AD7795BRUZ

6ཚ‫ڢ‬Ă‫گ‬ሯำĂ‫ࡼࠀگ‬24/16࿋∑-Δ႙ ADCLjాዃೌాᅏ՗‫ٷݣ‬ഗࢅएጚ‫ۉ‬უᇸ AD7794/AD7795 ༬Ⴀ ‫ۉ‬ጱ‫׹‬ ᆌՎቆ‫ߌد‬ഗ ഘ༹‫ݴ‬ဆ ߾ᄽࡗ‫ײ‬੦዆ ᅏഗᅏ՗ ეᅂ‫ݴ‬ဆ ዇ీ݀พऐ ᅂ၎/ഘ၎෥೷ᅏ 6࿋DVM ፌߛ23࿋ᆶၳ‫ݴ‬Ր୲ ਩‫(ߵݛ‬RMS)ሯำǖ40 nV(4.17 Hz้)Lj85 nV(16.7 Hz้) ‫ୁۉ‬ǖ400 μA(‫ۆ‬႙ኵ) ู‫ۉ‬ఇ๕ǖፌ‫ٷ‬1 μA ‫گ‬ሯำ੗Պ‫ײ‬ሺᅮᅏ՗‫ٷݣ‬ഗ ‫ټ‬ဤएጚ‫ۉ‬უᇸLj‫ۆ‬႙࿒೏ኵྺ4 ppm/°C ߸ႎ໏୲ǖ4.17 Hz዁470 Hz 6ୟֶ‫ݴ‬ఇె๼෇ ాև้ዓና‫ږ‬ഗ 50 Hz/60 Hzཞ้ᅞ዆ एጚ‫ۉ‬უॠ֪ ੗Պ‫ୁۉײ‬ᇸ ೌాೋዃ‫ۉ‬უ݀ิഗ භ܏‫ୁۉ‬੦዆ ‫ۉ܋گ‬ᇸਸ࠲ ‫ۉ‬ᇸ‫ۉ‬უǖ2.7 V዁5.25 V ࿒‫ྷݔ܈‬ǖ Bपǖ–40°C዁+105°C Cपǖ–40°C዁+125°C ‫܀‬૬থ੨‫ۉ‬ᇸ 24ᆅগTSSOP‫ހ‬ጎ ෙ၍๕‫ز‬ႜথ੨ SPI®ĂQSPI™ĂMICROWIRE™ĂDSPग़ඹ SCLKฉྺแ௢༬‫݀ة‬ഗ ߁ຎ! AD7794/AD7795਩ྺ๢ࢇߛ৛‫֪܈‬ଉᆌᆩ‫ࡼࠀگڦ‬Ă‫گ‬ሯ ำĂྜኝఇెമ‫܋‬Ljాዃᅃ߲‫گ‬ሯำ24࿋/16࿋‫ڦ‬6ୟֶ‫ݴ‬ ๼෇‫ڦ‬Σ-Δ ADCǗ࣏ण‫ׯ‬କೌా‫گ‬ሯำᅏ՗‫ٷݣ‬ഗLjᅺܸ ੗኱থ๼෇ၭ႑ࡽ‫ڟ‬ADCă ௅੼ഗॲ਩ాዃᅃ߲৛௢‫گ‬ሯำĂ‫گ‬࿒೏ాև‫ټ‬ဤएጚ‫ۉ‬ უᇸLjᄺ੗֑ᆩፌ‫ܠ‬ଇ߲ྔևֶ‫ݴ‬एጚ‫ۉ‬უăഄ໲ೌా༬ ႠԈઔ੗Պ‫ײ‬घ૤‫ୁۉ‬ᇸĂභ܏‫ୁۉ‬੦዆ࢅೋዃ‫ۉ‬უׂิ ഗLj૧ᆩೋዃ‫ۉ‬უׂิഗ੗ॽగᅃཚ‫ࠌڦڢ‬ఇ‫ۉ‬უยዃྺ AVDD/2ă‫ۉ܋گ‬ᇸਸ࠲੗ᆩઠሞଇْገ࣑ኮक़࠲܏ൃ๕‫د‬ ߌഗLjܸٗ๑ဣཥࠀࡼই዁ፌ‫گ‬ăAD7794/AD7795੗ᅜ֑ ᆩాև้ዓईྔև้ዓ߾ፕLj๼‫؜‬ຕ਍໏୲੗ሞ4.17 Hz዁ 470 Hz‫ాྷݔڦ‬Վࣅă ଇ੼ഗॲ਩֑ᆩ2.7 V዁5.25 V‫ۉ‬ᇸࠃ‫ۉ‬ăBपഗॲ(AD7794 ࢅAD7795)‫ۨܮڦ‬࿒‫ྺྷݔ܈‬−40°C዁+105°CLjܸCपഗॲ (AD7794)‫ۨܮڦ‬࿒‫ྺྷݔ܈‬−40°C዁+125°Căኄၵഗॲ‫ڦ‬ ‫ۆ‬႙ࠀࡼྺ 400 μALj֑ᆩ24ᆅগTSSOP‫ހ‬ጎă ᆌᆩ ࿒‫֪܈‬ଉ უ૰֪ଉ ࠀీ઀཮ GND AVDD AIN4(+)/REFIN2(+) REFIN1(+) AIN4(–)/REFIN2(–) REFIN1(–) VBIAS VDD AIN1(+) AIN1(–) AIN2(+) AIN2(–) AIN3(+) AIN3(–) AIN5(+)/IOUT2 AIN5(–)/IOUT1 AIN6(+)/P1 AIN6(–)/P2 REFERENCE DETECT BAND GAP REFERENCE GND BUF Σ-Δ ADC IN-AMP MUX SERIAL INTERFACE AND LOGIC CONTROL DOUT/RDY DIN SCLK CS GND TEMP SENSOR INTERNAL CLOCK DVDD AD7794/AD7795 VDD PSW GND CLK Rev. D 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. Specifications 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. 04854-001 AD7794: 24-BIT ADC AD7795: 16-BIT ADC ཮1 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2004–2007 Analog Devices, Inc. All rights reserved. ADIዐ࿔Ӳຕ਍๮֩๟ᆈ࿔Ӳຕ਍๮֩‫ڦ‬ᅳ࿔Lj৤൩ଌ঴‫݋‬ᅳዐ੗ీ٪ሞ‫ڦ‬ᇕჾፇኯई‫݋‬ᅳ‫ٱ‬ဃLjADIփ‫݋ܔ‬ᅳዐ٪ሞ‫ֶڦ‬ᅴईᆯׂُิ‫ٱڦ‬ဃ޶ሴăසႴඓණඪࢆَᇕ‫ڦ‬ጚඓႠLj൩֖੊ADI༵ࠃ ‫ڦ‬ፌႎᆈ࿔Ӳຕ਍๮֩ă AD7794/AD7795  ణ୤ ༬Ⴀ ................................................................................................... 1 ! ᆌᆩ ................................................................................................... 1 ADC‫ۉ‬ୟ႑တ ............................................................................... 26 ஢ଉ‫ײ‬स٪ഗ ....................................................................... 25 ߁ຎ ................................................................................................... 1 ! ߁ຎ ......................................................................................... 26 ࠀీ઀཮ ........................................................................................... 1 ! ຕጴথ੨ ................................................................................ 28 Ⴊ۩૦๏ ........................................................................................... 2 ‫ۉ‬ୟ௮ຎ ........................................................................................ 31 रຍࡀ߭ ........................................................................................... 3 ! ้Ⴞ༬Ⴀ ........................................................................................... 8 ఇె๼෇ཚ‫ ڢ‬....................................................................... 31 ᅏ՗‫ٷݣ‬ഗ ............................................................................ 31 ้Ⴞ཮ ............................................................................................... 9 ! ມटႠ/‫ڇ‬टႠದዃ ............................................................. 31 ਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ ........................................................................... 10 ! ຕ਍๼‫؜‬Պஓ ....................................................................... 32 භ܏‫ ୁۉ‬................................................................................ 32 ESDয়ߢ ................................................................................. 10 ᆅগದዃࢅࠀీ௮ຎ ................................................................... 11 घ૤‫ ୁۉ‬................................................................................ 32 ਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀ .......................................................... 13 ! ೋዃ‫ۉ‬უ݀ิഗ ................................................................... 32 ! ቘհ๑ీ ................................................................................ 13 ! एጚ‫ۉ‬უ ................................................................................ 