DSDX100G2R [SENSORTECHNICS]

Digital pressure transducers; 数字压力传感器


型号：	DSDX100G2R
厂家：	SENSORTECHNICS GMBH
描述：	Digital pressure transducers 数字压力传感器传感器压力传感器
文件：	总8页 (文件大小：83K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DSDX Series

Digital pressure transducers

FEATURES

GENERAL DESCRIPTION

· 0...1 to 0...100 psi,

0...±1 to 0...±100 psi

The DSDX series offers a digital

interface on a very cost-effective basis.

This family is fully calibrated and

temperature compen-sated using an

on-board ASIC. These sensors are

intended for use with non-corrosive,

non-ionic working fluids such as air

and dry gases.

· Absolute, gage or

differential pressure

· Digital readout via I²C-bus

· Precision ASIC conditioning

· Temperature compensated

· Non-ratiometric output

Devices are available to measure

absolute, differential, and gage

pressures from 1 to 100 psi. The

absolute devices have an internal

vacuum reference and an output

signal proportional to absolute

pressure. Differential devices allow

application of pressure to either side

of the sensing diaphragm and can be

used for gage or differential

measurements.

APPLICATIONS

All DSDX devices are accurate to with-

in ±2.0 %FSS for all gage and

absolute devices. The devices are

characterized for operation from a

single 5 V supply. The sensor is de-

signed and manufactured according

to standards laid down in ISO 9001.

· Medical instrumentation

· Barometry

· HVAC controls

· Pneumatic controls

ELECTRICAL CONNECTION

+Vs

N/C

Note: A capacitor of 220 nF is required

between +Vs and GND.

Pin 2 is an internal device connection and

should be connected to ground with a

15 nF capacitor.

SCL

SDA

220 nF

DSDX

It is important to place the capacitors as

close to the pins aspossible!

Pins 4, 6 and 8 are internal device

connections and should not be

connected for any reason!

15 nF

8 4

N/C

GND

February 2009 / 545

1/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

PRESSURE SENSOR CHARACTERISTICS

Maximum ratings

Environmental specifications

Supply voltage V_S

4.75 to 5.25 V_DC

max. 6.50 V_DC

Temperature ranges

Compensated

Operating

0 to +85°C

-20 to +105°C

-40 to +125°C

Storage

Lead temperature (2 - 4 sec.)

250°C

Vibration:

Shock:

10 g at 20 - 2000 Hz

100 g for 11 ms

Caution! The sensor is not reverse polarity protected.

Incorrect applications of excitation voltage or ground to the wrong pin can cause electrical failure.

Application of supply voltage above the maximum can cause electrical failure.

PRESSURE RANGES SPECIFICATIONS

(V_S= 5.0 V_DC, T_A= 25°C)

Part number

DSDX015A2R

Pressure range

Burst pressure¹

Sensitivity (typ.)

0 to 15

218

109

DSDX030A2R

0 to 30

0 to 100

0 to 1

psi(a)

150

psi(a)

DSDX100A2R

DSDX001G2R / D4R

DSDX005G2R / D4R

DSDX015G2R / D4R

DSDX030G2R / D4R

DSDX100G2R / D4R

DSDX001D4D

3277

655

218

0 to 5

150

0 to 15

0 to 30

0 to 100

0 to ±1

0 to ±5

0 to ±15

0 to ±30

0 to ±100

counts/

109

psi

1638

328

109

psi(g,d)

DSDX005D4D

150

DSDX015D4D

DSDX030D4D

DSDX100D4D

February 2009 / 545

2/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

PERFORMANCE CHARACTERISTICS

The output signal is not ratiometric to the supply voltage (V_S= 5.0 V_DC, T_A= 25°C)

All DSDX...R

Characteristics

Min.

Typ.

410

Max.

Unit

Zero pressure offset

347

473

Full scale span (FSS)²

3276

3686

counts

Full scale output

3624

3750

±2.0

Total accuracy (0 to 85°C)³

Sample rate

%FSS

100

Response delay⁴

2.73

14.11

Startup time (power up to 1st result)

Quantization step⁵

counts

Current consumption

All DSDX...D

Characteristics

Zero pressure offset

Min.

Typ.

2048

3276

3686

410

Max.

