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Details, datasheet, quote on part number:3059
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| Part: | 3059 |
| Category: | Sensors => Hall Effect Sensors |
| Description: | Hall-effect Gear-tooth Sensors -ac Coupled |
| Company: | Allegro Micro Systems, Inc. |
| Datasheet: | Download 3059 datasheet File size : 148 kB |
| Request For quote: | Find where to buy 3059
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Datasheet text preview:
3059 AND 3060
The 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.
HALL- EFFECT GEAR-TOOTH SENSORS --AC COUPLED
Data Sheet 27612.20A
X
X
VCC
1
2
3
4
5
GROUND
FILTER
SUPPLY
OUTPUT
FILTER
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 electromagnetic 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 regulator, two quadratic Hall-effect sensing elements, temperature compensating 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.
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
FEATURES
s Senses Motion of Ferrous Targets Such as Gears s Wide Operating Temperature Range s Operation to 30 kHz s Resistant to RFI, EMI s Large Effective Air Gap s 4.5 V to 24 V Operation s Output Compatible With All Logic Families s Reverse Battery Protection s Resistant to Physical Stress
Always order by complete part number, e.g., UGS3060KA .
3059 AND 3060 HALL - EFFECT GEAR-TOOTH SENSORS --AC COUPLED
1 SUPPLY
FUNCTIONAL BLOCK DIAGRAM
REG
OUTPUT 2
+ X X
4
FILTER
3
GROUND
5
FILTER
Dwg. FH-008
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current High-Frequency Cutoff Output Rise time Output Fall time Symbol V CC VOUT(SAT) IO F F ICC f c oh tr tf Test Conditions Operating IOUT = 20 mA, B > BOP VOUT = 24 V, B < BRP VCC = 18 V, B < BRP -3 dB VOUT = 12 V, RL = 820 VOUT = 12 V, RL = 820 Min. 4.5 -- -- -- 30 -- -- Typ. -- 130 -- 11 -- 0.04 0.18 Max. 24 400 10 20 -- 0.2 0.3 Units V mV µA mA kHz µs µs
MAGNETIC CHARACTERISTICS over operating temperature and supply voltage ranges
Part Numbers Characteristic Operate Point, BOP Release Point, BRP H y s t e r e s i s , Bhys Test Conditions Output switches OFF to ON Output switches ON to OFF BOP - BRP Min. 10 -100 -- UGS3059KA Typ. Max. 65 100 -65 -10 130 -- UGN3060KA or UGS3060KA Min. Typ. Max. 5.0 15 35 -35 -15 -5.0 -- 30 -- Units G G G
NOTES: 1. Magnetic switch points are specified as the difference in magnetic fields at the two Hall elements. 2. As used here, negative flux densities are defined as less than zero (algebraic convention). 3. Typical values are at TA = 25°C and VCC = 12 V. 4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 2002 Allegro MicroSystems, Inc.
3059 AND 3060 HALL -EFFECT GEAR-TOOTH SENSORS --AC COUPLED
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS
100
V CC= 8 V
20
DIFFERENTIAL FLUX DENSITY IN GAUSS
DIFFERENTIAL FLUX DENSITY IN GAUSS
OPERATE POINT
50
3059 OPERATE POINT 3060
10
UGN/UGS3060KA I OUT = 20 mA TA= +25°C
0
0
-50
3060 RELEASE POINT 3059
-10
RELEASE POINT
-100 -50
-20
-25 0 25 50 75 100 125 150
0
5
10
15
20
25
AMBIENT TEMPERATURE IN °C
Dwg. GH-056
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-057
OUTPUT SATURATION VOLTAGE
300
200
I OUT = 20 mA V CC = 12 V
I OUT = 20 mA TA= +25°C
SATURATION VOLTAGE IN mV
200
SATURATION VOLTAGE IN mV
150
100
100
0 -50
50
-25
0
25
50
75
100
125
150
0
5
10
15
20
25
AMBIENT TEMPERATURE IN °C
Dwg. GH-029-1
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-055
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3059 AND 3060 HALL - EFFECT GEAR-TOOTH SENSORS --AC COUPLED
TYPICAL OPERATING CHARACTERISTICS
SUPPLY CURRENT
20
13
TA = +25°C
VCC = 18 V
12
SUPPLY CURRENT IN mA
15
SUPPLY CURRENT IN mA
B < B RP
B B RP
11
10
10
5
9
0 -50
-25
0
25
50
75
100
125
150
8 0 5 10 15 20 25 SUPPLY VOLTAGE IN VOLTS
AMBIENT TEMPERATURE IN ° C
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. 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. 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 nonmagnetized ferrous targets, these devices must be backbiased 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.
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3059 AND 3060 HALL -EFFECT GEAR-TOOTH SENSORS --AC COUPLED
APPLICATIONS INFORMATION (cont'd)
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. 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 highfrequency 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.
24 V MAX
OUTPUT VOLTAGE IN VOLTS
B OP
B RP
0 -B
V OUT(SAT)
0 DIFFERENTIAL FLUX DENSITY, B
E1
+B BE2
Dwg. GH-034
Figure 2
LEADING EDGE TRAILING EDGE
GEAR
DIRECTION OF ROTATION
E2 NORTH
E1
SOUTH
4300 G
B &B
E1
E2
(a)
4130 G 150 G B OP
(b)
B B
E1 E2
0G B RP -150 G
V
OUT
(c)
V
OUT(SAT)
OUTPUT DUTY CYCLE 50%
Dwg. WH-003-1
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