32 ! ቘհ্ᆩ ................................................................................ 15 ! एጚ‫ۉ‬უॠ֪ ....................................................................... 33 ‫ۆ‬႙߾ፕ༬Ⴀ ................................................................................ 16 ! ް࿋ ......................................................................................... 33 ೌాस٪ഗ .................................................................................... 17 ! AVDD॔੦ഗ .......................................................................... 33 ! ཚ႑स٪ഗ ............................................................................ 17 ! ၯጚ ......................................................................................... 33 ! ጒༀस٪ഗ ............................................................................ 18 ! থ‫ࢅں‬քਆ ............................................................................ 34 ! ఇ๕स٪ഗ ............................................................................ 19 ᆌᆩ႑တ ........................................................................................ 35 ! ದዃस٪ഗ ............................................................................ 22 ! ! ຕ਍स٪ഗ ............................................................................ 24 ྔႚ؅٫ ........................................................................................ 36 IDस٪ഗ ................................................................................ 24 ! ୁଉऺ .................................................................................... 35 ۩ࠔኸళ ................................................................................ 36 IOस٪ഗ ................................................................................ 24 ! ฿ۙस٪ഗ ............................................................................ 25 Ⴊ۩૦๏ 2007౎3ሆ—Ⴊ۩ӲC዁Ⴊ۩ӲD 　　　　　　　　　　　 2005౎4ሆ—Ⴊ۩Ӳ0዁Ⴊ۩ӲA 　　　　　　　　　　　 ߸߀रຍࡀ߭࿂ጀ1 ....................................................................... 7 ߸߀ਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ ..................................................................... 9 ߸߀ጒༀस٪ഗև‫ ݴ‬................................................................... 18 ߸߀཮21 ......................................................................................... 25 ߸߀۩ࠔኸళ ................................................................................ 36 ߸߀ຕ਍๼‫؜‬Պஓև‫ ݴ‬.............................................................. 28 2006౎10ሆ—Ⴊ۩ӲB዁Ⴊ۩ӲC 　　　　　　　　　　　 ߸߀ၯጚև‫ ݴ‬................................................................................ 30 ߭๕߸ႎ .................................................................................... ཚᆩ ߸߀۩ࠔኸళ ................................................................................ 33 ሺेAD7794 Cपഗॲ ............................................................. ཚᆩ 2004౎10ሆ—Ⴊ۩Ӳ0ǖ‫؛‬๔Ӳ ߸߀रຍࡀ߭ .................................................................................. 3 ߸߀۩ࠔኸళ ................................................................................ 36 2006౎6ሆ—Ⴊ۩ӲA዁Ⴊ۩ӲB ሺेAD7795 .............................................................................. ཚᆩ ߸߀༬Ⴀ ........................................................................................... 1 ߸߀՗1 ............................................................................................. 3 ߸߀਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀև‫ ݴ‬........................................ 12 ߸߀՗19 ......................................................................................... 20 ߸߀ADC‫ۉ‬ୟ႑တև‫ ݴ‬.............................................................. 25 ߸߀۩ࠔኸళ ................................................................................ 