8.9
8.1.-
8.2. ,
8.3.
8.4.
8.5. MicroConverter
-
, , (SPI QSPI MICROWIRE NationalSemiconductor), , AD7816/7817/7818. - AD7816, AD7817, AD7818 . 2.38, . 2.39, . 2.40.
2.5 |
10- |
> |
REF |
IN |
+ |
V |
DD |
2.7 |
= |
5.5 |
D |
IN/OUT |
SCLK |
OTI |
RD/WR |
AGND |
CONVST |
AD7816 |
. 2.38. 10- (AD7816)
2.5 |
10- |
> |
REF |
IN |
+ |
V |
DD |
= 2.7 |
5.5 |
D |
OUT |
SCLK |
OTI |
RD/WR |
DGND |
CONVST |
AD7817 |
D |
IN |
CS |
AGND |
BUSY |
V |
IN1 |
V |
IN2 |
V |
IN3 |
V |
IN4 |
. 2.39. 10-
(AD7817)
2.5 |
10- |
> |
+ |
V |
DD |
= 2.7 |
5.5 |
D |
IN/OUT |
SCLK |
OTI |
RD/WR |
CONVST |
AD7818 |
AGND |
V |
IN1 |
. 2.40. 10-
(AD7818)
10- 10 ; (Intel 8051, SPI, QSPI, MICROWIRE);
55 +125 ; +2 ( 40 +85 ); 2.5 1 %; (+2.7 +5.5 ); 4 10 ; ; ; , AD7817, AD7818;
|
|
AD7416/AD7417/AD7418 , 12 [ 16 ].
,
. : 420 , 1-Ware, CAN, I2C, Ehternet, Lonwork .
. .
. 2.41 , . , , AD420. , AD420. , . , 4 ( ), ( ) 20 . , 4 [ 15 ].
. 2.41. 420
, 12 36 . , , . RSENSE, AD420. AD420 16- - . .
. 2.42 420 . , 4 . AD421, 16- , . 420, , AD421 , RSENSE. , , , . - AD7714/AD7715. , , , 4 . AD421 , 3, 3.3 5 . , [ 15 ].
|
|
. 2.42. , 420
. 2.43.
HART, AD421 420
HART (ll202), , . 420 , . 1 0 1200 2200 . , , . .
420 , , . . , 420 ( ). , , HART, ( ) () . 10 0.01 % . HART , ( ) , ( , , ) . . . 2.43 - - . - , , , . , HART, - [ 16 ].
, HART- , . 2.43, . HART- AD421. , BELL202, , SymbiosLogic, Inc 2015 SMAR ResearchCorporation 2012.
. , , (SOC), . . (. 2.44).
|
|
. 2.44.
. . 2.44 , Ethernet Lonwork. . ( ASI-bus, CAN-bus HART), , , .
, , . . , , , .
Ethernet CAN-Bus
Foundation Fieldbus Device-Net
Lonwork World FIP
Profibus P-NET
Interbus-S HART
Universal Serial Bus (USB) ASI
, () ( ), . IEEE 1451.2 , , .
. 2.45 , IEEE 1451.2. ( ) STIM (SmartTransducerInterfaceModule) ( ). / , / . , TEDS (TransducerElectronicDataSheet) ( ), / . NCAP (NetworkCapableApplicationProcessor) ( ) , STIM.
. 2.45. IEEE1451.2
Ethernet |
NCAP |
Ethernet |
NCAP |
STIM |
STIM |
- |
Ethernet |
Lonwork |
NCAP |
Lonwork |
NCAP |
STIM |
Lonwork |
|
|
. 2.46. , plug&play
IEEE1451.2 10- , (TransducerIndependentInterface) (
). () STIM NCAP , . 2.46. STIM NCAP, , TEDS, . , , ( , , . .), (, 2 ), , . , , .
( 1451.2) :
, , , .
8.5. MicroConverter
MicroConverter AnalogDevices , (. 2.7).
2.7
AnalogDevices
ADuC816 | ADuC812 | AduC810 |
ZA > 1 6 / (-) > 100 . | 8- 12 , 5 < 1/2 INL | 8- 10 < 1/2 INL |
12- < 1/2 DNL | 12- < 1/2 DNL | 12- < 1/2 DNL |
MicroConverter: - , (FLASH EEPROM) . 12- , .
2
1. , .
2. .
3. ().
4. .
5. .
6. , .
7. .
8. .