A1693LKTN-RDNYPL-T [ALLEGRO]
Vibration-Tolerant Hall-Effect Transmission Speed and Direction Sensor IC;
| 型号： | A1693LKTN-RDNYPL-T |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Vibration-Tolerant Hall-Effect Transmission Speed and Direction Sensor IC |
| 文件： | 总15页 (文件大小：815K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A1693
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
FEATURES AND BENEFITS
DESCRIPTION
• Differential Hall-effect sensor IC measures ring
magnets and ferrous targets with inherent stray field
immunity
• Vibration detection algorithms prevent false switching
and provide low-signal lockout
• Large operating air gap with independent switch points
• Three-wire pulse-width output protocol describes speed
and direction
• Wide operating voltage and integrated protection
circuits
The A1693 is a magnetic sensor IC designed for measuring
the speed and direction of rotating transmission systems. This
IC can directly measure ring magnets or be back-biased with
a magnet to measure ferrous targets.
The IC incorporates three Hall-effect elements that sense
differentially,analogsignalconditioningwithdynamicgainand
offset adjustment, analog-to-digital converters (ADCs), and a
digital processor that applies intelligent algorithms to prevent
the output from switching when the sensed target vibrates.
• AEC-Q100 Grade 0 qualified for an ambient operating
temperature range of –40°C to 150°C
The A1693 output is an open collector that requires a pull-up
resistor. Each time a new magnetic state is detected, the output
goes low for a pulse-width time that communicates a forward-
direction, reverse-direction, or non-direction.
The sensor IC is AEC-Q100 qualified for automotive
applications, and is provided in a lead (Pb) free 4-pin single
inline package (SIP) with 100% matte tin leadframe plating.
PACKAGE: 4-PIN SIP (SUFFIX K)
Not to scale
Functional Block Diagram
VCC
Regulator
(Analog)
Multiplexed
Test Signals
TEST
Regulator
(Digital)
VCC
Offset
Adjust
ADC
Filter
Hall Amp
AGC
Synchronous
OUT
Digital Controller
Offset
Adjust
Filter
AGC
ADC
Hall Amp
GND
A1693-DS
MCO-0000653
April 24, 2019
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
SELECTION GUIDE
Part Number*
Package
Packing
A1693LKTN-RSNOBH-T
4-pin SIP
4000 pieces per 13-inch reel
* Not all combinations are available. Contact Allegro for availability and pricing of custom programming or packing options.
ꢀonꢁigꢂration
A1ꢃ93ꢄꢅꢆN-
-ꢆ
100ꢇ matte tin leadꢁrame ꢈlating
ꢉiꢊration ꢋmmꢂnityꢌꢍirection ꢀhangeꢎ
H ꢏ High ꢐiꢊration immꢂnity
ꢄ ꢏ ꢄow ꢐiꢊration immꢂnity
Rꢂnning Mode t
Pꢂlsesꢎ
wꢒNꢍꢓ
ꢘ ꢏ ꢘlanꢙed, no oꢂtꢈꢂt dꢂring Rꢂnning mode
P ꢏ Pꢂlses allowed dꢂring Rꢂnning mode
ꢀaliꢊration Mode t
Pꢂlsesꢎ
wꢒNꢍꢓ
ꢚ ꢏ ꢘlanꢙed, no oꢂtꢈꢂt dꢂring ꢀaliꢊration mode
ꢛ ꢏ Pꢂlses allowed dꢂring ꢀaliꢊration mode
Pꢂlse ꢑidths ꢒtyꢈicalꢓꢎ
N ꢏ Narrow, Reꢐerse ꢔ 90 ꢕs, ꢖorward ꢔ ꢗ5 ꢕs
ꢑꢏ ꢑide, Reꢐerse ꢔ 150 ꢕs, ꢖorward ꢔ 50 ꢕs
Nꢂmꢊer oꢁ Pꢂlsesꢎ
S ꢏ Single, one ꢈꢂlse ꢈer tooth
ꢏ
ꢐalley ꢒnorth ꢈole-soꢂth ꢈoleꢓ ꢈair
ꢍ ꢏ ꢍꢂal, one ꢈꢂlse ꢈer each tooth and each ꢐalley ꢒeach magnetic ꢈoleꢓ
Rotation ꢍirectionꢎ
ꢖ ꢏ ꢖorward, t
R ꢏ Reꢐerse, t
with target moꢐement ꢁrom ꢈin 1 to ꢗ
with target moꢐement ꢁrom ꢈin ꢗ to 1
wꢒꢖꢑꢍꢓ
wꢒꢖꢑꢍꢓ
Allegro ꢋdentiꢁier and ꢍeꢐice ꢆyꢈeꢎ A1ꢃ93
ꢚꢈerating ꢆemꢈeratꢂre Rangeꢎ ꢄ
Pacꢙage ꢍesignationꢎ ꢅ
ꢋnstrꢂctions ꢒPacꢙingꢓꢎ ꢆN ꢏ ꢆaꢈe and reel, ꢗ000 ꢈieces ꢈer 13-in. reel
All variants: Target configuration is ring magnet, device should be back-biased for ferromagnetic target operation.
