AMS5812-0015-D_技术文档

DATASHEET AMS 5812 SERIES

Board Mount Pressure Sensor with Analog and I2C Output

FEATURES

GENERAL DESCRIPTION

The OEM pressure sensors in the AMS 5812

series are high-precision sensors with two different

outputs, an analog output and a digital I2C output.

The analog 0.5 to 4.5V output is ratiometric to the

supply voltage and provides pressure measure-

ment data only, while the I2C output provides

pressure as well as temperature measurement

data. Both outputs can be used simultaneously.

 Board mount pressure sensor series with

analog voltage output and digital I2C output

 Calibrated and temperature compensated

 Differential/relative, bidirectional differential,

absolute and barometric sensor versions

 Wide variety of pressure ranges: 0.054 psi

(1.5 inch water) up to 100 psi full scale

AMS 5812 sensors combine a micromachined,

high quality piezoresistive pressure sensing

element with a modern, signal conditioning CMOS-

ASIC on a ceramic substrate. They are extensively

calibrated and temperature compensated in a wide

temperature range of -25 to 85 °C. This enables

high precision measurements and excellent drift

and long-term stability.

 Piezoresistive sensor with high precision

digital signal conditioning

 Total accuracy < 0.5 %FSO at room

temperature for standard pressure ranges

 TEB < 1.0 %FSO (-25 … 85 °C) for standard

pressure ranges

The AMS 5812 pressure sensors come in a

compact and robust dual in-line ceramic package

(DIP) for assembly on printed circuit boards

(PCBs). Two package variants are available: one

with vertical pressure ports for hose connection

and one for O-ring sealing (N-package type for

manifold mount). The sensors are operational

without any additional components.

 High long term stability

 Fast response time (typ. < 1 ms)

 Supply voltage range: 4.75 … 5.25 V

 Analog output: 0.5 to 4.5 V ratiometric

 Digital output via I²C interface: 15 bit for

pressure and temperature measurement

The sensors in the AMS 5812 series are available

for all pressure types in various pressure ranges:

differential (relative) pressure sensors in ranges

from 0 … 0.054 psi up to 0 … 100 psi, absolute

pressure types for 0 … 5 psi up to 0 … 30 psi and

11 … 17.5 psi for barometric measurements.

Bidirectional differential sensors are available from

-0.054 … +0.054 psi up to -15 … +15 psi. Custom

specific pressure ranges and modifications are

available on request.

 Programmable I²C-address

 Ceramic DIP-8 package (width: 0.6 inch)

 Package options for tubing or manifold

mount (O-Ring sealing)

 Substitute product for SM5852 / SM5812

 RoHS compliant

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

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Datasheet AMS 5812 – Rev. 3.0

1/15

Board Mount Pressure Sensor AMS 5812 SERIES

PRESSURE RANGES

Sensor types with vertical pressure ports (metal tubes for hose connection)

Sensor type (code)

