Speed Sensor. VG481V1 Datasheet

VG481V1 Sensor. Datasheet pdf. Equivalent

VG481V1 Datasheet
Recommendation VG481V1 Datasheet
Part VG481V1
Description Hall-effect Speed Sensor
Feature VG481V1; VG481V1 Back Biased Hall-effect Speed Sensor Integrated Circuit (IC) DESCRIPTION The VG481V1 contai.
Manufacture Honeywell
Datasheet
Download VG481V1 Datasheet




Honeywell VG481V1
VG481V1
Back Biased Hall-effect Speed Sensor Integrated Circuit (IC)
DESCRIPTION
The VG481V1 contains a dual peak
detecting circuit that is coupled with a
Hall-effect element to detect the speed
of a ferrous gear tooth target wheel. A
biasing magnet provides a changing
magnetic field as the target wheel
moves past the senor IC. The sensor IC
functions in reference to peak and slot
magnetic levels. The sensor IC output is
in either a high state or a low state, which
corresponds to the target tooth/slot
features. The VG481V1 IC consists of a
voltage regulator, clock/oscillator, Hall-
element, amplifier, internal peak/valley
track and hold circuits, comparator, and
open collector output stage. The sensor
IC is protected from abnormal operation
at low voltage by a power-on rest circuit.
The output circuitry contains short
circuit protection. The voltage regulator
contains reverse connection protection.
The slicing level is derived from the
stored peak and valley values. A start-up
algorithm holds the output state until
the slicing level has reached a stable
position. The VG481V1 is zero speed
capable after initial startup as long as
power is applied. The VG481V1 IC is
offered in flat TO-92-style package with
straight leads in bulk packaging which
allows for a compact PC board layout.
VALUE TO CUSTOMERS
• Uses a dual peak detecting circuit
derived from the stored peak and
valley values. This provides zero speed
capability and more accurately tracks
targets that exhibit run-out and other
variations.
• AEC-Q100 qualified and often suitable
for automotive applications.
• Provides higher accuracy.
POTENTIAL APPLICATIONS
• Transportation: Transmission speed
sensing
• General speed sensing
DIFFERENTIATION
Provides lesser operate point variation.
FEATURES
• Back-biased speed sensor IC
• Zero-speed capable
• Low cost and easy to use
• 4 V to 24 V supply voltage range
• -40°C to 150°C operating temperature
range
• Open collector output rated for 20 mA
• Output short circuit protection
• Reverse voltage protected
• Qualified to AEC-Q100 (Grade 0)
PORTFOLIO
The Honeywell VG481V1
Speed Sensor IC joins the following
related products: VM721V1, VM721D1,
VF401, VF526DT. To view the entire
product portfolio, click here.



Honeywell VG481V1
BACK-BIASED HALL-EFFECT SPEED SENSOR INTEGRATED CIRCUIT ICS
VG481V1
TABLE 1. ELECTRICAL SPECIFICATIONS (AT 4.0 V ≤ VS ≤ 24 V, -40°C ≤ TA ≤ 150°C, UNLESS OTHERWISE SPECIFIED)
CHARACTERISTIC
CONDITION
MIN.
TYP.
MAX.
UNIT
Supply voltage
Pin 2 referenced to Pin 1
4 14 24 V
Reverse supply voltage
current < 10 mA
— — -26 V
Supply current
Startup time
Output short circuit
Vsupply = 24 V, with “ON” state
Vsupply = 4 V
short load
— — 10 mA
— — 10 ms
— 10 — µs
Output leakage current
Output current (sinking)
Vsupply = 24 V, with “OFF” state
continuous operation (recommended)
— 10 µA
— 5 mA
Output saturation voltage sinking 20 mA
— — 360
Switching frequency:
rise time
fall time
VCC = 12 V, RL=2 kOhm; CL = 20 pF
VCC = 12 V, RL=2 kOhm; CL = 20 pF
— — 10
—— 1
Power up ramp time1
0 V to 4 V, power up in high state
1
1If the power up ramp time from 0 V to 4 V is greater than 1 ms, proper IC functionality cannot be guaranteed.
mV
µs
µs
ms
TABLE 2. MAGNETIC SPECIFICATIONS
CHARACTERISTIC
CONDITION
Back bias range
South pole facing back of package
Peak magnetic field
for linear operation
Switching differential
25°C
Minimum signal lockout
peak to valley difference
Magnetic signal
continuous operation (recommended)
Output signal frequency
MIN.
500
75
0
TYP.
5
38.5
27.5
MAX.
4000
4500
10000
UNIT
Gauss
Gauss
Gauss
Gauss
Gauss
Hz
Die placement tolerance
X and Y
-0.07
0.07
mm
TABLE 3. ENVIRONMENTAL SPECIFICATIONS
CHARACTERISTIC
CONDITION
ESD (HBM)
JEDEC JS-001
MIN.
8
TYP.
MAX.
UNIT
kV
TABLE 4. ABSOLUTE MAXIMUM RATINGS
CHARACTERISTIC
CONDITION
Operating temperature
ambient
Storage temperature
ambient, unbiased
Soldering temperature
applied for <10 s
Output current (sinking)
open collector
Forward supply voltage
dc voltage for 1 hour
Reverse supply voltage
dc voltage for 1 hour
MIN.
-40
-55
-26
TYP.
NOTICE
Absolute maximum ratings are the extreme limits the device will momentarily withstand
without damage to the device. Electrical and mechanical characteristics are not guaranteed
if the rated voltage and/or currents are exceeded, nor will the device necessarily operate at
absolute maximum ratings.
2 Sensing and Internet of Things
MAX.
150
150
265
20
26
UNIT
°C
°C
°C
mA
V
V
CAUTION
ELECTROSTATIC
SENSITIVE
DEVICES
DO NOT OPEN OR HANDLE
EXCEPT AT A
STATIC FREE WORKSTATION
ESD SENSITIVITY:
CLASS 3



Honeywell VG481V1
BACK-BIASED HALL-EFFECT SPEED SENSOR INTEGRATED CIRCUIT ICS
VG481V1
TYPICAL OPERATION
Figure 1 shows the circuit’s high
level block diagram. During normal
operation, peak maximum and valley
minimum values, proportional to the
magnetic signal, are tracked and held.
The average of these two values is
used to produce a slicing level that
is compared to the input signal to
produce the output transitions.
Upon transition from output low to
high state, the valley minimum value
is preloaded in the positive direction,
an amount equal to the difference of
the previous peak and valley divided
by four. Likewise, upon transition from
output high to low state, the peak
maximum is preloaded in the negative
direction in an amount equal to the
difference of the previous peak and
valley divided by four (see Figure 2).
FIGURE 1. HIGH LEVEL CIRCUIT BLOCK DIAGRAM
The preload values are calculated from
the peak and valley counter register
values. This preload function allows the
sensor to track targets with run-out and
other variations.
Voltage
regulator
Clock
Control logic
Power on reset
Minimum signal lockout
peak/valley reset/preload
Dual
Hall-effect
elements
Amplifier
Internal
peak
track and
hold
Comparator
Output
control
Short
circuit
protected
output
FIGURE 2. HIGH LEVEL OPERATION
2800
2600
2400
2200
1.6
1.5
1.4
1.3
1
0.5
0
Internal
valley
track and
hold
Time
Time
Time
Magnetic signal
Amplifier output
Peak
Valley
Slice
Output
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