2
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
VCC
Notes
Rating
28
Unit
V
Supply Voltage
Refer to Power Derating section
Reverse Supply Voltage
Reverse Output Voltage
Output Sink Current
VRCC
VROUT
IOUT
–18
V
–0.5
V
25
mA
°C
°C
°C
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
TA
L temperature range
–40 to 150
165
TJ(max)
Tstg
–65 to 170
Terminal List Table
Pinout Diagram
Number
Name
Function
1
VCC
Supply voltage
2
OUT
Open collector output
3
4
TEST
GND
Test pin: float *
Ground
*Connection of TEST to VCC and/or GND may cause undesired additional
current consumption in the IC.
1
2
3
4
3
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
OPERATING CHARACTERISTICS: Valid throughout full operating and temperature ranges, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit [2]
GENERAL ELECTRICAL CHARACTERISTICS
Supply Voltage [3]
VCC
VCC(UV)
IRCC
Operating, TJ < TJ(max)
4
–
–
3.6
–
24
3.95
–
V
V
Under Voltage Lockout
Reverse Supply Current [4]
Supply Zener Clamp Voltage
Supply Current
VCC 0 → 5 V or 5 → 0 V
VCC = VRCC(max)
–10
28
5
mA
V
VZ(SUPPLY) ICC = ICC(max) + 3 mA, TA = 25°C
–
–
ICC
–
12
–
mA
V
Test Pin Zener Clamp Voltage [5]
Power-On State
VZ(TEST)
–
6
POS
tr
Output, when connected as in Figure 10
–
High
–
–
RPULLUP = 825 Ω, CLOAD = 4.7 nF, 10% to 90%,
connected as in Figure 10
Output Rise Time
Output Fall Time
–
–
10
–
–
µs
µs
RPULLUP = 825 Ω, CLOAD = 4.7 nF, 90% to 10%,
connected as in Figure 10
tf
0.9
OUTPUT STAGE
Low Output Voltage
VOUT(sat) ISINK = 10 mA, Output = On
VZOUT
–
26.5
25
–
200
–
500
–
mV
V
Output Zener Clamp Voltage
Output Current Limit
Output Leakage Current
Ilim
VOUT = 12 V, TJ < TJ(max)
Output =Off, VOUT = 24 V
45
–
70
10
mA
µA
IOFF
OUTPUT PULSE CHARACTERISTICS [6]
N (Narrow) option
W (Wide) option
N (Narrow) option
W (Wide) option
N (Narrow) option
38
42
45
50
52
58
μs
μs
μs
μs
μs
Pulse Width (Forward Rotation)
tw(FWD)
76
90
104
173
414
Pulse Width (Reverse Rotation)
Pulse Width (Non-Direction)
tw(REV)
tw(ND)
127
306
150
360
GENERAL OPERATING CHARACTERISTICS
Operate Point
Release Point
BOP
BRP
% of peak-to-peak IC-processed signal
% of peak-to-peak IC-processed signal
S (Single) option
–
–
0
0
0
0
0
0
0
0
69
31
–
–
–
%
%
11.1
5.6
7
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
Operating Frequency
(Forward Rotation) [7][8]
fFWD
D (Dual) option
–
NS (Narrow, Single) options
ND (Narrow, Dual) options
WS (Wide, Single) options
WD (Wide, Dual) options
S (Single) option
–
–
3.5
4.7
3.5
2.2
1.1
Operating Frequency
(Reverse Rotation) [7][8]
fREV
–
–
–
Operating Frequency
(Non-Direction Pulses) [7][8]
fND
D (Dual) option
–
DAC CHARACTERISTICS
Magnitude valid for both differential magnetic
channels
Allowable User-Induced Offset
BOFFSET
–300
–
300
G
Continued on the next page…
4
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit [2]
PERFORMANCE CHARACTERISTICS
Peak to peak differential signal, valid for each
magnetic channel
Operating Differential Magnetic Input [9] BDIFF(pk-pk)
30
–
–
–
–
–
1200
G
–
–
–