35 Rev. D | Page 2 of 36 AD7794/AD7795  रຍࡀ߭ ‫ݥأ‬ଷᆶຫ௽LjAVDD = 2.7 V዁5.25 VLjDVDD = 2.7 V዁5.25 VLjGND = 0 VLj໯ᆶࡀ߭਩၎‫ܔ‬ᇀTMIN዁TMAXܸჾă ՗1 ֖ຕ1 ቘհ๑ీ ๼‫߸؜‬ႎ໏୲ ࿮฿ஓ2 AD7794 AD7795 ‫ݴ‬Ր୲ ਩‫ߵݛ‬ሯำᇑ߸ႎ໏୲ ओ‫ݥݴ‬၍Ⴀ ฿ۙဃֶ3 3 ฿ۙဃֶ೏ᅎᇑ࿒‫࠲ڦ܈‬ဣ4 ஢ଉ‫ײ‬ဃֶ3, 5 ሺᅮ೏ᅎᇑ࿒‫࠲ڦ܈‬ဣ4 ‫ۉ‬ᇸᅞ዆ ఇె๼෇ ֶ‫ݴ‬๼෇‫ۉ‬უ‫ྷݔ‬ AIN‫ۉ‬უਨ‫ܔ‬၌ኵ2 ࿮࣐؋ఇ๕ ࣐؋ఇ๕ ᅏ՗‫ٷݣ‬ഗᆶၳ ࠌఇ‫ۉ‬უVCM ఇె๼෇‫ୁۉ‬ ࣐؋ఇ๕ईᅏ՗‫ٷݣ‬ഗᆶၳ Active ೝ਩๼෇‫ୁۉ‬2 AD7794B/AD7795B AD7794C ೝ਩๼෇‫ୁۉ‬࿒೏ ࿮࣐؋ఇ๕ ೝ਩๼෇‫ୁۉ‬ ೝ਩๼෇‫ୁۉ‬࿒೏ ‫׉‬ఇᅞ዆2, 6 ాև้ዓ @ 50 Hz, 60 Hz @ 50 Hz @ 60 Hz ྔև้ዓ @ 50 Hz, 60 Hz @ 50 Hz @ 60 Hz AD7794/AD7795 ‫ڇ‬࿋ ֪๬ཉॲ/ጀ๥ 4.17 ዁ 470 HzLjՔ‫׬‬ኵ ॺ૬้क़ = 2/๼‫߸؜‬ႎ໏୲ 24 16 ࿋Ljፌၭኵ ࿋Ljፌၭኵ fADC ≤ 242 Hz ֖९਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀև‫ݴ‬ ֖९਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀև‫ݴ‬ ±1 ±10 ±10 ±1 ±3 100 ஢ଉ‫ڦྷݔײ‬ӥྤ ‫(୲ݴ‬ppm)Ljፌ‫ٷ‬ኵ μVLj‫ۆ‬႙ኵ nV/°CLj‫ۆ‬႙ኵ μVLj‫ۆ‬႙ኵ ppm/°CLj‫ۆ‬႙ኵ ሺᅮ = 1዁16Ljྔևएጚ‫ۉ‬უ ppm/°CLj‫ۆ‬႙ኵ ሺᅮ = 32዁128Ljྔևएጚ‫ۉ‬უ dBLjፌၭኵ AIN = 1 V/ሺᅮLjሺᅮ ≥ 4Ljྔևएጚ‫ۉ‬უ ±VREF/ሺᅮ VLjՔ‫׬‬ኵ VREF = REFIN(+) − REFIN(−), Ljईాևएጚ‫ۉ‬უLj ሺᅮ = 1዁128 GND − 30 mV AVDD + 30 mV GND + 100 mV AVDD − 100 mV GND + 300 mV AVDD − 1.1 0.5 VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ ሺᅮ = 1ई2 ±1 ±250 ±1 ±3 ±2 ±3 ±2 nALjፌ‫ٷ‬ኵ pALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ pA/°CLj‫ۆ‬႙ኵ ±400 ±50 ሺᅮ = 1ई2 nA/VLj‫ۆ‬႙ኵ ๼෇‫ୁۉ‬ໜ๼෇‫ۉ‬უܸՎࣅ pA/V/°CLj‫ۆ‬႙ኵ 65 80 90 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ ‫ۆ‬႙ኵ80 dBLj50±1 HzLj60±1 HzLjFS[3:0]=1010 ‫ۆ‬႙ኵ90 dBLj50 ± 1 HzLjFS[3:0] = 1001 ‫ۆ‬႙ኵ100 dBLj60 ± 1 HzLjFS[3:0] = 1000 80 94 90 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ ‫ۆ‬႙ኵ90 dBLj50±1 HzLj60±1 HzLjFS[3:0]=1010 ‫ۆ‬႙ኵ100 dBLj50 ± 1 HzLjFS[3:0] = 1001 ‫ۆ‬႙ኵ100 dBLj60 ± 1 HzLjFS[3:0] = 1000 ±15 Rev. D | Page 3 of 36 ሺᅮ = 1ई2 ሺᅮ = 4዁128 VCM = (AIN(+) + AIN(−))/2, ሺᅮ=4዁128 ሺᅮ= 1ई2Lj߸ႎ໏୲ < 100 Hz ሺᅮ= 4዁128Lj߸ႎ໏୲ < 100 Hz AIN6(+)/AIN6(−) ሺᅮ= 1ई2Lj߸ႎ໏୲ < 100 Hz ሺᅮ= 4዁128Lj߸ႎ໏୲ < 100 Hz AIN6(+)/AIN6(−) AD7794/AD7795 ֖ຕ1 ࠌఇᅞ዆ AD7794B/AD7795B @ DC @ 50 Hz, 60 Hz2 @ 50 Hz, 60 Hz2 AD7794C @ DC @ 50 Hz, 60 Hz2 @ 50 Hz, 60 Hz2 ቘհ্ᆩ ๼‫߸؜‬ႎ໏୲ ࿮฿ஓ2 AD7794 AD7795 ‫ݴ‬Ր୲ ਩‫ߵݛ‬ሯำᇑ߸ႎ໏୲ ओ‫ݥݴ‬၍Ⴀ ฿ۙဃֶ3 ฿ۙဃֶ೏ᅎᇑ࿒‫࠲ڦ܈‬ဣ4 ஢ଉ‫ײ‬ဃֶ3, 5 3, 5 ሺᅮ೏ᅎᇑ࿒‫࠲ڦ܈‬ဣ4 ‫ۉ‬ᇸᅞ዆ ఇె๼෇ ֶ‫ݴ‬๼෇‫ۉ‬უ‫ྷݔ‬ AIN‫ۉ‬უਨ‫ܔ‬၌ኵ2 ࿮࣐؋ఇ๕ ࣐؋ఇ๕ ᅏ՗‫ٷݣ‬ഗᆶၳ ࠌఇ‫ۉ‬უVCM  AD7794/AD7795 ‫ڇ‬࿋! ֪๬ཉॲ/ጀ๥ 100 100 100 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ AIN = 1 V/ሺᅮLjሺᅮ ≥ 4 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010 50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000 97 97 97 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ AIN = 1 V/ሺᅮLjሺᅮ ≥ 4 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010 50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000 4.17 ዁ 470 HzLjՔ‫׬‬ኵ ॺ૬้क़ = 1/๼‫߸؜‬ႎ໏୲ 24 16 ࿋Ljፌၭኵ ࿋Ljፌၭኵ fADC ≤ 123 Hz ֖९਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀև‫ݴ‬ ֖९਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀև‫ݴ‬ ±100/ሺᅮ ±100/ሺᅮ 10 ±10 ±1 ±3 100 ஢ଉ‫ڦྷݔײ‬ӥྤ ‫(୲ݴ‬ppm)Ljፌ‫ٷ‬ኵ μVLj‫ۆ‬႙ኵ nV/°CLj‫ۆ‬႙ኵ nV/°CLj‫ۆ‬႙ኵ μVLj‫ۆ‬႙ኵ ppm/°CLj‫ۆ‬႙ኵ ppm/°CLj‫ۆ‬႙ኵ dBLj‫ۆ‬႙ኵ ±VREF/ሺᅮ VLjՔ‫׬‬ኵ VREF = REFIN(+) − REFIN(−), ईాևएጚ‫ۉ‬უLj ሺᅮ = 1዁128 GND − 30 mV AVDD + 30 mV GND + 100 mV AVDD − 100 mV GND + 300 mV AVDD − 1.1 0.2 + (ሺᅮ/2 × (AIN(+) − AIN(−))) AVDD − 0.2 − (ሺᅮ/2 × (AIN(+) − AIN(−))) VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ ሺᅮ = 1ई2 ±1 ±250 ±1 ±3 ±2 ±3 ±2 nALjፌ‫ٷ‬ኵ pALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ nALjፌ‫ٷ‬ኵ pA/°CLj‫ۆ‬႙ኵ ±400 ±50 ሺᅮ = 1ई2 nA/VLj‫ۆ‬႙ኵ ๼෇‫ୁۉ‬ໜ๼෇‫ۉ‬უܸՎࣅ pA/V/°CLj‫ۆ‬႙ኵ ±15 ࿮ၯጚ ሺᅮ = 1዁16 ሺᅮ = 32዁128 ሺᅮ = 1዁16Ljྔևएጚ‫ۉ‬უ ሺᅮ = 32዁128Ljྔևएጚ‫ۉ‬უ AIN = 1 V/ሺᅮLjሺᅮ ≥ 4Ljྔևएጚ‫ۉ‬უ ሺᅮ = 1ई2 ሺᅮ = 4዁128 AMP − CM = 1, VCM = (AIN(+) + AIN(–))/2, ሺᅮ = 4 ዁ 128 VLjፌ‫ٷ‬ኵ ఇె๼෇‫ୁۉ‬ ࣐؋ఇ๕ईᅏ՗‫ٷݣ‬ഗᆶၳ ೝ਩๼෇‫ୁۉ‬2 AD7794B/AD7795B AD7794C ೝ਩๼෇‫ୁۉ‬೏ᅎ ࿮࣐؋ఇ๕ ೝ਩๼෇‫ୁۉ‬ ೝ਩๼෇‫ୁۉ‬೏ᅎ Rev. D | Page 4 of 36 ሺᅮ = 1ई2 ሺᅮ = 4዁128 AIN6(+)/AIN6(−) ሺᅮ = 1ई2 ሺᅮ = 4዁128 AIN6(+)/AIN6(−) AD7794/AD7795  ֖ຕ1 ‫׉‬ఇᅞ዆2, 6 ాև้ዓ @ 50 Hz, 60 Hz @ 50 Hz @ 60 Hz ྔև้ዓ @ 50 Hz, 60 Hz @ 50 Hz @ 60 Hz ࠌఇᅞ዆ AD7794B/AD7795B @ DC @ 50 Hz, 60 Hz2 @ 50 Hz, 60 Hz2 AD7794C @ DC @ 50 Hz, 60 Hz2 @ 50 Hz, 60 Hz2 ቘհ๑ీई্ᆩ एጚ‫ۉ‬უ๼෇ ాևएጚ‫ۉ‬უ ాևएጚ‫ۉ‬უ‫؛‬๔৛‫܈‬ AD7794/AD7795 ‫ڇ‬࿋! 60 78 86 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ ‫ۆ‬႙ኵ70 dBLj50±1 HzLj60±1 HzLjFS[3:0]=1010 ‫ۆ‬႙ኵ90 dBLj50 ± 1 HzLjFS[3:0] = 1001 ‫ۆ‬႙ኵ100 dBLj60 ± 1 HzLjFS[3:0] = 1000 60 94 90 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ ‫ۆ‬႙ኵ70 dBLj50±1 HzLj60±1 HzLjFS[3:0]=1010 ‫ۆ‬႙ኵ100 dBLj50 ± 1 HzLjFS[3:0] = 1001 ‫ۆ‬႙ኵ100 dBLj60 ± 1 HzLjFS[3:0] = 1000 100 100 100 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ AIN = 1 V/ሺᅮLjሺᅮ = 4LjAMP-CM Bit = 1 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010 50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000 97 97 97 dBLjፌၭኵ dBLjፌၭኵ dBLjፌၭኵ AIN = 1 V/ሺᅮLjሺᅮ = 4LjAMP-CM Bit = 1 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010 50 ± 1 Hz, FS[3:0] = 1001; 60 ± 1 Hz, FS[3:0] = 1000 1.17 ± 0.01% 4 15 85 VLjፌၭኵ AVDD = 4 V, TA = 25°C /ፌ‫ٷ‬ኵ ppm/°CLj‫ۆ‬႙ኵ ppm/°CLjፌ‫ٷ‬ኵ dBLj‫ۆ‬႙ኵ 2.5 0.1 AVDD VLjՔ‫׬‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ ೝ਩एጚ๼෇‫ୁۉ‬ GND − 30 mV AVDD + 30 mV 400 VLjፌၭኵ VLjፌ‫ٷ‬ኵ nA/VLj‫ۆ‬႙ኵ ೝ਩एጚ๼෇‫ୁۉ‬೏ᅎ ±0.03 nA/V/°CLj‫ۆ‬႙ኵ 100 0.3 0.65 dBLj‫ۆ‬႙ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ 10/210/1000 ±5 200 ±0.5 50 2 0.2 AVDD − 0.65 AVDD − 1.1 GND − 30 mV μALjՔ‫׬‬ኵ %Lj‫ۆ‬႙ኵ ppm/°CLj‫ۆ‬႙ኵ %Lj‫ۆ‬႙ኵ ppm/°CLj‫ۆ‬႙ኵ %/VLj‫ۆ‬႙ኵ %/VLj‫ۆ‬႙ኵ VLjፌ‫ٷ‬ኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ ాևएጚ‫ۉ‬უ೏ᅎ2 ‫ۉ‬ᇸᅞ዆ ྔևएጚ‫ۉ‬უ ྔևREFIN‫ۉ‬უ एጚ‫ۉ‬უ‫ྷݔ‬2 REFIN‫ۉ‬უਨ‫ܔ‬၌ኵ2 ‫׉‬ఇᅞ዆2 ࠌఇᅞ዆ एጚ‫ۉ‬უॠ֪‫ۉ‬ೝ घ૤‫ୁۉ‬ᇸ (IEXC1 ࢅ IEXC2) ๼‫ୁۉ؜‬ ‫؛‬๔ඹֶ(25°C) ೏ᅎ ‫ୁۉ‬೅ದ ೏ᅎ೅ದ ‫ۉ‬უۙኝ୲(AVDD) DD) ޶ሜۙኝ୲ ๼‫ۉ؜‬ᇸ‫ۉ‬უ !!!!!!!!