DLVR-L05x datasheet, PDF - EEWORLD Datasheet

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DLVR-L05x: CategoryThe sensor; File Size2MB，18 Pages; ManufacturerAll Sensors

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Product Category	Board Mount Pressure Sensors
Manufacturer	All Sensors

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Signed Original On File

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DLVR Series Low Voltage Digital Pressure Sensors

Features

• 0.5 to 60 inH2O Pressure Ranges

• 3.3V Supply Voltage Standard / 5V Option

• I2C Standard Interface / SPI Interface Option

• Better than 1.0% Accuracy Over Temperature Typical

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Applications

• Medical Breathing

• Environmental Controls

• HVAC

• Industrial Controls

• Portable/Hand-Held Equipment

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Signed Original On File

all sensors

408 225 2079

www.allsensors.com

408 225 4314

16035 Vineyard Blvd. Morgan Hill, CA 95037

General Description

Signed Original On File

The DLVR 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. The technology also vastly improves position sensitivity

compared to single die devices.

The supply voltage options ease integration of the sensors into a wide range of process control and measurement sys-

tems, allowing direct connection to serial communications channels. For battery-powered systems, the sensors can enter

very low-power modes 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 and the like. A protective parylene

coating is optionally available for moisture/harsh media protection.

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Standard Pressure Ranges

Device

DLVR-F50D

DLVR-L01D

DLVR-L02D

Operating Range

±0.5 inH2O

±1 inH2O

±2 inH2O

±5 inH2O

±10 inH2O

±20 inH2O

±30 inH2O

±60 inH2O

0 to 1 inH2O

0 to 2 inH2O

0 to 5 inH2O

0 to 10 inH2O

0 to 20 inH2O

0 to 30 inH2O

0 to 60 inH2O

Proof Pressure

100 inH2O

200 inH2O

100 inH2O

200 inH2O

Burst Pressure

300 inH2O

500 inH2O

800 inH2O

300 inH2O

500 inH2O

800 inH2O

Nominal Span

±6,553 counts

13,107 counts

Equivalent Circuit

SCL

I2C

SDA

INT

Gnd

SPI

Option

SCLK

MISO

Gnd

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Signed Original On File

DLVR-L05D

DLVR-L10D

DLVR-L20D

DLVR-L30D

DLVR-L60D

DLVR-L01G

DLVR-L02G

DLVR-L05G

DLVR-L10G

DLVR-L20G

DLVR-L30G

DLVR-L60G

Signed Original On File

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Pressure Sensor Maximum Ratings

Supply Voltage (Vs)

Common Mode Pressure

6 Vdc

10 psig

270 °C

Environmental Specifications

Temperature Ranges

Compensated:

Operating

Storage

Humidity Limits (non condensing)

Commercial

Industrial

0°C

to 70°C

-20°C

to 85°C

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Original On File

Lead Temperature (soldering 2-4 sec.)

-25°C to 85 °C

-40°C to 125 °C

0 to 95% RH

Signed Original O

All Sensors

DS-0300 Rev D

Page 1

ors.com

Signed Original On File

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Signed Original On F

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Device Options

The following is a list of factory programmable options. Consult the factory to learn more about the options.

Interface

I2C and SPI interfaces are available. NOTE: SPI interface is only available with eight (8) lead packages.

Supply Voltage

Devices are characterized at either 3.3V or 5.0V depending on the options selected. It is suggested to select

the option that most closely matches the application supply voltage for best possible performance.

Signed Original On File

Speed/Power

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There are four options of Speed/Power. These are Fast(F), Noise Reduced(N), Low Power(L) and Sleep mode(S).

Signed Original On File

Fast Mode(F)

Is the fastest operating mode where the device operates with continuous sampling at the

fastest internal speed.

Noise Reduced(N):

Also operates with continuous samples however the ADC is set for over sampling

for noise reduction. The conversion times are resultantly longer than the Fast(F) mode however, there is

approximately 1/2 bit reduction in noise.

