1 PSI-D-DO-PCB - All Sensors - Datasheet.Technology

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Enhanced Digital Output Sensors PCB version

Digital Output Pressure Sensors

• Medical Instrumentation

• Environmental Controls

• HVAC

• Meteorology

Applications

• 5” H2O to 100psi Pressure Ranges

• All Combined Errors Over Temperature Less Than 0.1%, Typical

• Wide -20 to 85°C Compensated Temperature Range

• Enhanced Dual Serial Interface Mode

• Electrically and mechanically compatible with General Sensors GA-

series and Sensym SMRT series.

Features

The Digital Output pressure sensors are based upon a proprietary surface mapping technology to produce a fully digital output

that virtually eliminates all repeatable errors over temperature and pressure. This series provides a 12 bit digital serial output

(14 bit in High Resolution Mode) with superior offset, span and linearity characteristics. The output is SPI and MICROWIRE/

PLUS® compatible as well as fully compatible with the All Sensors GA142 Series sensors.

In addition to synchronous communications, the Digital Output pressure sensors incorporates a bi-directional, TTL level,

asynchronous serial interfaces mode (hardware selectable 9,600 or 19,200 baud). This mode includes a command set that

allows the host to interrogate the sensor for model information, pressure range, serial number, pressure units and conversion

factor. The command set also allows the host to select a high resolution output mode, make minor adjustments to offset and

has an addressable feature that alows multiple sensors to be tied to the same interface buss.

This series is intended for use with non-corrosive, non-ionic working fluids such as air, dry gases and the like. All signals are 5V

TTL/CMOS compatible.

General Description

Physical Dimensions

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Absolute Maximum Ratings

Operating Voltage

Compensated Temperature

Operating Temperature

Storage Temperature

Humidity Limits

+4.75Vdc to +5.25Vdc

-20° C to +85° C

-25 to +90° C

-40 to 125° C

0 to 95% RH

(non condensing)

Environmental Specifications

Supply Voltage (Vcc)

Voltage on Any Pin with Respect to Gnd

Common-mode pressure

Lead Temperature (soldering 2-4 sec.)

7Vdc

-0.6 to Vcc+0.6V

50 psig

250°C

Nominal

0.25

Minimum

Parameter (1)

Overall Accuracy (5)

Long Term Drift (one year)

Offset Position Sensitivity (1g)

Offset Warm-up Shift (3)

Maximum

0.5

0.03

0.25

Units

%FSO

Performance Characteristics for 10 INCH-D-DO-PCB and 1 PSI-D-DO-PCB

Nominal

0.25

Minimum

Parameter (1)

Overall Accuracy (5)

Long Term Drift (one year)

Offset Position Sensitivity (1g)

Offset Warm-up Shift (3)

Maximum

0.5

0.05

0.25

Units

%FSO

Performance Characteristics for 5 INCH-D-DO-PCB

Nominal

Minimum

Parameter (1)

Resolution

Conversion Speed

Supply Current

Maximum

Units

Bit

General Performance Characteristics (All Models)

Standard Pressure Ranges

Operating

Pressure

-5 to 5

-10 to 10

-1 to 1

-5 to 5

-15 to 15

0 to 15

-30 to 30

0 to 30

-100 to 100

0 to 100

Proof

Pressure

200 inH2O

10 PSI

60 PSI

90 PSI

200 PSI

Burst

Pressure

300 inH2O

30 PSI

120 PSI

150 PSI

250 PSI

Part Number

5 INCH-D-DO-PCB

10 INCH-D-DO-PCB

1 PSI-D-DO-PCB

5 PSI-D-DO-PCB

15 PSI-D-DO-PCB

15 PSI-A-DO-PCB

30 PSI-D-DO-PCB

30 PSI-A-DO-PCB

100 PSI-D-DO-PCB

100 PSI-A-DO-PCB

Digital

Span (4)

FSO (2)

100

Units

inH2O

PSI

PSIA

PSI

PSIA

PSI

PSIA

GA-series

part Number

GA142x0NW10D

GA142x1P1D

GA142x5P5D

GA142x15P15D

GA142x0P15A

GA142x0P30D

GA142x0P30A

GA142x0P100D

GA142x0P100A

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Synchronous Communications

Typical synchronous communications

configuration (compatible with All

Sensors GA142 Series Digital Output

Sensors).