֪๬ཉॲ/ጀ๥ REFIN = REFIN(+) − REFIN(−) ‫ړ‬VREF = AVDD้Ljසࡕᅏ՗‫ٷݣ‬ഗᆶၳLj ሶֶ‫ݴ‬๼෇ՂႷ၌዆ሞ0.9×VREF/ሺᅮᅜా ᇑఇె๼෇၎ཞ Rev. D | Page 5 of 36 VREF < 0.3 V้NOXREF࿋ᆶၳ IEXC1ᇑIEXC2‫ڦ‬೅ದLjVOUT = 0 V AVDD = 5 V ± 5% ‫ୁۉ‬ᇸยዃྺ10 μAई210 μA ‫ୁۉ‬ᇸยዃྺ1 mA AD7794/AD7795 ֖ຕ1 ೋዃ‫ۉ‬უ݀ิഗ VBIAS VBIAS ݀ิഗഔ‫้ۯ‬क़ ࿒‫ߌد܈‬ഗ ৛‫܈‬ ଳ௺‫܈‬ ‫ۉ܋گ‬ᇸਸ࠲ RON ඹႹ‫ୁۉ‬2 ຕጴ๼‫؜‬DŽP1ࢅP2Dž VOH, ๼‫ۉߛ؜‬უ2 VOL, ๼‫ۉگ؜‬უ2 VOH, ๼‫ۉߛ؜‬უ2 VOL, ๼‫ۉگ؜‬უ2 ాև/ྔև้ዓ ాև้ዓ ೕ୲2 ቞੣Բ ྔև้ዓ ೕ୲ ቞੣Բ இड๼෇ CS2 VINL, ๼෇‫ۉگ‬უ VINH, ๼෇ߛ‫ۉ‬უ SCLK)แ௢༬‫݀ة‬ഗ๼෇*Ă CLKࢅDIN2 AD7794B/AD7795B VT(+) VT(−) VT(+) ዁ V T(−) VT(+) VT(−) VT(+) ዁ V T(−) AD7794C VT(+) VT(−) VT(+) to VT(−) VT(+) VT(−) VT(+) ዁ V T(−) ๼෇‫ୁۉ‬ ๼෇‫ۉ‬ඹ AD7794/AD7795 ‫ڇ‬࿋ ֪๬ཉॲ/ጀ๥ AVDD/2 VLjՔ‫׬‬ኵ ms/nFLj‫ۆ‬႙ኵ ൽਦᇀAIN໯૶‫ۉڦ‬ඹǗ֖९཮11 ±2 0.81 °CLj‫ۆ‬႙ኵ mV/°CLj‫ۆ‬႙ኵ ኍ‫ܔ‬ᆩࢽၯጚ࿒‫ߌد܈‬ഗ‫ڦ‬൧઄ 7 9 30 ΩLjፌ‫ٷ‬ኵ ΩLjፌ‫ٷ‬ኵ mALjፌ‫ٷ‬ኵ AVDD = 5 V AVDD = 3 V ૶Ⴤ‫ୁۉ‬ AVDD − 0.6 0.4 4 0.4 VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ AVDD = 3 V, ISOURCE = 100 μA AVDD = 3 V, ISINK = 100 μA AVDD = 5 V, ISOURCE = 200 μA AVDD = 5 V, ISINK = 800 μA 64 ± 3% 50:50 kHzLjፌၭኵ/ፌ‫ٷ‬ኵ min/max %Lj‫ۆ‬႙ኵ 64 kHzLjՔ‫׬‬ኵ 45:55 to 55:45 %Lj‫ۆ‬႙ኵ 0.8 0.4 2.0 VLjፌ‫ٷ‬ኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ DVDD = 5 V DVDD = 3 V DVDD = 3 V ई 5 V 1.4/2 0.8/1.7 0.1/0.17 0.9/2 0.4/1.35 0.06/0.13 VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ DVDD = 5 V DVDD = 5 V DVDD = 5 V DVDD = 3 V DVDD = 3 V DVDD = 3 V 1.35/2.05 0.8/1.9 0.1/0.19 0.9/2 0.4/1.35 0.06/0.15 ±10 10 VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ VLjፌၭኵ/ፌ‫ٷ‬ኵ μALjፌ‫ٷ‬ኵ pFLj‫ۆ‬႙ኵ DVDD = 5 V DVDD = 5 V DVDD = 5 V DVDD = 3 V DVDD = 3 V DVDD = 3 V VIN = DVDD ई GND ໯ᆶຕጴ๼෇ Rev. D | Page 6 of 36 ๑ᆩ2‫ݴ‬ೕࠀీ้)࿋CLK1 = CLK0 = 1*Lj੗ᅜ ֑ᆩ128 kHzྔև้ዓ ๢ᆩᇀ64 kHzྔև้ዓǗසࡕ๟128 kHz้ዓLj ቞੣Բᄲ൱੗ᅜฎ‫گ‬ AD7794/AD7795 ֖ຕ1 இड๼‫؜‬DŽԈઔCLKDž VOH, ๼‫ۉߛ؜‬უ2 VOL, ๼‫ۉگ؜‬უ2 VOH, ๼‫ۉߛ؜‬უ2 VOL, ๼‫ۉگ؜‬უ2 ‫ޝ‬੣ༀႅ୑‫ୁۉ‬ ‫ޝ‬੣ༀ๼‫ۉ؜‬ඹ ຕ਍๼‫؜‬Պஓ ဣཥၯጚ2 ஢ଉ‫ײ‬ၯጚ၌ኵ ଭ‫ۉ‬ೝၯጚ၌ኵ ๼෇‫ྷݔ‬ AD7794/AD7795 ‫ڇ‬࿋ DVDD − 0.6 0.4 4 0.4 ±10 10 ೋᅎܾ৊዆ VLjፌၭኵ VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ μALjፌ‫ٷ‬ኵ pFLj‫ۆ‬႙ኵ 1.05 × FS −1.05 × FS 0.8 × FS 2.1 × FS VLjፌ‫ٷ‬ኵ VLjፌၭኵ VLjፌၭኵ VLjፌ‫ٷ‬ኵ ‫ۉ‬ᇸᄲ൱7 ‫ۉ‬ᇸ‫ۉ‬უ AVDD ዁ GND 2.7/5.25 DVDD ዁ GND 2.7/5.25 VLjፌၭኵ /ፌ‫ٷ‬ኵ VLjፌၭኵ /ፌ‫ٷ‬ኵ ‫ۉ‬ᇸ‫ୁۉ‬ IDD‫ୁۉ‬ IDD)ู‫ۉ‬ఇ๕* 1 140 μALjፌ‫ٷ‬ኵ 185 μALjፌ‫ٷ‬ኵ 400 μALjፌ‫ٷ‬ኵ 500 μALjፌ‫ٷ‬ኵ 1 2 μALjፌ‫ٷ‬ኵ μALjፌ‫ٷ‬ኵ ֪๬ཉॲ/ጀ๥ DVDD = 3 V, ISOURCE = 100 μA DVDD = 3 V, ISINK = 100 μA DVDD = 5 V, ISOURCE = 200 μA DVDD = 5 V, ISINK = 1.6 mA (DOUT/RDY), 800 μA (CLK) ‫ۆ‬႙ኵ110 μA (AVDD = 3 V)Lj‫ۆ‬႙ኵ125 μA (AVDD = 5 V)Lj ࿮࣐؋ఇ๕Ljྔևएጚ‫ۉ‬უ ‫ۆ‬႙ኵ130 μA (AVDD = 3 V)Lj‫ۆ‬႙ኵ165 μA (AVDD = 5 V)Lj ࣐؋ఇ๕Ljሺᅮ = 1ई2Ljྔևएጚ‫ۉ‬უ ‫ۆ‬႙ኵ300 μA (AVDD = 3 V)Lj‫ۆ‬႙ኵ350 μA (AVDD = 5 V)Lj ሺᅮ = 4዁128Ljྔևएጚ‫ۉ‬უ ‫ۆ‬႙ኵ400 μA (AVDD = 3 V)Lj‫ۆ‬႙ኵ450 μA (AVDD = 5 V)Lj ሺᅮ = 4዁128Ljాևएጚ‫ۉ‬უ AD7794B, AD7795B AD7794C ࿒‫ྷݔ܈‬ǖ−40°C዁+105°C)Bप*Lj−40°C዁+125°C)Cप*ă߸ႎ໏୲ྺ19.6 Hzࢅ39.2 Hz้LjසࡕAIN(+)ईAIN(−)ᆅগฉ‫ۉڦ‬უ‫ۆ‬႙ኵ‫ࡗג‬AVDD – 1.6 VLjሶ! ! INLĂ‫ۉ‬ᇸᅞ዆(PSR)Ăࠌఇᅞ዆(CMR)ࢅ‫׉‬ఇᅞ዆(NMR)փ‫ࢇޙ‬ຕ਍๮֩रຍࡀ߭ăُྔLjቘհ্ᆩ้Ljኄၵ߸ႎ໏୲ူ‫ڦ‬฿ۙဃֶࢅ฿ۙဃֶ೏ᅎႠీࣷ! ! ူইăਉ૩ܸჾLj‫ۉُࡗג‬უ้LjINL‫ۆ‬႙ኵই዁஢ଉ‫ڦײ‬18 ppmLjPSR‫ۆ‬႙ኵই዁69 dBăᅺُLjྺԍኤኄၵ߸ႎ໏୲ူ‫ڦ‬ႠీLjఇె๼෇ᆅগฉ‫ڦ‬ਨ‫!ܔ‬ ! ‫!ۉ‬უՂႷ‫گ‬ᇀAVDD − 1.6 Vă 2 रຍࡀ߭࿄ঢ়ิׂ֪๬Lj‫ڍ‬๴ׂ೗‫؛‬๔݀ք้‫ڦ‬༬Ⴀຕ਍ኧ‫׼‬ă 3 ၯጚኮࢫLjُဃֶᇑ჋ۨ‫ڦ‬Պ‫ײ‬ሺᅮࢅ߸ႎ໏୲໯‫ܔ‬ᆌ‫ڦ‬ሯำ၎‫ړ‬ă 4 ሞඪᅪ࿒‫ူ܈‬ዘႎၯጚॽၩ‫أ‬ኄၵဃֶă 5 ஢ଉ‫ײ‬ဃֶ๢ᆩᇀኟ޶ଇዖ஢ଉ‫ײ‬Ljժሞ߾‫׍‬ၯጚཉॲူ๢ᆩDŽAVDD = 4 VLjሺᅮ = 1LjTA = 25°CDžă 6 FS[3:0]ྺఇ๕स٪ഗዐᆩઠ჋ስ๼‫؜‬ጴ໏୲‫຺ڦ‬࿋ă 7 ্ᆩघ૤‫ࢅୁۉ‬ೋዃ‫ۉ‬უ݀ิഗ้Ljຕጴ๼෇‫ڪ‬ᇀDVDDईGNDă Rev. D | Page 7 of 36 AD7794/AD7795 ้Ⴞ༬Ⴀ ‫ݥأ‬ଷᆶຫ௽LjAVDD = 2.7 V዁5.25 VLjDVDD = 2.7 V዁5.25 VLjGND = 0 VLj๼෇இड0 = 0 VLj๼෇இड1 = DVDDă ՗2 ֖ຕ1,2 t3 t4 ‫܁‬ൽ֡ፕ t1 t2 3 t5 5, 6 t6 t7 ႀ෇֡ፕ t8 t9 t10 t11 TMINĂTMAX้‫ڦ‬၌ኵ(Bप) 100 100 ‫ڇ‬࿋ ns(ፌၭኵ) ns(ፌၭኵ) ཉॲ/ጀ๥ SCLKߛ‫ۉ‬ೝஞ؋੻‫܈‬ SCLK‫ۉگ‬ೝஞ؋੻‫܈‬ 0 60 80 0 60 80 10 80 0 10 ns(ፌၭኵ) ns(ፌ‫ٷ‬ኵ) ns(ፌ‫ٷ‬ኵ) ns(ፌၭኵ) ns(ፌ‫ٷ‬ኵ) ns(ፌ‫ٷ‬ኵ) ns(ፌၭኵ) ns(ፌ‫ٷ‬ኵ) ns(ፌၭኵ) ns(ፌၭኵ) CS ူইᄂ‫ڟ‬DOUT/ RDYᆶၳ้क़ DVDD = 4.75 V ዁ 5.25 V DVDD = 2.7 V ዁ 3.6 V SCLKᆶၳᄂ‫ڟ‬ຕ਍ᆶၳჽ‫׿‬4 DVDD = 4.75 V ዁ 5.25 V DVDD = 2.7 V ዁ 3.6 V CS ࿮ၳᄂࢫ‫ڦ‬ጺ၍๥‫้ݣ‬क़ 0 30 25 0 ns(ፌၭኵ) ns(ፌၭኵ) ns(ፌၭኵ) ns(ፌၭኵ) CS ူইᄂ‫ڟ‬SCLKᆶၳᄂยዃ้क़4 ຕ਍ᆶၳ‫ڟ‬SCLKᄂยዃ้क़ ຕ਍ᆶၳ‫ڟ‬SCLKᄂԍ‫้׼‬क़ CS ฉืᄂ‫ڟ‬SCLKᄂԍ‫้׼‬क़ SCLK࿮ၳᄂ‫ ڟ‬CS ࿮ၳᄂ SCLK࿮ၳᄂ‫ڟ‬DOUT/ RDY ߛ‫ۉ‬ೝ 1 ᄣೌሞ‫ْ݀؛‬ք೺क़਩ঢ়ࡗ֪๬Ljᅜඓԍ‫ࢇޙ‬Քጚᄲ൱ă໯ᆶ๼෇႑ࡽ਩ኸۨtR = tF = 5 nsDŽ10%‫ڟ‬90%‫ڦ‬DVDDDžLjժٗ1.6 V‫ۉ‬ೝഐਸ๔ऺ้ă 2 ֖९཮3ࢅ཮4ă 3 ኄၵຕኵ๟֑ᆩ཮2໯๖޶ሜ‫ۉ‬ୟ‫֪ڦ‬ଉ঳ࡕLjۨᅭྺ๼‫ੵ؜‬ሁVOLईVOH၌ኵ໯Ⴔ‫้ڦ‬क़ă 4 SCLKᆶၳᄂྺSCLK‫ူڦ‬ইᄂă 5 ኄၵຕኵઠᇸᇀ֪ଉ้क़Lj޿้क़ྺ֑ᆩ཮2໯๖޶ሜ‫ۉ‬ୟ้ຕ਍๼‫߀؜‬Վ0.5 V໯Ⴔ‫้ڦ‬क़ă඗ࢫॽ֪‫ڦڥ‬ຕኵ‫ݒ‬ၠྔླྀLjᅜၩ‫أ‬50 pF‫ۉ‬ඹ‫ڦ‬؊‫ۉ‬ई‫!