Unit

1985

2111

Full scale span (FSS)²

counts

Output

at max. specified pressure

at min. specified pressure

3624

347

3750

473

Total accuracy (0 to 85°C)³

Sample rate

±2.0

%FSS

100

Response delay⁴

2.73

14.11

Startup time (power up to 1st result)

Quantization step⁵

counts

Current consumption

February 2009 / 545

3/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

TOTAL ACCURACY (-20 TO +105°C)

3.0

2.0

1.0

-1.0

-2.0

-3.0

-20

105

Temperature (°C)

Specification notes:

1. If maximum burst pressure is exceeded, even momentarily, the package may leak or burst, or the pressure sensing die may

fracture.

2. Span is the algebraic difference between the output signal for the highest and lowest specified pressure.

3. Total accuracy is the combined error from offset and span calibration, linearity, pressure hysteresis, and temperature

effects. Linearity is the measured deviation based on a straight line. Hysteresis is the maximum output difference at

any point within the operating pressure range for increasing and decreasing pressure. Calibration errors include the

deviation of offset and full scale from nominal values.

4. Delay time between sampling and signal change at the output.

5. The smallest change in the output voltage, given any change in pressure.

February 2009 / 545

4/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

INTRODUCTION

The DSDX is capable to generate a digital output signal. It

runs a cyclic program, which will store a corrected 12-bit

sensor value about every 10 ms within the output registers

of the internal ASIC. In order to use the pressure transducer

for digital signal readout, the device should be connected

to a bidirectional I²C-bus.

STOP condition (P): LOW to HIGH transition of SDA line while

clock (SCL) is HIGH determines STOP condition. STOP

conditions are always generated by the master. More than

one request for the current pressure value can be trans-

mitted without generation of intermediate STOP condition.

DATA valid (D): State of data line represents valid data when,

after START condition, data line is stable for duration of

HIGH period of clock signal. Data on line must be

changed during LOW period of clock signal. There is

one clock pulse per bit of data.

According to the I²C-bus communication specification, the

bus is controlled by a master device, which generates the

clock signal, controls the bus access and generates START

and STOP conditions. The DSDX is designed to work as a

slave, hence it will only respond to requests from a master

device.

Acknowledge (A): Data is transferred in pieces of 8 bits

(1 byte) on serial bus, MSB first. After each byte receiving

device – whether master or slave – is obliged to pull

data line LOW as acknowledge for reception of data.

Master must generate an extra clock pulse for this pur-

pose. When acknowledge is missed, slave transmitter

becomes inactive. It is on master either to send last com-

mand again or to generate STOP condition in that case.

The I²C-bus master-slave concept requires a unique

address for each device. The DSDX has a hard coded slave

address (1111000xb), therefore it is not possible to access

more than one DSDX on the same I²C-bus line.

DIGITAL I²C INTERFACE

Slave address: Each device connected to the bus has a

unique slave address. After generating a START con-

dition, the master has to transmit the slave address for

the DSDX with a READ command: $F1. The DSDX must

not be accessed with a WRITE command ($F0) as the

correct function of the device can not be guaranteed in

this case (note: a power-down power-up change will

force the sensor to use factory data again).

The DSDX complies with the following protocol (FIGURE I):

Bus not busy: During idle periods both data line (SDA) and

clock line (SCL) remain HIGH.

START condition (S): HIGH to LOW transition of SDA line

while clock (SCL) is HIGH is interpreted as START con-

dition. START conditions are always generated by the

master. Each request for the current pressure value must

be initiated with a START.

DATAoperation:TheDSDXstartstosend2databytescontaining

the current pressure value placed in the output registers.

SCL

SDA

START

condition

Data

valid

Data allowed

to change

STOP

condition

S Slave Address

Data Byte 1

R/W A

Data Byte 2

Slave Address

Read out of pressure value

Next command

S = START condition

A = Acknowledge

Data Byte 1 = High Byte (MSB first)

Data Byte 2 = Low Byte (LSB last)

generated by master

generated by slave

P = STOP condition

FIGURE I: I²C-BUS Protocol of DSDX

February 2009 / 545

5/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

I²C INTERFACE PARAMETERS

Parameter

Input high level

Symbol

Conditions

Min.

Typ.

Max.