–
Option H, see Figure 1
Option L, see Figure 1
Option H, see Figure 1
Option L, see Figure 1
TCYCLE
–
–
–
–
Vibration Immunity (Startup)
errVIB(SU)
0.5 ×
TCYCLE
TCYCLE
Vibration Immunity (Running Mode)
errVIB
0.5 ×
TCYCLE
INPUT MAGNETIC CHARACTERISTICS
Allowable Differential Sequential
Signal Variation [10]
BSEQ(n+1)
BSEQ(n)
/
Signal cycle-to-cycle variation (see Figure 3)
0.6
20
–
–
–
–
–
Minimum separation between channels as
a percentage of signal amplitude at each
switchpoint (see Figure 2)
Switchpoint Separation
VSP(sep)
% pk-pk
CALIBRATION
Option H: Amount of target
B
DIFF(pk-pk) < 1200 G
2 ×
TCYCLE
<3 ×
TCYCLE
–
–
–
–
rotation (constant direction)
following power-on until first
electrical output pulse of
either tw(FWD) or tw(REV), see
Figure 1
BDIFF(pk-pk) > 60 G
B
DIFF(pk-pk) < 60 G
2.5 ×
TCYCLE
<4 ×
TCYCLE
BDIFF(pk-pk) > 30 G
First Direction Output Pulse [11]
Option L: Amount of target
rotation (constant direction)
following power-on until first
electrical output pulse of
either tw(FWD) or tw(REV) , see
Figure 1
1.8 ×
TCYCLE
2.2 ×
TCYCLE
–
–
Option H: Amount of target rotation (constant
direction) following event until first electrical output
pulse of either tw(FWD) or tw(REV), see Figure 1
1 ×
TCYCLE
2 ×
TCYCLE
<3 ×
TCYCLE
–
–
–
–
First Direction Pulse Output Following
Direction Change
NCD
Option L: Amount of target rotation (constant
direction) following event until first electrical output
pulse of either tw(FWD) or tw(REV), see Figure 1
2 ×
TCYCLE
–
–
Option H: Amount of target rotation (constant
direction) following event until first electrical output
pulse of either tw(FWD) or tw(REV), see Figure 1
1 ×
TCYCLE
2 ×
TCYCLE
<3 ×
TCYCLE
First Direction Pulse Output Following
Running Mode Vibration
Option L: Amount of target rotation (constant
direction) following event until first electrical output
pulse of either tw(FWD) or tw(REV), see Figure 1
2 ×
TCYCLE
–
–
[1] Typical values are at TA = 25°C and VCC = 12 V. Performance may vary for individual units, within the specified maximum and minimum limits.
[2] 1 G (gauss) = 0.1 mT (millitesla).
[3] Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.
[4] Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.
[5] Sustained voltages beyond the clamp voltage may cause permanent damage to the IC.
[6] Load circuit is CL = 10 pF and RPULLUP = 1.2 kΩ. Pulse duration measured at a threshold of VPULLUP / 2.
[7] Maximums of both Operating Frequency (Reverse Rotation) and Operating Frequency (Non-Direction Pulses) are determined by satisfactory separation of output pulses:
VOUT(HIGH) of tw(FWD)(min). If the customer can resolve shorter high-state durations, maximum fREV and fND may be increased.
[8] Frequency of TCYCLE
.
[9] Differential magnetic field is measured for Channel A (E1-E2) and Channel B (E2-E3) independently. Each channel’s differential magnetic field is measured between two
Hall elements with spacing shown in package drawing. Magnetic field is measured orthogonally to the front of the package.
