SX8722I070LF SEMTECH [Semtech Corporation], SX8722I070LF Datasheet

SX8722I070LF

Manufacturer Part Number

SX8722I070LF

Description

High gain acquisition for sensor interface

Manufacturer

SEMTECH [Semtech Corporation]

Datasheet

1.SX8722I070LF.pdf (108 pages)

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The main function of the SX8722 is to acquire signal from

Wheatstone bridges or single ended sensors.

The input can be a pressure sensor, a GMR or AMR

magnetic sensor, a chemical sensor, a thermistor or a mix of

several of these sensors.

The SX8722 Sensor interface is totally configurable through

an I2C compatible interface.

Several parameters are configurable through this interface

such as alarms or signal post processing.

ACS - Revision 4.2

Example of application

Typical pressure & temperature sensing

application with sleep control

ADVANCED COMMUNICATIONS & SENSING

GENERAL DESCRIPTION

APPLICATION

ORDERING INFORMATION

SX8722I070LF

Pressure sensing (industrial, altimeter, diving computer)

Chemical sensing (monitoring, security)

Magnetic sensing (compass)

Evaluation Kit

Part Number

Tools

Differential

Single ended

Temperature Range

-40°C to 125°C

XE8000EV120

Part number

October 2008

AR1P

AR1N

AR2P

AR2N

BIAS

AC7

AC6

AC5

AC4

AC3

AC2

AC1

AC0

SX8722

MLPQ44-7x7

Package

PGA

POST-PROCESS

ZoomingADC

Page 1

ADC

KEY PRODUCT FEATURES

16 + 10 bits differential acquisition

Preamplifier programmable gain up to 1000

Sensor offset compensation up to 15 times full scale of

input signal

4 differential or 7 single ended signal inputs

2 differential reference inputs

I2C compatible connection to application

Internal RC and 32 kHz Oscillators

Low power modes

- Sleep

- Shutdown

4 Full configuration pre selections including:

- ZoomingADC™ configuration

- 2 alarms with on & off thresholds

- Digital filtering

I2C EEPROM interface

Stand alone mode for alarm monitoring

Clock out pin

Calibration pin

Reset pin

Ready / Busy pin

High gain acquisition for sensor interface

CONTROL

POWER

OSC

VMULT

READY

CKOUT

VBATT

ALRM1

ALRM2

RESET

SLEEP

VREG

XOUT

SHUT

GND

CAL

SCL

SDA

XIN

DATASHEET

www.semtech.com

SX8722

VBATT

GPIO

MCU

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