LOW.

P1-P3 P4-P4

VF526DT

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Description:

Magnetic Sensors Board Mount Hall Effect / Magnetic Sensors SOT-89B 3.4 Vdc to 24 Vdc

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