UGN3059KA [ALLEGRO]
HALL-EFFECT GEAR-TOOTH SENSORS -AC COUPLED; 霍尔效应齿轮齿传感器-AC耦合
| 型号： | UGN3059KA |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | HALL-EFFECT GEAR-TOOTH SENSORS -AC COUPLED |
| 文件： | 总8页 (文件大小：86K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3059AND
3060
HALL-EFFECT GEAR-TOOTH SENSORS
—AC COUPLED
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.
X
X
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.
V
CC
1
2
3
4
5
Each Hall-effect digital Integrated circuit includes a voltage regu-
Dwg. PH-011
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.
Pinning is shown viewed from branded side.
The two devices provide a choice of operating temperature
ranges. Both devices are packaged in a 5-pin plastic SIP.
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,
FEATURES
■ Senses Motion of Ferrous
Targets Such as Gears
■ Wide Operating Temperature Range
■ Operation to 30 kHz
■ Large Effective Air Gap
■ 4.5 V to 24 V Operation
■ Output Compatible With
All Logic Families
■ Reverse Battery Protection
■ Resistant to Physical Stress
PD ............................................ 500 mW
Operating Temperature Range, TA
■ Resistant to RFI, EMI
Prefix ‘UGN’ ................. -20°C to +85°C
Prefix ‘UGS’ ............... -40°C to +125°C
Storage Temperature Range,
TS ............................... -65°C to +150°C
Always order by complete part number, e.g., UGS3060KA .
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
FUNCTIONAL BLOCK DIAGRAM
1
SUPPLY
REG
OUTPUT
2
+
-
3
X
X
GROUND
5
4
Dwg. FH-008
FILTER
FILTER
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic
Symbol
Test Conditions
Min.
4.5
—
Typ.
—
Max.
Units
V
Supply Voltage
V
Operating
24
400
10
CC
OUT(SAT)
Output Saturation Voltage
Output Leakage Current
Supply Current
V
I
= 20 mA, B > B
130
—
mV
µA
OUT
OP
I
V
= 24 V, B < B
RP
—
OFF
OUT
I
V
= 18 V, B < B
RP
—
11
20
mA
kHz
µs
CC
CC
High-Frequency Cutoff
Output Rise time
f
-3 dB
30
—
—
—
coh
t
V
= 12 V, R = 820 Ω
0.04
0.18
0.2
0.3
r
OUT
L
Output Fall time
tf
VOUT = 12 V, RL = 820 Ω
—
µs
MAGNETIC CHARACTERISTICS over operating temperature and supply voltage ranges
Part Numbers*
3059
Typ.
65
3060
Typ.
15
Characteristic
Test Conditions
Min.
10
Max.
100
-10
—
Min.
5.0
-35
—
Max.
35
Units
G
Operate Point, BOP
Release Point, BRP
Hysteresis, Bhys
Output switches OFF to ON
Output switches ON to OFF
BOP - BRP
-100
—
-65
-15
30
-5.0
—
G
130
G
NOTES: * Complete part number includes a prefix to identify operating temperature range (UGN or UGS) and the package suffix KA.
Magnetic switch points are specified as the difference in magnetic fields at the two Hall elements.
As used here, negative flux densities are defined as less than zero (algebraic convention).
Typical values are at TA = 25°C and VCC = 12 V.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1993, 1995 Allegro MicroSystems, Inc.
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS
100
50
20
V
= 8 V
CC
OPERATE POINT
10
0
3059
UGN/UGS3060KA
= 20 mA
OPERATE POINT
3060
I
OUT
T = +25°C
A
0
-50
3060
RELEASE POINT
3059
-10
-20
RELEASE POINT
-100
-50
-25
0
25
50
75
100
125
150
5
10
15
20
25
0
SUPPLY VOLTAGE IN VOLTS
AMBIENT TEMPERATURE IN °C
Dwg. GH-056
Dwg. GH-057
OUTPUT SATURATION VOLTAGE
300
200
200
I
= 20 mA
I
= 20 mA
= 12 V
OUT
OUT
V
T = +25°C
CC
A
150
100
100
0
-50
50
-25
0
25
50
75
100
125
150
5
10
15
20
25
0
AMBIENT TEMPERATURE IN °C
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-029-1
Dwg. GH-055
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
TYPICAL OPERATING CHARACTERISTICS
SUPPLY CURRENT
20
15
10
5
13
T = +25°C
A
V
= 18 V
CC
12
B < B
RP
11
B ≤ B
RP
10
9
0
-50
8
-25
0
25
50
75
100
125
150
0
5
10
15
20
25
AMBIENT TEMPERATURE IN °C
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-028-1
Dwg. GH-031-1
APPLICATIONS INFORMATION
A gear-tooth sensing system consists of the sensor
IC, a back-biasing magnet, and a target. The system
requirements are usually specified in terms of the effective
working air gap between the package and the target (gear
teeth), the number of switching events per rotation of the
target, temperature and speed ranges, minimum pulse
duration or duty cycle, and switch point accuracy. Careful
choice of the sensor IC, magnet material and shape,
target material and shape, and assembly techniques
enables large working air gaps and high switch-point
accuracy over the system operating temperature range.
