A1391, A1392, A1393, and A1395
Micro Power 3 V Linear Hall Effect Sensors
withTri-State Output and User-Selectable Sleep Mode
Features and Benefits Description
High-impedance output during sleep mode The A139x family of linear Hall effect sensor integrated circuits
Compatible with 2.5 to 3.5 V power supplies (ICs) provide a voltage output that is directly proportional to
10 mW power consumption in the active mode an applied magnetic field. Before amplification, the sensitivity
Miniature MLP/DFN package of typical Hall effect ICs (measured in mV/G) is directly
Ratiometric output scales with the ratiometric supply proportional to the current flowing through the Hall effect
reference voltage (VREF pin) transducer element inside the ICs. In many applications, it
Temperature-stable quiescent output voltage and is difficult to achieve sufficient sensitivity levels with a Hall
sensitivity effect sensor IC without consuming more than 3 mA of current.
Wide ambient temperature range: 20C to 85C The A139x minimize current consumption to less than 25 A
ESD protection greater than 3 kV through the addition of a user-selectable sleep mode. This makes
Solid-state reliability these devices perfect for battery-operated applications such as:
Preset sensitivity and offset at final test cellular phones, digital cameras, and portable tools. End users
can control the current consumption of the A139x by applying a
logic level signal to the S L E E P pin. The outputs of the devices
are not valid (high-impedance mode) during sleep mode. The
Package: 6 pin MLP/DFN (suffix EH)
high-impedance output feature allows the connection of multiple
A139x Hall effect devices to a single A-to-D converter input.
The quiescent output voltage of these devices is 50 % nominal of
the ratiometric supply reference voltage applied to the VREF pin
of the device. The output voltage of the device is not ratiometric
with respect to the SUPPLY pin.
Approximate scale Continued on the next page
Functional Block Diagram
VCC VREF
To all subcircuits
R / 2
Ratio
Hall Element
Regulator
R / 2
Ratio
OUT
Amp Out
Gain Offset
Programming Logic
SLEEP
Circuit Reference Current
GND
1391-DS, Rev. 3
Dynamic Offset
Cancellation
FilterMicro Power 3 V Linear Hall Effect Sensors with
A1391, A1392,
A1393, and A1395
Tri-State Output and User Selectable Sleep Mode
Description (continued)
Despite the low power consumption of the circuitry in the A139x, offset cancellation circuits. End of line, post-packaging, factory
programming allows precise control of device sensitivity and
the features required to produce a highly-accurate linear Hall effect
offset.
IC have not been compromised. Each BiCMOS monolithic circuit
integrates a Hall element, improved temperature-compensating
These devices are available in a small 2.0 3.0 mm, 0.75 mm nominal
circuitry to reduce the intrinsic sensitivity drift of the Hall element,
height microleaded package (MLP/DFN). It is Pb (lead) free, with
a small-signal high-gain amplifier, and proprietary dynamic 100% matte tin leadframe plating.
Selection Guide
Sensitivity
Part Number Packing
(mV / G, Typ.)
A1391SEHLT-T 7-in. reel, 3000 pieces/reel
1.25
A1392SEHLT-T 2.50 7-in. reel, 3000 pieces/reel
A1393SEHLT-T 5 7-in. reel, 3000 pieces/reel
A1395SEHLT-T 10 7-in. reel, 3000 pieces/reel
Absolute Maximum Ratings*
Supply Voltage V 8V
CC
Reverse-Supply Voltage V 0.1 V
RCC
Ratiometric Supply Reference Voltage V 7V
REF
Reverse-Ratiometric Supply Reference Voltage V 0.1 V
RREF
Logic Supply Voltage V (V > 2.5 V) 32 V
S L E E P CC
Reverse-Logic Supply Voltage V 0.1 V
RS L E E P
Output Voltage V V + 0.1 V
OUT CC
Reverse-Output Voltage V 0.1 V
ROUT
Operating Ambient Temperature T Range S 20 to 85 C
A
Junction Temperature T (MAX) 165 C
J
StorageTemperature T 65 to 170 C
stg
*All ratings with reference to ground
Terminal List Table
Pin-out Diagram
Pin Name Function
VCC 1 6 VREF
1 VCC Supply
OUT 2 5 SLEEP
GND34 GND
2 OUT Output
3 GND Ground
4 GND Ground
5 S L E E P Toggle sleep mode
6 VREF Supply for ratiometric reference
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com