[10] If the minimum signal phase separation is not maintained during or after a signal variation event, output may be blanked or non-direction pulses may occur. A signal
variation event during power-on may increase the quantity of edges required to get correct direction pulses.
[11] Power-on frequency ≤ 200 Hz. Higher power-on frequencies may require more input magnetic cycles until directional output pulses are achieved.
5
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
Target
S
N
S
N
TCYCLE
BDIFF
BDIFF = Differential Input Signal; the differential magnetic
flux sensed by the sensor
TCYCLE = Target Cycle; the amount of rotation that
moves one north pole and one south pole
across the sensor
Figure 1: Definition of TCYCLE
B
SEQ(n)
S
N
S
N
B
SEQ(n+1)
TCYCLE
BDIFF(SP)
BDIFF(BOP)
(BOP
)
Channel B
BDIFF(pk-pk)
(BRP
)
BDIFF(BRP)
BDIFF(SP)
Channel A
BDIFF(SP)
BDIFF(pk-pk)
BDIFF(SP-SEP)
=
Figure 2: Definition of Switchpoint Separation
Figure 3: Definition of Differential Signal Variation
6
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
THERMAL CHARACTERISTICS: May require derating at maximum conditions; see Power Derating section
Characteristic
Symbol
Test Conditions*
Value
Unit
Single layer PCB, with copper limited to solder pads
126
°C/W
Package Thermal Resistance
RθJA
Single layer PCB, with copper limited to solder pads and 3.57 in.2
(23.03 cm2) copper area each side
84
°C/W
*Additional thermal information available on the Allegro website
Power Derating Curve
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
V
CC(max)
(RθJA = 84 °C/W)
(RθJA = 126 °C/W)
8
7
6
5
4
V
CC(min)
3
2
20
40
60
80
100
120
140
160
180
Temperature (°C)
Power Dissipation versus Ambient Temperature
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
RθJA = 84 ºC/W
800
700
600
500
400
RθJA = 126 ºC/W
300
200
100
0
20
40
60
80
100
120
140
160
180
Temperature,T (°C)
A
7
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
FUNCTIONAL DESCRIPTION
Sensing Technology
Data Protocol Description
The sensor IC contains a single-chip Hall-effect circuit that
supports a trio of Hall elements. These elements are used in
differential pairs to provide electrical signals containing infor-
mation regarding edge position and direction of target rotation.
The A1693 is intended for use with ring magnet targets or, when
back-biased with an appropriate magnet, with ferrous targets.
When a target passes in front of the device (opposite the branded
face of the package case), the A1693 generates output pulses for
features of the target (refer to Timing section). Speed information
is provided by the output pulse rate, while direction of target rota-
tion is provided by the duration of the output pulses. The sensor
IC can sense target movement in both the forward and reverse
directions.
After proper power is applied to the sensor IC, it is capable of
providing digital information that is representative of the mag-
netic features of a rotating target. The waveform diagrams in
Figure 5 present the automatic translation of the target profiles,
through their induced magnetic profiles, to the digital output
signal of the sensor IC.
Forward Rotation (see Figure 4): Forward rotation is indicated
on the output by a tw(FWD) pulse with. With the -Fxxxxx variant,
a magnetic pole passing the sensor IC from pin 1 to 4 is defined
as forward rotation. With the -Rxxxxx variant, forward rotation
occurs for target motion from pin 4 to 1.
Reverse Rotation (see Figure 4): Reverse rotation is indicated
on the output by a tw(REV) pulse with. With the -Fxxxxx variant,
a magnetic pole passing the sensor IC from pin 4 to 1 is defined
as reverse rotation. With the -Rxxxxx variant, reverse rotation
occurs for target motion from pin 1 to 4.
Direction Detection
The sensor IC compares the relative phase of its two differential
channels to determine in which direction the target is moving.
The relative switching order is used to determine the direction,
which is communicated through the output protocol.