Pressure type

Pressure

range

Burst

Pressure

range

Burst

pressure

pressure¹⁾

in psi

in mbar

in bar

Ultra low pressure ranges

AMS 5812-0000-D

AMS 5812-0001-D

AMS 5812-015W-D-B³⁾

AMS 5812-0000-D-B

AMS 5812-0001-D-B

Low pressure ranges

AMS 5812-0003-D

AMS 5812-0004-D

AMS 5812-0008-D

AMS 5812-0015-D

AMS 5812-0003-D-B

AMS 5812-0008-D-B

AMS 5812-0015-D-B

Standard pressure ranges

AMS 5812-0030-D

AMS 5812-0050-D

AMS 5812-0150-D

AMS 5812-0300-D

AMS 5812-0600-D

AMS 5812-1000-D

AMS 5812-0030-D-B

AMS 5812-0050-D-B

AMS 5812-0150-D-B

AMS 5812-0050-A

AMS 5812-0150-A

AMS 5812-0300-A

AMS 5812-0150-B

differential / relative

0 … 0.075

0 … 0.15

> 3

0 … 5.17

0 … 10.34

> 0.2

bidirectional differential -0.054 … +0.054

bidirectional differential -0.075 … +0.075

-3.736 … +3.736

-5.17 … +5.17

-10.34 … +10.34

bidirectional differential

-0.15 … +0.15

differential / relative

bidirectional differential

0 … 0.3

0 … 0.4

> 6

0 … 20.68

0 … 27.58

> 0.4

> 1

0 … 0.8

> 15

> 6

0 … 55.16

0 … 1.5

0 … 103.4

> 1

-0.3 … +0.3

-0.8 … +0.8

-1.5 … +1.5

-20.68 … +20.68

-55.16 … +55.16

-103.4 … 103.4

> 0.4

> 1

> 15

> 1

differential / relative

bidirectional differential

absolute

0 … 3

0 … 5

> 25

> 72

> 232

> 25

> 72

0 … 206.8

0 … 344.7

> 1.7

> 5

0 … 15

0 … 30

0 … 60

0 … 100

-3 … +3

-5 … +5

-15 … +15

0 … 5

0 … 1034

0 … 2068

> 16

> 1.7

> 5

0 … 4137

0 … 6895

-206.8 … +206.8

-344.7 … +344.7

-1034 … +1034

0 … 344.7

> 5

absolute

0 … 15

0 … 30

11 … 17.5

0 … 1034

> 5

absolute

0 … 2068

> 5

absolute (barometric)

758.4 … 1206

> 5

Table 1: AMS 5812 standard pressure ranges (other ranges on request)

Notes:

1) Burst pressure is defined as the maximum pressure which may be applied to one pressure port relative to the other

port (or while only one pressure port is connected) without causing leaks in the sensor.

2) All differential pressure sensors with vertical metal tubes can be ordered with inverted pressure direction for en-

hanced media compatibility in relative pressure measurements (option -I, for more information on ordering codes see

page 14)

3) AMS 5812-015-W-D-B is calibrated from -1.5 to 1.5 inH₂O.

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Datasheet AMS 5812 – Rev. 3.0

2/15

Board Mount Pressure Sensor AMS 5812 SERIES

PRESSURE RANGES continued

Sensor types for manifold assembly (-N package option without tubes for O-ring sealing)

Sensor type (code)

Pressure type

Pressure

range

Burst

Pressure

range

Burst

pressure

pressure¹⁾

in psi

in mbar

in bar

Ultra low pressure ranges

AMS 5812-0000-D-N

AMS 5812-0001-D-N

AMS 5812-015W-D-B-N³⁾

AMS 5812-0000-D-B-N

AMS 5812-0001-D-B-N

Low pressure ranges

AMS 5812-0003-D-N

AMS 5812-0004-D-N

AMS 5812-0008-D-N

AMS 5812-0015-D-N

AMS 5812-0003-D-B-N

AMS 5812-0008-D-B-N

AMS 5812-0015-D-B-N

Standard pressure ranges

AMS 5812-0030-D-N

AMS 5812-0050-D-N

AMS 5812-0150-D-N

AMS 5812-0300-D-N

AMS 5812-0600-D-N

AMS 5812-1000-D-N

AMS 5812-0030-D-B-N

AMS 5812-0050-D-B-N

AMS 5812-0150-D-B-N

differential / relative

0 … 0.075

0 … 0.15

> 3

0 … 5.17

0 … 10.34

> 0.2

bidirectional differential -0.054 … +0.054

bidirectional differential -0.075 … +0.075

-3.736 … +3.736

-5.17 … +5.17

-10.34 … +10.34

bidirectional differential

-0.15 … +0.15

differential / relative

bidirectional differential

0 … 0.3

0 … 0.4

> 6

0 … 20.68

0 … 27.58

> 0.4

> 1

0 … 0.8

> 15

> 6

0 … 55.16

0 … 1.5

0 … 103.4

> 1

-0.3 … +0.3

-0.8 … +0.8

-1.5 … +1.5

-20.68 … +20.68

-55.16 … +55.16

-103.4 … 103.4

> 0.4

> 1

> 15

> 1

differential / relative

bidirectional differential

0 … 3

0 … 5

> 25

0 … 206.8

0 … 344.7

> 1.7

> 5

0 … 15

0 … 30

0 … 60

0 … 100

-3 … +3

-5 … +5

-15 … +15

> 72

0 … 1034

> 232

> 25

0 … 2068

> 16

> 1.7

> 5

0 … 4137

0 … 6895

-206.8 … +206.8

-344.7 … +344.7

-1034 … +1034

> 72

> 5

Table 2: AMS 5812 standard pressure ranges for manifold assembly (-N option, other

ranges on request)

