MAS6505 datasheet(1/44 Pages) MAS

部件名	MAS6505

功能描述	Piezoresistive Sensor Signal Interface IC

PDF	44 Pages

Scroll/Zoom	100%

制造商	MAS [Micro Analog systems]

网页	http://www.mas-oy.com

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DA6505.005

11 June 2018

1 (44)

MAS6505

Piezoresistive Sensor Signal Interface IC

• Optimized for Piezoresistive

Pressure Sensors

• Very Low Power Consumption

• 1.71V Supply Voltage Operation

• Very Low Noise Analog Front-End

• Ratiometric  ADC

• SPI and I2C Bus

• 512 Bit EEPROM Calibration Memory

DESCRIPTION

MAS6505 is a piezoresistive sensor signal interface

IC with a low noise analog front-end (AFE) and an

Analog-to-Digital

Converter

(ADC).

The

AFE

comprises of a low noise chopper amplifier with 32

selectable gain options from 1x up to 55.8x and an

input signal polarity selection. The ADC employs

delta-sigma (

ΔΣ) A/D conversion technique with

seven

oversampling

ratio

(OSR)

options

for

optimization between speed, power consumption

and resolution.

The ADC’s 1-sigma noise resolution

is up to 17.9 bits in the 1400 mV input signal range

(ISR) of the ADC. Additionally the ADC has eight

input offset options with both polarities to match input

signal range with different sensor signals. The

sensor input 1-sigma noise resolution is down to

0.27

Vrms which can be further reduced with four

digital low pass filtering options.

MAS6505 has one input channel suitable for a

piezoresistive

pressure

sensor.

In addition to

pressure measurement the device can be configured

for temperature measurement. The temperature can

be

measured

either

by

sensing

temperature

dependence of the sensor bridge resistance or using

an external temperature sensing diode. The gain and

offset settings can be configured independently for

the both measurements.

MAS6505 is designed especially to meet the

requirement for low power consumption, thus

making it an ideal choice for battery powered

systems. Overall current consumption values from

1.3 µA up to 25 µA (one pressure and temperature

A/D conversion in a second) can be achieved

depending on selected resolution setting.

A serial bus compatible with 4-wire or 3-wire SPI bus

or 2-wire I2C bus is used for configuring and starting

measurements and reading out the results.

The measurements can be run either at forced mode

(single command based measurement) or at normal

mode (automated measurements) at eight different

output

rates

with

selectable

delays

between

measurement from 0.5ms up to 4000ms. An internal

clock oscillator makes external clock unnecessary.

The 512-bit EEPROM memory is available for

storing trimming and sensor calibration data on chip.

MAS6505 outputs raw measurement results and

calibrated and temperature compensated results

need to be calculated in the application host system

using the sensor calibration data.

FEATURES

APPLICATIONS

•

Supply Voltage 1

.71 V…5.5 V

•

Low Sleep Current Consumption 42nA Typ

•

Very Low Operating Current 1.3

µA…25 µA Typ

•

Very Low Noise Analog Front-End 0.27 µVrms

•

Ratiometric ΔΣ A/D Conversion

•

A/D Conversion Time 1.25

ms…40.02 ms Typ

•

Sensor Resistance Range 3 k

  6 k

•

Seven Resolution Options by OSR Selection

•

Internal Clock Oscillator

•

2-Wire Serial Data Interface (I2C Bus)

•

4- and 3-Wire Serial Peripheral Interface Bus

•

512 Bit EEPROM Memory

•

Digital Piezoresistive Pressure Modules

•

Altimeter and Barometer

•

Temperature measurement

•

Battery Powered Systems

•

Navigation systems

•

Industrial and Process Control Applications

类似零件编号 - MAS6505

制造商	部件名	数据表	功能描述
Micro Analog systems	MAS6501	205Kb / 16P	16-Bit Analog-to-Digital Converter
	MAS6501BA1ST206	205Kb / 16P	16-Bit Analog-to-Digital Converter
	MAS6501BA1WA300	205Kb / 16P	16-Bit Analog-to-Digital Converter
	MAS6502	291Kb / 20P	Piezoresistive Sensor
	MAS6502	39Kb / 3P	Writing data to the EEPROM

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