Pin 4
Pin 1
Branded Face
of K Package
Rotating Target
N
S
S
N
N
S
N
S
(A) Forward Rotation (for -Rxxxxx variant)
Branded Face
of K Package
Rotating Target
N
S
S
N
N
S
S
N
Pin 1
(B) Reverse Rotation (for -Rxxxxx variant)
Pin 4
Figure 4: Target Orientation Relative to Device
8
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
ꢉarget
Pacꢆage ꢃase
Pacꢊage ꢅase ꢀranded ꢋace
Device Orientation to Target
ꢅranded ꢇace
Device Orientation to Target
ꢀPin 1
Sideꢁ
ꢀꢉoꢊ ꢋiew oꢌ
Pacꢆage ꢃaseꢁ
ꢀPin ꢂ
Sideꢁ
ꢄ3 ꢄꢎ ꢍꢃ
ꢄ1
ꢄꢅ
ꢉ3
ꢉꢐ
ꢉ1
ꢆPin ꢈ Sideꢇ
ꢆꢃoꢎ ꢂiew oꢏ
ꢆPin 1 Sideꢇ
ꢅacꢆꢈiasing
Magnet
Soꢑth Pole
ꢅhannel ꢀ
ꢉlement Pitch
ꢅhannel A
ꢉlement Pitch
ꢃhannel ꢅ
ꢄlement Pitch
ꢃhannel A
ꢄlement Pitch
Pacꢊage ꢅaseꢇ
North Pole
Mechanical Position (Target moves past device pin 1 to pin 4)
Mechanical Position (Target moves past device pin 1 to pin 4)
ꢃarget
ꢃhis ꢎole
ꢃhis ꢎole
ꢆRadial Ring Magnetꢇ
sensed later
sensed earlier
ꢉhis tooth
ꢉhis tooth
sensed earlier
sensed later
ꢀ
S
ꢀ
Target Magnetic Profile
ꢅhannel
ꢉlement Pitch
Target Magnetic Profile
ꢐꢅ
ꢌꢀ
ꢍꢀ
IC Internal Differential Analog Signals
IC Internal Differential Analog Signals
ꢀꢁP
ꢅꢏP
ꢀꢁP
ꢅꢏP
A ꢃhannel
A ꢅhannel
ꢀRP
ꢅRP
ꢀꢁP
ꢅꢏP
ꢀ ꢅhannel
ꢅ ꢃhannel
ꢀRP
ꢅRP
Detected Channel Switching
Detected Channel Switching
A ꢅhannel
A ꢃhannel
ꢀ ꢅhannel
ꢅ ꢃhannel
Device Output Signal
Device Output Signal
ꢂꢁUꢃ
ꢋꢏUꢉ
(B) Ferromagnetic Target
(with backbiasing magnet)
(A) Ring Magnet Target
Figure 5: The magnetic profile reflects the features of the target,
allowing the sensor IC to present an accurate digital output. (Option S shown)
9
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
Timing As shown in Figure 6, the pulse appears at the output
slightly before the sensed magnetic edge traverses the pack-
age branded face. With the -FSxxxH option and for targets in
forward rotation, this shift, Δfwd, results in the pulse corre-
sponding to the magnetic north region with the sensed magnetic
edge, and for targets in reverse rotation, the shift, Δrev, results
in the pulse corresponding to the magnetic south region with the
sensed edge. The sensed magnetic edge that stimulates output
pulses is kept the same for both forward and reverse rotation by
using only one channel to control output switching.
(A) -FSNxxH variant
Forward Rotation
Reverse Rotation
N
S
∆fwd
45 µs
t
w(FWD)
t
t
Output Pulse
(Forward Rotation)
With the -RSxxxH option, the shift direction is inverted and the
output pulse occurs on the opposite side of the sensed edge. For
targets in forward rotation, this shift, Δfwd, results in the pulse
corresponding to the magnetic south region with the sensed
magnetic edge, and for targets in reverse rotation, the shift,
Δrev, results in the pulse corresponding to the magnetic north
region with the sensed edge.