Note:

1) Burst pressure is defined as the maximum pressure which may be applied to one pressure port relative to the other

port (or while only one pressure port is connected) without causing leaks in the sensor.

2) Differential sensor types for manifold assembly (option –N, without tubes) can be ordered with inverted pressure di-

rection for enhanced media compatibility in relative pressure measurements (option –I, for more information on or-

dering codes see page 14).

3) AMS 5812-015-W-D-B-N is calibrated from -1.5 to 1.5 inH₂O.

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Datasheet AMS 5812 – Rev. 3.0

3/15

Board Mount Pressure Sensor AMS 5812 SERIES

MAXIMUM RATINGS

Parameter

Minimum

Typical

Maximum

Units

Maximum supply voltage: V_S,max

Operating temperature: T_op

Storage temperature: T_amb

6.0

85

V

-25

-40

°C

psi

125

175

1)

Common mode pressure p_CM

Table 3: Maximum ratings

Notes:

1) Common mode pressure is defined as the maximum pressure, which can be applied simultaneously on both pressure

ports of a differential or bidirectional pressure sensor without causing damages, while no differential pressure is ap-

plied.

SPECIFICATIONS

All parameters apply to V_S= 5.0 V, p_CM= 0 psi and T_op= 25 °C, unless otherwise stated.

Parameter

Minimum

Typical

Maximum

Units

Analog output signal (pressure only)¹⁾

@ specified minimum pressure (see Table 1 and Table 2)

@ specified maximum pressure (see Table 1 and Table 2)

Full span output (FSO)²⁾

0.5

4.5

4

V

Without pressure (bidirectional differential)

Digital output signal (pressure)³⁾

2.5

@ specified minimum pressure (see Table 1 and Table 2)

@ specified maximum pressure (see Table 1 and Table 2)

Full span output (FSO)

3277

29491

26214

16384

counts

Without pressure (bidirectional differential)

Digital output signal (temperature)⁴⁾

@ minimum temperature T = -25 °C

3277

counts

@ maximum temperature T = 85 °C

29491

Total Accuracy⁵⁾(pressure measurement) @ T_op= 25 °C

Ultra low pressure types (≤ 0.15 psi)

±1.5

±1.0

±0.5

%FSO

Low pressure types (0.15 < p ≤ 1.5 psi)

Standard pressure types (> 1.5 psi)

TEB / Overall error⁶⁾(pressure meas.) @ T_op= -25 … 85 °C

Ultra low pressure types (≤ 0.15 psi)

Low pressure types (0.15 < p ≤ 1.5 psi)

Standard pressure types (> 1.5 psi)

Total error for temperature measurement

All types of AMS 5812 T = -25 … 85 °C

Long term stability

±2.0

±1.5

±1.0

%FSO

±3.0

<0.5

500

%FSO

%FSO/a

ppm

Ratiometricity error (@ V_S= 4.75 … 5.25 V)

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Datasheet AMS 5812 – Rev. 3.0

4/15

Board Mount Pressure Sensor AMS 5812 SERIES

Parameter

Minimum

Typical

14

Maximum

Units

bits

%FSO

bit

Resolution A/D converter

Resolution D/A converter

Resolution analog output signal

Resolution digital output signals

Reaction time (10%...90% rise time)

Supply voltage (V_S)

Current consumption ⁷⁾

Load resistance at output RL

Capacitive load

11

0.05

12

4.75

2k

1

5

2

5.25

5

ms

V

mA



50

nF

I2C-interface

Input High Level

90

0

100

10

% Vs

pF

Input Low Level

Output Low Level

0

10

Load capacitance @ SDA

Clock frequency SCL

Pull-up resistor

400

kHz



500

>10⁶

>10

-25

Pressure cycles (0 to120 % full scale pressure)

Lifetime / MTTF

cycles

years

°C

Compensated temperature range

Weight

85

3

g

Media compatibility

See "Specification notes" ^{8) 9)}

Table 4: Specifications

SPECIFICATION NOTES

1) The analog output signal (pressure measurement only) is ratiometric to the supply voltage.