As used here, negative flux densities are defined as less
than zero (algebraic convention), e.g., -100 G is less than
-50 G.
Magnet Biasing. In order to sense moving non-
magnetized ferrous targets, these devices must be back-
biased by mounting the unbranded side on a small
permanent magnet. Either magnetic pole (north or south)
can be used.
The devices can also be used without a back-biasing
magnet. In this configuration, the sensor can be used to
detect a rotating ring magnet such as those found in
brushless dc motors or in speed sensing applications.
Here, the sensor detects the magnetic field gradient
created by the magnetic poles.
Naming Conventions. With a south pole in front of
the branded surface of the sensor or a north pole behind
the sensor, the field at the sensor is defined as positive.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
Figure 1
TYPICAL TRANSFER
CHARACTERISTIC
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.
24 V
MAX
B
OP
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.
B
RP
V
OUT(SAT)
0
-B
0
+B
DIFFERENTIAL FLUX DENSITY, BE1 – BE2
Dwg. GH-034
Figure 2
LEADING
EDGE
TRAILING
EDGE
GEAR
DIRECTION
OF ROTATION
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.
E2
E1
NORTH
SOUTH
4300 G
B
& B
(a)
E1 E2
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.
4130 G
150 G
B
OP
(b)
(c)
B
– B
0 G
E1 E2
B
RP
-150 G
V
OUT
V
OUT(SAT)
OUTPUT DUTY CYCLE ≈ 50%
Dwg. WH-003-1
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
Low-Frequency Operation. Low-frequency opera-
tion of the sensor is set by the value of an external
capacitor. Figure 3 provides the low-frequency cut-off (-3
dB point) of the filter as a function of capacitance value.
This information should be used with care. The graph
assumes a perfect sinusoidal magnetic signal input.
In reality, when used with gear teeth, the teeth create
transitions in the magnetic field that have a much higher
frequency content than the basic rotational speed of the
target. This allows the device to sense speeds much
lower than those indicated by the graph for a given
capacitor value.
codes Z5S, Y5S, X5S, or X7S (depending on operating
temperature range) or better are recommended. The
commonly available Z5U temperature code should not be
used in this application.
Magnet Selection. The UGx3059KA or UGx3060KA
can be used with a wide variety of commercially available
permanent magnets. The selection of the magnet de-
pends on the operational and environmental requirements
of the sensing system. For systems that require high
accuracy and large working air gaps or
an extended temperature range, the usual magnet mate-
rial of choice is rare-earth samarium cobalt (SmCo). This
magnet material has a high energy product and can
operate over an extended temperature range. For sys-
tems that require low-cost solutions for an extended
temperature range, AlNiCo 8 can be used. Due to its
relatively low energy product, smaller operational air gaps
can be expected. Neodymium iron boron (NeFeB) can be
used over moderate temperature ranges when large
working air gaps are required. Of these three magnet
materials, AlNiCo 8 is the least expensive by volume and
SmCo is the most expensive.
Figure 3
1 k
100
10
System Issues. Optimal performance of a gear-tooth
sensing system strongly depends on four factors: the IC
magnetic parameters, the magnet, the pole piece configu-
ration, and the target.
1.0
0.1
Sensor Specifications. Shown in Figure 4 are
graphs of the differential field as a function of air gap.
