The ASDX Series is a Silicon Pressure Sensor offering either
2
an I C or SPI digital interface for reading pressure over the
specified full scale pressure span and temperature range.
The ASDX is fully calibrated and temperature compensated for
sensor offset, sensitivity, temperature effects and non-linearity
using an on-board Application Specific Integrated Circuit
(ASIC). Calibrated output values for pressure are updated at
approximately 1 kHz.
The standard ASDX is calibrated over the temperature range
of 0 °C to 85 °C [32 °F to 185 °F]. The sensor is characterized
for operation from a single power supply of either 3.3 Vdc or
5.0 Vdc.
FEATURES
2
Output options: I C- or SPI-compatible 12-bit digital
Precision ASIC conditioning and temperature
compensated over 0 °C to 85 °C [32 °F to 185 °F]
temperature range
Low operating voltage
Absolute, differential and gage types
Pressure ranges from 10 inches H
2
O to 100 psi
Standard calibrations in inches H
2
O, cm H
2
0, psi, mbar,
bar, kPa
Total error band of ±2.0% of full scale span maximum
RoHS compliant
These sensors are available to measure absolute, differential
and gage pressures. The absolute versions have an internal
vacuum reference and an output value proportional to absolute
pressure. Differential versions allow application of pressure to
either side of the sensing diaphragm. Gage versions are
referenced to atmospheric pressure and provide an output
proportional to pressure variations from atmosphere.
The ASDX Series sensors are intended for use with non-
corrosive, non-ionic working fluids such as air and dry gases.
They are designed and manufactured according to standards
in ISO 9001.
POTENTIAL APPLICATIONS
Flow calibrators
Ventilation and air flow monitors
Gas flow instrumentation
Sleep apnea monitoring and therapy equipment
Barometry
Pneumatic controls
HVAC
ASDX Series Silicon Pressure Sensors
Table 1. Absolute Maximum Ratings
Parameter
Supply voltage (V
supply
)
Voltage to any pin
Digital clock frequency:
2
IC
SPI
ESD susceptibility (human body model)
Storage temperature
Lead temperature (2 s to 4 s)
2
External capacitance between V
supply
and ground
Table 2. Operating Specifications
Parameter
3
Supply voltage: (V
supply
)
3.3 Vdc
5.0 Vdc
Sensors are either 3.3 Vdc or 5.0 Vdc per the Order Guide (see Figure 1).
1
Min
-0.3
-0.3
100
50
3
-50 [-58]
-
100
Max
6.0
V
supply
+ 0.3
400
800
-
125 [257]
250 [482]
470
Unit
Vdc
Vdc
kHz
kV
°C [°F]
°C [°F]
nF
Min.
3.0
4.75
2.0
0 [32]
-20 [-4]
Typ.
3.3
4
5.0
4
Max.
3.6
5.25
Unit
Vdc
mA
°C [°F]
°C [°F]
Supply current
5
Compensated temperature range
6
Operating temperature range
7
Overpressure
8
Burst pressure
Startup time (power up to data ready)
Response time
2
I C or SPI voltage level low
2
I C or SPI voltage level high
2
Pull-up on SDA and SCL (I C output only)
9
Total error band
Output resolution
Table 3. Environmental Specifications
Parameter
Humidity
Vibration
Shock
Life
Table 4. Wetted Materials
Parameter
Covers
Adhesives
Electronic components
11
-
-
-
0.8
1
-
12
3.5
5.0
-
85 [185]
-
105 [221]
2X operating pressure range minimum
3X operating pressure range minimum
2.8
7.3
0.46
-
-
0.2
-
-
-
-
-
2.0
-
-
ms
ms
V
supply
V
supply
kOhm
10
%FSS
bits
Characteristic
0% to 95% RH non-condensing
10 G at 20 Hz to 2000 Hz
100 G for 11 ms
1 million cycles minimum
Port 1 (Pressure Port)
glass-filled PBT
silicone
silicon and glass
12
Port 2 (Reference Port)
glass-filled PBT
silicone and epoxy
silicon, glass, and gold
12
Notes:
1. Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device.
2. An external bypass capacitor is
required
across the supply voltage (Pins 6 and 3 – see Figure 4) as close to the sensor supply pin as possible
for correct sensor operation.
3. Ratiometricity of the sensor (the ability of the output to scale to the input voltage) is achieved within the specified operating voltage for each
option. Other custom supply voltages are available, please contact Honeywell Customer Service.
4. The sensor is not reverse polarity protected. Incorrect application of excitation voltage or ground to the wrong pin may cause electrical failure.
5. The compensated temperature range is the temperature range (or ranges) over which the sensor will produce an output proportional to
pressure within the specified performance limits.