Low Power(L): Is similar to the Fast(F) mode with exception that the device uses an internal timer to

delay between pressure conversions. The internal timer time-out triggers the next conversion cycle. The

update rate is commensurately lower for this mode as a result.

Sleep(S):

Is similar to the Low Power(L) mode however the trigger to initiate a sample comes from the

user instead of an internal timer. This is ideal for very low update rate applications that requirelow

power usage. It is also ideal for synchronizing the data conversions with the host microprocessor.

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Coating

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Signed Original On File

Parylene Coating: Parylene coating provides a moisture barrier and protection form some harsh media. Con-

sult factory for applicability of Parylene for the target application and sensor type.

Signed Original On File

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Original On File

Signed Original O

DLVR Series Low Voltage Digital Pressure Sensors

Page 4

ors.com

Signed Original On File

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Signed Original On F

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Operation Overview

The DLVR is a digital sensor with a signal path that includes a sensing element, a 14 bit analog to digital converter, a DSP and

an IO block that supports either an I2C or SPI interface (see Figure 1 below). The sensor also includes an internal temperature

reference and associated control logic to support the configured operating mode. The sensing element is powered down

while not being sampled to conserve power. Since there is a single ADC, there is also a multiplexer at the front end of the

ADC that selects the signal source for the ADC.

Figure 1 - DLVR Essential Model

Signed Original On File

all sensors

408 225 2079

www.allsensors.com

408 225 4314

16035 Vineyard Blvd. Morgan Hill, CA 95037

Zero

Sensor

Sample

rawP/

rawT

Over

Sample

Enable

Pressure

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DSP

Temperature

I/O

I2C/SPI

Signed Original On File

P/T/Z

Select

Control

Logic

Wake

Gnd

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The ADC performs conversions on the raw sensor signal (P), the temperature reference (T) and a zero reference (Z) during an

ADC zero cycle. It also has an oversampling mode for a noise reduced output. A conversion cycle that is measuring pressure

is called a Normal cycle. A cycle where either a temperature measurement or zeroing is being performed is called a Special

cycle.

The DSP receives the converted pressure and temperature information and applies a multi-order transfer function to com-

pensate the pressure output. This transfer function includes compensation for span, offset, temperature effects on span, tem-

perature effects on offset and second order temperature effects on both span and offset. There is also linearity compensation

for gage devices and front to back linearity compensation for differential devices.

There are two effective operating modes of the sensor 1) Free Running and 2) Triggered. The control logic performs the

synchronization of the internal functions according the factory programmed Power/Speed option (see Table 1). The Control

Logic also determines the Delay between ADC samples, the regularity of the Special cycles and whether or not the ADC per-

forms the Over Sampling. Refer to Figure 2 for the communication model associated with the operating modes listed below.

Free Running Mode:

In the free running mode, conversion cycles are initiated internally at regular intervals. There are

three options available that operate in the Free Running mode (F, N and L). Two of these (F and N) run continuously while

the third option (L) has an approximate 6 ms delay between conversion cycles. All three options have Special cycles

inserted at regular intervals to accomplish the ADC zeroing and temperature measurements. Two of the options utilize

oversampling. Refer to Table 1 for specific option controls.

Triggered Mode:

In the Triggered Mode, a conversion cycle is initiated by the user (or host uP). There are two available

methods to wake the sensor from sleep mode. The first method (Wake All) is to wake the sensor and perform all three

measurement cycles (Z, T and P). This provides completely fresh data from the sensor. The second method (Wake P) is

to wake the sensor from sleep and only perform the pressure measurement (P).When using this second method, it is up

to the user to interleave Wake All commands at regular intervals to ensure there is sufficiently up to date temperature

information. Also, the Wake Pressure method is only available from the I2C interface (not available using a SPI interface).

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Signed Original On File

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Original On File

Signed Original O

All Sensors

DS-0300 Rev D

Page 5

ors.com

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