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A1325 の電気的特性と機能

A1325のメーカーはAllegro MicroSystemsです、この部品の機能は「Linear Hall Effect Sensor ICs」です。


製品の詳細 ( Datasheet PDF )

部品番号 A1325
部品説明 Linear Hall Effect Sensor ICs
メーカ Allegro MicroSystems
ロゴ Allegro MicroSystems ロゴ 




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A1325 Datasheet, A1325 PDF,ピン配置, 機能
A1324, A1325, and A1326
Low Noise, Linear Hall Effect Sensor ICs with Analog Output
Features and Benefits
• Temperature-stable quiescent output voltage and sensitivity
• Output voltage proportional to magnetic flux density
• Low-noise output increases accuracy
• Precise recoverability after temperature cycling
• Ratiometric rail-to-rail output
• Wide ambient temperature range: –40°C to 150°C
• Immune to mechanical stress
• Solid-state reliability
• Enhanced EMC performance for stringent automotive
applications
Packages
3-pin ultramini SIP
1.5 mm × 4 mm × 3 mm
(suffix UA)
3-pin SOT23-W
2 mm × 3 mm × 1 mm
(suffix LH)
Approximate footprint
Description
New applications for linear output Hall-effect devices, such
as displacement, angular position, and current measurement,
require high accuracy in conjunction with small package size.
The AllegroA1324, A1325, and A1326 linear Hall-effect
sensor ICs are designed specifically to achieve both goals. This
temperature-stable device is available in a miniature surface
mount package (SOT23W) and an ultra-mini through-hole
single in-line package.
These ratiometric Hall effect sensor ICs provide a voltage
output that is proportional to the applied magnetic field. They
feature a quiescent voltage output of 50% of the supply voltage.
The A1324/25/26 feature factory programmed sensitivities of
5.0 mV/G, 3.125 mV/G, and 2.5 mV/G, respectively.
The features of these linear devices make them ideal for
use in automotive and industrial applications requiring high
accuracy, and operate through an extended temperature range,
–40°C to 150°C.
Each BiCMOS monolithic circuit integrates a Hall element,
temperature-compensating circuitry to reduce the intrinsic
sensitivity drift of the Hall element, a small-signal high-gain
amplifier, a clamped low-impedance output stage, and a
proprietary dynamic offset cancellation technique.
These devices are available in a 3-pin ultra-mini SIP package
(UA), and a 3-pin surface mount SOT-23 style package (LH). Both
are lead (Pb) free, with 100% matte tin leadframe plating.
V+
VCC
Functional Block Diagram
To All Subcircuits
GND
Sensitivity and
Sensitivity TC
Offset
Trim Control
VOUT
A1324-DS, Rev. 4

1 Page





A1325 pdf, ピン配列
A1324, A1325,
and A1326
Linear Hall Effect Sensor ICs with Analog Output
OPERATING CHARACTERISTICS Valid throughout TA range, CBYPASS = 0.1 µF, VCC = 5 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Electrical Characteristics
Supply Voltage
Supply Current
Power-On Time2
Supply Zener Clamp Voltage
Internal Bandwidth
Chopping Frequency3
Output Characteristics
VCC
ICC No load on VOUT
tPO TA = 25°C, CL (PROBE) = 10 pF
VZ TA = 25°C, ICC = 12 mA
BWi Small signal, –3 dB
fC TA = 25°C
4.5 5.0 5.5
– 6.9 9
– 32 –
6 8.3 –
– 17 –
– 400 –
Quiescent Voltage Output
Output Referred Noise
Input Referred RMS Noise Density
DC Output Resistance
Output Load Resistance
VOUT(Q)
VN
VNRMS
ROUT
RL
B = 0 G, TA = 25°C
A1324, TA = 25°C, CBYPASS = 0.1 µF
A1325, TA = 25°C, CBYPASS = 0.1 µF
A1326, TA = 25°C, CBYPASS = 0.1 µF
TA = 25°C, CBYPASS = open, no load on VOUT,
f << BWi
VOUT to VCC
VOUT to GND
2.425
4.7
4.7
2.500
7.0
4.4
3.5
1.3
<1
2.575
Output Load Capacitance
Output Saturation Voltage
Magnetic Characteristics
CL
VOUT(sat)HIGH
VOUT(sat)LOW
VOUT to GND
RPULLDOWN = 4.7 kΩ, VCC = 5 V
RPULLUP = 4.7 kΩ, VCC = 5 V
– – 10
4.7 –
– – 0.30
Sensitivity
Sensitivity Temperature Coefficient
Sens
TCSens
A1324, TA = 25°C
A1325, TA = 25°C
A1326, TA = 25°C
LH package; programmed at TA = 150°C,
calculated relative to Sens at 25°C
UA package; programmed at TA = 150°C,
calculated relative to Sens at 25°C
4.750
2.969
2.375
5.000
3.125
2.500
0
0.03
5.250
3.281
2.625
Error Components
Sensitivity Drift at Maximum Ambient
Operating Temperature
LH package; from hot to room temperature
∆Sens(TAmax) UA package; from hot to room temperature
–5 –
–2.5 –
5
7.5
Sensitivity Drift at Minimum Ambient
Operating Temperature
LH package; from cold to room temperature
∆Sens(TAmin) UA package; from cold to room temperature
–3.5 –
–6 –
8.5
4
Unit1
V
mA
µs
V
kHz
kHz
V
mV(p-p)
mV(p-p)
mV(p-p)
mG/√Hz
Ω
nF
V
V
mV/G
mV/G
mV/G
%/°C
%/°C
%
%
%
%
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
3


3Pages


A1325 電子部品, 半導体
A1324, A1325,
and A1326
Linear Hall Effect Sensor ICs with Analog Output
TA = 25°C, and Sens(25°C)1 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 132x is 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 sensitivity error is present when there
is a difference between the sensitivities measured at B1 and B2.
Linearity Sensitivity Error is calculated separately for the positive
(LINERR+) and negative (LINERR– ) applied magnetic fields. Lin-
earity Sensitivity Error (%) is measured and defined as:
LinERR+ = 1–
SensB(++)
SensB(+)

×
100%
LinERR– = 1–
SensB(– –)
SensB(–)

×
100%
(7)
and
where:
LinERR = max(| LinERR+| , |LinERR–| )
(8)
SensBx
=
|VOUT(Bx)BXVOUT(Q)|

(9)
and B(++), B(+), B(– –), and B(–) are positive and negative mag-
netic fields with respect to the quiescent voltage output such that
|B(++)| > |B(+)| and |B(– –)| > |B(– )| .
Symmetry Sensitivity Error The magnetic sensitivity of a
device is constant for any two applied magnetic fields of equal
magnitude and opposite polarities.
Symmetry Error (%), is measured and defined as:
SymERR
= 1–
SensB(+)
SensB(–)
 ×100%
(11)
where SensBx is defined as in equation 9, and B(+), B(–) are posi-
tive and negative magnetic fields such that |B(+)| = |B(–)|.
Ratiometry Error The A132x features a 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 percent-
age, each characteristic also increases or decreases by the same
percentage. Error is the difference between the measured change
in the supply voltage, relative to 5 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)5V
5V

×
100%
(12)
The ratiometric error in magnetic sensitivity, RatSENS (%), for a
given supply voltage, VCC, is defined as:
RatVOUT(Q) = 1–
SensVCC
VCC
Sens5V
5V

×
100%
(13)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6

6 Page



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