100

Unit

% of

Input low level

Output low level

(open drain, IOL = -4 mA)

(pins SCL and SDA)

Pull up current

µA

Load capacitance SDA

SCL clock frequency

400

100

F_SCL

t_BUF

---

kHz

Bus free time between

STOP and START condition

Hold time (repeated)

START condition

4.7

µs

t_HD.STA

to first clock pulse

4.0

t_LOW

t_HIGH

LOW period of SCL

HIGH period of SCL

4.7

4.0

µs

Setup time repeated

START condition

t_SU.STA

4.7

µs

t_HD.DAT

t_SU.DAT

Data hold time

Data setup time

250

Rise time of both

SDA and SCL

Fall time of both

SDA and SCL

Setup time for

STOP condition

t_R

t_F

---

300

µs

t_SU.STO

t_SP

Input filter spike

suppression

spikes on SDA or SCL of

that length are suppressed

tSU;DAT

tHD;DAT

tSU;STA

tHD;STA

SCL

SDA

tHIGH

tLOW

tSU;STO

tBUF

tHD;STA

SCL

SDA

FIGURE II: Timing characteristics of the I²C interface

February 2009 / 545

6/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

PHYSICAL DIMENSIONS

D4 package

1.27 typ

(0.050 typ)

16.89

(0.665)

7.87 typ

(0.310 typ)

13.97

(0.550)

High pressure port

Low pressure port

3.63

(0.143)

2.29

(0.090)

3.38

(0.133)

8.13

(0.320)

8.89

(0.350)

8.26 typ

(.325 typ)

0.51 typ

1.78

(0.070)

(0.02 typ)

2.54 typ

(0.100 typ)

16.64 ±0.64

(0.655 ±0.025)

4.5

(0.177)

6.99

(0.275)

G2 package

3.15

(0.124)

16.89

(0.665)

1.27 typ

(0.050 typ)

13.97

(0.550)

4.9

(0.193)

1.19 typ

(0.047 typ)

2.29 typ

2 ° typ

(0.090 typ)

2.79 typ

(0.11 typ)

8.89

(0.350)

5.08

(0.200)

0.51 typ

(0.02 typ)

16.64 ±0.64

2.54 typ

(0.100 typ)

(0.655 ± 0.025)

4.5

(0.177)

A2 package

16.89

(0.665)

1.27 typ

(0.050 typ)

8.46

(0.333)

13.97

(0.550)

2.29 typ

(0.090 typ)

8.0 typ

(0.315 typ)

8.89

(0.350)

0.51 typ

(0.02 typ)

2.54 typ

(0.100 typ)

16.64 ±0.64

(0.655 ±0.025)

4.5

(0.177)

third angle projection

dimensions in mm (inches)

February 2009 / 545

7/8

www.sensortechnics.com

DSDX Series

Digital pressure transducers

ELECTRICAL CONNECTIONS

DSDX...D4...

DSDX...G2R

Vs (pin 1)

identifier

Vs (pin 1)

identifier

+Vs

GND

N/C

SCL

N/C

SDA

N/C

+Vs

GND

N/C

SCL

N/C

SDA

N/C

DSDX...A2R

Vs (pin 1)

identifier

Note: Pins 4, 6 and 8 are internal device

connections and should not be

connected for any reason.

SCL

N/C

SDA

N/C

+Vs

GND

N/C

Pin 2 is an internal device connection

and should be connected to ground

with a 15 nF capacitor.

ORDERING INFORMATION

Pressure range

0 to 1 psi

Absolute

Gage

Differential/Gage

DSDX001G2R

DSDX005G2R

DSDX015G2R

DSDX030G2R

DSDX100G2R

DSDX001D4R

DSDX005D4R

DSDX015D4R

DSDX030D4R

DSDX100D4R

DSDX001D4D

DSDX005D4D

DSDX015D4D

DSDX030D4D

DSDX100D4D

0 to 5 psi

0 to 15 psi

0 to 30 psi

0 to 100 psi

0 to ±1 psi

0 to ±5 psi

0 to ±15 psi

0 to ±30 psi

0 to ±100 psi

DSDX015A2R

DSDX030A2R

DSDX100A2R

Other pressure ranges or calibrations are available on request

Sensortechnics reserves the right to make changes to any products herein. Sensortechnics 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.

February 2009 / 545

8/8

www.sensortechnics.com

DSDX100G2R [SENSORTECHNICS]

相关型号：

SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E