2) The Full Span Output (FSO) is the algebraic difference between the output signal at the specified maximum

pressure and the output signal at the specified minimum pressure (see Table 1 and Table 2).

3) The digital output pressure signal is not ratiometric to the supply voltage.

4) The digital output temperature signal is not ratiometric to the supply voltage. The temperature value is measured

at the sensor’s piezoresistive sensing element and is the sensor temperature (including self-heating).

5) Total accuracy is defined as the maximum deviation of the measurement value from the ideal characteristic curve

at room temperature (RT) in %FSO including the adjustment error (offset and span), nonlinearity, pressure

hysteresis and repeatability. Nonlinearity is the measured deviation from the best fit straight line (BFSL) across

the entire pressure range. Pressure hysteresis is the maximum deviation of the output value at any pressure

within the specified range when this pressure is cycled to and from the minimum or maximum rated pressure.

Repeatability is the maximum deviation of the output value at any pressure within the specified range after 10

pressure cycles.

6) The TEB (total error band or overall error) is defined as the maximum deviation of the measurement value from

the ideal characteristic curve in %FSO across the entire temperature range (-25 … 85 °C).

7) For use in 4 - 20 mA current-loop applications a customized version with 3.5 mA current consumption is available.

8) Media compatibility of pressure port 1 (for a description of port 1, see Figure 5 and Figure 6): clean, dry gases,

non-corrosive to silicon, RTV silicone rubber, gold, nickel-plated steel (alkaline or acidic liquids can destroy the

sensor).

9) Media compatibility of pressure port 2 (for a description of port 2, see Figure 5 and Figure 6): fluids and gases

non-corrosive to silicon, Pyrex, RTV silicone rubber, nickel-plated steel.

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Datasheet AMS 5812 – Rev. 3.0

5/15

Board Mount Pressure Sensor AMS 5812 SERIES

FUNCTIONAL DESCRIPTION

The pressure sensors in the AMS 5812 series combine a high quality piezoresistive silicon sensing element

with a modern mixed-signal CMOS ASIC for signal-conditioning on a ceramic substrate. This enables a low

total error band, an excellent temperature behavior and high long-term stability.

The functional principle of the AMS 5812 sensors is explained using Figure 1.

Figure 1: Functional principle

The physical pressure applied to AMS 5812’s pressure port(s) is converted into a differential voltage signal at

AMS 5812’s piezoresistive pressure sensing element. This differential voltage, which is roughly proportional

to the applied pressure, is signal-conditioned and converted into a standardized output signal in the following

way:

At first, the sensing element’s differential voltage signal is pre-amplified and transmitted by the multiplexer

block to the A/D converter block (ADC), where it is converted into a digital signal with 14-bit resolution. This

digitized signal is mathematically processed by the ASIC’s integrated microcontroller unit (µC) to obtain a

calibrated and temperature compensated output signal. For this purpose, the µC uses a correction algorithm

and individual correction coefficients which are stored in the ASIC’s EEPROM during AMS 5812’s factory

calibration process. This permits sensor-specific calibration and correction (i.e., linearization and temperature

compensation) of the digitized pressure signal. The temperature signal required for the temperature

compensation is measured at the pressure sensing element and is transmitted via the multiplexer to the

ADC, where it is digitized, too.

The ASIC’s microcontroller unit (µC) executes a cyclic program, which continuously calculates the current

standardized and corrected digital pressure value based on the current digitized pressure and temperature

measurement values and the stored correction coefficients. Additionally, a standardized digital value of the

current temperature is calculated.

