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PDF A1388 Data sheet ( Hoja de datos )
| Número de pieza | A1388 | |
| Descripción | Linear Hall-Effect Sensor IC | |
| Fabricantes | Allegro | |
| Logotipo |  |
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A1388 and A1389
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
Features and Benefits
• 5.0 V supply operation
• QVO temperature coefficient programmed at Allegro™ for
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 A1388 and A1389
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 A1388 and A1389 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 they 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
A13889-DS, Rev. 1
GND
1 page  
A1388 and
A1389
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
OPERATING CHARACTERISTICS (continued) Valid through TA , CBYPASS = 0.1 µF, VCC = 5 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit1
Error Components
Linearity Sensitivity Error
Symmetry Sensitivity Error
Ratiometry Quiescent Voltage
Output Error7
LinERR
SymERR
RatVOUT(Q)
Across supply voltage range (relative to VCC =
5 V)
– ±1.5 –
– ±1.5 –
– ±1.5 –
%
%
%
Ratiometry Sensitivity Error7
RatSens
Across supply voltage range (relative to VCC =
5 V)
– ±1.5 –
%
Ratiometry Clamp Error8
Drift Characteristics
RatVOUTCLP
TA = 25°C, across supply voltage range (relative
to VCC = 5 V)
–
±1.5
–
%
A1388LLHLX-2-T
–20 – 0 mV
Typical Quiescent Voltage Output Drift
Across Temperature Range
∆VOUT(Q)
A1388LUA-2-T
A1389LLHLX-9-T
A1389LUA-9-T
TA = 150°C
–10 0 10 mV
–30 – 0 mV
–20 0 10 mV
A1389LLHLX-RP9-T
–30 – 0 mV
A1388LLHLX-2-T
0.08 0.12 0.16
%
Sensitivity Drift Due to
Package Hysteresis9
∆SensPKG
A1388LUA-2-T
A1389LLHLX-9-T
A1389LUA-9-T
TA = 25°C, after
temperature cycling
0.08 0.12 0.16
0.08 0.12 0.16
0.08 0.12 0.16
%
%
%
A1389LLHLX-RP9-T
0.08 0.12 0.16
%
1 1 G (gauss) = 0.1 mT (millitesla),
2On power-up, the output of the device is held low until VCC exceeds VUVLOHI. After the device is powered, the output remains valid until VCC drops
below VUVLOLO , when the output is pulled low.
3Determined by design and characterization, not evaluated at final test.
4See the Characteristic Definitions section.
5fC varies as much as approximately ±20% across the full operating ambient temperature range and process.
6VCLPLOW and VCLPHIGH scale with VCC due to ratiometry.
7Percent change from actual value at VCC = 5 V, for a given temperature.
8Percent change from actual value at VCC = 5 V, TA = 25°C.
9Sensitivity drift through the life of the part, ΔSensLIFE , can have a typical error value ±3% in addition to package hysteresis effects.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
A1388 and
A1389
Linear Hall-Effect Sensor ICs with Analog Output
Available in a Miniature, Low Profile Surface Mount Package
Package UA, 3-Pin SIP
4.09
+0.08
–0.05
45°
B
3.02
+0.08
–0.05
E 2.04
1.44
E
1.02
MAX
12 3
10°
E
Branded
Face
0.79 REF
A
14.99 ±0.25
0.43
+0.05
–0.07
1.27 NOM
C
1.52 ±0.05
Mold Ejector
Pin Indent
45°
NNN
1
D Standard Branding Reference View
= Supplier emblem
N = Last three digits of device part number
0.41
+0.03
–0.06
For Reference Only; not for tooling use (reference DWG-9065)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Dambar removal protrusion (6X)
B Gate and tie bar burr area
C Active Area Depth, 0.50 mm REF
D Branding scale and appearance at supplier discretion
E Hall element (not to scale)
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 12 Páginas | |
| PDF Descargar | [ Datasheet A1388.PDF ] | |
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