• All Combined Errors Over Temperature Less Than 0.1%, Typical
• Wide -20 to 85°C Compensated Temperature Range
• Electrically Compatible to All Sensors GA142 Series
• Enhanced Dual Serial Interface Mode
Applications
• Medical Instrumentation
• Environmental Controls
• HVAC
• Meteorology
General Description
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.
Pin Descriptions
0.10 Typical
(2.54)
0.25
(6.4)
Pin Size
0.010 x 0.020
(0.25 x 0.50)
0.174 to 0.190
(4.4 to 4.8)
Pin Label
1 Vcc
2
0.21
(5.3)
Description
+5V power supply input
Data output for synchronous
mode. Serial in for asynchro-
nous mode.
Clock output for synchronous
mode. Serial out for asynchro-
nous mode.
Pin 1 2 3 4 5 6
1
Data/SI
3
Clock/SO
A
1.08
(27.4)
0.63
(16.0)
B
0.414
(10.5)
4
Ready/Mode Ready output for synchronous
mode. Selects asynchronous
mode when held low during
reset.
Convert/BR
Convert input for synchronous
mode. Selects one of two
baud rates for asynchronous
mode (low=9,600,
high=19,200).
Ground for power and signals
0.48
(12.2)
0.55
(14.0)
0.80
(20.3)
0.85
(21.6)
1.10
(27.9)
5
NOTES:
1) Dimensions in inches (millimeters)
6
Ground
all sensors
01
a
62 96 Sa n Ign acio, Suite E & F, San Jose, CA 95 119
Physical Dimensions
p
4 08 225 431 4
f
4 08 225 207 9
e
w ww.allsen sor s.c om
all sensors
Absolute Maximum Ratings
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
Environmental Specifications
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)
Proof Pressure
200 inH2O
200 inH2O
200 inH2O
200 inH2O
5 PSI
10 PSI
60 PSI
60 PSI
60 PSI
90 PSI
90 PSI
200 PSI
200 PSI
Burst Pressure
300 inH2O
300 inH2O
500 inH2O
800 inH2O
15 PSI
30 PSI
120 PSI
120 PSI
120 PSI
150 PSI
150 PSI
250 PSI
250 PSI
Standard Pressure Ranges
Part Number
5 INCH-D-DO
10 INCH-D-DO
20 INCH-D-DO
30 INCH-D-DO
1 PSI-D-DO
5 PSI-D-DO
15 PSI-D-DO
15 PSI-A-DO
BARO-DO
30 PSI-G-DO
30 PSI-A-DO
100 PSI-G-DO
100 PSI-A-DO
Operating Pressure
-5 to 5
-10 to 10
-20 to 20
-30 to 30
-1 to 1
-5 to 5
-15 to 15
0 to 15
600 to 1100
0 to 30
0 to 30
0 to 100
0 to 100
Units
inH2O
inH2O
inH2O
inH2O
PSI
PSI
PSI
PSIA
mBar
PSI
PSIA
PSI
PSIA
FSO
(2)
5
10
20
30
1
5
15
15
1100
30
30
100
100
Digital Span
(4)
1
1
1
1
1
1
1
2
3
2
2
2
2
General Performance Characteristics (All Models)
Parameter
(1)
Resolution
Conversion Speed
Supply Current
Minimum
12
--
--
Nominal
--
8
8
Maximum
--
16
12
Units
Bit
mS
mA
Performance Characteristics for 5 INCH-D-DO
Parameter
(1)
Overall Accuracy
(5)
Minimum
--
--
--
--
Nominal
0.25
--
--
--
Maximum
0.5
0.5
0.05
0.25
Units
%FSO
%FSO
%FSO
%FSO
Long Term Drift (one year)
Offset Position Sensitivity (1g)
Offset Warm-up Shift
(3)
Performance Characteristics for 10 INCH-D-DO, 20 INCH-D-DO and 30 INCH-D-DO
Parameter
(1)
Overall Accuracy
(5)
Minimum
--
--
--
--
Nominal
0.25
--
--
--
Maximum
0.5
0.5
0.03
0.25
Units
%FSO
%FSO
%FSO
%FSO
Long Term Drift (one year)
Offset Position Sensitivity (1g)
Offset Warm-up Shift
(3)
02
digital output pressure sensors
Performance Characteristics for 10 INCH-D-DO, 20 INCH-D-DO and 30 INCH-D-DO
Parameter
(1)
Overall Accuracy
(5)
Minimum
--
--
--
--
Nominal
0.25
--
--
--
Maximum
0.5
0.5
0.03
0.25
Units
%FSO
%FSO
%FSO
%FSO
Long Term Drift (one year)
Offset Position Sensitivity (1g)
Offset Warm-up Shift
(3)
Performance Characteristics for BARO-DO
Parameter
(1)
Overall Accuracy
(5)
Minimum
--
--
Nominal
1.0
--
Maximum
2.5
2.0
Units
mBar
mBar
Long Term Drift (one year)
Parameter
(1)
Overall Accuracy
(5)
Minimum
--
--
Nominal
0.10
--
Maximum
0.25
0.25
Units
%FSO
%FSO
Long Term Drift (one year)
NOTE
NOTE
1: U
NLESS OTHERWISE SPECIFIED
,
ALL PARAMETERS ARE MEASURED AT
5.0
VOLT SUPPLY
,
POSITIVE PRESSURE APPLIED TO
P
ORT
B.
