IXYS

MX8682

1

03/03/08

Drawing No. 0868209

www.claremicronix.com

MX8682

12-Bit Digital Output Magnetic Flux Sensor

±100 Gauss / 2KHz Conversion Rate

Features:

• Higher Sensitivity Version of the MX8681

• Single 5 Volt Power Supply

• Externally Configurable ±10A Bi-Direction

Current Sense per Turn

• 12-Bit Serial Digital Output

• Full Scale Magnetic Flux Intensity of ±100

Gauss

• 2K Conversions/Second

• Microcontroller Compatible

• Standard 3 Wire Serial Interface plus Chip

Select

• In System Calibration: OTP Full Scale Trim via

the Serial I/O Port

• Programmable Digital Filter Time Constant

• 4mm x 4mm 8 Lead DFN package RoHS

Compliant

Applications:

• Load Detection and Management

• Motor Control

• Power Supplies

Ordering Information

Part No.

Description

Qty

MX8682R

DFN-8 Tube

91

MX8682RTR DFN-8 Tape & Reel

2500

General Description

The MX8682 is a 12 Bit Digital Output Magnetic

Flux Sensor. The device is a complete sampled

data subsystem that converts a magnetic flux

intensity of ±100 Gauss full scale into a 12-bit digital

output word. The sensor operates as a slave on the

serial interface with TTL-level compatible inputs SDI

(serial data input), SCK (serial clock), and CS* (chip

select, active low). Terminal SDO is the tri-state

serial data output.

An adjustable exponentially weighted moving

average digital filter is included that is capable of

improving the signal to noise ratio while reducing

the signal bandwidth. The full scale trim and/or the

digital filter time constant are controllable through

the

serial

I/O

interface

and

are

one-time

programmable through the serial interface (once

programmed, the values are loaded at every power-

on).

The MX8682 can be mounted onto a PCB or

incorporated into a magnetic assembly and then

calibrated in-system through the serial interface.

The operating voltage range is 4.5V to 5.5V.

Functional Block Diagram Typical

Application Circuit

Microcontroller

MX8682

Power

Ground

1

7

4

5

8

PWR

CS*

SDI

SCK

GND

2

SDO

MISO

Select

MOSI

SCK

PWR

GND

Hall

Plate

I/O Reg

A/D

SDI

SCK

SDO

CS*