6. The operating temperature range is the temperature range over which the sensor will produce an output proportional to pressure but may not
remain within the specified performance limits.
7. Overpressure is the maximum pressure which may safely be applied to the product for it to remain in specification once pressure is returned to
the operating pressure range. Exposure to higher pressures may cause permanent damage to the product.
8. Burst pressure is the maximum pressure that may be applied to any port of the product without causing escape of pressure media. Product
should not be expected to function after exposure to any pressure beyond the burst pressure.
9. Total error band is the maximum deviation in output from ideal transfer function over the entire compensated temperature and pressure range.
Includes all errors due to offset, full scale span, pressure non-linearity, pressure hysteresis, repeatability, thermal effect on offset, thermal effect
on span and thermal hysteresis. Specification units are in percent of full scale span (%FSS).
10. Full scale span (FSS) is the algebraic difference between the output signal measured at the maximum (Pmax.) and minimum (Pmin.) limits of
the pressure range.
11. Consult Honeywell Customer Service for detailed material information.
12. For AC pressure port configuration, the “pressure” and “reference” ports are reversed.
2
sensing.honeywell.com
Figure 1. Nomenclature and Order Guide
Package Selection
13
Calibration Selection
ASDX
Series
__
X _____
_
_
_
Power Supply Voltage
3
= 3.3 Vdc
5
= 5.0 Vdc
Pressure Port
AV
= Axial port on top, vented cover on bottom
Transfer Function Limits
14
A
= 10% to 90% calibration
B
= 5% to 95% calibration
Output Type
15
S
= SPI
2
2
= I C, Address 0x28
2
3
= I C, Address 0x38
4
= I C, Address 0x48
5
= I C, Address 0x58
RR
= Radial port on top, radial port on bottom
6
= I C, Address 0x68
7
= I C, Address 0x78
2
2
2
2
Pressure Range
16, 17, 18
Gage
-
010NG
= 10 in H
2
O
AC
= Axial port, sealed cover (commonly used
for absolute)
-
025CG
= 25 cm H
2
O
001PG
= 1 psi
005PG
= 5 psi
015PG
= 15 psi
030PG
= 30 psi
100PG
= 100 psi
-
025MG
= 25 mbar
050MG
= 50 mbar
100MG
= 100 mbar
200MG
= 200 mbar
500MG
= 500 mbar
001BG
= 1 bar
002BG
= 2 bar
007BG
= 7 bar
003KG
= 3 kPa
004KG
= 4 kPa
005KG
= 5 kPa
010KG
= 10 kPa
020KG
= 20 kPa
050KG
= 50 kPa
100KG
= 100 kPa
200KG
= 200 kPa
700KG
= 700 kPa
Differential
005ND =
±5 in H
2
O
010ND =
±10 in H
2
O
015CD =
±15 cm H
2
O
025CD =
±25 cm H
2
O
001PD
= ±1 psi
005PD
= ±5 psi
015PD
= ±15 psi
030PD
= ±30 psi
-
015MD
= ±15 mbar
025MD
= ±25 mbar
050MD
= ±50 mbar
100MD
= ±100 mbar
200MD
= ±200 mbar
500MD
= ±500 mbar
001BD
= ±1 bar
002BD
= ±2 bar
-
003KD
= ±3 kPa
004KD
= ±4 kPa
005KD
= ±5 kPa
010KD
= ±10 kPa
020KD
= ±20 kPa
050KD
= ±50 kPa
100KD
= ±100 kPa
200KD
= ±200 kPa
-
-
-
-
-
-
-
015PA
= 15 psi
030PA
= 30 psi
100PA
= 100 psi
-
-
-
-
-
-
001BA
= 1 bar
002BA
= 2 bar
007BA
= 7 bar
-
-
-
-
-
-
100KA
= 100 kPa
200KA
= 200 kPa
700KA
= 700 kPa
Absolute
RV
= Radial port, single
Future Option
Notes:
13. Other package combinations are possible, please contact Honeywell Customer Service.
14. The transfer function limits define the output of the sensor at a given pressure input. By specifying the output signal at the maximum (Pmax.)
and minimum (Pmin.) limits of the pressure range, the complete transfer curve for the sensor is defined. See Figure 2 for a graphical
representation of each calibration. For the 12-bit digital output, Table 6 provides the output of the sensor at significant percentages. These
outputs are valid at the rated input voltage of the sensor.
15. The output type defines which communication protocol the sensor uses to communicate. Available protocols are I
2
C or half duplex SPI (sensor
acts only as a slave). This communication protocol is not field selectable, and must be defined when ordering the sensor.
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