ATS682LSHTN-T Allegro Microsystems Inc, ATS682LSHTN-T Datasheet - Page 10

• 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

Response, without AGC
ATS682LSH
Automatic Gain Control (AGC)
AGC allows the device to operate with an optimal internal elec-
trical signal, regardless of the air gap (within the operating signal
range specification). During calibration, the device determines
the peak-to-peak amplitude of the signal generated by the target
and automatically adjusts the signal gain. Figure 5 illustrates the
effect of this feature.
Automatic Offset Adjust (AOA)
AOA circuitry automatically compensates for the effects of chip,
magnet, and installation offsets. (For capability, see Allowable
User-Induced Differential Offset, in the Operating Characteristics
table.) This circuitry is continuously active in both calibration
mode and running mode. Continuous operation of AOA allows
the IC to compensate for offset drift and for offsets induced by
temperature variations over time.
Figure 5: Automatic Gain Control (AGC). The AGC function corrects for
variances in the air gap. Differences in the air gap affect the magnetic
gradient, but AGC prevents that from affecting device performance, as
shown in the lowest panel.
Response, with AGC
Internal Differential
Internal Differential
Mechanical Profile
Ferrous Target
Analog Signal
Analog Signal
V+
V+
Miniature, Two-Wire, True Zero Speed
Differential Peak-Detecting Sensor IC
AG
AG
AG
AG
Large
Small
Small
Large
Digital Peak Detection
A digital-to-analog converter (DAC) tracks the internal analog
voltage signal V
of the internal analog signal. In the example shown in figure 6,
the DAC would first track up with the signal and hold the upper
peak value. When V
device hysteresis, the output switches, and the DAC begin track-
ing the signal downward toward the negative V
the DAC acquires the negative peak, the output again switches
states when V
this point, the DAC tracks up again and the cycle repeats. The
digital tracking of the differential analog signal allows the IC to
achieve true zero-speed operation.
Figure 6. Peak detection switchpoint detail
Internal
Differential
Analog Signal
Device
Output Current
PROC
V+
I+
PROC
is greater than the peak by the value B
PROC
, and is used for holding the peak value
drops below this peak value by B
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
B
OP
PROC
peak. After
B
RP
RP
OP
. At
, the
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