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부품번호 A1318 기능
기능 Linear Hall-Effect Sensor ICs
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A1318 데이터시트, 핀배열, 회로
A1318 and A1319
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
Features and Benefits
• 3.3 V supply operation
• QVO temperature coefficient programmed at Allegrofor
improved accuracy
• Miniature package options
• High bandwidth, low noise analog output
• High speed chopping scheme minimizes QVO drift across
operating temperature range
• Temperature-stable quiescent voltage output and sensitivity
• Precise recoverability after temperature cycling
• Output voltage clamps provide short circuit diagnostic
capabilities
• Undervoltage lockout (UVLO)
• Wide ambient temperature range: –40°C to 150°C
• Immune to mechanical stress
• Enhanced EMC performance for stringent automotive
applications
Packages
3-pin SOT23-W
2 mm × 3 mm × 1 mm
(suffix LH)
3-pin ultramini SIP
1.5 mm × 4 mm × 3 mm
(suffix UA)
Description
New applications for linear output Hall-effect sensors, such
as displacement and angular position, require higher accuracy
and smaller package sizes. The Allegro A1318 and A1319
linear Hall-effect sensor ICs have been designed specifically to
meet both requirements. These temperature-stable devices are
available in both surface-mount and through hole packages.
The accuracy of each device is enhanced via end-of-line
optimization. Each device features non-volatile memory to
optimize device sensitivity and the quiescent voltage output
(QVO: output in the absence of a magnetic field) for a given
application or circuit. This A1318 and A1319 optimized
performance is sustained across the full operating temperature
range by programming the temperature coefficient for both
sensitivity and QVO at Allegro end-of-line test.
These ratiometric Hall-effect sensor ICs provide a voltage
output that is proportional to the applied magnetic field. The
quiescent voltage output is adjusted around 50% of the supply
voltage.
The features of these linear devices make them ideal for
use in automotive and industrial applications requiring high
accuracy, and operate across an extended temperature range,
–40°C to 150°C.
Each BiCMOS monolithic circuit integrates a Hall element,
temperature-compensating circuitry to reduce the intrinsic
Approximate footprint
Continued on the next page…
V+
VCC
Functional Block Diagram
VOUT
CBYPASS
Sensitivity and
Sensitivity TC
Offset and
Offset TC
A1318-DS, Rev. 1.
GND




A1318 pdf, 반도체, 판매, 대치품
A1318 and
A1319
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
OPERATING CHARACTERISTICS Valid over TA , CBYPASS = 0.1 µF, VCC = 3.3 V; unless otherwise noted
Characteristic
Symbol
Test Conditions
Min.
Typ.
Electrical Characteristics
Supply Voltage
Undervoltage Threshold2
VCC
VUVLOHI
VUVLOLO
Tested at TA = 25°C and TA = 150°C (device
powers on)
Tested at TA = 25°C and TA = 150°C (device
powers off)
3 3.3
––
2.5 –
Supply Current
Power On Time3,4
VCC Ramp Time3,4
VCC Off Level3,4
Delay to Clamp3,4
Supply Zener Clamp Voltage
Internal Bandwidth4
Chopping Frequency5
Output Characteristics
ICC
tPO
tVCC
VCCOFF
tCLP
VZ
BWi
fC
No load on VOUT
TA = 25°C, CL(PROBE) = 10 pF
TA = 25°C
TA = 25°C
TA = 25°C, CL = 10 nF
TA = 25°C, ICC = 13 mA
Small signal –3 dB
TA = 25°C
0.005
0
6
7.7
50
30
7.3
20
400
Output Referred Noise4
VN
VCC = 3.3 V, TA = 25°C, CBYPASS = open,
Sens = 5 mV/G, no load on VOUT
– 13
Input Referred RMS Noise Density4
DC Output Resistance4
Output Load Resistance4
Output Load Capacitance4
Output Voltage Clamp6
VNRMS
ROUT
RL
CL
VCLPHIGH
VCLPLOW
VCC = 3.3 V, TA = 25°C, CBYPASS = open,
Sens = 5 mV/G, no load on VOUT,
fmeasured << BWi
VOUT to GND
VOUT to GND
TA = 25°C, B = +400 G, RL = 10 kΩ (VOUT to GND)
TA = 25°C, B = –400 G, RL = 10 kΩ (VOUT to VCC)
A1318LLHLX-1-T
4.7
2.842
0.264
1.289
2.3
<1
2.97
0.33
1.35
A1318LLHLX-2-T
2.388
2.5
Sensitivity7
Sens
A1318LUA-2-T
A1319LLHLX-5-T
TA = 25°C
2.388
4.85
2.5
5
A1319LUA-5-T
4.85 5
A1318LLHLX-1-T
1.638
1.65
A1318LLHLX-2-T
1.638
1.65
Quiescent Voltage Output (QVO)
VOUT(Q)
A1318LUA-2-T
A1319LLHLX-5-T
TA = 25°C
1.638
1.635
1.65
1.65
A1319LUA-5-T
1.635
1.65
Max.
3.63
3
10
100
0.33
Unit1
V
V
V
mA
µs
ms
V
µs
V
kHz
kHz
– mV(p-p)
mG/√Hz
10
3.069
0.462
1.411
2.613
2.613
5.15
5.15
1.662
1.662
1.662
1.665
1.665
Ω
nF
V
V
mV/G
mV/G
mV/G
mV/G
mV/G
V
V
V
V
V
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
4

