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AD7792

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ADIዐ࿔Ӳຕ๮֩๟ᆈ࿔Ӳຕ๮֩ڦᅳ࿔ǈ৤൩ଌ঴݋ᅳዐీ٪ሞڦᇕჾፇኯ݋ᅳٱဃǈADIփܔ݋ᅳዐ٪ሞڦֶᅴᆯׂُิڦٱဃ޶ሴăසႴඓණඪࢆَᇕڦጚඓႠǈ൩֖ADI༵ࠃ

ڦፌႎᆈ࿔Ӳຕ๮֩ă

AD7792/AD7793

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 www.analog.com

ࠀీ઀཮

04855-001

DOUT/RD

DIN

SCLK

SERIAL

INTERFACE

AND

CONTROL

LOGIC

Σ-Δ

ADC

AD7792: 16-BIT

AD7793: 24-BIT

AIN1(+)

AIN1(–)

AIN2(+)

AIN2(–)

GND

MUX

BIAS

BAND GAP

REFERENCE

INTERNAL

CLOCK

CLK

GND

REFIN(–)/AIN3(–)

IOUT1

IOUT2

IN-AMPBUF

REFIN(+)/AIN3(+)

3ཚڢĂگሯำĂگࠀࡼĂ16/24࿋∑-Δ

ADCాዃೌాᅏ՗ݣٷഗࢅጚۉუᇸ

༬Ⴀ

ፌߛ23࿋ᆶၳݴՐ୲

ݛߵ(RMS)ሯำ

40 nV)4.17 Hz้*

85 nV)16.7 Hz้*

ۉୁǖ400 μA)ۆ႙ኵ*

ูۉఇ๕ǖ1 μA)ፌٷኵ*

گሯำՊײሺᅮᅏ՗ݣٷഗ

ټဤጚۉუᇸǈۆ႙࿒೏ኵྺ4 ppm/°C

߸ႎ໏୲ǖ4.17 Hz዁470 Hz

3ֶ߲ݴ๼෇

ాև้ዓናږഗ

50 Hz/60 Hzཞ้ᅞ዆

Պײۉୁᇸ

ೌాೋዃۉუ݀ิഗ

භ܏ۉୁ

ۉᇸۉუǖ2.7 V዁5.25 V

࿒܈ݔྷǖ-40ņ዁+105ņ

܀૬থۉᇸ

16ᆅগTSSOPހጎ

থ

! ෙ၍๕زႜথ

SPI®ĂQSPI™ĂMICROWIRE™ࢅDSPඹ

SCLKᆅগాڦแ௢༬ة݀

ᆌᆩ

ඤۉ౾֪ଉ

RTD֪ଉ

ඤ௺ۉፆ֪ଉ

ഘ༹ݴဆ

߾ᄽࡗײ዆

ᅏഗᅏ՗

Սၻ๕ᅏഗᅏ՗

ეᅂݴဆ

዇ీ݀พ

ᅂ၎/ഘ၎෥೷ᅏ

6࿋DVM

཮2/!

߁ຎ!

AD7792/AD7793ྺ๢ࢇߛ৛܈֪ଉᆌᆩڦگࠀࡼĂگሯ

ำĂྜኝఇెമ܋ǈాዃᅃ߲گሯำĂټᆶෙֶ߲ݴఇె

๼෇ڦ16࿋/24࿋Σ-Δ႙ADCă໲࣏ׯକೌాگሯำᅏ՗

ݣٷഗǈᅺܸ኱থ๼෇ၭ႑ࡽăړሺᅮยዃྺ64Ă߸ႎ

໏୲ྺ4.17 Hz้ǈݛߵ(RMS)ሯำྺ40 nVă

ଇഗ߳ጲాዃᅃ߲৛௢گሯำĂگ೏ᅎాևټဤጚ

ۉუᇸǈܸ൐ᄺ֑ᆩᅃ߲ྔևֶݴጚۉუăഄ໲ೌా

༬Ⴀ࣏ԈઔՊײ૤ۉୁᇸĂභ܏ۉୁᇸࢅೋዃۉუ݀

ิഗăೋዃۉუ݀ิഗᆩᇀཚڢڦࠌఇۉუยዃྺ

/2ă

ഗᅜ֑ᆩాև้ዓྔև้ዓ߾ፕǈ๼ຕ໏୲

ཚࡗ෉Պײยዃǈሞ4.17 Hz዁470 HzڦݔྷాՎࣅă

ഗ֑ᆩ2.7 V዁5.25 Vۉᇸࠃۉǈۆ႙ࠀࡼྺ400 μAǈ֑

ᆩ16ᆅগTSSOPހጎă

AD7792/AD7793

Rev. B | Page 2 of 32

Ⴊ۩૦๏

2007౎3ሆ—Ⴊ۩ӲA዁Ⴊ۩ӲB

2005౎4ሆ—Ⴊ۩Ӳ0዁Ⴊ۩ӲA

ణ୤!