The final conditioned digital 15-bit pressure and temperature values are written to the ASIC’s output registers

and continuously updated (typically every 0.5 ms). The readout of these standardized digital pressure and

temperature measurement values, which are not ratiometric to the supply voltage, is done via the sensor’s

I2C interface at PIN4 (SDA) and PIN5 (SCL).

The analog voltage output signal is generated from the current corrected digital pressure value by an 11-bit

D/A converter (DAC). This standardized 0.5 … 4.5 V analog output voltage at the sensor's PIN8 (OUT) is

ratiometric to the supply voltage.

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Datasheet AMS 5812 – Rev. 3.0

6/15

Board Mount Pressure Sensor AMS 5812 SERIES

INITIAL OPERATION

Electrical Connection

The electrical connection of AMS 5812 sensors is typically made by soldering them directly on a printed

circuit board or by mounting them on a suitable socket. The basic circuit of the AMS 5812 sensor with analog

and digital output in use is shown in Figure 2. To use the analog ratiometric voltage output only, it is sufficient

to connect PIN2 (GND), PIN7 (VCC) and PIN8 (OUT). To read the digital output only, it is enough to connect

PIN2 (GND), PIN7 (VCC) and the I2C-bus lines to PIN4 (SDA) and PIN5 (SCL).

Important: For I2C-bus communication, each bus line (SCL and SDA) has to be connected to the positive

supply voltage (pin Vcc or +5.0 V) via a pull-up resistor. Please add pull-up resistors (4.7 kΩ are

recommended) to your bus line if they are not integrated in the I2C-master.

Figure 2: Principle electric circuitry

Pressure Connection

The pressure connection is established by mounting hoses / flexible tubing on the sensor’s metal pressure

ports or by sealing the pressure ports or the N-type package via O-rings to a suitable flange. Depending on

the sensor type and the type of measuring pressure, one or two of the pressure ports are connected to the

measuring medium / volume, as described in the table below:

Sensor type

Pressure type to measure

differential

Port 1

Port 2

Requirement

p₁≥ p₂

connected to p₁

open

connected to p₂

open

AMS 5812-xxxx-D

positive gage

p₁≥ p_ambient

negative gage (vacuum)

differential

connected to p₂

open

P₂≤ p_ambient

connected to p₁

open

p₁≤ p₂

AMS 5812-xxxx-D-I

positive gage

P₂≥ p_ambient

negative gage (vacuum)

connected to p₁

P₁≤ p_ambient

AMS 5812-xxxx-D-B differential (bidirectional)

connected to p₂

not connected

p₁≥ p₂or p₁≤ p₂

p₁= meas. pressure

AMS 5812-xxxx-A

AMS 5812-xxxx-B

absolute pressure

barometric pressure

wherein p₁= pressure at port 1 and p₂= pressure at port 2, for port declaration see Figure 5 and Figure 6.

The media compatibility of pressure port 1 and port 2 can be found in “Specification notes”, 7 and 8.

Notes:

1. For pressure connections up to 30 psi we recommend a silicone tubing (inner diameter Ø = 2 mm, outer diameter

Ø = 6 mm) and above 30 psi PU or PA tubing. Suitable tubing can be found on AMS 5812’s product page.

2. ESD precautions are necessary, it is essential to ground machines and personnel properly during assembly and

handling of the device.

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Datasheet AMS 5812 – Rev. 3.0

7/15

Board Mount Pressure Sensor AMS 5812 SERIES

I2C-INTERFACE

AMS 5812 pressure sensors have a digital output realized via an I2C-interface. When connected to a

bidirectional I2C-bus, the current corrected digital pressure and temperature values can be read from AMS

5812’s output register.

The I2C-bus requires only two bus lines: a serial data line (SDA) and a serial clock line (SCL). SDA and SCL

are bidirectional lines connected to the positive supply voltage via pull-up resistors (see Figure 2).

Communication via the I2C-bus follows a simple master-slave principle. Data transfer is always initialized by

a master (e.g., a microcontroller), which sends a data request to the sensor; the AMS 5812 sensor – which

always operates as slave – responds then.