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A1318 전자부품, 판매, 대치품
A1318 and
A1319
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
the Sensitivity Drift Across Temperature Range, ∆SensTC, is
defined as:
SensTC =
SensTA – SensIDEAL(TA)
SensIDEAL(TA)
×100
(%) (5)
Sensitivity Drift Due to Package Hysteresis Package
stress and relaxation can cause the device sensitivity at TA = 25°C
to change during and after temperature cycling. This change in
sensitivity follows a hysteresis curve. For purposes of specifica-
tion, the Sensitivity Drift Due to Package Hysteresis, ∆SensPKG,
is defined as:
SensPKG =
Sens(25°C)(2) – Sens(25°C)(1)
Sens(25°C)(1)
×100
(%) (6)
where Sens(25°C)(1) is the programmed value of sensitivity
at T= 25°C, and Sens(25°C)(2) is the value of sensitivity at
TA = 25°C after temperature cycling TA up to 150°C, down to
–40°C, and back to up 25°C.
Linearity Sensitivity Error The A1318 and A1319 are
designed to provide linear output in response to a ramping
applied magnetic field. Consider two magnetic fields, B1 and B2.
Ideally, the sensitivity of a device is the same for both fields, for
a given supply voltage and temperature. Linearity error is present
when there is a difference between the sensitivities measured at
B1 and B2.
Linearity Sensitivity Error, LINERR , is calculated separately for
positive (LinERR+) and negative (LinERR– ) applied magnetic
fields. LINERR (%) is measured and defined as:
LinERR+
=
1–
Sens(B+)(2)
Sens(B+)(1)

×100
(%)
(7)
where:
LinERR
= 1–
SSeennss((BB–))((12)) ×100
(%)
SensBx
=
|VOUT(Bx)
Bx
VOUT(Q)|
(8)
and Bx are positive and negative magnetic fields, with respect to
the quiescent voltage output, such that
|B(+)(2)| > |B(+)(1)| and |B(–)(2)| > |B(–)(1)|
The effective linearity error is:
LinERR = max(|LinERR+| , |LinERR– |)
(9)
The output voltage clamps, VCLPHIGH and VCLPLOW , limit the
operating magnetic range of the applied field in which the device
provides a linear output. The maximum positive and negative
applied magnetic fields in the operating range can be calculated:
BMAX(+)
=
VCLPHIGH VOUT(Q)
Sens
(10)
BMAX(–) =
VOUT(Q) VCLPLOW
Sens
Symmetry Sensitivity Error The magnetic sensitivity of the
device is constant for any two applied magnetic fields of equal
magnitude and opposite polarities. Symmetry error, SymERR (%),
is measured and defined as:
SymERR
= 1–
Sens(B+)
Sens(B–)

×100
(%)
(11)
where SensBx is as defined in equation 10, and B+ and B– are
positive and negative magnetic fields such that |B+| = |B–|.
Ratiometry Error The A1318 and A1319 provide ratiometric
output. This means that the Quiescent Voltage Output, VOUT(Q) ,
magnetic sensitivity, Sens, and clamp voltages, VCLPHIGH and
VCLPLOW , are proportional to the supply voltage, VCC. In other
words, when the supply voltage increases or decreases by a
certain percentage, each characteristic also increases or decreases
by the same percentage. Error is the difference between the
measured change in the supply voltage relative to 3.3 V, and the
measured change in each characteristic.
The ratiometric error in quiescent voltage output, RatVOUT(Q) (%),
for a given supply voltage, VCC, is defined as:
RatVOUT(Q)
=
1–
VOUT(Q)(VCC)
VCC /
/ VOUT(Q)(3.3V)
3.3 (V)

×100
(%)
(12)
The ratiometric error in magnetic sensitivity, RatSens (%), for a
given supply voltage, VCC, is defined as:
RatSens
= 1–
SenVsC(VCC/C3) ./3S(eVn)s(3.3V)
×100
(%)
(13)
The ratiometric error in the clamp voltages, RatVOUTCLP (%), for
a given supply voltage, VCC, is defined as:
RatVOUTCLP
= 1–
VCLVPC(VCC/C3) ./3V(CVL)P(3.3V)
×100
where VCLP is either VCLPHIGH or VCLPLOW .
(%)
(14)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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