߸ႎ߭๕ .................................................................................... ཚᆩ

߸߀ࠀీఇ઀཮ ......................................................................... 1

߸߀ຍࡀ߭ ................................................................................. 3

߸߀ຍࡀ߭࿂ጀ1 ....................................................................... 5

߸߀՗5Ă՗6Ă՗7 ..................................................................... 11

߸߀՗8Ă՗9Ă՗10 ................................................................... 12

߸߀՗16 ......................................................................................... 16

߸߀“߁ຎ”ևݴ ............................................................................ 20

“ᆌᆩ”ևݴڦఁ׬߸߀ྺ“ᆌᆩ႑တ” ................................. 29

߸߀“۩ࠔኸళ”ևݴ ................................................................... 30

߸߀“ܔፌٷܮۨኵ”ևݴ ........................................................ 8

߸߀཮17 ......................................................................................... 22

߸߀ຕ๼Պஓևݴ .............................................................. 24

߸߀ၯጚևݴ ................................................................................ 26

߸߀۩ࠔኸళ ................................................................................ 30

! ฿ۙ٪ഗ ............................................................................ 19

! ஢ଉײ٪ഗ ....................................................................... 19

ADCۉୟ႑တ ............................................................................... 20

!߁ຎ ......................................................................................... 20

! ຕጴথ ................................................................................ 21

ۉୟ௮ຎ ........................................................................................ 24

! ఇె๼෇ཚڢ ....................................................................... 24

! ᅏ՗ݣٷഗ ............................................................................ 24

! ມႠ/ڇႠದዃ ............................................................. 24

! ຕ๼Պஓ ....................................................................... 24

! භ܏ۉୁ ................................................................................ 25

! ૤ۉୁ ................................................................................ 25

! ೋዃۉუ݀ิഗ ................................................................... 25

! ጚۉუ ................................................................................ 25

!ް࿋ ......................................................................................... 25

ഗ .......................................................................... 26

!ၯጚ ......................................................................................... 26

! থںࢅք ............................................................................ 26

ᆌᆩ႑တ ........................................................................................ 28

! ૧ᆩඤۉ౾֪ଉ࿒܈ .......................................................... 28

!૧ᆩRTD֪ଉ࿒܈ ............................................................... 29

ྔႚ؅٫ ........................................................................................ 30

! ۩ࠔኸళ ................................................................................ 30

༬Ⴀ .................................................................................................. 1

ᆌᆩ ................................................................................................... 1

ࠀీ઀཮ ........................................................................................... 1

߁ຎ ................................................................................................... 1

Ⴊ۩૦๏ .......................................................................................... 2

ຍࡀ߭ ........................................................................................... 3

้Ⴞ༬Ⴀ ........................................................................................... 6

! ้Ⴞ཮ ...................................................................................... 7

ܔፌٷܮۨኵ ............................................................................. 8

ESDয়ߢ ................................................................................... 8

ᆅগದዃࢅࠀీ௮ຎ ..................................................................... 9

๼ሯำᇑݴՐ୲ࡀ߭ .............................................................. 11

! ྔևጚۉუᇸ ................................................................... 11

! ాևጚۉუ ....................................................................... 12

ۆ႙߾ፕ༬Ⴀ ................................................................................ 13

ೌా٪ഗ .................................................................................... 14

! ཚ႑٪ഗ ............................................................................ 14

! ጒༀ٪ഗ ............................................................................ 15

! ఇ๕٪ഗ ............................................................................ 15

! ದዃ٪ഗ ............................................................................ 17

! ຕ٪ഗ ............................................................................ 18

ID٪ഗ ................................................................................ 18

IO٪ഗ ............................................................................... 18

 AD7792/AD7793

Rev. B | Page 3 of 32

՗1.