AMS 5812’s communication protocol follows a standard I2C communication protocol (see Figure 3) ¹.

Figure 3: Standard I²C protocol

¹The I2C-bus is a simple, 8-bit-oriented bus which enables communication between different I2C devices. Each device

connected to the bus can be addressed by software using the device’s unique address.

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Datasheet AMS 5812 – Rev. 3.0

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Board Mount Pressure Sensor AMS 5812 SERIES

The I2C communication phases are as follows:

Idle period (bus is free)

When the bus is free, both I2C-bus lines (SDA and SCL) are pulled up to the supply voltage level ("high

level").

Start S (start condition)

A start condition has to be generated prior to every data transfer on the bus. The start condition is always

sent by the I2C-master and is defined as a transition from “high level” to “low level” on the SDA line while the

SCL line is at "high level". The digital data readout from the AMS 5812 is always initiated by a start condition.

Stop P (stop condition)

The stop condition is always generated by the I2C-master after a data transfer has been completed. The

stop condition is defined as a transition from "low level" to "high level" on the SDA line while the SCL line is

at "high level". The digital data readout from the AMS 5812 is always terminated by a stop condition.

Valid data

Data is transmitted in bytes (8 bits), starting with the most significant bit (MSB). One data bit is transmitted

with each clock pulse. The transmitted bits are only valid when, following a start condition, the level on the

SDA line is constant for as long as the SCL line is at “high level”. Changes to the SDA level must be made

while the SCL line is at “low level”.

Acknowledge A

After the transmission of a byte, the respective receiver (master or slave) has to send an acknowledge

(additional acknowledge bit), which confirms the correct receipt of the data. For this purpose, the master

generates an extra acknowledge-related clock pulse. The receiver sends the acknowledge bit by pulling

down the SDA line to “low level” during the additional clock pulse.

Addressing / Slave address (I2C-address AMS 5812)

After the start condition, the master sends an addressing byte (the first byte after the start condition) that

determines which slave is selected. The addressing byte contains the individual 7-bit slave address of the

selected slave (AMS 5812) and a data direction bit (R/ ). A "0" for the R/ bit indicates a transmission

W

from the master to the slave (W: write; the master wants to transmit data to the selected slave), a "1"

indicates a data request (R: read; the master requests data from the slave).

The pressure sensors in the AMS 5812 series have a default, factory-programmed 7-bit slave address of

0x78_Hex(1111000_bin), which is stored in the sensor’s EEPROM.

If more than one AMS 5812 are to be connected to the same I2C-bus, each pressure sensor requires its in-

dividual slave address. For this purpose, AMS 5812 can be ordered with a second, individually programmed

7-bit slave address. AMS 5812 pressure sensors programmed in this way will then respond to both address-

es. In general, the 7-bit addressing allows 128 different addresses.

Using the AMS 5812 USB Starter Kit the customer can program / change the second individual slave ad-

dress himself.

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Datasheet AMS 5812 – Rev. 3.0

9/15

Board Mount Pressure Sensor AMS 5812 SERIES

DATA READOUT VIA THE I2C-INTERFACE

The digital output values for pressure and temperature (15-bit values) are read from AMS 5812’s output

register via AMS 5812’s I2C-interface. The data readout, which is illustrated in Figure 4, is done byte by byte.

Figure 4: Data readout of the digital pressure and temperature values

A data transfer via the I2C-bus is always initialized by a data request from the I2C-master. For this purpose,

the I2C-master generates a start condition on the I2C-bus lines. After the start condition, the I2C-master

sends the addressing byte containing the 7-bit slave address of the selected pressure sensor (the AMS 5812

slave address is factory programmed to 0x78_Hex= 1111000 ) and the data direction bit R/

= 1 which

W

bin

indicates a data request. The selected pressure sensor first responds with an acknowledge bit and starts the

data transfer from the output register then.

