IXYS

MX8683

1

03/03/08

Drawing No. 0868309

www.claremicronix.com

MX8683

10-Bit Digital Output Magnetic Flux Sensor

±200 Gauss / 20KHz Conversion Rate

Features:

• Single 5 Volt Power Supply

• Externally Configurable ±20A Bi-Direction

Current Sense per Turn

• 12-bit Serial Digital Output / 10-bit ADC

• Full Scale Magnetic Flux Intensity of ±200

Gauss

• 20K 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

MX8683R

DFN-8 Tube

91

MX8683RTR DFN-8 Tape & Reel

2500

General Description

The MX8683 is a 10-bit Digital Output Magnetic Flux

Sensor. The device is a complete sampled data

subsystem that converts a magnetic flux intensity of

±200 Gauss full scale into a 12-bit format digital

output word, (10-bit resolution). 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 optional exponentially weighted moving average

digital filter is included that averages the 10-bit ADC

output into a 12-bit output word. The digital filter has

a transfer function equivalent to a first order low

pass filter.

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 MX8683 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

PWR

GND

Hall

Plate

I/O Reg

10-Bit A/D

SDI

SCK

SDO

CS*

Microcontroller

MX8683

Power

Ground

1

7

4

5

8

PWR

CS*

SDI

SCK

GND

2

SDO

MISO

Select

MOSI

SCK