֖ຕ! AD7792B/AD7793B

ڇ࿋ ֪๬ཉ/ጀ๥

4.17 ዁ 470

±15

±1

±10

±1

±3

100

ຍࡀ߭

أݥଷᆶຫ௽ǈAV

= 2.7 V዁5.25 VĂDV

= 2.7 V዁5.25 VĂGND = 0 Vǈ໯ᆶࡀ߭၎ܔᇀT

MIN

዁T

MAX

ܸჾă

ADCཚڢ

! ๼߸ႎ໏୲

! ࿮฿ஓ

! ݴՐ୲

! ๼ሯำᇑ߸ႎ໏୲

! ݴݥ၍Ⴀ

! ฿ۙဃֶ

! ฿ۙဃֶ೏ᅎᇑ࿒܈ڦ࠲ဣ

! ஢ଉײဃֶ

3, 5

! ሺᅮ೏ᅎᇑ࿒܈ڦ࠲ဣ

! ۉᇸᅞ዆

±V

REF

/ሺᅮ V nom

GND – 30 mV V min

+ 30 mV V max

GND + 100 mV V min

– 100 mV V max

GND + 300 mV V min

– 1.1 V max

0.5 V min

±1 nA max

±250 pA max

±2 pA/°C typ

±400 nA/V typ

±50 pA/V/°C typ

65 dB min

80 dB min

90 dB min

80 dB min

94 dB min

90 dB min

100 dB min

ఇె๼෇

! ֶݴ๼෇ۉუݔྷ

!ܔAINۉუ၌ኵ

! ࿮࣐؋ఇ๕

! ࣐؋ఇ๕

! ᅏ՗ݣٷഗᆶၳ

! ࠌఇۉუ(V

)

ఇె๼෇ۉୁ

! ࣐؋ఇ๕ᅏ՗ݣٷഗᆶၳ

! ! ೝ๼෇ۉୁ

! ! ೝ๼෇ۉୁ࿒೏

! ࿮࣐؋ఇ๕

! ! ೝ๼෇ۉୁ

! ! ೝ๼෇ۉୁ࿒೏

! زఇ߅ඡᅞ዆

! ! ాև้ዓ

!!!ሞ50 HzĂ60 Hzཉူ

!!!ሞ50 Hzཉူ

!!!ሞ60 Hzཉူ

! ! ྔև้ዓ

!!!ሞ50 HzĂ60 Hzཉူ

!!!ሞ50 Hzཉူ

!!!ሞ60 Hzཉူ

! ࠌఇᅞ዆

! ! ! ሞ኱ୁཉူ

!!!ሞ50 HzĂ60 Hzཉူ

HzǈՔ׬ኵ

࿋ǈፌၭኵ

ppm(஢ଉײݔྷڦ

ӥྤݴ୲)ǈፌٷኵ

Vǈۆ႙ኵ

nV/°Cǈۆ႙ኵ

Vǈۆ႙ኵ

ppm/°Cǈۆ႙ኵ

dBǈፌၭኵ

ADC

< 242 HzǈAD7793

AD7792

“๼ሯำᇑݴՐ୲ࡀ߭”

ሺᅮ = 1዁16ǈྔևጚۉუ

ሺᅮ = 32዁128

ǈྔևጚۉუ

AIN = 1 V/ሺᅮǈሺᅮ ≥ 4ǈྔևጚۉუ

REF

= REFIN(+) − REFIN(−)ǈాևጚۉუǈ

ሺᅮ = 1዁128

ሺᅮ = 12

ሺᅮ = 4዁128

VCM = (AIN(+) + AIN(−))/2ǈሺᅮ = 4዁128

ሺᅮ = 12ǈ߸ႎ໏୲ < 100 Hz

ሺᅮ = 4዁128ǈ߸ႎ໏୲ < 100 Hz

ሺᅮ = 12

๼෇ۉୁໜ๼෇ۉუܸՎࣅ

ۆ႙ኵ80 dBǈ50±1 Hzǈ60±1 HzǈFS[3:0] = 1010

ۆ႙ኵ90 dBǈ50 ± 1 HzǈFS[3:0] = 1001

ۆ႙ኵ100 dBǈ60 ± 1 HzǈFS[3:0] = 1000

ۆ႙ኵ90 dBǈ50±1 Hzǈ60±1 HzǈFS[3:0] = 1010

ۆ႙ኵ100 dBǈ50 ± 1 HzǈFS[3:0] = 1001

ۆ႙ኵ100 dBǈ60 ± 1 HzǈFS[3:0] = 1000

AIN = 1 V/ሺᅮǈሺᅮ ≥ 4

50 ± 1 Hzǈ60 ± 1 HzǈFS[3:0] = 1010

50±1 Hz (FS[3:0]=1001)

