ALLEGRO A31010 Analog 1D Linear Demo User Guide

If an enable signal is required, short the EN and VCC pins together on JP1 (pins 2 and 3) or populate R1 with a 0 resistor.
To power the board, apply the appropriate signal to the EN pin.

Breakout Evaluation

Connect the Analog 1D Linear Demo pin header (JP1) to supply voltage, ground, enable, and output voltage signals for bench evaluation of the sensor.

Ensure no battery is in B1 when supplying voltage to the VCC pin.

Analog 1D Linear Demo Configurations
Refer to Table 1 for different configurations available with corresponding Allegro sensor models.

DESCRIPTION

The Analog 1D Linear Demo is a multipurpose demonstration/evaluation board that can be used to evaluate Allegro’s analog output 1D linear sensors, including:

A1391, A1392, A1393, A1395

A31010SEHALT-4, A31010SEHALT-10

USING THE EVALUATION BOARD

The Analog 1D Linear Demo may be used as a battery-powered demonstration aid or as a breakout board for evaluating the I/O of the Allegro 1D linear magnetic sensor. Integrated red and blue LEDs (D1) are used to show when the output has moved away from the quiescent (zero-field) voltage, representing a magnetic field applied to the Allegro sensor. The sensitivity of the LEDs are tunable with the variable resistor (VR1).

Battery-Powered Demonstration

The Analog 1D Linear Demo can be powered from a 3V, CR1220 battery (not included), which can be installed on the back-side battery holder (B1, positive side away from the PCB).
Applying a magnetic field in the operational range of the Allegro sensor changes the output of the Allegro sensor (see product-specific datasheet for operational ranges). Moving the output voltage above the VREF+ threshold turns the red LED on, and moving the output voltage below the VREF– threshold turns the blue LED on. VREF+ and VREF– are adjustable using the variable resistor (VR1), useful if the LED sensitivity response is tuned too high or too low.

Note that out of the box, the enable signal is not connected to the supply voltage. If enable is needed for operational performance of the Allegro sensor, this can be supplied by shorting EN and VCC pins together, either on the JP1 pin header (pins 2 and 3) or by populating R1 with a 0 Ω resistor. Alternatively, enable can be controlled by applying the appropriate signal to the EN pin.

Breakout Evaluation

The Analog 1D Linear Demo pin header (JP1) provides access to the supply voltage, ground, enable, and output voltage signals from the sensor, useful for evaluating the Allegro sensor in a bench environment.

When supplying voltage to the VCC pin, ensure that no battery is populated in the battery holder (B1).

Analog 1D Linear Demo Configurations

Table 1: Analog 1D Linear Demo Configurations

Configuration Name	Allegro Sensor
ASEK-1391-KIT-T	A1391
ASEK-1392-KIT-T	A1392
ASEK-1393-KIT-T	A1393
ASEK-1395-KIT-T	A1395
ASEK-31010-4-KIT-T	A31010SEHALT-4
ASEK-31010-10-KIT-T	A31010SEHALT-10

SCHEMATIC

LAYOUT

PCB dimensions: 50.8 mm × 30.48 mm (2″ × 1.2″)

Mounting hole dimensions: 3 mm holes on a 20 mm grid

BILL OF MATERIALS

ELECTRICAL COMPONENTS
Designator	Quantity	Description	Manufacturer	Manufacturer Part Number	Comment
U1	1	Allegro sensor	Allegro MicroSystems	Variable	Variable (user selectable, see Table 1)
U2	1	Comparator, general purpose, open-drain, 8-SOIC	STMicroelectronics	TS332IDT
JP1	1	Connector header, through hole, 10 position, 0.100″ (2.54 mm)	TE Connectivity	9-146277-0-10
B1	1	Battery retainer, coin, 12 mm, 1 cell, PC pin	Keystone Electronics	3001
D1	1	LED, RGB, 6PLCC, SMD	Cree LED	CLY6D-FKC-CK1N1D1BB7D3D3
VR1	1	Thumbwheel potentiometer, 1 MΩ, 0.5 W, through hole	Bourns Inc.	3352T-1-105LF
R1	1	0 Ω, jumper, 0603, 100 mW, thick film	Yageo	RC0603FR-070RL	Not populated, can be added by user if tying EN to VCC is desired
R2, R3	2	100 Ω, ±1%, 0603, 100 mW, thick film	Yageo	RC0603FR-07100RL
R4, R5	2	32.4 kΩ, ±1%, 0603, 100 mW, thick film	Yageo	RC0603FR-0732K4L
C1, C2	2	10 nF, ±10%, 50 V, X7R, 0603, ceramic	Kyocera AVX	KGM15AR71H103KT
OTHER COMPONENTS
Designator	Quantity	Description	Manufacturer	Manufacturer Part Number	Comment
–	1	Battery, Lithium, 3 V, coin, 12.5 mm	FDK America, Inc.	CR1220	Not populated, can be added by the user if battery operation is desired

Allegro MicroSystems reserves the right to make, from time to time, such departures from the detailed specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current.
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of

Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems assumes no responsibility for its use, nor for any infringement of patents or other rights of third parties which may result from its use.

Copies of this document are considered uncontrolled documents.

ABOUT COMPANY

Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com

Frequently Asked Questions (FAQ)

How do I adjust the sensitivity of the LEDs on the Analog 1D Linear Demo?
The sensitivity of the LEDs can be tuned using the variable resistor (VR1) on the board.
Can I use a different battery type other than a 3V CR1220 in the Analog 1D Linear Demo?
It is recommended to use a 3V CR1220 battery as specified for optimal performance.

Documents / Resources

ALLEGRO A31010 Analog 1D Linear Demo [pdf] User Guide
A1391, A1392, A1393, A1395, A31010SEHALT-4, A31010SEHALT-10, A31010 Analog 1D Linear Demo, A31010, Analog 1D Linear Demo, Linear Demo

References

User Manual

ALLEGRO A31010 Analog 1D Linear Demo

Product Specifications

Product Usage Instructions