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What is 3059?

This electronic component, produced by the manufacturer "Allegro MicroSystems", performs the same function as "HALL-EFFECT GEAR-TOOTH SENSORS -AC COUPLED".


3059 Datasheet PDF - Allegro MicroSystems

Part Number 3059
Description HALL-EFFECT GEAR-TOOTH SENSORS -AC COUPLED
Manufacturers Allegro MicroSystems 
Logo Allegro MicroSystems Logo 


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3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
3059 AND
3060
HALL-EFFECT GEAR-TOOTH SENSORS
—AC COUPLED
XX
VCC
12 34 5
Dwg. PH-011
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC ............................. 24 V
Reverse Battery Voltage, VRCC .......... -30 V
Magnetic Flux Density, B ............ Unlimited
Output OFF Voltage, VOUT .................... 24 V
Output Current, IOUT ......................... 25 mA
Package Power Dissipation,
PD ............................................ 500 mW
Operating Temperature Range, TA
Prefix ‘UGN’ ................. -20°C to +85°C
Prefix ‘UGS’ ............... -40°C to +125°C
Storage Temperature Range,
TS ............................... -65°C to +150°C
The UGN/UGS3059KA and UGN/UGS3060KA ac-coupled Hall-
effect gear-tooth sensors are monolithic integrated circuits that switch
in response to changing differential magnetic fields created by moving
ferrous targets. These devices are ideal for use in non-zero-speed,
gear-tooth-based speed, position, and timing applications such as in
anti-lock braking systems, transmissions, and crankshafts.
Both devices, when coupled with a back-biasing magnet, can be
configured to turn ON or OFF with the leading or trailing edge of a
gear-tooth or slot. Changes in fields on the magnet face caused by a
moving ferrous mass are sensed by two integrated Hall transducers
and are differentially amplified by on-chip electronics. This differential
sensing design provides immunity to radial vibration within the devices’
operating air gaps. Steady-state magnet and system offsets are
eliminated using an on-chip differential band-pass filter. This filter also
provides relative immunity to interference from RF and electromag-
netic sources. The on-chip temperature compensation and Schmitt
trigger circuitry minimizes shifts in effective working air gaps and
switch points over temperature, allowing operation to low frequencies
over a wide range of air gaps and temperatures.
Each Hall-effect digital Integrated circuit includes a voltage regu-
lator, two quadratic Hall-effect sensing elements, temperature com-
pensating circuitry, a low-level amplifier, band-pass filter, Schmitt
trigger, and an open-collector output driver. The on-board regulator
permits operation with supply voltages of 4.5 to 24 volts. The output
stage can easily switch 20 mA over the full frequency response range
of the sensor and is compatible with bipolar and MOS logic circuits.
The two devices provide a choice of operating temperature
ranges. Both devices are packaged in a 5-pin plastic SIP.
FEATURES
s Senses Motion of Ferrous
s Large Effective Air Gap
Targets Such as Gears
s 4.5 V to 24 V Operation
s Wide Operating Temperature Range s Output Compatible With
s Operation to 30 kHz
All Logic Families
s Resistant to RFI, EMI
s Reverse Battery Protection
s Resistant to Physical Stress
Always order by complete part number, e.g., UGS3060KA .

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3059 equivalent
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
Figure 1
TYPICAL TRANSFER
CHARACTERISTIC
24 V
MAX
B OP
0
-B
B RP
V OUT(SAT)
0
DIFFERENTIAL FLUX DENSITY, BE1 – BE2
+B
Dwg. GH-034
4300 G
B &B
E1 E2
B –B
E1 E2
4130 G
150 G
B OP
0G
B RP
-150 G
V
OUT
V
OUT(SAT)
Figure 2
LEADING
EDGE
TRAILING
EDGE
GEAR
DIRECTION
OF ROTATION
E2 E1
NORTH
SOUTH
(a)
(b)
OUTPUT DUTY CYCLE 50%
(c)
Dwg. WH-003-1
Sensor Operation. These sensor ICs each contain
two integrated Hall transducers (E1 and E2) that are used
to sense a magnetic field differential across the face of the
IC (see Sensor Location drawing). Referring to Figure 1,
the trigger switches the output ON (output LOW) when
BE1 - BE2 < BOP and switches the output OFF (output
HIGH) when BE1 - BE2 < BRP. The difference between BOP
and BRP is the hysteresis of the device.
Figure 2 relates the output state of a back-biased
sensor IC, with switching characteristics shown in Figure
1, to the target gear profile and position. Assume a north
pole back-bias configuration (equivalent to a south pole at
the face of the device). The motion of the gear produces
a phase-shifted field at E1 and E2 (Figure 2(a)); internal
conditioning circuitry subtracts the fields at the two
elements (Figure 2(b)); this differential field is band-pass
filtered to remove dc offset components and then fed into
a Schmitt trigger; the Schmitt trigger switches the output
transistor at the thresholds BOP and BRP. As shown
(Figure 2(c)), the IC output is LOW whenever sensor E1
sees a (ferrous) gear tooth and sensor E2 faces air. The
output is HIGH when sensor E1 sees air and sensor E2
sees the ferrous target.
AC-Coupled Operation. Steady-state magnet and
system offsets are eliminated using an on-chip differential
band-pass filter. The lower frequency cut-off of this
patented filter is set using an external capacitor the value
of which can range from 0.01 µF to 10 µF. The high-
frequency cut-off of this filter is set at 30 kHz by an
internal integrated capacitor.
The differential structure of this filter enables the IC to
reject single-ended noise on the ground or supply line
and, hence, makes it resistant to radio-frequency and
electromagnetic interference typically seen in hostile
remote sensing environments. This filter configuration
also increases system tolerance to capacitor degradation
at high temperatures, allowing the use of an inexpensive
external ceramic capacitor.


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