, 60±1 Hz (FS[3:0]=1000)

Rev. B | Page 4 of 32

AD7792B/AD7793B

1.17 ± 0.01% AV

= 4 V, T

= 25°C

2.5

REFIN = REFIN(+) − REFIN(−)

0.1

GND − 30 mV

+ 30 mV

400

±0.03

Same as for analog inputs

100

10/210/1000

±5

200

±0.5

0.2

− 0.65

− 1.1

GND − 30 mV

±2

0.81

See Figure 10

64 ± 3%

50:50

45:55 to 55:45

0.8 DV

= 5 V

0.4

2.0

= 3 V

= 3 V or 5 V

AD7792/AD7793

֖ຕ! ڇ࿋ ֪๬ཉ/ጀ๥

ጚۉუ

! ాևጚۉუ

! ! ాևጚۉუ؛๔৛܈

! ! ాևጚۉუ࿒೏

! ! ۉᇸᅞ዆

ྔևጚۉუᇸ

!!ྔևREFINۉუ

! ! ጚۉუݔྷ

!!ܔREFINۉუ၌ኵ

! ! ೝጚ๼෇ۉୁ

! ! ೝጚ๼෇ۉୁ࿒೏

! ! زఇ߅ඡᅞ዆

! ! ࠌఇᅞ዆

૤ۉୁᇸ

!)IEXC1ࢅIEXC2*

! ๼ۉୁ

! ؛๔ඹֶ(25°C)

!࿒೏

! ۉୁ೅ದ

! ࿒೏೅ದ

! ۉუۙኝ୲(VDD)

! ޶ሜۙኝ୲

! ๼ۉᇸۉუ

࿒܈دߌഗ!

!৛܈

!ଳ௺܈

ೋዃۉუ݀ิഗ

BIAS

݀ิഗഔۯ้

ాև/ྔև้ዓ

ాև้ዓ

ೕ୲

቞Բ

ྔև้ዓ

ೕ୲

቞Բ

இ๼෇

INL

ǈ๼෇گۉೝ

INH

ǈ๼෇ߛۉೝ

Vǈፌٷኵ

Vǈፌၭኵ

kHzǈፌၭኵ/ፌٷኵ

%ǈۆ႙ኵ

kHzǈՔ׬ኵ

%ǈۆ႙ኵ

°Cǈۆ႙ኵ

mV/°Cǈۆ႙ኵ

VǈՔ׬ኵ

ms/nFǈۆ႙ኵ

AǈՔ׬ኵ

%ǈۆ႙ኵ

ppm/°Cǈۆ႙ኵ

%ǈۆ႙ኵ

ppm/°Cǈۆ႙ኵ

%/Vǈۆ႙ኵ

Vǈፌٷኵ

Vǈፌၭኵ

Vǈፌၭኵ/ፌٷኵ

ppm/°Cǈۆ႙ኵ

ppm/°Cǈፌٷኵ

dBǈۆ႙ኵ

VǈՔ׬ኵ

Vǈፌၭኵ

Vǈፌٷኵ

Vǈፌၭኵ

Vǈፌٷኵ

nA/Vǈۆ႙ኵ

nA/V/°Cǈۆ႙ኵ

dBǈۆ႙ኵ

ړV

REF

= AV

้ǈසࡕᅏ՗ݣٷഗᆶၳǈ

ሶՂႷֶݴ๼෇၌዆ሞ0.9 × V

REF

/ሺᅮᅜా

IEXC1ᇑIEXC2ڦ೅ದǗV

OUT

= 0 V

= 5 V ± 5%

໯჋ۉୁྺ10 A210 A

໯჋ۉୁྺ1 mA

ኍܔᆩࢽၯጚ࿒܈دߌഗڦ൧઄

ൽᇀAINᆅগฉڦۉඹኵ

๑ᆩ2ݴೕࠀీ้)࿋CLK1 = CLK0 = 1*ǈ

ᅜ֑ᆩ128 kHzྔև้ዓ

๢ᆩᇀ64 kHzྔև้ዓǗසࡕ๟128 kHz้ዓǈ

቞Բᄲ൱ᅜฎگ

Rev. B | Page 5 of 32

AD7792B/AD7793B

1.4/2 V min/V max DV

= 5 V

0.8/1.7 V min/V max DV

= 5 V

0.1/0.17 V min/V max DV

= 5 V

0.9/2 V min/V max DV

= 3 V

0.4/1.35 V min/V max DV

= 3 V

0.06/0.13 V min/V max DV

= 3 V

±10

µA max

pF typ

= DV

 GND

໯ᆶຕጴ๼෇!

