A1699
Two-Wire, Differential, Vibration-Resistant
Sensor IC with Speed and Direction Output
FEATURES AND BENEFITS
• Integrated IC and capacitor, single overmolded package
to reduce external EMI-protection requirements
• Two-wire, pulse-width output protocol
• Highly configurable output protocol options
• Digital output representing target profile
• Speed and direction information of target
• Vibration tolerance
□
Small-signal lockout for small amplitude vibration
□
Proprietary vibration detection algorithms for large
amplitude vibration
• Air-gap-independent switchpoints
• Large operating air gap capability
• Undervoltage lockout
• True zero-speed operation
• Wide operating voltage range
• AEC-Q100 automotive qualified
• Robust test-coverage capability with Scan Path and
IDDQ measurement
DESCRIPTION
The A1699 is an optimized Hall-effect integrated circuit (IC)
that provides a user-friendly solution for direction detection
and true zero-speed, digital ring-magnet sensing. The small
package can be easily assembled and used in conjunction with
a wide variety of target sensing applications.
The IC employs patented algorithms for the special operational
requirements of automotive transmission applications. The
speed and direction of the target are communicated through a
variable pulse-width output protocol. The A1699 is particularly
adept at handling vibration without sacrificing maximum air
gap capability or creating any erroneous direction information.
The advanced vibration detection algorithm will systematically
calibrate the sensor IC on the initial magnetic poles of true
target rotation and not on vibration, always guaranteeing an
accurate signal in running mode.
Advanced signal processing and innovative algorithms make
the A1699 an ideal solution for a wide range of speed- and
direction-sensing needs.
The A1699 is provided in a 2-pin miniature SIP package
(suffix UB) that is lead (Pb) free, with tin leadframe plating.
The UB package includes an IC and capacitor integrated into a
single overmolded package to reduce external EMI protection
requirements.
Package: 2-Pin SIP (Suffix UB)
Not to scale
VCC
Regulator
(Analog)
Regulator
(Digital)
Hall Amp
Offset
Adjust
AGC
Filter
ADC
Synchronous
Digital Controller
Output
Control
Hall Amp
Offset
Adjust
AGC
Filter
ADC
GND
Functional Block Diagram
A1699-DS, Rev. 7
A1699
Two-Wire, Differential, Vibration-Resistant
Sensor IC with Speed and Direction Output
Complete Part
Number Format
Configuration
A1699 L UB TN -X X X X X -T
Allegro Identifier and Device Type
Operating Temperature Range
Package Designation
Instructions (Packing)
Leadframe Plating
Allegro Identifier and Device Type
Operating Temperature Range
Package Designation
Instructions (Packing)
Rotation Direction
Number of Pulses
Configuration
Reverse Pulse
Width
Calibration Pulses
Vibration Immunity
/ Direction Change
Leadframe Plating
For example: A1699LUBTN-RSNPL-T
Where a configuration character is unspecified, “x” will be used. For example, -xSNPL applies to both
Rotation Direction configuration variants.
[A1699]
[L]
[UB] 2-pin plastic SIP
[TN] Tape and reel
[-F] pin 1-to-2 forward or
[-R] pin 2-to-1 forward
[S] single, one pulse per magnetic pole pair or
[D] dual, one pulse for each north and south pole
[N] 90 µs (narrow) or
[W] 180 µs (wide)
[B] Blanked, no output during Calibration or
[P] Pulses during Calibration
[L] Low vibration immunity with immediate
direction change detection or
[H] High vibration immunity with non-direction
pulses
[T] Lead (Pb) free
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
A1699
Two-Wire, Differential, Vibration-Resistant
Sensor IC with Speed and Direction Output
SPECIFICATIONS
SELECTION GUIDE
Part Number
A1699LUBTN–xxxxx–T
*Contact Allegro™ for additional packing options.
Packing*
4000 pieces per 13-in. reel
ABSOLUTE MAXIMUM RATINGS*
Characteristic
Supply Voltage
Reverse Supply Voltage
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V
CC
V
RCC
T
A
T
J
(max)
T
stg
L temperature range
Notes
Refer to Power Derating Section
Rating
28
–18
–40 to 150
165
–65 to 170
Unit
V
V
ºC
ºC
ºC
INTERNAL DISCRETE CAPACITOR RATINGS
Characteristic
Nominal Capacitance
Symbol
C
SUPPLY
Test Conditions
Connected between VCC and GND
Value (Typ.)