∆rev
t
90 µs
w(REV)
Output Pulse
(Reverse Rotation)
(B) -FDNxxH variant
∆fwd
45 µs
∆fwd
With the L option, the IC dynamically selects the switchpoint
for the output to minimize the calibration duration. Leav-
ing each calibration mode, whether after power-on, direction
change, or detected vibration, the IC selects either BOP or BRP
from either A or B channel (see Figure 5) as the trigger for the
output pulse. Note that for the D option, both BOP and BRP from
one channel are used. The switchpoint selection is retained until
the next calibration mode is reached, at which point the best
switchpoint will again be selected. As a result, the sensed mag-
netic edge that stimulates output pulses can change, but speed
information is not compromised.
t
t
45 µs
w(FWD)
w(FWD)
t
Output Pulse
(Forward Rotation)
∆rev
∆rev
t
90 µs
t
90
w(REV)
w(REV)
t
Output Pulse
(Reverse Rotation)
Figure 6: Output Protocol
Direction Validation
Following a direction change in Running mode, output pulses
have a width of tw(ND) until direction information is validated.
An example of the waveforms is shown in Figure 7. tw(ND) is
not present when using the non-pulse variant (Option B).
Target Rotation Forward
Target Rotation Reverse
N
S
N
S
S
N
S
N
Target
Differential
Magnetic
Profile
V
tW(FWD)
tW(FWD)
tW(ND)
tW(REV)
OUT
t
Figure 7: Example of direction change in Running mode F, S, P and H options
10
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
Automatic Offset Adjustment (AOA) is circuitry that compen-
sates for the effects of chip, magnet, and installation offsets.
Start-Up Detection / Calibration
When power is applied to the A1693, the sensor IC internally
detects the profile of the target. The gain and offset of the
detected signals are adjusted during the calibration period, nor-
malizing the internal signal amplitude for the air gap range of the
device.
This circuitry works with the AGC during calibration to adjust
PROC in the internal A-to-D range to allow for acquisition of
V
signal peaks. AOA and AGC function separately on the two
differential signal channels.
Direction information is available after calibration is complete.
Figure 8 shows where the first output edges may occur for vari-
ous starting target phases. tw(ND) pulses are not present with the O
variant (Blanked).
The Automatic Gain Control (AGC) feature ensures that opera-
tional characteristics are isolated from the effects of installation
air gap variation.
Target Rotation
N
S
N
S
N
S
N
S
N
Target
Differential
Magnetic
Profile
tW(ND)
tW(ND)
tW(ND)
tW(ND)
tW(FWD) or
tW(REV)
tW(FWD) or
tW(REV)
Opposite
north pole
tW(FWD) or
tW(REV)
tW(FWD) or
tW(REV)
tW(ND)
tW(ND)
Opposite
N→S boundary
tW(FWD) or
tW(REV)
tW(FWD) or
tW(REV)
I
CC
Opposite
south pole
tW(FWD) or
tW(REV)
tW(ND)
tW(ND)
Opposite
t
S→N boundary
Device Location at Power-On
Figure 8: Start-up position effect on first device output switching (Option Y shown: pulse-in-calibration)
11
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
Vibration Detection
Algorithms embedded in the IC digital controller detect the
presence of target vibration through analysis of the two magnetic
input channels.
With the pulses-in-Running mode (Option P) variant, in the pres-
ence of vibration, output pulses of tw(ND) may occur or no pulses
may occur, depending on the amplitude and phase of the vibration
(Figure 9). Output pulses have a width of tw(ND) until direction
information is validated on constant target rotation. With the non-
pulse (Option B) variant, no tw(ND) pulses will be present.
Normal Target Rotation
Vibration
Normal Target Rotation
N
S
N
S
S
N
S
N
Target
Differential
Magnetic
Profile
tW(FWD)
tW(FWD)
tW(FWD)
[ or tW(REV) ]
tW(ND)
tW(ND)
tW(ND)
[ or tW(REV) ]
[ or tW(REV) ]
...
...
...
tW(FWD)
t
W(FWD)
tW(FWD)
tW(ND)
tW(ND)
[ or tW(REV) ]
[ or tW(REV) ]
[ or tW(REV) ]
Figure 9: Output functionality in the presence of Running mode target vibration, P option
12
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
APPLICATION INFORMATION
Power Derating
The device must be operated below the maximum junction
temperature of the device, TJ(max). Under certain combinations of
peak conditions, reliable operation may require derating supplied
power or improving the heat dissipation properties of the appli-
cation. This section presents a procedure for correlating factors
affecting operating TJ. (Thermal data is also available on the
Allegro website.)