ۆ႙ኵ110 A (AV

= 3 V)ǈۆ႙ኵ125 A

(AV

= 5 V)ǈ࿮࣐؋ఇ๕ǈྔևጚۉუ

ۆ႙ኵ130 A (AV

= 3 V)ǈۆ႙ኵ165 A

(

= 5 V)ǈ࣐؋ఇ๕ǈሺᅮ = 12ǈྔևጚۉუ

ۆ႙ኵ300 A (AV

= 3 V)ǈۆ႙ኵ350 A

(AV

= 5 V)ǈሺᅮ = 4዁128ǈྔևጚۉუ

ۆ႙ኵ400 A (AV

= 3 V)ǈۆ႙ኵ450 A

(AV

= 5 V)ǈሺᅮ = 4዁128ǈాևጚۉუ

− 0.6

V min DV

= 3 V, I

SOURCE

= 100 µA

0.4 V max DV

= 3 V, I

SINK

= 100 µA

4 V min DV

= 5 V, I

SOURCE

= 200 µA

0.4 V max

= 5 V, I

SINK

= 1.6 mA (DOUT/RDY)/800 µA

(CLK)

±10 µA max

10 pF typ

Oset binary

+1.05 × FS V max

−1.05 × FS

V min

0.8 × FS V min

2.1 × FS V max

2.7/5.25 V min/max

140 µA max

581 µA max

004 µA max

005 µA max

1 µA max

AD7792/AD7793

֖ຕ! ڇ࿋ ֪๬ཉ/ጀ๥

SCLKĂCLKࢅDIN

)แ௢༬ة݀ഗ๼෇*

VT(+)

VT(–)

VT(+) −VT(−)

VT(+)

VT(–)

VT(+) −VT(−)

๼෇ۉୁ

๼෇ۉඹ

இ๼(ԈઔCLK)

ǈ๼ߛۉუ

ǈ๼گۉუ

ǈ๼ߛۉუ

ǈ๼گۉუ

! ޝༀ୑ۉୁ

! ޝༀ๼ۉඹ

! ຕ๼Պஓ

ဣཥၯጚ

஢ଉײၯጚ၌ኵ

ଭۉೝၯጚ၌ኵ

๼෇ݔྷ

ۉᇸᄲ൱

ۉᇸۉუ

዁GND

ۉᇸۉୁ

ۉୁ

(ูۉఇ๕)

࿒܈ݔྷྺ-40ņ዁+105ņăሞ߸ႎ໏୲ٳڟ19.6 Hzࢅ39.2 HzڦཉူǈසࡕAIN(+)AIN(−)ᆅগฉڦۉუኵגࡗAV

– 16 VǈሶINLĂۉᇸᅞ዆(PSR)Ăࠌఇ

ᅞ዆(CMR)ࢅزఇ߅ඡᅞ዆(NMR)փޙࢇຕ๮֩ຍࡀ߭ڦᄲ൱ă૩සǈړגࡗُۉუ้ǈINLۆ႙ኵই዁஢ଉײڦ18 ppmǈPSRۆ႙ኵই዁69 dBăᅺُǈ

ྺԍኤኄၵ߸ႎ໏୲ူڦႠీǈఇె๼෇ᆅগฉڦܔۉუՂႷگᇀAV

− 1.6 Vă

ຍࡀ߭࿄ঢ়ิׂ֪๬ǈڍ๴ׂ೗؛๔݀ք้ڦ༬Ⴀຕኧ׼ă

ঢ়ၯጚǈُဃֶᇑ჋ۨڦՊײሺᅮࢅ߸ႎ໏୲໯ܔᆌڦሯำ၎ړă

ሞඪᅪ࿒܈ူ৊ႜዘႎၯጚᅜၩأኄၵဃֶă

஢ଉײဃֶ๢ᆩᇀኟĂ޶ଇዖ஢ଉײǈժሞ߾׍ၯጚཉူ๢ᆩ(AV

= 4 Vǈሺᅮ = 1ǈT

= 25°C)ă

FS[3:0]ྺఇ๕٪ഗዐڦ຺࿋ǈᆩઠ჋ስ๼ጴ໏୲ă

্ᆩ૤ۉୁࢅೋዃۉუ݀ิഗ้ǈຕጴ๼෇ڪᇀDV

GNDă

剩余31页未读，继续阅读

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2013-12-23

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