A 48-tooth, 2.5” (63.5 mm) diameter, uniform target similar
to that used in ABS applications is used. The samarium
cobalt magnet is 0.32” diameter by 0.20” long
0.01
0.1
1.0
10
CAPACITANCE IN µF
Dwg. GH-025
(8.13 x 5.08 mm). The maximum functioning air gap with
this typical gear/magnet combination can be determined
using the graphs and specifications for the sensor IC.
Capacitor Characteristics. The major requirement
for the external capacitor is its ability to operate in a
bipolar (non-polarized) mode. Another important require-
ment is the low leakage current of the capacitor (equiva-
lent parallel resistance should be greater than 500kΩ). To
maintain proper operation with frequency, capacitor
values should be held to within ±30% over the operating
temperature range. Available non polarized capacitors
include ceramic, polyester, and some tantalum types. For
low-cost operation, ceramic capacitors with temperature
In this case, if a UGx3060KA sensor with a typical BOP
of 15 G and a BRP of -15 G is used, the maximum allow-
able air gap would be approximately 0.120”. If the worst
case switch points of ±35 G for the UGx3060KA are used,
the maximum air gap is approximately 0.105”.
All system issues should be translated back to such a
profile to aid the prediction of system performance.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
Figure 4
DIFFERENTIAL FLUX DENSITY
2000
1500
200
150
1000
500
0
100
50
0
-500
-50
-1000
-1500
-2000
-100
-150
-200
0
0.025
0.050
0.075
0.100
0.125
0.070
0.080
0.090
0.100
0.110
0.120
AIRGAP FROM PACKAGE FACE IN INCHES
AIRGAP FROM PACKAGE FACE IN INCHES
Dwg. GH-035
Dwg. GH-036
Figure 5
SENSOR LOCATIONS
(±0.005” [0.13 mm] die placement)
Ferrous Targets. The best ferrous targets are made
of cold-rolled low-carbon steel. Sintered-metal targets are
also usable, but care must be taken to ensure uniform
material composition and density.
ACTIVE AREA DEPTH
0.014"
0.37 mm
NOM
0.087"
2.20 mm
0.083"
2.10 mm
The teeth or slots of the target should be cut with a
slight angle so as to minimize the abruptness of transition
from metal to air as the target passes by the sensor.
Sharp transitions will result in magnetic overshoots that
can result in false triggering.
0.075"
1.91 mm
E1
E2
Gear teeth larger than 0.10” (2.54 mm) wide and at
least 0.10” (2.54 mm) deep provide reasonable working
air gaps and adequate change in magnetic field for
reliable switching. Generally, larger teeth and slots allow
a larger air gap. A gear tooth width approximating the
spacing between sensors (0.088” or 2.24 mm) requires
special care in the sytem design and assembly tech-
niques.
A
BRANDED
SURFACE
1
2
3
4
5
Dwg. MH-007D
3059 AND 3060
HALL-EFFECT
GEAR-TOOTH SENSORS
—AC COUPLED
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.252
0.247
6.40
6.27
0.063
0.059
1.60
1.50
0.181
0.176
4.60
4.47
45°
45°
0.018
0.083
MAX
0.46
1
2
3
4
5
2.11
MAX
1
2
3
4
5
0.600
0.560
15.24
14.23
0.015
0.38
SEE NOTE
SEE NOTE
0.050
BSC
1.27
BSC
0.016
0.41
Dwg. MH-010G in
Dwg. MH-010G mm
Surface-Mount Lead Form (Suffix -TL)
2.41
0.095
±0.13
±0.005
0.051
MAX
0.002
MAX
0°–8°
0°–8°
0.004
0.10
0.020
0.51
MIN
FLAT
MAX
MAX
MIN
Dwg. MH-015 in
Dwg. MH-015 mm
FLAT
NOTES: 1. Tolerances on package height and width represent allowable
mold offsets. Dimensions given are measured at the widest
point (parting line).
2. Exact body and lead configuration at vendor’s option within
limits shown.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such
departures from the detail specifications as may be required to permit improve-
ments in the design of its products.
3. Height does not include mold gate flash.
4. Recommended minimum PWB hole diameter to clear transition
area is 0.035” (0.89 mm).
The information included herein is believed to be accurate and reliable.
However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for
any infringements of patents or other rights of third parties which may result from
its use.
5. Where no tolerance is specified, dimension is nominal.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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