Typical Configurations

Asynchronous Communications

Typical asynchronous communications

configuration. The Mode pin is

interrogated at power up and if tied low,

will cause the sensor to enter asynchro-

nous communications mode. This mode

supports multiple sensors by addressable

commands. The Convert/BR pin then

serves to select one of two available

baud rates.

Host

System Sensor

Convert

/BR

Ready

/Mode

Clock

/SO

Data

/SI

Host

System

Sensor

(1)

Sensor

(n)

Convert/

Ready/

Mode

Clock/

Data/

Convert/

Ready/

Mode

Clock/

Data/

Nominal

0.10

Minimum

Parameter (1)

Overall Accuracy (5)

Long Term Drift (one year)

Maximum

0.25

Units

%FSO

Performance Characteristics for 5 PSI-D-DO-PCB through 100 PSI-x-DO-PCB

Specification Notes

NOTE 1: UNLESS OTHERWISE SPECIFIED, ALL PARAMETERS ARE MEASURED AT 5.0 VOLT SUPPLY, POSITIVE PRESSURE APPLIED TO PORT B.

NOTE 2: THE DIGITAL OUTPUT IS A 16 BIT SIGNED BINARY OUTPUT IN A TWO’S COMPLIMENT FORMAT. THE APPLIED PRESSURE IS COMPUTED USING THE PRESSURE

CONVERSION TABLE (BELOW). THE MODE COLUMN IDENTIFIES THE RESOLUTION OPERATING MODE OF THE DEVICE (A = STANDARD RESOLUTION, B = HIGH

RESOLUTION). FSO AND UNITS ARE SHOWN FOR EACH MODEL.

NOTE 3: SHIFT IS WITHIN THE FIRST HOUR OF EXCITATION APPLIED TO THE DEVICE.

NOTE 4: DIGITAL SPAN IS DEPENDENT ON THE RESOLUTION OPERATING MODE. REFER TO THE DIGITAL SPAN TABLE (BELOW) TO IDENTIFY THE DIGITAL SPAN OF THE

SPECIFIC MODEL. IN THE EVENT OF AN OVER-PRESSURE OR UNDER-PRESSURE CONDITION, THE DIGITAL OUTPUT WILL ONE COUNT HIGHER OR ONE COUNT LOWER

(RESPECTIVELY) TO THE LISTED DIGITAL SPAN TO INDICATE THE CONDITION.

NOTE 5: OVERALL ACCURACY INCLUDES THE COMBINED EFFECTS OF OFFSET AND SPAN SHIFTS OVER TEMPERATURE, LINEARITY, HYSTERESIS, AND OFFSET AND SPAN

CALIBRATION.

Pressure Conversion Table

10,000

Pout = Digital Output x FSO x Units

32,767

Pout = Digital Output x FSO x Units

Pressure Output EquationMode

Digital Span Table

-10,399 to 10,399

-399 to 10,399

Mode S (Standard) Mode H (High Res)

-32,767 to 32,766

-999 to 32,766

Span

25,054 to 10,399 17,501 to 32,7663

Bit 0 : Part not compensated

Bit 1 : Tdex Overflow

Bit 2 : Tdex Over-range

Bit 3 : Pdex Overflow

Bit 4 : Pdex Over-range

Bit 5 : PWL Overflow

Bit 6 : Scaling Overflow

Bit 7 : High resolution overflow

Bit 8 : Pressure Output Limited to Specified Value

Bit 9 through Bit 15 : Reserved

Error Code Table (Asynchronous mode)

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Asynchronous Command Summary (1,2)

Command

WD<Mode>

WO<Offset>

U<S/N><Cmd>

Description

Read Mode Setting

Read Model Information

Read User Offset Setting

Read Pressure

Read Device Pressure Range

Read Serial Number

Write Mode Setting (“S” = Standard, “H” = High Resolution)

