Allegro ATS660LSB Datasheet

ATS660LSB
Data Sheet
27627.107
Some restrictions may apply to cer­tain types of sales. Contact factory for details.
1
2
3
4
Pin 1 = Supply
Pin 2 = Output
Pin 3 = Internal Connection
Pin 4 = Ground
Dwg. AH-006-4
PRELIMINARY INFORMATION
(subject to change without notice)
October 20, 2000
ABSOLUTE MAXIMUM RATINGS
at T
= 25°C
A
Supply Voltage, VCC........................ 26.5 V*
Reverse Supply Voltage, V Output OFF Voltage, V Reverse Output Voltage, V Continuous Output Current, I Reverse Output Current, I Package Power Dissipation,
PD.......................................... See Graph
Operating Temperature Range,
TA............................. -40°C to +150°C*
Junction Temperature,
(continuous), TJ.......................... +165°C
(100 hr), TJM............................... +180°C
Storage Temperature, TS................... +170°C
* Operation at increased supply voltages with external circuitry is described in Applications Information. Devices for operation at in­creased temperatures are available on special order.
OUT
............ -24 V
RCC
................. 26.5 V
.......... -24 V
ROUT
....... 20 mA
OUT
.......... 50 mA
ROUT
TRUE ZERO-SPEED, HALL-EFFECT
ADAPTIVE GEAR-TOOTH SENSOR
The ATS660LSB is an ideal gear-tooth sensor solution for uniform teeth targets as found in today’s demanding transmission applications. This digital differential Hall-effect sensor is the choice when repeatabil­ity and timing accuracy count. The ATS660LSB incorporates patented self-calibration circuitry (U.S. Pat. 5,917,320) that nulls out the effects of installation air gap, ambient temperature, and magnet offsets to provide superior timing accuracy with symmetrical targets over large operating air gaps — typical of targets used in speed-sensing applica­tions (pitches varying from below 0.5 to over 1.2 teeth per diametric millimeter). The self-calibration at power up keeps the performance optimized over the life of the sensor. The ATS660LSB has an open­collector output for direct digital interfacing with no further signal processing required. This device is available in a small 9-mm diameter by 7-mm long package for optimal manufacturing.
The integrated circuit incorporates a dual-element Hall-effect sensor and signal processing that switches in response to differential magnetic signals created by the ferrous gear teeth. The circuitry contains a sophisticated digital circuit to eliminate magnet and system offsets and to achieve true zero-speed operation . D-to-A converters are used to adjust the device gain at power on and to allow air-gap indepen­dent switching, which greatly reduces vibration sensitivity of the device.
FEATURES AND BENEFITS
Fully optimized differential digital gear-tooth sensor
Single-chip sensing IC for high reliability
High vibration immunity
Precise duty cycle
Small mechanical size (9 mm diameter x 7 mm length)
Automatic gain control circuitry (self calibration)
True zero-speed operation
Under-voltage lockout
Wide operating temperature range
Optimized Hall IC magnetic circuit
Digital signal processing
Large operating air gap range
Wide operating voltage range
Excellent repeatability performance
Defined power-on state
Always order by complete part number: ATS660LSB .
ATS660LSB
TRUE ZERO-SPEED, HALL-EFFECT ADAPTIVE GEAR-TOOTH SENSOR
FUNCTIONAL BLOCK DIAGRAM
MAGNET
Dwg. FH-019-2A
X
E1
X
E2
+
REF
+
Pin 3 must be externally connected to pin 4.
REG
SUPPLY1
32 V
UVLO
POSITIVE PEAK
DIGITAL PROC.
NEGATIVE PEAK
DIGITAL PROC.
POWER-ON
LOGIC
REFERENCE
GENERATOR
THRESHOLD
COMPARATORS
+
+
LOGIC
OUTPUT
INTERNAL
3
CONNECTION
CONTROL
CURRENT
LIMIT
<1
OUTPUT
2
GROUND
4
1000
800
100 HO
600
400
200
0
ALLOWABLE PACKAGE POWER DISSIPATION IN mW
40 80 120
CO
60 100 140 18020
AMBIENT TEMPERATURE IN °C
URS M
NTINUO
US
2
AX.