ۉݣ‬ ! ၳᆌăኄᅪ࿆ጣLj้Ⴞ༬Ⴀ໯ߴ‫้ڦ؜‬क़๟޿ഗॲኈኟ‫ڦ‬ጺ၍๥‫้ݣ‬क़Ljᅺܸᇑྔևጺ၍޶ሜ‫ۉ‬ඹ࿮࠲ă RDYሞ‫܁‬ൽADCኮࢫ‫ۉߛ࣮ݓ‬ೝăሞ‫ْڇ‬ገ࣑ఇ๕ࢅ૶Ⴤገ࣑ఇ๕ူLj‫ړ‬RDYྺߛ‫ۉ‬ೝ้LjසࡕႴᄲLj੗ᅜምْ‫܁‬ൽཞᅃຕ਍Lj‫ڍ‬ᆌඓԍࢫჄ‫܁‬ൽ֡ፕ‫ิ݀ڦ‬ ้क़!! փీথৎူᅃْ๼‫߸؜‬ႎ้क़ă૶Ⴤ‫܁‬ൽఇ๕ူLjຕጴጴኻీԥ‫܁‬ൽᅃْă ISINK (1.6mA WITH DVDD = 5V, 100μA WITH DVDD = 3V) TO OUTPUT PIN 1.6V 50pF ISOURCE (200μA WITH DVDD = 5V, 100μA WITH DVDD = 3V) ཮ 2. ้Ⴞ༬Ⴀ‫޶ڦ‬ሜ‫ۉ‬ୟ Rev. D | Page 8 of 36 04854-002 6 AD7794/AD7795  ้Ⴞ཮ CS (I) t6 t1 t5 MSB DOUT/RDY (O) LSB t7 t2 t3 04854-003 SCLK (I) t4 I = INPUT, O = OUTPUT ཮3. ‫܁‬ൽዜ೺้Ⴞ཮ CS (I) t11 t8 SCLK (I) t9 t10 MSB I = INPUT, O = OUTPUT ཮4. ႀ෇ዜ೺้Ⴞ཮ Rev. D | Page 9 of 36 LSB 04854-004 DIN (I) AD7794/AD7795 ਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ ‫ݥأ‬ଷᆶຫ௽LjTA = 25°Că ՗3 ጀᅪLj‫؜ג‬ฉຎਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ੗ీࣷ‫ڞ‬ዂഗॲᆦ৳Ⴀ໦ ࣋ăኄኻ๟‫ۨܮ‬ᆌ૰ኵLjփᅪ࿆ጣഗॲሞኄၵईኁඪࢆഄ ໲‫؜ג‬Ԩरຍࡀ߭ກ‫ీࠀڦ‬Ⴀ֡ፕቤব૛Ք௽‫ڦ‬ཉॲူ‫ڦ‬ ࠀీႠ֡ፕă‫׊‬೺ሞਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵཉॲူ߾ፕࣷᆖၚഗ ॲ‫ڦ‬੗੍Ⴀă ֖ຕ!! ‫ۨܮ‬ኵ!! AV DD ዁GND −0.3 V ዁+7 V DV DD ዁GND −0.3 V ዁+7 V ఇె๼෇‫ۉ‬უ዁GND −0.3 V ዁AV DD + 0.3 V एጚ๼෇‫ۉ‬უ዁GND −0.3 V ዁AV DD + 0.3 V ຕጴ๼෇‫ۉ‬უ዁GND −0.3 V ዁DV DD + 0.3 V ຕጴ๼‫ۉ؜‬უ዁GND −0.3 V ዁DV DD + 0.3 V ৑࠶Ԩׂ೗ਏᆶጆ૧ईጆᆶԍࢺ‫ۉ‬ୟLj‫ڍ‬ሞᇜ‫ీߛڟ‬ AIN/ ຕጴ๼෇‫ୁۉ‬ 10 mA ଉFTE้Ljഗॲ੗ీࣷ໦࣋ăᅺُLjᆌ‫֑ړ‬ൽ๢‫ڦړ‬ ESDয়ߢ ESD)ৢ‫ߌ௺*ۉݣۉ‬ഗॲă ‫ۉټ‬ഗॲࢅ‫ۉ‬ୟӱ੗ీࣷሞுᆶִਥ‫ڦ‬൧઄ူ‫ۉݣ‬ă ߾ፕ࿒‫ྷݔ܈‬ FTE‫ٯݔݞ‬แLjᅜՆ௨ഗॲႠీူইईࠀీෟ฿ă Bप −40°C ዁+105°C Cप −40°C ዁+125°C ٪‫ئ‬࿒‫ྷݔ܈‬ −65°C ዁+150°C ፌߛ঳࿒ 150°C TSSOP θJA ඤፆੇ 97.9°C/W θJC ඤፆੇ 14°C/W ᆅগ࿒‫܈‬Ljࡰথ ഘ၎DŽ60௱Dž 215°C ࢤྔDŽ15௱Dž 220°C Rev. D | Page 10 of 36 AD7794/AD7795 ᆅগದዃࢅࠀీ௮ຎ SCLK 1 24 DIN CLK 2 23 DOUT/RDY CS 3 NC 4 AIN6(+)/P1 5 AD7794/ AD7795 21 AVDD 20 GND 19 PSW TOP VIEW AIN1(+) 7 (Not to Scale) 18 AIN4(–)/REFIN2(–) AIN1(–) 8 17 AIN4(+)/REFIN2(+) AIN2(+) 9 16 AIN5(–)/IOUT1 AIN2(–) 10 15 AIN5(+)/IOUT2 AIN3(+) 11 14 REFIN1(–) AIN3(–) 12 13 REFIN1(+) NC = NO CONNECT 04854-005 AIN6(–)/P2 6 22 DVDD ཮5. ᆅগದዃ ՗4. ᆅগࠀీ௮ຎ ᆅগՊࡽ ᆅগఁ‫׬‬ 1 SCLK ௮ຎ ‫ز‬ႜ้ዓ๼෇ăᆩᇀઠྫADC‫ڦ‬ຕ਍‫د‬๼ăSCLKਏᆶแ௢༬‫݀ة‬๕๼෇Ljᅺܸ޿থ੨๢ࢇ࠼߰૗ᆌ ᆩă޿‫ز‬ႜ้ዓ੗ᅜ๟૶Ⴤ๕้ዓLj໯ᆶຕ਍਩ሞ૶Ⴤ‫ڦ‬ஞ؋‫ز‬ዐ‫د‬๼ăईኁLj໲ᄺ੗ᅜ๟‫૶ݥ‬Ⴤ ๕้ዓLjઠྫADC‫ڦ‬႑တᅜডၭ‫ڦ‬ຕ਍Ԉႚ๕‫د‬๼ă 2 CLK ้ዓ๼෇/้ዓ๼‫؜‬ăཚࡗُᆅগ੗༵ࠃాև้ዓăईኁLj੗্ᆩాև้ዓLjժ֑ᆩྔև้ዓൻ‫޿ۯ‬ ADCăኄᄣLj‫߲ܠ‬ADC੗ᅜ֑ᆩཞᅃ้ዓൻ‫ۯ‬Ljܸٗኴႜཞօገ࣑ă 3 CS ೌ჋๼෇ăኄ๟ᅃ߲‫ۉگ‬ೝᆶၳஇड๼෇Ljᆩᇀ჋ስADCăCS੗ᅜᆩઠሞ‫ز‬ႜጺ၍ฉਏᆶ‫߲ܠ‬ഗॲ‫ڦ‬ ဣཥዐ჋ስADCLjईኁᆩፕኡཞօ႑ࡽᇑഗॲཚ႑ăCS੗ᅜᆩᆘ૶၍‫ݛ‬๕ዃྺ‫ۉگ‬ೝLj๑‫ڥ‬ADCీᅜ3 ၍๕ఇ๕߾ፕLj๑ᆩSCLKĂDINࢅDOUTᇑഗॲথ੨ă 4 5 NC AIN6(+)/P1 6 AIN6(−)/P2 7 8 9 10 11 12 13 AIN1(+) AIN1(−) AIN2(+) AIN2(−) AIN3(+) AIN3(−) REFIN1(+) 14 15 REFIN1(−) AIN5(+)/IOUT2 փ૶থă ఇె๼෇/ຕጴ๼‫؜‬ᆅগăAIN6(+)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN6(+)/AIN6(−)‫ڦ‬ኟ‫܋‬ăُᆅগᄺ੗ᅜᆩፕཚᆩ ๼‫؜‬࿋LjᅜAVDDᇑGNDኮक़‫ۉڦ‬უྺएጚă ఇె๼෇/ຕጴ๼‫؜‬ᆅগăAIN6(-)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN6(+)/AIN6(−)‫܋޶ڦ‬ăُᆅগᄺ੗ᅜᆩፕཚᆩ๼ ‫؜‬࿋LjᅜAVDDᇑGNDኮक़‫ۉڦ‬უྺएጚă ఇె๼෇ăAIN1(+)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN1(+)/AIN1(−)‫ڦ‬ኟ‫܋‬ă ఇె๼෇ăAIN1(-)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN1(+)/AIN1(−)‫܋޶ڦ‬ă ఇె๼෇ăAIN2(+)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN2(+)/AIN2(−)‫ڦ‬ኟ‫܋‬ă ఇె๼෇ăAIN2(-)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN2(+)/AIN2(−)‫܋޶ڦ‬ă ఇె๼෇ăAIN3(+)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN3(+)/AIN3(−)‫ڦ‬ኟ‫܋‬ă ఇె๼෇ăAIN3(-)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN3(+)/AIN3(−)‫܋޶ڦ‬ă ኟएጚ‫ۉ‬უ๼෇ă੗ᅜሞREFIN1(+)ᇑREFIN1(−)ኮक़แेᅃ߲ྔևएጚ‫ۉ‬უăREFIN1(+)੗ᅜ๟AVDDᇑ GND + 0.1 Vኮक़‫ڦ‬ඪᅪኵăՔ‫׬‬एጚ‫ۉ‬უ(REFIN1(+) − REFIN1(−))ྺ2.5 VLj‫޿ڍ‬ഗॲ੗ᅜ֑ᆩ0.1 V዁ AVDD‫ڦాྷݔ‬एጚ‫ۉ‬უ߾ፕă ޶एጚ‫ۉ‬უ๼෇ăُएጚ‫ۉ‬უ๼෇੗ᅜ๟GNDᇑAVDD - 0.1 Vኮक़‫ڦ‬ඪᅪኵă ాևघ૤‫ୁۉ‬ᇸ‫ڦ‬ఇె๼෇/๼‫؜‬ăAIN5(+)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN5(+)/AIN5(−)‫ڦ‬ኟ‫܋‬ăईኁLjాևघ ૤‫ୁۉ‬ᇸ੗ᅜཚࡗُᆅগ༵ࠃLjժ൐๟੗Պ‫ڦײ‬LjᅜՍ༵ࠃ10 μAĂ210 μAई1 mA‫ୁۉ‬ă੗ᅜॽIEXC1 ईIEXC2ൎ࣑዁ُ๼‫؜‬ă 16 AIN5(−)/IOUT1 17 AIN4(+)/REFIN2(+) ఇె๼෇/ኟएጚ‫ۉ‬უ๼෇ăAIN4(+)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN4(+)/AIN4(−)‫ڦ‬ኟ‫܋‬ăُᆅগᄺ੗ᅜᆩፕ REFIN2‫ڦ‬ኟएጚ‫ۉ‬უ๼෇ăREFIN2(+)੗ᅜ๟AVDDᇑGND + 0.1 Vኮक़‫ڦ‬ඪᅪኵăՔ‫׬‬एጚ‫ۉ‬უ )REFIN2(+)዁REFIN2(−)*ྺ2.5 VLj‫޿ڍ‬ഗॲ੗ᅜ֑ᆩ0.1 V዁AVDD‫ڦాྷݔ‬एጚ‫ۉ‬უ߾ፕă ాևघ૤‫ୁۉ‬ᇸ‫ڦ‬ఇె๼෇/๼‫؜‬ăAIN5(-)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN5(+)/AIN5(−)‫܋޶ڦ‬ăईኁLjాևघ ૤‫ୁۉ‬ᇸ੗ᅜཚࡗُᆅগ༵ࠃLjժ൐๟੗Պ‫ڦײ‬LjᅜՍ༵ࠃ10 μAĂ210 μAई1 mA‫ୁۉ‬ă੗ᅜॽIEXC1 ईIEXC2ൎ࣑዁ُ๼‫؜‬ă Rev. D | Page 11 of 36 AD7794/AD7795  ᆅগՊࡽ ᆅগఁ‫׬‬ ௮ຎ 18 AIN4(−)/REFIN2(−) ఇె๼෇/޶एጚ‫ۉ‬უ๼෇ăAIN4(−)๟ֶ‫ݴ‬ఇె๼෇‫ܔ‬AIN4(+)/AIN4(−)‫܋޶ڦ‬ăُᆅগᄺ੗ᅜᆩፕ REFIN2‫޶ڦ‬एጚ‫ۉ‬უ๼෇ăُएጚ‫ۉ‬უ๼෇੗ᅜ๟GNDᇑAVDD - 0.1 Vኮक़‫ڦ‬ඪᅪኵă 19 20 21 22 PSW GND AVDD DVDD 23 DOUT/RDY 24 DIN ‫ۉ܋گ‬ᇸਸ࠲LjথGNDă থ‫ں‬एጚ‫ۅ‬ă ‫ۉ‬ᇸ‫ۉ‬უLj2.7 V዁5.25 Vă ‫ز‬ႜথ੨‫ۉ‬ᇸ‫ۉ‬უLj2.7 V዁5.25 VăDVDD‫܀‬૬ᇀAVDDăᅺُLj‫ز‬ႜথ੨߾ፕሞ3 VLjܸAVDDྺ5 VLj ईኁ၎‫ݒ‬ă ‫ز‬ႜຕ਍๼‫؜‬/ຕ਍৽Ⴣ๼‫؜‬ăDOUT/RDYਏᆶມዘፕᆩă໲੗ᅜᆩፕ‫ز‬ႜຕ਍๼‫؜‬ᆅগLjᅜ‫ݡ‬࿚ADC‫ڦ‬ ๼‫؜‬ᅎ࿋स٪ഗă๼‫؜‬ᅎ࿋स٪ഗ੗ᅜࡤᆶઠጲඪᅃೌాຕ਍स٪ഗई੦዆स٪ഗ‫ڦ‬ຕ਍ăُྔLj DOUT/RDY੗ᅜᆩፕຕ਍৽ჃᆅগLjՎྺ‫ۉگ‬ೝ้՗๖ገ࣑ᅙྜ‫ׯ‬ăገ࣑ྜ‫ࢫׯ‬Ljසࡕຕ਍࿄ԥ‫܁‬ൽLj ޿ᆅগॽሞူᅃْ߸ႎ݀ิኮമՎྺߛ‫ۉ‬ೝăDOUT/RDYူইᄂᄺ੗ᅜᆩፕ‫ت‬૙ഗ‫ڦ‬ዐ܏Lj՗๖٪ሞ੗ ᆩ‫ڦ‬ᆶၳຕ਍ă֑ᆩྔև‫ز‬ႜ้ዓ้Lj੗ᅜ૧ᆩDOUT/RDYᆅগ‫܁‬ൽຕ਍ăCSྺ‫ۉگ‬ೝ้Ljຕ਍/੦዆ጴ႑ တሞSCLKူইᄂዃᇀDOUT/RDYᆅগฉLjሞSCLKฉืᄂᆶၳă ADC๼෇ᅎ࿋स٪ഗ‫زڦ‬ႜຕ਍๼෇ă޿ᅎ࿋स٪ഗዐ‫ڦ‬ຕ਍‫د‬๼዁ADCా‫ڦ‬੦዆स٪ഗLjཚ႑स ٪ഗ‫ڦ‬स٪ഗ჋ስ࿋ඓۨ๢‫ڦړ‬स٪ഗă Rev. D | Page 12 of 36 AD7794/AD7795  ਩‫ߵݛ‬ሯำᇑ‫ݴ‬Ր୲༬Ⴀ! AD7794/AD7795੗ᅜ߾ፕሞቘհ๑ీईቘհ্ᆩఇ๕ူLj ܸٗํ၄ፌॅൎ้࣑क़ई೏ᅎႠీăቘհ๑ీ้Ljॺ૬้ क़ྺገ้࣑क़‫ڦ‬ଇԠă‫ڍ‬๟LjADCࣷ‫׼‬Ⴤၩ‫أ‬฿ۙLj๑‫ڥ‬ ฿ۙࢅ฿ۙ೏ᅎ࢔‫گ‬ăቘհ্ᆩ้LjඹႹ‫߸ڦ‬ႎ໏୲ᇑቘ հ๑ీఇ๕၎ཞă‫ڍ‬๟Ljُ้ॺ૬้क़ᇑገ้࣑क़၎‫ڪ‬ă ቘհ্ᆩ้LjADCփࣷၩ‫أ‬฿ۙLjᅺُ੗ీႴᄲۨ೺ኴႜ ฿ۙၯጚLjᅜၩ‫أ‬೏ᅎᆅഐ‫ڦ‬฿ۙă ቘհ๑ీ! ྔևएጚ‫ۉ‬უ ՗5ߴ‫؜‬କᅃၵ߸ႎ໏୲ࢅሺᅮยዃူ‫ڦ‬AD7794/AD7795 ਩‫ߵݛ‬ሯำă໯༵ࠃ‫ڦ‬ຕ਍๟ኍ‫ܔ‬ມटႠ๼෇‫ྷݔ‬ᅜत֑ ᆩ2.5 Vྔևएጚ‫ۉ‬უᇸܸჾăኄၵຕ਍ྺ‫ۆ‬႙ኵLj๟ሞֶ ‫ݴ‬๼෇‫ۉ‬უྺ0 V‫ڦڟڥࢪ้ڦ‬ă ՗6ࢅ՗7ߴ‫؜‬କᆶၳ‫ݴ‬Ր୲Lj๼‫ރރ؜‬ኵ(p-p)‫ݴ‬Ր୲ሶଚ ᇀઔࡽዐăՂႷጀᅪLjᆶၳ‫ݴ‬Ր୲๟૧ᆩ਩‫ߵݛ‬ሯำऺ໙ ‫؜ڥ‬Ljܸ‫ރރ‬ኵ‫ݴ‬Ր୲ሶ๟ߵ਍‫ރރ‬ኵሯำऺ໙‫؜ڥ‬ă‫ރ‬ ‫ރ‬ኵ‫ݴ‬Ր୲՗๖࿮ஓ෻ຮ൧઄ူ‫ݴڦ‬Ր୲ăኄၵຕ਍ྺ‫ۆ‬ ႙ኵLjᅙ຺ป࿵෇‫ڟ‬ፌথৎ‫ڦ‬LSBă ՗5. ਩‫ߵݛ‬ሯำ(μV)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ(֑ᆩ2.5 Vྔևएጚ‫ۉ‬უᇸLjቘհ๑ీ) ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 0.64 1.04 1.55 2.3 2.95 4.89 11.76 11.33 G=2 0.6 0.96 1.45 2.13 2.85 4.74 9.5 9.44 G=4 0.29 0.38 0.54 0.74 0.92 1.49 4.02 3.07 G=8 0.22 0.26 0.36 0.5 0.58 1 1.96 1.79 G = 16 0.1 0.13 0.18 0.23 0.29 0.48 0.88 0.99 G = 32 0.065 0.078 0.11 0.17 0.2 0.32 0.45 0.63 G = 64 0.039 0.057 0.087 0.124 0.153 0.265 0.379 0.568 G = 128 0.041 0.055 0.086 0.118 0.144 0.283 0.397 0.593 G = 64 21 (18.5) 20.5 (18) 20 (17.5) 19 (16.5) 19 (16.5) 18 (15.5) 17.5 (15) 17 (14.5) G = 128 20 (17.5) 19.5 (17) 19 (16.5) 18.5 (16) 18 (15.5) 17 (14.5) 16.5 (14) 16 (13.5) G = 64 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (15) 16 (14.5) G = 128 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (14.5) 16 (14) 16 (13.5) ՗6. AD7794ᆶၳ‫ݴ‬Ր୲(࿋)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ(֑ᆩ2.5 Vྔևएጚ‫ۉ‬უᇸLjቘհ๑ీ) ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 23 (20.5) 22 (19.5) 21.5 (19) 21 (18.5) 20.5 (18) 20 (17.5) 18.5 (16) 18.5 (16) G=2 22 (19.5) 21.5 (19) 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 18 (15.5) 18 (15.5) G=4 22 (19.5) 21.5 (19) 21 (18.5) 20.5 (18) 20.5 (18) 19.5 (17) 18 (15.5) 18.5 (16) G=8 21.5 (19) 21 (18.5) 20.5 (18) 20 (17.5) 20 (17.5) 19 (16.5) 18 (15.5) 18.5 (16) G = 16 21.5 (19) 21 (18.5) 20.5 (18) 20.5 (18) 20 (17.5) 19.5 (17) 18.5 (16) 18 (15.5) G = 32 21 (18.5) 21 (18.5) 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 18.5 (16) 18 (15.5) ՗7. AD7795ᆶၳ‫ݴ‬Ր୲(࿋)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ(֑ᆩ2.5 Vྔևएጚ‫ۉ‬უᇸLjቘհ๑ీ) ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) G=2 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (15.5) G=4 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (16) G=8 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (16) G = 16 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) Rev. D | Page 13 of 36 G = 32 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) AD7794/AD7795  ాևएጚ‫ۉ‬უ ՗8ߴ‫؜‬କᅃၵ߸ႎ໏୲ࢅሺᅮยዃူ‫ڦ‬AD7794/AD7795 ਩‫ߵݛ‬ሯำă໯༵ࠃ‫ڦ‬ຕ਍๟ኍ‫ܔ‬ມटႠ๼෇‫ྷݔ‬ᅜत֑ ᆩ1.17 Vాևएጚ‫ۉ‬უᇸܸჾăኄၵຕ਍ྺ‫ۆ‬႙ኵLj๟ሞֶ ‫ݴ‬๼෇‫ۉ‬უྺ0 V‫ڦڟڥࢪ้ڦ‬ă՗9ࢅ՗10ߴ‫؜‬କᆶၳ‫ݴ‬ Ր୲Lj๼‫ރރ؜‬ኵ(p-p)‫ݴ‬Ր୲ሶଚᇀઔࡽዐă ՂႷጀᅪLjᆶၳ‫ݴ‬Ր୲๟૧ᆩ਩‫ߵݛ‬ሯำऺ໙‫؜ڥ‬Ljܸ‫ރ‬ ‫ރ‬ኵ‫ݴ‬Ր୲ሶ๟ߵ਍‫ރރ‬ኵሯำऺ໙‫؜ڥ‬ă‫ރރ‬ኵ‫ݴ‬Ր୲ ՗๖࿮ஓ෻ຮ൧઄ူ‫ݴڦ‬Ր୲ăኄၵຕ਍ྺ‫ۆ‬႙ኵLjᅙ຺ ป࿵෇‫ڟ‬ፌথৎ‫ڦ‬LSBă ՗8. ਩‫ߵݛ‬ሯำ(μV)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ(֑ᆩ1.17 Vాևएጚ‫ۉ‬უᇸLjቘհ๑ీDž ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 0.81 1.18 1.96 2.99 3.6 5.83 11.22 12.46 G=2 0.67 1.11 1.72 2.48 3.25 5.01 8.64 10.58 G=4 0.32 0.41 0.55 0.83 1.03 1.69 2.69 4.58 G=8 0.2 0.25 0.36 0.48 0.65 0.96 1.9 2 G = 16 0.13 0.16 0.25 0.33 0.46 0.67 1.04 1.27 G = 32 0.065 0.078 0.11 0.17 0.2 0.32 0.45 0.63 