Write User Offset Setting

Select Unique Part for following command (for multidrop configura-

tions).

t2 t10 t2

t9t4 t8

t6 t7

Bit

MSB

Bit

14 Bit

13 Bit

12 Bit

11 Bit

10 Bit

9Bit

8Bit

7Bit

6Bit

5Bit

4Bit

3Bit

2Bit

1Bit

LSB

READY [Output]

CONVERT [Input]

CLOCK [Output]

DATA [Output]

Ref Parameter Min Typ Max Units

t1 Conversion Time -- 8 16 msec

t2 Ready to Convert 0-- -- usec

t3 Convert to Clock 24 32 39 usec

t4 Clock Period -- 16 -- usec

t5 Clock High Time -- 8-- usec

Ref Parameter Min Typ Max Units

t6 Data Setup Time -- 3-- usec

t7 Data Hold Time -- 3-- usec

t8 Interbyte Delay -- 57 -- usec

t9 Clock to Ready -- 14 -- usec

t10 Data Transmission -- 335 -- usec

Synchronous Timing Diagram (Note: Asynchronous mode timing is per RS-232)

Response

RD=<Mode>

RM=<Model String>

RO=<hhhh>

RP=<hhhh>

RR=<Range String>

RS=<Serial Number String>

WD=<Mode>

WO=<hhhh>

U<S/N><Cmd>

All Sensors reserves the right to make changes to any products herein. All Sensors does not assume any liability arising out of the application or use of any product or

circuit described herein, neither does it convey any license under its patent rights nor the rights of others.

® MICROWIRE/PLUS IS A REGISTERED TRADEMARK OF NATIONAL SEMICONDUCTOR.

Asynchronous Command Notes

NOTE 1: ALL COMMANDS AND RESPONSES ARE IN ASCII CHARACTER FORMAT AND ARE TERMINATED BY A CARRIAGE RETURN (CARRIAGE RETURNS ARE NOT SHOWN

IN COMMAND AND RESPONSE TABLE). EXAMPLE: THE READ HIGH RESOLUTION PRESSURE COMMAND (REPRESENTED BY: RH< CR>) IS GIVEN BY THE

FOLLOWING THREE BYTE SEQUENCE: 0X52 0X48 0X0D

NOTE 2: <hhhh> IS A FOUR BYTE ASCII STRING REPRESENTING A 16-BIT SIGNED VALUE. EXAMPLE: RH=2B7D REPRESENTS THE RESPONSE OF AN RH COMMAND

WITH THE PRESSURE OUTPUT OF 0X2B7D (11,133 DECIMAL) VALUE.

NOTE 3: <LLLL> IS A FOUR BYTE ASCII STRING REPRESENTING THE LOW RESOLUTION OUTPUT (SIMILAR TO THE HIGH RESOLUTION RESPONSE OF NOTE 2)

NOTE 4: <eeee> IS A 16-BIT ERROR CODE. THE REPRESENTATION IS FOUR BYTE ASCII STRING (EXPRESSING A DOUBLE-BYTE OR 16-BITS). A “NO ERROR” CONDITION

IS EXPRESSED AS “0000’ WHERE AN ERROR IS EXPRESSED BY SETTING AN INDIVIDUAL BIT OF THE ERROR WORD AND PRESENTING IT IN ASCII HEX FORMAT.

NOTE 5: {NULL} IS A NULL RESPONSE (NO RESPONSE). THE INTENT UTILITY OF THE COMMAND IS TO APPLY THIS COMMAND IN A MULTIDROP CONFIGURATION (BUSSED

CONFIGURATION) AND SIMULANEOUSLY CAPTURE THE PRESSURE OF ALL OF THE DEVICES ON THE BUSS. THE CAPTURED READINGS CAN SUBSEQUENTLY BE READ

USING THE U COMMAND (SELECT UNIQUE PART) INCONJUNCTION WITH THE RC COMMAND. EXAMPLE: U<S/N>RC<CR>