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PDF A1367 Data sheet ( Hoja de datos )
| Número de pieza | A1367 | |
| Descripción | Programmable Linear Hall-Effect Sensor IC | |
| Fabricantes | Allegro | |
| Logotipo |  |
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A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
FEATURES AND BENEFITS
• 240 kHz nominal bandwidth achieved via proprietary
packaging and chopper stabilization techniques
• On-board supply regulator with reverse-battery protection
• Proprietary segmented linear temperature compensation
(TC) technology provides a typical accuracy of 1% over
the full operating temperature range
• Customer-programmable, high-resolution offset and
sensitivity trim
• Factory-programmed sensitivity and quiescent
output voltage TC with extremely stable temperature
performance
• High-sensitivity Hall element for maximum accuracy
• Extremely low noise and high resolution achieved via
proprietary Hall element and low-noise amplifier circuits
Continued on the next page…
PACKAGE:
4-Pin SIP (suffix KT)
DESCRIPTION
The Allegro™ A1367 programmable linear Hall-effect
current sensor IC has been designed to achieve high accuracy
and resolution without compromising bandwidth. This goal
is achieved through new proprietary linearly interpolated
temperature compensation technology that is programmed
at the Allegro factory and provides sensitivity and offset that
are virtually flat across the full operating temperature range.
Temperature compensation is performed in the digital domain
with integrated EEPROM technology while maintaining a
240 kHz bandwidth analog signal path, making this device
ideal for HEVinverter, DC-to-DC converter, and electric power
steering (EPS) applications.
This ratiometric Hall-effect sensor IC provides a voltage output
that is proportional to the applied magnetic field. The customer
can configure the sensitivity and quiescent (zero field) output
voltage through programming on the VCC and output pins,
to optimize performance in the end application. The quiescent
output voltage is user-adjustable, around 50% (bidirectional
configuration) or 10% (unidirectional configuration) of the
supply voltage, VCC, and the output sensitivity is adjustable
within the range of 0.6 to 6.4 mV/G.
Continued on the next page…
Not to scale
VCC
(Programming)
CBYPASS
A1367-DS, Rev. 1
Regulator
Programming
Control
To all
subcircuits
Temperature
Sensor
Sensitivity Control
Charge Pump
Pulse Generator
Undervoltage
Detection
Broken
Ground
Detection
EEPROM and
Control Logic
Active Temp.
Compensation
Offset Control
Output
Clamps
Signal Recovery
Push/Pull
Output Driver
GND
Functional Block Diagram
VOUT
(Programming)
CL
1 page  
A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
OPERATING CHARACTERISTICS: Valid through the full operating temperature range, TA, CBYPASS = 0.1 µF, VCC = 5 V, un-
less otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit1
ELECTRICAL CHARACTERISTICS
Supply Voltage
Supply Current
Power-On Time2
VCC
ICC No load on VOUT
TA = 25°C, CBYPASS = open, CL = 1 nF,
tPO Sens = 2 mV/G, constant magnetic field
of 400 G
4.5 5 5.5 V
–
11
16.25
mA
– 80 – µs
Temperature Compensation
Power-On Time2
TA = 150°C, CBYPASS = open, CL = 1 nF,
tTC Sens = 2 mV/G, constant magnetic field
of 400 G
– 146 – µs
Power-On Reset Voltage2
Power-On Reset Hysteresis
Power-On Reset Release Time2
Power-On Reset Analog Delay
Supply Zener Clamp Voltage
Internal Bandwidth
Chopping Frequency3
