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A1324LLHLT-T

P1-P3P4-P6P7-P9P10-P12
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 Allegro
™
A1324, 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.
A1324-DS, Rev. 4
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
Low Noise, Linear Hall Effect Sensor ICs with Analog Output
Functional Block Diagram
A1324, A1325, and A1326
Packages
Approximate footprint
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)
Trim Control
Sensitivity and
Sensitivity TC
Offset
Tuned Filter
GND
VC
V+
C
VOUT
Dynamic Offset
Cancellation
To All Subcircuits
Linear Hall Effect Sensor ICs with Analog Output
A1324, A1325,
and A1326
2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Absolute Maximum Ratings
Characteristic Symbol Notes Rating Unit
Forward Supply Voltage V
CC
8 V
Reverse Supply Voltage V
RCC
–0.1 V
Forward Output Voltage V
OUT
15 V
Reverse Output Voltage V
ROUT
–0.1 V
Output Source Current I
OUT(SOURCE)
VOUT to GND 2 mA
Output Sink Current I
OUT(SINK)
VCC to VOUT 10 mA
Operating Ambient Temperature T
A
L temperature range –40 to 150 ºC
Maximum Junction Temperature T
J
(max) 165 ºC
Storage Temperature T
stg
–65 to 170 ºC
Terminal List Table
Name
Number
Function
LH UA
VCC 1 1
Input power supply; tie to GND with
bypass capacitor
VOUT 2 3
Output signal; also used for
programming
GND 3 2 Ground
Selection Guide
Part Number Packing
1
Package
Sensitivity (Typ.)
(mV/G)
A1324LLHLT-T 3 000 pieces per reel 3-pin SOT-23W surface mount
5.000A1324LLHLX-T 10 000 pieces per reel 3-pin SOT-23W surface mount
A1324LUA-T
2
500 pieces per bag 3-pin ultramini SIP through hole mount
A1325LLHLT-T 3 000 pieces per reel 3-pin SOT-23W surface mount
3.125A1325LLHLX-T 10 000 pieces per reel 3-pin SOT-23W surface mount
A1325LUA-T
2
500 pieces per bag 3-pin ultramini SIP through hole mount
A1326LLHLT-T 3 000 pieces per reel 3-pin SOT-23W surface mount
2.500A1326LLHLX-T 10 000 pieces per reel 3-pin SOT-23W surface mount
A1326LUA-T
2
500 pieces per bag 3-pin ultramini SIP through hole mount
1
Contact Allegro
™
for additional packing options.
2
Contact factory for availability.
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic Symbol Test Conditions* Value Unit
Package Thermal Resistance
R
θJA
Package LH, on 4-layer PCB with copper limited to solder pads 228 ºC/W
Package LH, on 2-layer PCB with 0.463 in.
2
of copper area each
side, connected by thermal vias
110 ºC/W
Package UA, on 1-layer PCB with copper limited to solder pads 165 ºC/W
*Additional thermal information available on the Allegro website
Description (continued)
2 31
21
3
Pin-out Diagrams
LH Package UA Package
Linear Hall Effect Sensor ICs with Analog Output
A1324, A1325,
and A1326
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
OPERATING CHARACTERISTICS Valid throughout T
A
range, C
BYPASS
= 0.1 µF, V
CC
= 5 V; unless otherwise noted
Characteristics Symbol Test Conditions Min. Typ. Max. Unit
1
Electrical Characteristics
Supply Voltage V
CC
4.5 5.0 5.5 V
Supply Current I
CC
No load on VOUT – 6.9 9 mA
Power-On Time
2
t
PO
T
A
= 25°C, C
L
(PROBE) = 10 pF – 32 – µs
Supply Zener Clamp Voltage V
Z
T
A
= 25°C, I
CC
= 12 mA 6 8.3 – V
Internal Bandwidth BW
i
Small signal, –3 dB – 17 – kHz
Chopping Frequency
3
f
C
T
A
= 25°C – 400 – kHz
Output Characteristics
Quiescent Voltage Output V
OUT(Q)
B = 0 G, T
A
= 25°C 2.425 2.500 2.575 V
Output Referred Noise V
N
A1324, T
A
= 25°C, C
BYPASS
= 0.1 µF – 7.0 – mV
(p-p)
A1325, T
A
= 25°C, C
BYPASS
= 0.1 µF – 4.4 – mV
(p-p)
A1326, T
A
= 25°C, C
BYPASS
= 0.1 µF – 3.5 – mV
(p-p)
Input Referred RMS Noise Density V
NRMS
T
A
= 25°C, C
BYPASS
= open, no load on VOUT,
f << BW
i
– 1.3 – mG/√Hz
DC Output Resistance R
OUT
– < 1 – Ω
Output Load Resistance R
L
VOUT to VCC 4.7 – – kΩ
VOUT to GND 4.7 – – kΩ
Output Load Capacitance C
L
VOUT to GND – – 10 nF
Output Saturation Voltage
V
OUT(sat)HIGH
R
PULLDOWN
= 4.7 kΩ, V
CC
= 5 V 4.7 – – V
V
OUT(sat)LOW
R
PULLUP
= 4.7 kΩ, V
CC
= 5 V – – 0.30 V
Magnetic Characteristics
Sensitivity Sens
A1324, T
A
= 25°C 4.750 5.000 5.250 mV/G
A1325, T
A
= 25°C 2.969 3.125 3.281 mV/G
A1326, T
A
= 25°C 2.375 2.500 2.625 mV/G
Sensitivity Temperature Coefficient TC
Sens
LH package; programmed at T
A
= 150°C,
calculated relative to Sens at 25°C
– 0 – %/°C
UA package; programmed at T
A
= 150°C,
calculated relative to Sens at 25°C
– 0.03 – %/°C
Error Components
Sensitivity Drift at Maximum Ambient
Operating Temperature
∆Sens
(TAmax)
LH package; from hot to room temperature –5 – 5 %
UA package; from hot to room temperature –2.5 – 7.5 %
Sensitivity Drift at Minimum Ambient
Operating Temperature
∆Sens
(TAmin)
LH package; from cold to room temperature –3.5 – 8.5 %
UA package; from cold to room temperature –6 – 4 %
Continued on the next page…
P1-P3P4-P6P7-P9P10-P12

A1324LLHLT-T

Mfr. #:
Buy A1324LLHLT-T
Manufacturer:
Description:
SENSOR HALL EFFECT ANALOG SOT23W
Lifecycle:
New from this manufacturer.
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