DLLR - High Accuracy Pressure Sensors Series
Table of Contents
Features & Applications ................................... 2
Standard Pressure Ranges ................................ 2
Pressure Sensor Maximum Ratings................... 2
Environmental Specifications ........................... 2
Electrical Block Diagram ................................. 2
Performance Characteristics ............................ 3
I
2
C / SPI Electrical Parameters ......................... 4
Device Ordering Options ................................ 5
Operation Overview ..................................... 6-7
Digital Interface Command Formats ................ 8
Digital Interface Data Format .......................... 9
I
2
C Interface ............................................... 9-10
SPI Interface .................................................. 11
Interface Timing Diagrams ............................ 12
Extended Compensation Instructions ........ 13-15
How to Order Guide ..................................... 16
Dimensional Package Drawings
SIP ..................................................... 17-18
DIP .................................................... 19-20
SMT ........................................................ 21
Suggested Pad Layout .................................... 22
The DLLR Series Mini Digital Output Sensor is based on
All Sensors’ CoBeam
2 TM
Technology. This reduces package
stress susceptibility, resulting in improved overall long term
stability and vastly improves the position sensitivity.
The digital interface eases integration of the sensors into a
wide range of process control and measurement systems,
allowing direct connection to serial communications chan-
nels. For battery-powered systems, the sensors can enter very
low-power mode between readings to minimize load on the
power supply.
These calibrated and compensated sensors provide accurate,
stable output over a wide temperature range. This series
is intended for use with non-corrosive, non-ionic working
fluids such as air, dry gases.
https://www.allsensors.com/products/dllr-series
Introduction
All Sensors
DS-0358 Rev A
Page 1
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DLLR Series High Accuracy Pressure Sensors
Features
•
10 & 30 inH2O Pressure Ranges
• 1.68V to 3.6V Supply Voltage Range
• I2C or SPI Interface (Automatically Selected)
• Better Than 0.10% Accuracy
• High Resolution 16/17/18 Bit Output
Applications
• Medical Breathing
•
Environmental Controls
•
HVAC
• Industrial Controls
• Portable/Hand-Held Equipment
Standard Pressure Ranges
Device
DLLR-L10D
DLLR-L10G
DLLR-L30D
DLLR-L30G
Operating Range
inH2O
± 10
0 to 10
± 30
0 to 30
A
Proof Pressure
Pa
inH2O
100
100
100
100
kPa
25
25
25
25
Burst Pressure
inH2O
300
300
300
300
kPa
75
75
75
75
Nominal Span
Counts
±0.4 * 2
24
±0.4 * 2
24
0.8 * 2
24
0.8 * 2
24
2488.4
2488.4
7465.2
7465.2
Note A: Operating range in Pa is expressed as an approximate value.
Supply Voltage (Vs)
Common Mode Pressure
Lead Temperature (soldering 2-4 sec.)
3.63 Vdc
10 psig
270 °C
For SIP Packages
Vs
SCL
I2C
SDA
Gnd
For DIP and J-Lead Packages
Environmental Specifications
Temperature Ranges
Compensated:
Operating
Storage
Commercial
0°C
to 70°C
-25°C to 85 °C
-40°C to 125 °C
0 to 95% RH
Humidity Limits (non condensing)
SPI
Vs
SCLK
MISO
MOSI
/SS
EOC
Gnd
Vs
SCL
- OR
-
I2C
SDA
EOC
Gnd
All Sensors
DS-0358 Rev A
Page 2
Table of Contents
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Pressure Sensor Maximum Ratings
Electrical Block Diagram
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Performance Characteristics for DLLR Series High Accuracy Low Pressure Sensors
All parameters are measured at ±3.3V ±5% excitation and 25C unless otherwise specified
(Note 9)
. Pressure measurements are
with positive pressure applied to PORT B.
