A17201LUAA-I1 查看數據表（PDF） - Allegro MicroSystems

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A17201LUAA-I1

Two-Wire AC-Coupled Differential Sensor IC with Integrated Filter Capacitor

Allegro MicroSystems 

A17201

Two-Wire AC-Coupled Differential Sensor IC

with Integrated Filter Capacitor

AC-Coupled Operation

Steady-state magnet and system offsets are eliminated using an

on-chip differential bandpass filter. The upper and lower cutoff

frequencies of this patented filter are set using an internal inte-

grated capacitor. The differential structure of this filter improves

the ability of the IC to reject single-ended noise on the GND

or VCC lines and, as a result, makes the device more resistant

to EMI (electromagnetic interference) typically seen in hostile

remote-sensing environments.

Power Supply Protection

The device contains an on-chip voltage regulator and can operate

over a wide supply voltage range. In applications that operate

the device from an unregulated power supply, transient protec-

tion must be added externally. For applications using a regulated

line, EMI/RFI protection may still be required. The circuit shown

in Figure 3 is the most basic configuration required for proper

device operation.

Typical Circuit

A resistor sense, RL, to exhibit two wire output between GND

and Pin 2, is shown in Figure 3.

VCC

VCC

1

VCC

1

VCC

A17201UA

GND

2/3

2.2 nF

CBYPASS

A17201UB

GND

2

RL

CL

100 Ω

RL

CL

100 Ω

Figure 3: Typical Application Circuits

8

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

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