G = 64 0.04 0.058 0.088 0.13 0.15 0.25 0.35 0.50 G = 128 0.039 0.059 0.088 0.12 0.15 0.26 0.34 0.49 G = 64 20 (17.5) 19 (16.5) 18.5 (16) 18 (15.5) 18 (15.5) 17 (14.5) 16.5 (14) 16 (13.5) G = 128 19 (16.5) 18 (15.5) 17.5 (15) 17 (14.5) 17 (14.5) 16 (13.5) 15.5 (13) 15 (12.5) G = 64 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (15.5) 16 (14.5) 16 (14) 16 (13.5) G = 128 16 (16) 16 (15.5) 16 (15) 16 (14.5) 16 (14.5) 16 (13.5) 15.5 (13) 15 (12.5) ՗9. AD7794ᆶၳ‫ݴ‬Ր୲(࿋)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ(֑ᆩ1.17 Vాևएጚ‫ۉ‬უᇸLjቘհ๑ీ) ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 21.5 (19) 21 (18.5) 20 (17.5) 19.5 (17) 19.5 (17) 18.5 (16) 17.5 (15) 17.5 (15) G=2 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 18.5 (16) 18 (15.5) 17 (14.5) 17 (14.5) G=4 21 (18.5) 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 18.5 (16) 17.5 (15) 17 (14.5) G=8 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 19 (16.5) 18 (15.5) 17 (14.5) 17 (14.5) G = 16 20 (17.5) 20 (17.5) 19 (16.5) 19 (16.5) 18.5 (16) 17.5 (15) 17 (14.5) 17 (14.5) G = 32 20 (17.5) 20 (17.5) 19.5 (17) 18.5 (16) 18.5 (16) 18 (15.5) 17.5 (15) 17 (14.5) ՗10. AD7795ᆶၳ‫ݴ‬Ր୲(࿋)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ(֑ᆩ1.17 Vాևएጚ‫ۉ‬უᇸLjቘհ๑ీ) ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15) 16 (15) G=2 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (14.5) 16 (14.5) G=4 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15) 16 (14.5) G=8 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (14.5) 16 (14.5) G = 16 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15) 16 (14.5) 16 (14.5) Rev. D | Page 14 of 36 G = 32 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (15) 16 (14.5) AD7794/AD7795  ቘհ্ᆩ! ቘհ্ᆩ้Ljൎ้࣑क़ईॺ૬้क़໫‫܌‬2Ԡă‫ڍ‬๟Ljُ้ ੗ీႴᄲۨ೺ኴႜ฿ۙၯጚLjᅜၩ‫أ‬฿ۙࢅ฿ۙ೏ᅎăቘ հ্ᆩ้Ljఇ๕स٪ഗዐ‫ڦ‬AMP-CM࿋ᆌዃ1Ljኄࣷ၌዆ ੗ᆩ‫ڦ‬ඹႹࠌఇ‫ۉ‬უăසࡕُ࿋փዃ1Ljࠌఇᅞ዆Ⴀీࣷ ူইă ໯༵ࠃ‫ڦ‬ຕ਍๟ኍ‫ܔ‬ມटႠ๼෇‫ྷݔ‬ᅜत֑ᆩ1.17 Vాև एጚ‫ۉ‬უᇸܸჾăኄၵຕ਍ྺ‫ۆ‬႙ኵLj๟ሞֶ‫ݴ‬๼෇‫ۉ‬უ ྺ0 V‫ڦڟڥࢪ้ڦ‬ă ՗12ࢅ՗13ߴ‫؜‬କᆶၳ‫ݴ‬Ր୲Lj๼‫ރރ؜‬ኵ(p-p)‫ݴ‬Ր୲ሶ ଚᇀઔࡽዐăՂႷጀᅪLjᆶၳ‫ݴ‬Ր୲๟૧ᆩ਩‫ߵݛ‬ሯำऺ ໙‫؜ڥ‬Ljܸ‫ރރ‬ኵ‫ݴ‬Ր୲ሶ๟ߵ਍‫ރރ‬ኵሯำऺ໙‫؜ڥ‬ă ‫ރރ‬ኵ‫ݴ‬Ր୲՗๖࿮ஓ෻ຮ൧઄ူ‫ݴڦ‬Ր୲ăኄၵຕ਍ྺ ‫ۆ‬႙ኵLjᅙ຺ป࿵෇‫ڟ‬ፌথৎ‫ڦ‬LSBă ՗ 11ߴ ‫ ؜‬କ ቘ հ ্ ᆩ ้ ᅃ ၵ ߸ ႎ ໏ ୲ ࢅ ሺ ᅮ ย ዃ ူ ‫ڦ‬ AD7794/AD7795਩‫ߵݛ‬ሯำă ՗11. ਩‫ߵݛ‬ሯำ(μV)ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ)֑ᆩ1.17 Vాևएጚ‫ۉ‬უᇸLjቘհ্ᆩDž ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 0.64 1.04 1.55 2.3 2.95 4.89 11.76 11.33 G=2 0.6 0.96 1.45 2.13 2.85 4.74 9.5 9.44 G=4 0.29 0.38 0.54 0.74 0.92 1.49 4.02 3.07 G=8 0.22 0.26 0.36 0.5 0.58 1 1.96 1.79 G = 16 0.1 0.13 0.18 0.23 0.29 0.48 0.88 0.99 G = 32 0.065 0.078 0.11 0.17 0.2 0.32 0.45 0.63 G = 64 0.039 0.057 0.087 0.124 0.153 0.265 0.379 0.568 G = 128 0.041 0.055 0.086 0.118 0.144 0.283 0.397 0.593 ՗12. AD7794ᆶၳ‫ݴ‬Ր୲)࿋*ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ)֑ᆩ1.17 Vాևएጚ‫ۉ‬უᇸLjቘհ্ᆩDž ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 23 (20.5) 22 (19.5) 21.5 (19) 21 (18.5) 20.5 (18) 20 (17.5) 18.5 (16) 18.5 (16) G=2 22 (19.5) 21.5 (19) 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 18 (15.5) 18 (15.5) G=4 22 (19.5) 21.5 (19) 21 (18.5) 20.5 (18) 20.5 (18) 19.5 (17) 18 (15.5) 18.5 (16) G=8 21.5 (19) 21 (18.5) 20.5 (18) 20 (17.5) 20 (17.5) 19 (16.5) 18 (15.5) 18.5 (16) G = 16 21.5 (19) 21 (18.5) 20.5 (18) 20.5 (18) 20 (17.5) 19.5 (17) 18.5 (16) 18 (15.5) G = 32 21 (18.5) 21 (18.5) 20.5 (18) 20 (17.5) 19.5 (17) 19 (16.5) 18.5 (16) 18 (15.5) G = 64 21 (18.5) 20.5 (18) 20 (17.5) 19 (16.5) 19 (16.5) 18 (15.5) 17.5 (15) 17 (14.5) G = 128 20 (17.5) 19.5 (17) 19 (16.5) 18.5 (16) 18 (15.5) 17 (14.5) 16.5 (14) 16 (13.5) ՗13. AD7795ᆶၳ‫ݴ‬Ր୲)࿋*ᇑሺᅮࢅ๼‫߸؜‬ႎ໏୲‫࠲ڦ‬ဣ)֑ᆩ1.17 Vాևएጚ‫ۉ‬უᇸLjቘհ্ᆩDž ߸ႎ໏୲(Hz) 4.17 8.33 16.7 33.2 62 123 242 470 G=1 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) G=2 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (15.5) G=4 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (16) G=8 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (16) G = 16 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) Rev. D | Page 15 of 36 G = 32 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) G = 64 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (15) 16 (14.5) G = 128 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.5) 16 (14.5) 16 (14) 16 (13.5) AD7794/AD7795  14 8388750 12 8388700 10 8388650 8388600 8 6 8388550 4 8388500 2 8388450 0 200 400 600 800 04854-009 OCCURRENCE 8388800 