MX8681R

MX8681R Datasheet

MX8681

Part	Datasheet
MX8681R	MX8681R (pdf)

Related Parts	Information
MX8681RTR	MX8681RTR

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IXYS MX8681 12-Bit Digital Output Magnetic Flux Sensor ±200 Gauss / 2KHz Conversion Rate Features: • Higher Sensitivity Version of the MX868 • Single 5 Volt Power Supply • Externally Configurable ±20A Bi-Direction Current Sense per Turn • 12-Bit Serial Digital Output • Full Scale Magnetic Flux Intensity of ±200 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 The MX8681 is a 12 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 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 poweron . The MX8681 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. Ordering Information MX8681R DFN-8 Tube MX8681RTR DFN-8 Tape & Reel Qty 91 2500 Functional Block Diagram Typical Application Circuit PWR GND Hall Plate I/O Reg A/D SDI SCK SDO CS* Power MISO Select Microcontroller MOSI SCK Ground 1 PWR 2 SDO CS* MX8681 5 SDI 4 SCK GND 7 MX8681 Drawing No. 0868109 03/03/08 MX8681 Absolute Maximum Ratings TA = +25°C unless otherwise noted Parameter Min Max Unit Voltage Any Pin to GND DFN-8 Package 30 °C/W Operating Temperature Range -40 +85 °C Storage Temperature Range -65 150 °C IXYS ESD Warning ESD electrostatic discharge sensitive device. Although the MX8681 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Electrical Characteristics PWR= 5V, T = +25°C Parameter Operating Voltage Range PWR Supply Current IPWR Average A/D Reading Average A/D Reading Condition Zero Magnetic Flux 100 Gauss, North Pole 2040

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IXYS

MX8681
12-Bit Digital Output Magnetic Flux Sensor ±200 Gauss / 2KHz Conversion Rate

Features:
• Higher Sensitivity Version of the MX868
• Single 5 Volt Power Supply
• Externally Configurable ±20A Bi-Direction

Current Sense per Turn
• 12-Bit Serial Digital Output
• Full Scale Magnetic Flux Intensity of ±200

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

The MX8681 is a 12 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 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 poweron .

The MX8681 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.
Ordering Information

MX8681R DFN-8 Tube

MX8681RTR DFN-8 Tape & Reel

Qty 91 2500

Functional Block Diagram Typical

Application Circuit

PWR GND

Hall Plate

I/O Reg A/D

SDI SCK SDO CS*

Power

MISO Select Microcontroller MOSI SCK

Ground
1 PWR
2 SDO

CS* MX8681
5 SDI
4 SCK GND 7

MX8681

Drawing No. 0868109
03/03/08

MX8681

Absolute Maximum Ratings TA = +25°C unless otherwise noted

Parameter

Min Max Unit

Voltage Any Pin to GND

DFN-8 Package
30 °C/W

Operating Temperature Range -40 +85 °C

Storage Temperature Range
-65 150 °C

IXYS

ESD Warning

ESD electrostatic discharge sensitive device. Although the MX8681 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

Electrical Characteristics

PWR= 5V, T = +25°C

Parameter Operating Voltage Range PWR Supply Current IPWR Average A/D Reading

Average A/D Reading

Condition

Zero Magnetic Flux 100 Gauss, North Pole
2040

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Datasheet ID: MX8681R 644421