AMS5812-0008-D datasheet, PDF - EEWORLD Datasheet

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AMS5812-0008-D: DescriptionPeizoresistive Sensor, Differential/Relative, 0Psi Min, 0.8Psi Max, 1%, 0.50-4.50V, Square, Through Hole Mount, ROHS COMPLIANT, DIP-8; CategorySensor/transducer Pressure sensor; File Size299KB，12 Pages; ManufacturerAnalogMicroElectronics,Inc.(AME); Environmental Compliance; AMT was founded in Taiwan in November 2000 and merged into AMT Microelectronics, Inc., a US company located in Silicon Valley, California, USA. Its stock was officially listed for public trading in March 2004.

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AMS5812-0008-D Overview

Peizoresistive Sensor, Differential/Relative, 0Psi Min, 0.8Psi Max, 1%, 0.50-4.50V, Square, Through Hole Mount, ROHS COMPLIANT, DIP-8

AMS5812-0008-D Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	AnalogMicroElectronics,Inc.(AME)
Reach Compliance Code	compliant
Maximum accuracy(%)	1%
body width	15.24 mm
body height	16.7 mm
Body length or diameter	15.24 mm
Installation features	THROUGH HOLE MOUNT
Number of digits	14
Maximum working current	5 mA
Maximum operating temperature	85 °C
Minimum operating temperature	-25 °C
Output interface type	I2C INTERFACE
Output range	0.50-4.50V
Output type	ANALOG VOLTAGE
Package Shape/Form	SQUARE
port type	STRAIGHT
Maximum pressure range	0.8 Psi
Minimum pressure range
Pressure sensing mode	DIFFERENTIAL/RELATIVE
Response time	1000 µs
Sensor/Transducer Type	PRESSURE SENSOR,PIEZORESISTIVE
Maximum supply voltage	5.25 V
Minimum supply voltage	4.75 V
surface mount	NO
Termination type	SOLDER
Base Number Matches	1

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AMS 5812

Amplified pressure sensor with analog and digital output (I²C)

FEATURES

•

Amplified, calibrated and temperature

compensated pressure sensor

•

Differential/relative, bidirectional differential,

absolute and barometric versions

•

Ratiometric analog voltage output of

0.5 – 4.5V

•

Digital output for pressure and temperature

via I2C interface

•

High accuracy at RT

•

Small overall error within a temperature

range of -25 ... 85°C

•

Supply voltage range 4.75…5.25V

•

High long term stability

•

Programmable I²C-address

•

Small DIP package

•

Ready to use

•

RoHS compliant

GENERAL DESCRIPTION

AMS 5812 pressure sensors are a series of high-

precision OEM sensors with an analog 0.5 – 4.5 V

voltage output and a digital I2C-interface. They are

calibrated and compensated for across a wide

temperature range of -25 to +85°C.

AMS 5812 comes as a dual in-line package (DIP)

for assembly on printed circuit boards (PCBs) and

is fully operational without the need for any

additional components. The electrical connection is

made via the DIP solder pins; pressure is

connected via two vertical metal tubes.

AMS 5812 combines micromachined, high quality

piezoresistive measuring cells with a modern,

signal conditioning mixed-signal ASIC on a

ceramic substrate. This enables high precision

measurements and excellent drift and long-term

stability.

The sensors in the AMS 5812 series are available

for various applications and pressure ranges:

differential (relative) devices in pressure ranges

from 0 – 0.075 PSI up to 0 – 100 PSI, absolute

pressure variants for 0 – 15 PSI, 0 - 30 PSI and a

barometric type. Bidirectional differential devices

are available from -0.075 /+ 0.075 PSI up to -15/

+15 PSI. Custom specific pressure ranges and

modifications are available on request.

TYPICAL APPLICATIONS

•

Static and dynamic pressure measurement

•

Barometric pressure measurement

•

Vacuum monitoring

•

Gas flow

•

Fluid level measurement

•

Medical instrumentation

•

Heating, Ventilation and Air Conditioning

(HVAC)

Analog Microelectronics GmbH

An der Fahrt 13, D – 55124 Mainz

Phone:+49 (0)6131/91 0730-0

Fax: +49 (0)6131/91 073-30

Internet: www.analogmicro.de

E–Mail: info@analogmicro.de

May 2012 - Rev. 2.0

AMS 5812

Amplified pressure sensor with analog and digital output (I²C)

FUNCTIONAL DESCRIPTION

The pressure sensors in the AMS 5812 series combine a piezoresistive silicon sensing element with a signal

conditioning mixed-signal CMOS ASIC with full digital correction on a ceramic substrate.

The functional principle of the AMS 5812 sensors is explained in

Figure 1.

AMS 5812

TSig

Buffer

OUT

pressure

sensing

element

Amp

MUX

ADC

DAC

EEPROM

I2C

SDA

SCL

GND

VCC

Figure 1:

Functional principle

The physical pressure is measured at AMS 5812's piezoresistive pressure sensing element where the

pressure is converted into a differential voltage signal which is almost proportional to the pressure. This

differential voltage signal is corrected and conditioned by the ASIC in multiple steps.

Firstly, the differential voltage signal from the sensing element is pre-amplified by the amplifier and

transmitted by a multiplexer to the A/D converter (ADC). The ADC converts the signal into digital values with

a resolution of 14 bits. The digitized signal is corrected and calibrated in the follow-on ASIC microcontroller.

Factory precision calibration of AMS 5812 sets the sensor-specific correction coefficients and stores these in

the EEPROM for each sensor. This permits sensor-specific calibration and correction (i.e. temperature

compensation and linearization) of the digitized pressure signal. The temperature signal necessary for

temperature compensation is also measured at the piezoresistive pressure sensing element and is

transmitted by the multiplexer to the ADC, where it is digitized. The ASIC microcontroller runs a cyclic

program which continuously calculates the current standardized and corrected digital pressure values. In

addition, a standardized current digital temperature value is calculated. These calculated 15-bit digital values

(pressure and temperature values) are written to the ASIC output registers and continuously updated

(typically every 0.5 ms).

In order to use the digital signal readout for pressure and temperature, the I2C sensor interface at PIN4

(SDA) and PIN5 (SCL) must be connected to the I2C-bus. The corrected digital values for pressure and

temperature at the I2C-interface are not ratiometric to the supply voltage.

To generate the analog output signal the corrected digital pressure value is converted into an analog voltage

by an 11-bit D/A converter (DAC). The standardized analog output voltage (0.5…4.5V) at the sensor's PIN8

(OUT) is ratiometric to supply voltage.

www.analogmicro.de

May 2012 - Rev. 2.0

Page 5/12

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