OUTPUT CHARACTERISTICS
VPORH
VPORL
VPORHYS
tPORR
tPORA
Vz
BWi
fC
TA = 25°C, VCC rising
TA = 25°C, VCC falling
TA = 25°C
TA = 25°C, VCC rising
TA = 25°C, VCC rising
TA = 25°C, ICC = 30 mA
Small signal –3 dB, CL = 1 nF, TA = 25°C
TA = 25°C
3.75 4
– 3.5
– 500
– 32
– 46
6.5 7.5
– 240
–1
4.2 V
–V
– mV
– µs
– µs
–V
– kHz
– MHz
Propagation Delay Time2
Rise Time2
Response Time2
tpd
TA = 25°C, magnetic field step of 400 G,
CL = 1 nF, Sens = 2 mV/G
– 1.1 – µs
tr
TA = 25°C, magnetic field step of 400 G,
CL = 1 nF, Sens = 2 mV/G
– 2.4 – µs
TA = 25°C, magnetic field step of 400 G,
CL = 1 nF, Sens = 2 mV/G, measurement of
–
1.8
–
µs
80% input to 80% output
tRESPONSE TA = 25°C, magnetic field step of 400 G,
CL = 1 nF, Sens = 2 mV/G, measurement of
–
2.2
–
µs
90% input to 90% output
Delay to Clamp2
Output Voltage Clamp4
Output Saturation Voltage2
Broken Wire Voltage2
Noise5
tCLP
VCLP(HIGH)
VCLP(LOW)
VSAT(HIGH)
VSAT(LOW)
VBRK(HIGH)
VBRK(LOW)
VN
TA = 25°C, magnetic field step from 800 to
1200 G, CL = 1 nF, Sens = 2 mV/G
TA = 25°C, RL(PULLDWN) = 10 kΩ to GND
TA = 25°C, RL(PULLUP) = 10 kΩ to VCC
TA = 25°C, RL(PULLDWN) = 10 kΩ to GND
TA = 25°C, RL(PULLDWN) = 10 kΩ to VCC
TA = 25°C, RL(PULLUP) = 10 kΩ to VCC
TA = 25°C, RL(PULLDWN) = 10 kΩ to GND
TA = 25°C, CL = 1 nF, BWf = BWi
TA = 25°C, CL = 1 nF, Sens = 2 mV/G,
BWf = BWi
TA = 25°C, CL = 1 nF, Sens = 2 mV/G,
BWf = BWi
–
4.55
0.15
4.7
–
–
–
–
–
–
10
–
–
–
–
VCC
100
1.4
12.6
2.1
–
4.85
0.45
–
400
–
–
–
–
–
µs
V
V
V
mV
V
mV
mG/√(Hz)
mVp-p
mVRMS
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
CHARACTERISTIC DEFINITIONS
Power-On Time (tPO)
When the supply is ramped to its operating voltage, the device
requires a finite time to power its internal components before
responding to an input magnetic field.
Power-On Time (tPO ) is defined as: the time it takes for the out-
put voltage to settle within ±10% of its steady-state value under
an applied magnetic field, after the power supply has reached
its minimum specified operating voltage (VCC(min)) as shown in
Figure 1.
Temperature Compensation Power-On Time
(tTC )
After Power-On Time (tPO ) elapses, tTC is also required before a
valid temperature compensated output.
Propagation Delay (tpd)
The time interval between a) when the applied magnetic field
reaches 20% of its final value, and b) when the output reaches
20% of its final value (see Figure 2).
Rise Time (tr)
The time interval between a) when the sensor IC reaches 10% of
its final value, and b) when it reaches 90% of its final value (see
Figure 2).
Response Time (tRESPONSE)
The time interval between a) when the applied magnetic field
reaches 80% of its final value, and b) when the sensor reaches
80% of its output corresponding to the applied magnetic field
(see Figure 3). The 90%-90% is also shown in the Electrical
Characteristics table.
V
VCC(typ)
90% VOUT
VCC
VOUT
VCC(min)
tPO
t1 t2
t1=
time at which power supply reaches
minimum specified operating voltage
t2=
time at which output voltage settles
within ±10% of its steady-state value
under an applied magnetic field
0 +t
Figure 1: Power-On Time Definition
(%) Applied Magnetic Field
90
Transducer Output
Rise Time, tr
20
10
0
Propagation Delay, tpd
t
Figure 2: Propagation Delay and Rise Time Definitions
Continued on the next page…
(%) Applied Magnetic Field
80 Transducer Output
Response Time, tRESPONSE
0
Figure 3: Response Time Definition
t
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet A1367.PDF ] | |
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