Parameter
Output Span
LxxD
LxxG
Offset Output @ Zero Diff. Pressure (OS
dig
)
LxxD
LxxG
Error Summary
L10D
Total Error Band
Span Temperature Shift
Offset Temperature Shift
Accuracy
L10G
Total Error Band
Span Temperature Shift
Offset Temperature Shift
Accuracy
L30D
Total Error Band
Span Temperature Shift
Offset Temperature Shift
Accuracy
L30G
Total Error Band
Span Temperature Shift
Offset Temperature Shift
Accuracy
Offset Position Sensitivity (±1g)
Offset Long Term Drift (one year)
Pressure Digital Resolution - No Missing Codes
16-bit Option
17-bit Option
18-bit Option
Temperature Output
Resolution
Overall Accuracy
Supply Current Requirement
During Active State (ICC
Active
)
During Idle State (ICC
Idle
)
Power On Delay
Memory Read Access Time
Data Update Time (t
DU
)
Minimum
-
-
-
-
Typical
±0.4 * 2
24
0.8 * 2
24
Maximum
-
-
-
-
Units
Dec Count
Dec Count
Dec Count
Dec Count
Specification
Notes
1
1
-
-
0.5 * 2
24
0.1 * 2
24
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
15.7
16.7
17.7
-
-
-
-
-
30
±0.10
±6
±9
±0.03
±0.06
±7
±3
±0.03
±0.10
±10
±4
±0.03
±0.05
±6
±3
±0.03
±0.10
±0.25
-
-
-
16
2
2
100
-
-
±0.25
-
-
±0.10
±0.20
-
-
±0.10
±0.35
-
-
±0.10
±0.15
-
-
±0.10
-
-
-
-
-
-
-
2.6
250
2.5
-
%FSS
ppmFSS/C
ppmFSS/C
%FSS
%FSS
ppmFSS/C
ppmFSS/C
%FSS
%FSS
ppmFSS/C
ppmFSS/C
%FSS
%FSS
ppmFSS/C
ppmFSS/C
%FSS
%FSS
%FSS
bit
bit
bit
bit
°C
mA
nA
ms
ms
2, 6
4, 6
4, 6
3, 6
2, 6
4, 6
4, 6
3, 6
2, 6
4, 6
4, 6
3, 6
2, 6
4, 6
4, 6
3, 6
-
-
-
-
-
-
-
5, 7, 8
-
-
5
10
5, 7
(see table below)
DLLR Series High Accuracy Digital Pressure Sensors
Table of Contents
Page 3
I2C / SPI Electrical Parameters for DLLR
Parameter
Input High Level
Input Low Level
Output Low Level
I2C Pull-up Resistor
Symbol
-
-
-
-
C
SDA
C
I2C_IN
Min
80.0
0
-
1000
-
-
Typ
-
-
-
-
-
-
Max
100
20.0
10.0
-
200
10.0
Units
% of Vs
% of Vs
% of Vs
Ω
pF
pF
Notes
5
5
5
5
5
5
I2C Load Capacitance on SDA, @ 400 kHz
I2C Input Capacitance (each pin)
Pressure Output Transfer Function
Where:
Is the specified digital offset
For Gage Operating Range sensors:
For Differential Operating Range sensors:
The sensor Full Scale Span in inches H
2
O
For Gage Operating Range sensors:
For Differential Operating Range sensors:
Full Scale Pressure
2 x Full Scale Pressure
0.1 * 2
24
0.5 * 2
24
Where:
½½½½
½½½
½½½½½½½½½½½ ½½½ ½ ½
The sensor 24‐bit digital temperature output.
(Note that only the upper 16 bits are significant)
Specification Notes
note
1: tHe SPAn IS tHe ALGeBRAIC DIFFeRenCe BetWeen FULL SCALe DeCIMAL CoUntS AnD tHe oFFSet DeCIMAL CoUntS. tHe FULL SCALe PReSSURe IS tHe
MAXIMUM PoSItIVe CALIBRAteD PReSSURe.
2: totAL eRRoR BAnD ConSIStS oF oFFSet AnD SPAn teMPeRAtURe AnD CALIBRAtIon eRRoRS, LIneARItY AnD PReSSURe HYSteReSIS eRRoRS, oFFSet
WARM-UP SHIFt, oFFSet PoSItIon SenSItIVItY AnD LonG teRM oFFSet DRIFt eRRoRS.
3: ACCURACY InCLUDeS PReSSURe HYSteReSIS, RePeAtABILItY AnD BeSt-FIt StRAIGHt LIne LIneARItY, eVALUAteD At 25C.
4: PARtS PeR MILLIon oF FULL-SCALe SPAn PeR DeGRee C.
5: PARAMeteR IS CHARACteRIZeD AnD not 100% teSteD.
6: eVALUAteD FoLLoWInG CoRReCtIonS DeSCRIBeD In eXtenDeD CoMPenSAtIon SeCtIon.
7: DAtA UPDAte tIMe IS eXCLUSIVe oF CoMMUnICAtIonS, FRoM CoMMAnD ReCeIVeD to enD oF BUSY StAtUS. tHIS CAn Be oBSeRVeD AS eoC PIn
LoW- StAte DURAtIon.
8: AVeRAGe CURRent CAn Be eStIMAteD AS : ICC
Idle
+ (t
DU
/ R
eADInG
I
nteRVAL
) * ICCA
CtIVe
).
REFER TO FIGURE 2 FOR ACTIVE AND IDLE CONDITIONS OF THE
SENSOR (THE ACTIVE STATE IS WHILE EOC PIN IS LOW).
9:
THE SENSOR IS CALIBRATED WITH A 3.3V SUPPLY HOWEVER, AN INTERNAL REGULATOR ALLOWS A SUPPLY VOLTAGE OF 1.68V TO 3.6V TO BE USED
WITHOUT AFFECTING THE OVERALL SPECIFICATIONS. THIS ALLOWS DIRECT OPERATION FROM A BATTERY SUPPLY.
10
:
DELAY BETWEEN END OF MEMORY READ REQUEST COMMUNICATION AND START OF MEMORY DATA READ COMMUNICATION.
note
note
note
note
note
note
note
note
note
All Sensors
DS-0358 Rev A
Table of Contents
Page 4
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Temperature Output Transfer Function
½½½½
½½½
∗ 125
½ ½ ½½
2
½½
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2
)
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(
2
)
= 1.25 ×
½
−
½
×
(
2
)
2
24
Is the sensor 24-bit digital output, following corrections applied by extended
compensation.
all sensors
Device Ordering Options
Output Resolution
Calibrated output resolution can be ordered to be 16, 17, or 18 bits.
Higher resolution results in slower update times; see the Data Update Time in the Performance Characteristics table.
DLLR Series High Accuracy Digital Pressure Sensors
Table of Contents
Page 5