Example: Reliability for VCC at TA=150°C, package K, using a
single-layer PCB.
Observe the worst-case ratings for the device, specifically:
RθJA=177 °C/W, TJ(max) =165°C, VCC(max) =24 V, and
ICC(max) = 12 mA.
Calculate the maximum allowable power level, PD(max). First,
invert equation 3:
The Package Thermal Resistance, RθJA, is a figure of merit sum-
marizing the ability of the application and the device to dissipate
heat from the junction (die), through all paths to the ambient air.
Its primary component is the Effective Thermal Conductivity, K,
of the printed circuit board, including adjacent devices and traces.
Radiation from the die through the device case, RθJC, is relatively
small component of RθJA. Ambient air temperature, TA, and air
motion are significant external factors, damped by overmolding.
ΔTmax = TJ(max) – TA = 165°C–150°C = 15°C
This provides the allowable increase to TJ resulting from internal
power dissipation. Then, invert equation 2:
PD(max) = ΔTmax ÷RθJA =15°C÷177 °C/W=84.7 mW
Finally, invert equation 1 with respect to voltage:
ꢀ VCC(est) = PD(max) ÷ ICC(max)= 84.7 mW÷12 mA= 7.1 V
The result indicates that, at TA, the application and device can
dissipate adequate amounts of heat at voltages ≤VCC(est).
The effect of varying power levels (Power Dissipation, PD), can
be estimated. The following formulas represent the fundamental
relationships used to estimate TJ, at PD.
Compare VCC(est) to VCC(max). If VCC(est) ≤ VCC(max), then
reliable operation between VCC(est) and VCC(max) requires
enhanced RθJA. If VCC(est) ≥ VCC(max), then operation between
VCC(est) and VCC(max) is reliable under these conditions.
PD = VIN
I
(1)
(2)
(3)
×
IN
ꢀ
ꢀ
ΔT = PD
R
θJA
×
TJ = TA + ΔT
For example, given common conditions such as: TA= 25°C,
VCC = 12 V, ICC = 6.5 mA, and RθJA = 177 °C/W, then:
PD = VCC
I
= 12 V 6.5 mA = 78 mW
CC
×
×
VCC
V
PULLUP
ꢀ
ΔT = PD
R
= 78 mW 177 °C/W = 13.8°C
θJA
×
×