2: T
HE DIGITAL OUTPUT IS A
16
BIT SIGNED BINARY OUTPUT IN A TWO
’
S COMPLIMENT FORMAT
. T
HE APPLIED PRESSURE IS COMPUTED USING THE
P
RESSURE
C
ONVERSION
T
ABLE
(
BELOW
). T
HE
M
ODE COLUMN IDENTIFIES THE RESOLUTION OPERATING MODE OF THE DEVICE
(A = S
TANDARD RESOLUTION
, B =
H
IGH RESOLUTION
). FSO
AND
U
NITS ARE SHOWN FOR EACH MODEL
.
3: S
HIFT IS WITHIN THE FIRST HOUR OF EXCITATION APPLIED TO THE DEVICE
.
4: D
IGITAL
S
PAN IS DEPENDENT ON THE RESOLUTION OPERATING MODE
. R
EFER TO
LOWER
(
RESPECTIVELY
)
TO THE LISTED
NOTE
NOTE
SPECIFIC MODEL
. I
N THE EVENT OF AN OVER
-
PRESSURE OR UNDER
-
PRESSURE CONDITION
,
THE DIGITAL OUTPUT WILL ONE COUNT HIGHER OR ONE COUNT
D
IGITAL
S
PAN TO
INDICATE THE CONDITION
.
NOTE
5: O
VERALL
ACCURACY INCLUDES THE COMBINED EFFECTS OF OFFSET AND SPAN SHIFTS OVER TEMPERATURE
,
LINEARITY
,
HYSTERESIS
,
AND OFFSET AND SPAN
CALIBRATION
.
Digital Span Table
Span
1
2
3
Mode S (Standard)
-10,399 to 10,399
-399 to 10,399
5,054 to 10,399
Mode H (High Res)
-32,767 to 32,766
-999 to 32,766
17,501 to 32,766
Pressure Conversion Table
Mode
S
H
Pressure Output Equation
P_Out
Digital_Out
FSO
•
Units
•
10
,
000
FSO
•
Units
•
32
,
767
P_Out
Digital_Out
Typical Configurations
Synchronous Communications
Typical synchronous communications
configuration (compatible with All
Sensors GA142 Series Digital Output
Sensors).
Host
System
Sensor
Clock/SO
Data/SI
Convert/BR
Ready/Mode
Asynchronous Communications
Typical asynchronous communications
configuration. The Mode pin is
interrogated at power up and if tied
low, will cause the sensor to enter
asynchronous communications mode.
This mode supports multiple sensors by
addressable commands. The Convert/
BR pin then serves to select one of two
available baud rates.
Sensor
(n)
Clock/SO
Data/SI
Convert /BR
Ready/Mode
Sensor
(1)
Host
System
Clock/SO
Data/SI
Convert /BR
Ready/Mode
all sensors
a
62 96 Sa n Ign acio, Suite E & F, San Jose, CA 95 119
p
4 08 225 431 4
THE
D
IGITAL
S
PAN
T
ABLE
(
BELOW
)
TO IDENTIFY THE DIGITAL SPAN OF THE
f
4 08 225 207 9
Specification Notes
e
w ww.allsen sor s.c om
Performance Characteristics for 1 PSI-D-DO through 100 PSI-A-DO (except BARO-DO)
all sensors
Asynchronous Command Summary
(1,2)
Command
RD
RM
RO
RP
RR
RS
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
configurations).
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>
Asynchronous Command Notes
NOTE
1: A
LL
COMMANDS AND RESPONSES ARE IN
IN COMMAND AND RESPONSE TABLE
).
SEQUENCE
: 0
X
52 0
X
50 0
X
0D
2: <
HHHH
>
IS A FOUR BYTE
ASCII
WITH THE PRESSURE OUTPUT OF
ASCII
CHARACTER FORMAT AND ARE TERMINATED BY A
C
ARRIAGE
R
ETURN
(C
ARRIAGE
R
ETURNS ARE NOT SHOWN
E
XAMPLE
: T
HE
R
EAD
P
RESSURE COMMAND
(
REPRESENTED BY
: RP<
CR
>)
IS GIVEN BY THE FOLLOWING THREE BYTE
VALUE
.
NOTE
STRING REPRESENTING A
16-
BIT SIGNED
0
X
2B7D (11,133
DECIMAL
)
VALUE
.
E
XAMPLE
: P=2B7D
REPRESENTS THE RESPONSE OF AN
RP
COMMAND
Synchronous Timing Diagram
(Note: Asynchronous mode timing is per RS-232)
READY [Output]
t1
t2
CONVERT [Input]
t3
t4
t5
CLOCK [Output]
t6
t7
DATA [Output]
Bit
15
MSB
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
LSB
t10
t2
t8
t9
Ref
t1
t2
t3
t4
t5
Parameter
Conversion Time
Ready to Convert
Convert to Clock
Clock Period
Clock High Time
Min
--
0
24
--
--
Typ
8
--
32
16
8
Max
16
--
39
--
--
Units
msec
usec
usec
usec
usec
Ref
t6
t7
t8
t9
t10
Parameter
Data Setup Time
Data Hold Time
Interbyte Delay
Clock to Ready
Data Transmission
Min
--
--
--
--
--
Typ
3
3
57
14
335
Max
--
--
--
--
--
Units
usec
usec
usec
usec
usec
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.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
