ATS682LSHTN-T Allegro Microsystems Inc, ATS682LSHTN-T Datasheet - Page 9

• Manufacturer Part Number: ATS682LSHTN-T
• Description: IC HALL EFFECT SENSOR 4SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Linear Field Sensorr

Specifications of ATS682LSHTN-T

• Package / Case: 4-SIP
• Sensing Range: 120mV Trip, 120mV Release
• Voltage - Supply: 4 V ~ 24 V
• Current - Supply: 16.8mA
• Output Type: Analog
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Bandwidth: 40kHz
• Supply Voltage Max: 24V
• Hall Effect Type: Gear Tooth
• Operating Temperature Range: -40°C To +150°C
• Supply Voltage Min: 4V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 620-1327-2

ATS682LSH
Hall Technology
This single-chip differential Hall-effect sensor IC possesses
two Hall elements spaced at a fixed distance (1.5 mm), which
simultaneously are affected by the magnetic profile of the target,
and generate a differential internal analog voltage, V
processed for precise switching of the digital output signal.
The Hall IC is self-calibrating and also possesses a temperature
compensated amplifier and offset compensation circuitry. Its
voltage regulator provides supply noise rejection throughout the
operating voltage range. Changes in temperature do not greatly
affect this device due to the stable amplifier design and the offset
compensation circuitry. The Hall transducers and signal process-
ing electronics are integrated on the same silicon substrate, using
a proprietary BiCMOS process.
Target Profiling
An operating device is capable of providing digital informa-
tion that is representative of the magnetic features on a rotating
target. The waveform diagram shown in figure 3 represents the
automatic translation of the magnetic profile to the digital output
signal of the IC.
Output Polarity
Figure 3 shows the output polarity for the orientation of the target
and package shown in figure 2. The target direction of rotation
Figure 1. Relative motion of the target is detected by the dual Hall
elements mounted on the Hall IC.
Figure 2. This left-to-right (pin 1 to pin 4) direction of target rotation results
in a low output signal when a tooth of the target gear is nearest the face
of the package (see Figure 3). A right-to-left (pin 4 to pin 1) rotation inverts
the output signal polarity.
Hall Effect Device
Hall Element 2
Dual-Element
Target (Gear)
Rotating Target
(Pin 4 Side)
South Pole
North Pole
1
4
(Pin 1 Side)
(Concentrator)
Element Pitch
Hall Element 1
Hall IC
Pole Piece
Back-biasing
Rare-earthPellet
Case
Branded Face
of Package
Functional Description
PROC
Miniature, Two-Wire, True Zero Speed
, that is
Differential Peak-Detecting Sensor IC
Figure 3. Output Profile of a gear target for the polarity indicated in figure 2.
shown is perpendicular to the leads, across the face of the device,
from pin 1 to pin 4. This results in the IC output switching from
high, I
rising mechanical edge, as detected by the IC) passes the branded
face. In this configuration, the device output current switches to
its low polarity when a tooth is the target feature nearest to the
branded face. If the direction of rotation is reversed, then the
output polarity inverts.
Note: the translated output voltage polarity is dependent on the
position of a sense resistor, R
Figure 4. Voltage profiles for high-side and low-side two-wire sensing.
CC(HIGH)
Target
Mechanical Profile
Representative
Differential
Magnetic Profile
IC Electrical
Output Profile, I
I
V
V
OUT
OUT(L)
OUT(H)
, to low I
I+
V+
V+
OUT
ATS682
GND
VCC
4
1
V
CC
CC(LOW)
V
R
I
CC
OUT(L)
SENSE
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
SENSE
, as the leading edge of a tooth (a
(see figure 4).
ATS682
GND
VCC
4
1
V
CC
V
R
I
CC
OUT(H)
SENSE
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