Allegro CT100LW-HS6 EVB102 SOT23-6 Evaluation Board User Guide

Brand: Allegro MicroSystems

Model: CT100LW-HS6

Description

The CT100 is a 1D linear sensor utilizing Allegro's patented XtremeSense™ TMR technology, configured in a full-bridge setup. It is designed to measure magnetic fields within a total range of –50 mT to 50 mT, offering exceptional temperature stability across the entire operating temperature range. The device supports a wide input voltage range from 1.0 V to 5.5 V. The EVB102 SOT23-6 evaluation board is suitable for applications involving linear measurements, proximity sensing, and current sensing. This guide provides instructions on connecting and using the EVB102 SOT23-6 evaluation board.

Features

Operating magnetic field range: ±50 mT
Stable magnetic performance over temperature
Differential outputs
Supply Voltage: 1.0 V to 5.5 V
Operating temperature: -40°C to 150°C

Evaluation Board Overview

The EVB102 SOT23-6 evaluation board facilitates the use of the CT100 sensor. The board features connections for power input (VDD and GND) and sensor outputs (OUT1 and OUT2).

Figure 1: EVB102 SOT23-6 Evaluation Board

Configuration Options

Table 1: EVB102 SOT23-6 Evaluation Board Configurations

Configuration Name	Part Number	Output Voltage Range (mV)	Output Current Range (mV)
EVB102 SOT23-6	CT100LW-HS6	±1430	0-200

General Specifications

Table 2: General Specifications

Specification	Min.	Typ.	Max	Units
Input Operating Voltage	2.7	-	5.0	V
Input Operating Temperature	-5.0	-	5.0	A
Cutoff Frequency (3 dB)	-	10	-	kHz

Using the Evaluation Board

To use the evaluation board, connect the power supply to VDD and GND. The maximum allowable voltage is 5.5 VDC. For general use, apply 3.3 VDC to VDD and GND. Connect a multimeter to OUT1 and OUT2 to measure the output. Pass a magnet steadily over the IC to obtain a reading, which should be between 0 mV and 200 mV. As the magnet moves from VDD towards GND, the current output will initially increase and then decrease as it reaches GND. It is recommended to use short cables, at least 18 AWG, for connections.

Schematic

Figure 3 illustrates the schematic diagram for the EVB102 SOT23-6 evaluation board.

Figure 3: EVB102 SOT23-6 evaluation board schematic

Layout

Figures 4 and 5 display the top and bottom layers of the EVB102 SOT23-6 evaluation board's printed circuit board (PCB).

Figure 4: EVB102 SOT23-6 evaluation board top layer

Figure 5: EVB102 SOT23-6 evaluation board bottom layer

Bill of Materials

Table 3: CT100LW-HS6 Evaluation Board Bill of Materials

Designator	Quantity	Description	Manufacturer	Manufacturer Part Number
PCB	1	EVB102 SOT23-6 EVAL PCB	Allegro MicroSystems	-
U$6	1	CT100 Sensor	Allegro MicroSystems	-
J1, J2, J3, J4	4	Header, vertical, through-hole	TE	9-146285-0-01

Revision History

Number	Date	Description
-	September 27, 2024	Initial release

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