R
θJA
= 147°C/W
160
Dwg. GH-065-6
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000 Allegro MicroSystems, Inc.
ATS660LSB
TRUE ZERO-SPEED,
HALL-EFFECT ADAPTIVE
GEAR-TOOTH SENSOR
ELECTRICAL CHARACTERISTICS at VCC = V
= 12 V and TA = +25°C (unless otherwise
OUT
noted).
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage V
CC
Power-On State POS VCC = 05 V HIGH* HIGH* HIGH*
Under-Voltage Lockout V
Low Output Voltage V
Output Current Limit I
Output LeakageCurrent I
Supply Current I
Output Rise Time I
Output Fall Time I
CC(UV)
OUT(SAT)
OUTM
OFF
CC
r
f
Operating, TJ < 165°C 4.5 12 24 V
VCC = 0 → 5 V 4.1 4.2 4.3 V
I
= 20 mA 0.2 0.4 V
OUT
25 45 55 mA
V
= 24 V 0.2 10 µA
OUT
Output off 3.5 7.0 12 mA
Output on 5.0 8.5 14 mA
RL = 500 , CL = 10 pF 0.2 5.0 µs
RL = 500 , CL = 10 pF 0.2 5.0 µs
Power-On Time t
Zener Voltage V
on
Z
* Output transistor is OFF (high logic level).
Reference gear, <100 rpm 200 µs
IZT = TBD 32 V
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ATS660LSB
TRUE ZERO-SPEED, HALL-EFFECT ADAPTIVE GEAR-TOOTH SENSOR
OPERATION with reference gear at TA = +25°C.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Air-Gap Range AG Operational 0.5 2.5 mm
Calibration Cycle n
Recalibration (Update) n
Minimum Speed v
Maximum Speed v
Duty Cycle Range DC 1000 rpm, 0.5 mm < AG < 2.0 mm ±5%
cal
rcal
min
max
Output edges before which 1 1 1 Tooth calibration is completed
Operating 64 64 64 Teeth
Teeth (cycles) per second 0 kHz
Teeth (cycles) per second 20 kHz
REFERENCE GEAR DIMENSIONS
Limits
Characteristic Symbol Description Min. Typ. Max. Units
Diameter D
Tooth Width T 3.0 mm
Valley Width (pC – T) 3.0 mm
O
120 mm
Valley Depth h
Thickness F 3.0 mm
4
t
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
–3.0– mm
HALL-EFFECT ADAPTIVE
TYPICAL CHARACTERISTICS
ATS660LSB
TRUE ZERO-SPEED,
GEAR-TOOTH SENSOR
12
10
8.0
6.0
4.0
SUPPLY CURRENT IN mA
2.0
0
0
5
SUPPLY VOLTAGE IN VOLTS
12
10
8.0
6.0
4.0
B > BOP
TA = 150°C
A = +25°C
T
A = -40°C
T
10
15 20 25
30
Dwg. GH-041-4
SUPPLY CURRENT IN mA
2.0
0
0
5
SUPPLY VOLTAGE IN VOLTS
10
15 20 25
B < B
TA = 150°C
A
= +25°C
T
A
= -40°C
T
RP
30
Dwg. GH-041-3
1.2
1.0
0.8
0.6
0.4
SUPPLY CURRENT IN mA
0.2
0
-30
-25
REVERSE SUPPLY VOLTAGE IN VOLTS
-20
TA = 150°C
A = +25°C
T
A = -40°C
T
-15 -10 -5.0
Dwg. GH-031-2
350
300
250
200
150
100
50
B > B
TA = 150°C
A
= +25°C
T
A
= -40°C
T
OP
OUTPUT SATURATION VOLTAGE IN mV
0
0
0
5.0
10 15 20 25
OUTPUT SINK CURRENT IN mA
Dwg. GH-059-1
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