For a complete pressure and temperature value readout, four data bytes are transmitted from the pressure

sensor to the I2C-master. First the two bytes for the current digital pressure value are sent, followed by the

two bytes for the current digital temperature value, always beginning with the most significant byte. On each

transferred data byte the I2C-master sends an acknowledge bit confirming the correct receipt of data. If no

acknowledge bit is generated by the receiving master, the pressure sensor is set to inactive.

The I2C-master terminates the data transfer by sending a stop condition instead of an acknowledge bit. If the

master sends an acknowledge bit after the last of the four data bytes, AMS 5812 continues with the

transmission of the current pressure and temperature value from the output register, again starting with the

most significant pressure byte.

The 15-bit pressure value is derived from the last 7 bits of the first data byte and the 8 bits of the second data

byte, always starting with the most significant bit. The 15-bit temperature value results from the last 7 bits of

the third data byte and the 8 bits of the fourth data byte.

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Datasheet AMS 5812 – Rev. 3.0

10/15

Board Mount Pressure Sensor AMS 5812 SERIES

Calculating the current pressure and temperature value

The digital pressure and temperature values are 15-bit words²(without units) which have to be converted in

order to generate the desired information on pressure and temperature in physical units.

The current pressure in psi (or bar) is calculated from the digital pressure value using the following

equations:

( )

Digoutp

p

− Digoutp

pp = ^{Digoutp p − Digoutp}^min+ p_min

with

SSensp =

(1)

max

min

Sensp

− p

max

min

wherein p is the current pressure in psi³, p_minis the sensor’s specified minimal pressure and p_maxis the

sensor’s specified maximum pressure in psi; depending on the specified pressure range, Digoutp(p) is the

current digital 15-bit pressure value in counts, Digoutp_minand Digoutp_maxare the digital pressure values at

minimum and maximum specified pressure in counts and Sensp is the sensitivity of the pressure sensor in

counts/psi.

The current sensor temperature in °C is calculated from the digital temperature output value using the

following equation:

TT = ^{DigoutT(T) − 3277}∗ 110 °C ꢀ 25 °C

(2)

26214

Example

At the digital output of an AMS 5812-0015-D (0 … 1.5 psi differential pressure sensor) the following data

bytes 1 … 4 are read

Byte 1: 01010101

Byte 2: 00001010

Byte 3: 00111010

Byte 4: 10011010

Taking the last 15 bits of byte 1 and byte 2 the current 15 bit digital pressure value is:

Digoutp(p) = 101010100001010_bin= 550A_Hex= 21770_Deccounts

and with the last 15 bits of byte 3 and byte 4 the digital temperature value is:

DigoutT(T) = 011101010011010_bin= 3A9A_Hex= 15002_Deccounts

Using equation (1) and the specified values for AMS 5812-0015-D: p_min= 0 psi, p_max= 1.5 psi and

Digoutp_min= 3277, Digoutp_max= 29491, the current pressure in psi can be calculated to:

(

)

21770 ꢀ 3277 counts

풑p =

+ 0 psi = 1.058 psi

(

⁄

)

⁄

26214 1.5 counts psi

The current sensor temperature in °C is calculated using equation (2):

(15002 ꢀ 3277) counts

TT =

∗ 110 °C ꢀ 25 °C = 24.2 °C

26214 counts

2

Each pressure and temperature value is transmitted as a 15-bit word; however, the resolution of the internal A/D con-

verter is set to 14 bits.

3

If the current pressure is required in another physical unit, we suggest calculating the current pressure value in psi as

described above and converting the value into the required physical unit then.

www.analog-micro.com

Datasheet AMS 5812 – Rev. 3.0

11/15

Board Mount Pressure Sensor AMS 5812 SERIES

DIMENSIONS AND PINOUT

AMS 5812 pressure sensors come in a dual-in-line package (DIP-08, width: 600 mil) for assembly on printed

circuit boards (PCB).

The pinout and dimensions of AMS 5812’s dual-in-line package are shown in Figure 5 for sensor types with

vertical metal tubes (for connection with pressure hoses) and in Figure 6 for sensor types for manifold

assembly (-N option without tubes).