TJ = TA + ΔT = 25°C + 13.8°C = 38.8°C
R
PULLUP
A1693
A worst-case estimate, PD(max), represents the maximum allow-
able power level (VCC(max), ICC(max)), without exceeding
TJ(max), at a selected RθJA and TA.
1
2
VCC
VOUT
C
TEST
3
C
GND
BYPASS
L
0.1 μF
4
(Required)
Figure 10: Typical Application Circuit
13
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
Package K, 4-Pin SIP
ꢯ0ꢂ0ꢅ
ꢰ0ꢂ0ꢄ
ꢄꢂ21
B
ꢀꢄꢌ
ꢁ
1ꢂꢃꢄ
ꢁ
1ꢂꢄꢄ ꢱ0ꢂ0ꢄ
1ꢂꢃꢄ
D
ꢇꢇꢇꢇ
1ꢂ32
ꢁ
ꢉꢝꢘꢛ ꢁꢭꢑꢍꢎꢝꢒ
ꢮꢏꢙ Iꢙꢛꢑꢙꢎ
ꢫꢫꢤꢤ
ꢯ0ꢂ0ꢅ
ꢰ0ꢂ0ꢄ
3ꢂꢀ3
ꢁ3
ꢁ2
ꢁ1
1
ꢀꢄꢌ
0ꢂꢅꢀ ꢆꢁF
Bꢒꢓꢙꢛꢑꢛ
Fꢓꢍꢑ
ꢨꢎꢓꢙꢛꢓꢒꢛ Bꢒꢓꢙꢛꢏꢙꢣ ꢆꢑꢡꢑꢒꢑꢙꢍꢑ ꢩꢏꢑꢧ
ꢠ
2ꢂ16
ꢉꢊꢋ
ꢇ ꢪ Dꢑꢐꢏꢍꢑ pꢓꢒꢎ ꢙꢟꢖꢞꢑꢒ
ꢫ ꢪ ꢬꢓꢚꢎ ꢎꢧꢝ ꢛꢏꢣꢏꢎꢚ ꢝꢡ ꢢꢑꢓꢒ ꢝꢡ ꢖꢓꢙꢟꢡꢓꢍꢎꢟꢒꢑ
ꢤ ꢪ ꢤꢑꢑk ꢝꢡ ꢖꢓꢙꢟꢡꢓꢍꢎꢟꢒꢑ
ꢊ
Fꢝꢒ ꢆꢑꢡꢑꢒꢑꢙꢍꢑ ꢈꢙꢘꢢꢜ ꢙꢝꢎ ꢡꢝꢒ ꢎꢝꢝꢘꢏꢙꢣ ꢟꢚꢑ (ꢒꢑꢡꢑꢒꢑꢙꢍꢑ DꢤG-ꢥ010)
Dꢏꢖꢑꢙꢚꢏꢝꢙꢚ ꢏꢙ ꢖꢏꢘꢘꢏꢖꢑꢎꢑꢒꢚ
Dꢏꢖꢑꢙꢚꢏꢝꢙꢚ ꢑꢦꢍꢘꢟꢚꢏꢐꢑ ꢝꢡ ꢖꢝꢘꢛ ꢡꢘꢓꢚꢔꢕ ꢣꢓꢎꢑ ꢞꢟꢒꢒꢚꢕ ꢓꢙꢛ ꢛꢓꢖꢞꢓꢒ pꢒꢝꢎꢒꢟꢚꢏꢝꢙꢚ
ꢁꢦꢓꢍꢎ ꢍꢓꢚꢑ ꢓꢙꢛ ꢘꢑꢓꢛ ꢍꢝꢙꢡꢏꢣꢟꢒꢓꢎꢏꢝꢙ ꢓꢎ ꢚꢟppꢘꢏꢑꢒ ꢛꢏꢚꢍꢒꢑꢎꢏꢝꢙ ꢧꢏꢎꢔꢏꢙ ꢘꢏꢖꢏꢎꢚ ꢚꢔꢝꢧꢙ
1
2
3
ꢀ
Dꢓꢖꢞꢓꢒ ꢒꢑꢖꢝꢐꢓꢘ pꢒꢝꢎꢒꢟꢚꢏꢝꢙ (ꢅꢋ)
A
B
C
1ꢀꢂꢃ3 ꢱ0ꢂꢄ1
Gꢓꢎꢑ ꢓꢙꢛ ꢎꢏꢑ ꢞꢓꢒ ꢞꢟꢒꢒ ꢓꢒꢑꢓ
Bꢒꢓꢙꢛꢏꢙꢣ ꢚꢍꢓꢘꢑ ꢓꢙꢛ ꢓppꢑꢓꢒꢓꢙꢍꢑ ꢓꢎ ꢚꢟppꢘꢏꢑꢒ ꢛꢏꢚꢍꢒꢑꢎꢏꢝꢙ
ꢯ0ꢂ06
ꢰ0ꢂ03
ꢯ0ꢂ0ꢃ
ꢰ0ꢂ0ꢄ
0ꢂ3ꢅ
0ꢂꢀ1
ꢊꢍꢎꢏꢐꢑ ꢊꢒꢑꢓ Dꢑpꢎꢔꢕ 0ꢂꢀ2 ꢖꢖ
D
ꢁ
ꢗꢓꢘꢘ ꢑꢘꢑꢖꢑꢙꢎꢚ (ꢁ1ꢕ ꢁ2ꢕ ꢓꢙꢛ ꢁ3)ꢜ ꢙꢝꢎ ꢎꢝ ꢚꢍꢓꢘꢑ
1ꢂ2ꢃ ꢇꢈꢉ
14
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Vibration-Tolerant Hall-Effect
Transmission Speed and Direction Sensor IC
A1693
Revision History
Number
Date
Description
–
April 24, 2019
Initial release
Copyright 2019, Allegro MicroSystems.
Allegro MicroSystems reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit
improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of
Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems assumes no responsibility for its use; nor
for any infringement of patents or other rights of third parties which may result from its use.
Copies of this document are considered uncontrolled documents.
For the latest version of this document, visit our website:
www.allegromicro.com
15
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明