10000
Unit
pF
Terminal List Table
Name
VCC
GND
Number
1
2
Supply Voltage
Ground
Function
1
2
Package UB, 2-Pin SIP Pinout Diagram
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
A1699
Two-Wire, Differential, Vibration-Resistant
Sensor IC with Speed and Direction Output
OPERATING CHARACTERISTICS
: Valid throughout full operating and temperature ranges, unless otherwise specified
Characteristic
ELECTRICAL CHARACTERISTICS
Supply Voltage
2
Undervoltage Lockout
Reverse Supply Current
3
Supply Zener Clamp Voltage
V
CC
V
CC(UV)
I
RCC
V
ZSUPPLY
I
CC(LOW)
Supply Current
I
CC(HIGH)
I
CC(SU)
(LOW)
Symbol
Test Conditions
Operating, T
J
< T
J
(max)
V
CC
transitioning from 0 → 5 V or 5 → 0 V
V
CC
= V
RCC
(max)
I
CC
= I
CC
(max) + 3 mA, T
A
= 25ºC
Low-current state (running mode)
High-current state (running mode)
Low-current level (calibration) and Power-on
mode
Measured as a ratio of high current to low
current
ΔI/Δt from 10% to 90% I
CC
level; Corresponds to
measured output slew rate with C
SUPPLY
ΔI/Δt from 90% to 10% I
CC
; Corresponds to
measured output slew rate with C
SUPPLY
Min.
4
–
–
28
5
12
5
1.9
Typ.
1
–
3.6
–
–
–
–
–
–
Max.
24
3.95
–10
–
8
16
8.5
–
Unit
V
V
mA
3
V
mA
mA
mA
–
Supply Current Ratio
OUTPUT
Output Rise Time
Output Fall Time
OUTPUT PULSE CHARACTERISTICS
4
Pulse Width, Forward Rotation
Pulse Width, Reverse Rotation
Pulse Width, Non-Direction
I
CC(HIGH)
/
I
CC(LOW)
t
r
t
f
–
–
2
2
4
4
μs
μs
t
w(FWD)
t
w(REV)
t
w(ND)
-xxNxx variant
-xxWxx variant
-xxNPx and -xxNxH variants
-xxWPx and -xxWxH variants
38
76
153
153
306
45
90
180
180
360
52
104
207
207
414
μs
μs
μs
μs
μs
Continued on the next page…
V
S
1 VCC
C
SUPPLY
A1699
C
L
2 GND
V
OUT
R
L
Figure 1: Typical Application Circuit
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
A1699
Two-Wire, Differential, Vibration-Resistant
Sensor IC with Speed and Direction Output
OPERATING CHARACTERISTICS
(continued): Valid throughout full operating and temperature ranges, unless otherwise
specified
Characteristic
OPERATING CHARACTERISTICS
Operate Point
Release Point
Operating Frequency, Forward
Rotation
B
OP
B
RP
f
FWD
% of peak-to-peak IC-processed magnetic signal
% of peak-to-peak IC-processed magnetic signal
-xSxxx variant
-xDxxx variant
-xSNxx variant
Operating Frequency, Reverse
Rotation
5
f
REV
-xDNxx variant
-xSWxx variant
-xDWxx variant
-xSNxx variant
Operating Frquency, Non-Direction
Pulses
5
DAC CHARACTERISTICS
Allowable User-Induced Offset
PERFORMANCE CHARACTERISTICS
Operational Magnetic Range
Vibration Immunity (Startup)
B
IN
ErrVIB(SU)
Symbol
Test Conditions
Min.
–
–
0
0
0
0
0
0
0
0
0
0
Typ.
1
69
31
–
–
–
–
–
–
–
–
–
–
Max.
–
–
12
6
7
3.5
4
2
4
2
2.2
1.1
Unit
%
%
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
f
ND
-xDNxx variant
-xSWxx variant
-xDWxx variant
Magnitude valid for both differential magnetic
channels
Peak to peak differential signal; valid for each
magnetic channel.
See Figure 2
-xxxxL variant
-xxxxH variant
-xxxxL variant
-xxxxH variant
Optimized value, for ring magnet
–300
–
300
G
30
T
TARGET
T
TARGET
0.12 ×
T
TARGET
T
TARGET
–
–
–
–
–
–
–0.2
1200
–
–
–
–
–
G
deg.
deg.
deg.
deg.
%/°C
Vibration Immunity (Running Mode)
Magnetic Temperature Coefficient
1
Typical
2
Maximum
Err
VIB
TC
MAG
See Figure 2
values are at T
A
= 25°C and V
CC
= 12 V. Performance may vary for individual units, within the specified maximum and minimum limits.
voltage must be adjusted for power dissipation and junction temperature; see representative discussions in Power Derating section.
3
Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.
4
Load circuit is RL = 100 Ω and CL = 10 pF. Pulse duration measured at threshold of ( (I
CC(HIGH)
+ I
CC(LOW)
) /2).
5
Maximum Operating Frequency is determined by satisfactory separation of output pulses: I
CC(LOW)
of tw
(FWD)(MIN)
. If the customer can resolve shorter low-state durations,
maximum f
REV
and f
ND
may be increased.
Target
S
N
T
TARGET
T
VPROC
S
N
V
PROC(BOP)
V
PROC(pk-pk)
V
SP
(B
OP
)
V
PROC(BRP)
V
SP
360º (degrees prime)
V
PROC
(B
RP
)
V
SP(sep)
=
V
SP
V
PROC(pk-pk)
V
PROC
= the processed analog signal of the sinusoidal magnetic input (per channel)
T
TARGET
= the period between successive sensed target magnetic edges of the same
polarity (either both north-to-south or both south-to-north)
Figure 2: Definition of T
TARGET
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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