Figure 5: Dimensions and pinout for AMS 5812’s standard package with vertical metal

tubes

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Datasheet AMS 5812 – Rev. 3.0

12/15

Board Mount Pressure Sensor AMS 5812 SERIES

Figure 6: Dimensions and pinout for AMS 5812’s –N package option (package for man-

ifold assembly without tubes)

Notes on “Dimensions and Pinout” (Figure 5 and Figure 6):

1. Packages with SMT Pins (J-Lead) are available on request.

2. A package variant with one single tube for relative / gage pressure sensors is available on request.

3. Pressure port 2 applies pressure to the piezoresistive silicon sensing element’s backside and is therefore

compatible with non-corrosive liquids. For media compatibility of pressure port 1 and port 2 see “Specification

notes”, 7 and 8.

4. For automatic soldering (lead-free wave or reflow soldering) of AMS 5812 a peak temperature of 250 °C for a

maximum of 20 to 30 seconds is recommended. A typical temperature profile for Pb-free assembly is given by

IPC/JEDEC J-STD-020D, Table 5-2.

5. All sensors in the AMS 5812 series are maintenance free during their lifetime.

www.analog-micro.com

Datasheet AMS 5812 – Rev. 3.0

13/15

Board Mount Pressure Sensor AMS 5812 SERIES

INFORMATION FOR ORDERING

Ordering code:

Pressure range code

psi

0.054

0.075

0.15

0.3

mbar

3.73

kPa

015W

0000

0001

0003

0004

0008

0015

0030

0050

0150

0300

0600

1000

0.373

0.517

1.034

2.068

2.758

5.516

10.34

20.68

34.47

103.4

206.8

413.7

689.5

5.17

10.34

20.68

27.58

55.16

103.4

206.8

344.7

1034

2068

4137

6895

0.4

0.8

1.5

3.0

5.0

15

30

60

100

Code

Pressure Type

Available pressure ranges

D

Differential / relative (gage)

Inverted differential / relative (gage)

Bidirectional differential

Absolute

0 … 0.075 psi to 0 … 100 psi

-0.054 … +0.054 psi to -100 … +100 psi

0 … 5 psi to 0 … 30 psi

D-I

D-B

A

B

Barometric (absolute)

11 … 17.5 psi

Code

N

Package option

Available pressure ranges

0 … 0.075 psi to 0 … 100 psi

Standard package

Manifold mount package

www.analog-micro.com

Datasheet AMS 5812 – Rev. 3.0

14/15

Board Mount Pressure Sensor AMS 5812 SERIES

ADDITIONAL EQUIPMENT

Ordering code

Description

USB starter kit AMS 5812

A USB starter kit interfacing AMS 5812 to a Windows PC (Windows XP, 7 or

10) via a USB port. It consists of two PCBs and software. The kit can be used

for quick and easy evaluation of AMS 5812, data readout, data logging and to

change AMS 5812’s I2C address.

AMS 5812 – Arduino PCB

An adapter PCB board, which can be used to interface AMS 5812 with an Ar-

duino Uno. A library and example code for Arduino’s IDE are available for

download at www.analog-micro.com

AMS 5812 Arduino Nano Kit

A kit used to interface AMS 5812 to an Arduino Nano directly. It consists of

two PCBs, an AMS Arduino Nano Shield and an AMS 5812 Mini PCB, as well

as a matching ribbon cable. A library and example code for Arduino’s IDE is

available for download at www.analog-micro.com

For more information on additional equipment see AMS 5812's product page

Analog Microelectronics GmbH

An der Fahrt 13

Phone: +49 (0) 6131/91 073-0

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

55124 Mainz

Germany

Internet: www.analog-micro.com

E-Mail: info@analogmicro.de

Analog Microelectronics GmbH reserves the right to amend any dimensions, technical data or other information contained herein without prior notification.

www.analog-micro.com

Datasheet AMS 5812 – Rev. 3.0

15/15


型号：	AMS5812-0015-D
厂家：	Analog Microelectronics
描述：	Board Mount Pressure Sensor with Analog and I2C Output
文件：	总15页 (文件大小：1569K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AMS5812-0015-D [ANALOGMICRO]

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