04854-006 CODE READ ‫ۆ‬႙߾ፕ༬Ⴀ 0 8388068 8388100 1000 8388150 8388200 8388250 8388300 8388350 8388396 CODE READING NUMBER ཮6. AD7794‫ۆ‬႙ሯำ཮ (ాևएጚ‫ۉ‬უLjሺᅮ = 64Lj߸ႎ໏୲ = 16.7 HzLjቘհ๑ీ) ཮9. AD7794ሯำ‫ݴ‬ք኱‫ా)཮ݛ‬ևएጚ‫ۉ‬უLj ሺᅮ = 64Lj߸ႎ໏୲ = 16.7 HzLjቘհ্ᆩLjAMP-CM = 1Dž 16 14 20 10 (%) OCCURRENCE 12 8 10 6 04854-007 2 0 8388482 8388520 8388560 8388600 8388640 8388680 8388720 04854-010 4 0 –2.0 8388750 –1.2 –0.8 CODE 0.4 0.8 1.2 1.6 2.0 ཮10. ࣍ৣ࿒‫้܈‬घ૤‫ୁۉ‬೅ದ(210 μA) 90 8388400 80 8388350 70 POWER-UP TIME (ms) 8388450 8388300 8388250 8388200 8388150 60 50 BOOST = 0 40 30 0 200 400 600 800 1000 READING NUMBER 10 0 04854-011 20 8388100 04854-008 CODE READ 0 MATCHING (%) ཮7. AD7794ሯำ‫ݴ‬ք኱‫཮ݛ‬ )ాևएጚ‫ۉ‬უLjሺᅮ = 64Lj߸ႎ໏୲ = 16.7 HzLjቘհ๑ీDž 8388050 –0.4 BOOST = 1 0 200 400 600 800 1000 LOAD CAPACITANCE (nF) ཮8. AD7794‫ۆ‬႙ሯำ཮)ాևएጚ‫ۉ‬უLj ሺᅮ = 64Lj߸ႎ໏୲ = 16.7 HzLjAMP-CM = 1Ljቘհ্ᆩDž ཮11. ೋዃ‫ۉ‬უ݀ิഗฉ‫้ۉ‬क़ᇑ޶ሜ‫ۉ‬ඹ‫࠲ڦ‬ဣ Rev. D | Page 16 of 36 AD7794/AD7795  ೌాस٪ഗ! ADCཚࡗೌాस٪ഗ৊ႜ੦዆ࢅದዃLjူ௬‫ڦ‬ቤবॽຫ௽ ኄၵस٪ഗăሞူ௬‫ڦ‬௮ຎዐLj“ዃ1”՗๖இड1ጒༀLj“ൣ 0”՗๖இड0ጒༀLj‫ݥأ‬ଷᆶຫ௽ă ཚ႑स٪ഗ RS2, RS1, RS0 = 0, 0, 0 ཚ႑स٪ഗ๟ᅃ߲8࿋ኻႀस٪ഗăᇑADCഗॲ‫ڦ‬໯ᆶཚ ႑਩ՂႷᅜ‫ܔ‬ཚ႑स٪ഗ‫ڦ‬ႀ֡ፕਸ๔ăႀ෇ཚ႑स٪ഗ ‫ڦ‬ຕ਍ਦۨူᅃ߲֡ፕ๟‫֡܁‬ፕ࣏๟ႀ֡ፕLjᅜतُ֡ፕ ݀ ิሞనᅃ߲स٪ഗă‫ܔ‬ᇀ‫܁‬ईႀ֡ፕLj‫ܔړ‬჋ۨस٪ഗ‫ڦ‬ ‫܁‬ईႀ֡ፕྜ‫ࢫׯ‬Ljথ੨‫ܔڟ࣮ݓ‬ཚ႑स٪ഗኴႜႀ֡ፕ ‫ڦ‬ጒༀăኄ๟থ੨‫ڦ‬ఐණጒༀLjܸ൐ሞฉ‫ۉ‬ईް࿋ࢫLj ADC‫ت‬ᇀُఐණጒༀLj‫ܔځڪ‬ཚ႑स٪ഗ‫ڦ‬ႀ֡ፕăසࡕ থ੨้Ⴞ௚฿Ljኴႜᅃ߲቞ᆩ዁ณ32߲‫ز‬ႜ้ዓዜ೺‫ڦ‬ႀ ֡ፕLjժ๑DIN‫ت‬ᇀߛ‫ۉ‬ೝጒༀLjॽ੗ᅜް࿋ኝ߲ഗॲLj ๑ADC‫ُ࣮ݓ‬ఐණጒༀă՗14ଚ‫؜‬କཚ႑स٪ഗ߳࿋‫ڦ‬ఁ ‫ࢅ׬‬ᅪᅭăCR0዁CR7՗๖࿋‫ڦ‬࿋ዃLjCRຫ௽ኄၵ࿋ຌᇀ ཚ႑स٪ഗăCR7՗๖ຕ਍ୁ‫ڼڦ‬ᅃ࿋ăઔࡽዐ‫ڦ‬ຕኵ՗ ๖޿࿋‫ڦ‬ฉ‫ۉ‬/ް࿋ఐණጒༀă CR7 CR6 CR5 CR4 CR3 CR2 CR1 CR0 WEN(0) R/W(0) RS2(0) RS1(0) RS0(0) CREAD(0) 0(0) 0(0) ՗14. ཚ႑स٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭ ࿋ࡽ CR7 ఁ‫׬‬ WEN ௮ຎ ႀ෇๑ీ࿋ăՂႷॽ0ႀ෇ُ࿋Lj֍ీ๑‫ܔ‬ཚ႑स٪ഗႀ֡ፕํा݀ิăසࡕ‫ڼ‬ᅃ࿋ႀ෇1Ljሶഗॲփࣷॽໜࢫ ‫ڦ‬࿋ሜ෇स٪ഗLj໲ॽཕାሞُ࿋‫ڦ‬࿋ዃLj኱‫ُڟ‬࿋ႀ෇0ăᅃ‫ॽڋ‬0ႀ෇!!! WEN ࿋LjഗॲՍࣷॽࢫჄ7࿋ሜ෇ཚ ႑स٪ഗă CR6 R/W CR5 ዁ CR3 CR2 RS2 ዁ RS0 සࡕُ࿋ྺ0Ljሶ՗๖ူᅃ߲֡ፕ๟‫ܔ‬ኸۨस٪ഗኴႜႀ֡ፕăසࡕُ࿋ྺ1Ljሶ՗๖ူᅃ߲֡ፕ๟‫ܔ‬ኸۨस ٪ഗኴႜ‫֡܁‬ፕă स٪ഗ‫ں‬኷࿋ăኄၵ‫ں‬኷࿋ਦۨ‫ز‬ႜথ੨ཚ႑೺क़჋ስADC‫ڦ‬నၵस٪ഗă֖९՗15ă CREAD ૶Ⴤ‫܁‬ൽຕ਍स٪ഗă‫ُړ‬࿋ྺ1(ժ൐ᅙ჋ስຕ਍स٪ഗ)้Lj‫ز‬ႜথ੨੗ᅜ૶Ⴤ‫܁‬ൽຕ਍स٪ഗǗनሞRDYᆅগ Վྺ‫ۉگ‬ೝ(՗๖ገ࣑ᅙྜ‫ࢫ)ׯ‬แेSCLKஞ؋้Ljຕ਍स٪ഗ‫ాڦ‬ඹॽጲ‫ۯ‬ዃᇀDOUTᆅগฉă‫ܔ‬ᇀࢫჄຕ਍ ‫܁‬ൽLjփՂ‫ܔ‬ཚ႑स٪ഗኴႜႀ֡ፕăᄲ๑ీ૶Ⴤ‫܁‬ൽఇ๕LjՂႷॽኸସ01011100ႀ෇ཚ႑स٪ഗăැᄲཽ ‫૶؜‬Ⴤ‫܁‬ൽఇ๕LjՂႷሞRDYᆅগྺ‫ۉگ‬ೝ้ॽኸସ01011000ႀ෇ཚ႑स٪ഗăሞ૶Ⴤ‫܁‬ൽఇ๕ူLjADCࣷ॔ ੦DIN၍ୟฉ‫ڦ‬ऄ‫ۯ‬LjᅜՍీথ๭ኸସᅜཽ‫૶؜‬Ⴤ‫܁‬ൽఇ๕ăُྔLjසࡕDINฉ‫؜‬၄32߲૶Ⴤ1LjADCॽް࿋ă ᅺُLjሞ૶Ⴤ‫܁‬ൽఇ๕ူLjDINᆌԍ‫ۉگ׼‬ೝLj኱‫ڟ‬ᆶኸସႀ෇޿ഗॲă CR1 ዁ CR0 0 ՂႷॽኄၵ࿋Պ‫ྺײ‬இड0֍ీኟ‫߾׉‬ፕă ՗15. स٪ഗ჋ስ RS2 0 0 0 0 0 1 1 1 1 RS1 0 0 0 1 1 0 0 1 1 RS0 0 0 1 0 1 0 1 0 1 स٪ഗ ႀ֡ፕ೺क़ྺཚ႑स٪ഗ ‫֡܁‬ፕ೺क़ྺጒༀस٪ഗ ఇ๕स٪ഗ ದዃस٪ഗ ຕ਍स٪ഗ IDस٪ഗ IOस٪ഗ ฿ۙस٪ഗ ஢ଉ‫ײ‬स٪ഗ स٪ഗ‫ٷ‬ၭ 8࿋ 8࿋ 16࿋ 16࿋ 24࿋(AD7794)/16࿋(AD7795) 8࿋ 8࿋ 24࿋(AD7794)/16࿋(AD7795) 24࿋(AD7794)/16࿋(AD7795) Rev. D | Page 17 of 36 AD7794/AD7795 ጒༀस٪ഗ RS2, RS1, RS0 = 0, 0, 0；ฉ‫ۉ‬/ް࿋ = 0x80 (AD7795) / 0x88 (AD7794) ጒༀस٪ഗ๟ᅃ߲8࿋ኻ‫܁‬स٪ഗăᄲ‫ݡ‬࿚ADCጒༀस٪ ഗLjᆩࢽՂႷႀ෇ཚ႑स٪ഗLj჋ስူᅃ߲֡ፕྺ‫֡܁‬ ፕLjժॽ0ሜ෇࿋RS2Ă࿋RS1ࢅ࿋RS0ă ՗16ଚ‫؜‬କጒༀस٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭăSR0዁SR7՗๖ ࿋‫ڦ‬࿋ዃLjSRຫ௽ኄၵ࿋ຌᇀጒༀस٪ഗăSR7՗๖ຕ਍ ୁ‫ڼڦ‬ᅃ࿋ăઔࡽዐ‫ڦ‬ຕኵ՗๖޿࿋‫ڦ‬ฉ‫ۉ‬/ް࿋ఐණጒ ༀă SR7 SR6 SR5 SR4 SR3 SR2 SR1 SR0 RDY(1) ERR(0) NOXREF(0) 0(0) 0/1 CH2(0) CH1(0) CH0(0) ՗14. ཚ႑स٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭ ՗16. ጒༀस٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭ ࿋ࡽ SR7 ఁ‫׬‬ RDY ௮ຎ ADC৽Ⴣ࿋ăຕ਍ႀ෇ADCຕ਍स٪ഗࢫൣ0ă‫܁‬ൽADCຕ਍स٪ഗኮࢫLjईኁሞᆩႎገ࣑঳ࡕ߸ႎຕ਍स٪ ഗኮമ‫ڦ‬ᅃ้ۨक़ాLjRDY࿋ጲ‫ۯ‬ዃ1Ljᅜߢኪᆩࢽփᆌ‫܁‬ൽገ࣑ຕ਍ăഗॲሞู‫ۉ‬ఇ๕ူLj໲ᄺࣷዃ1ă DOUT/RDYᆅগᄺࣷኸ๖ገ࣑ࢆ้঳ຐă޿ᆅগ੗ᅜ‫༺پ‬ጒༀस٪ഗઠ॔๫ADCᆶ࿮ገ࣑ຕ਍ă SR6 ERR ADC‫ٱ‬ဃ࿋ăُ࿋ᇑRDY࿋ཞ้ႀ෇ăዃ1้ຫ௽ႀ෇ADCຕ਍स٪ഗ‫ڦ‬঳ࡕᶏ࿋ྺඇ0ईඇ1ă‫ٱ‬ဃᇱᅺԈઔ ‫ג‬ଉ‫ײ‬Ăവଉ‫ײ‬ईඍณएጚ‫ۉ‬უăᆯഔ‫ۯ‬ገ࣑‫ڦ‬ႀ֡ፕൣ0ă SR5 NOXREF ࿮ྔևएጚ‫ۉ‬უ࿋ăዃ1้ຫ௽჋ۨ‫ڦ‬एጚ‫ۉ‬უ)REFIN1ईREFIN2*‫گ‬ᇀࡀۨ‫ڦ‬ពኵăዃ1ࢫLjገ࣑঳ࡕᶏ࿋ྺ ඇ1ăൣ0ሶຫ௽‫ܔ‬჋ۨ‫ڦ‬एጚ‫ۉ‬უᆅগแेକᆶၳएጚ‫ۉ‬უăॽದዃस٪ഗዐ‫ڦ‬REF_DET࿋ዃ1੗๑ీ NOXREF࿋ăසࡕแेᇀ჋ۨएጚ‫ۉ‬უ๼෇‫ۉڦ‬უ࿮ၳLjሶERR࿋ᄺዃ1ă SR4 SR3 SR2 to SR0 0 0/1 CH2 to CH0 ُ࿋ጲ‫ۯ‬ൣ0ă ‫ܔ‬ᇀAD7795Ljُ࿋ጲ‫ۯ‬ൣ0Ǘ‫ܔ‬ᇀAD7794Ljُ࿋ጲ‫ۯ‬ዃ1ă ኄၵ࿋՗๖ADCኟሞገ࣑నᅃཚ‫ڢ‬ă Rev. D | Page 18 of 36 AD7794/AD7795  ఇ๕स٪ഗ RS2, RS1, RS0 = 0, 0, 1Ǘฉ‫ۉ‬/ް࿋ = 0x000A ఇ๕स٪ഗ๟ᅃ߲16࿋‫܁‬ႀस٪ഗLjᆩઠ჋ስ߾ፕఇ๕Ă ߸ႎ໏୲ࢅ้ዓᇸă ՗17ଚ‫؜‬କఇ๕स٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭăMR0዁MR15 MR15 MD2(0) MR7 CLK1(0) MR14 MD1(0) MR6 CLK0(0) MR13 MD0(0) MR5 0(0) MR12 PSW(0) MR4 CHOP-DIS(0) ՗๖࿋‫ڦ‬࿋ዃLjMRຫ௽ኄၵ࿋ຌᇀఇ๕स٪ഗăMR15๟ ຕ਍ୁ‫ڼڦ‬ᅃ࿋ăઔࡽዐ‫ڦ‬ຕኵ՗๖޿࿋‫ڦ‬ฉ‫ۉ‬/ް࿋ఐණ ጒༀăኻᄲ‫ܔ‬ยዃस٪ഗኴႜႀ֡ፕLj৽ࣷް࿋ۙ዆ഗࢅ ୳հഗLjժ๑ ࿋ዃ1ă MR11 0(0) MR3 FS3(1) MR10 0(0) MR2 FS2(0) MR9 AMP-CM(0) MR1 FS1(1) MR8 0(0) MR0 FS0(0) ՗17. ఇ๕स٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭ ࿋ࡽ MR15 ዁ MR13 MR12 ఁ‫׬‬ MD2 ዁ MD0 PSW ௮ຎ MR11 ዁ MR10 MR9 0 AMP-CM ՂႷॽኄၵ࿋Պ‫ྺײ‬இड0֍ీኟ‫߾׉‬ፕă ᅏ՗‫ٷݣ‬ഗࠌఇ࿋ăُ࿋ᇑCHOP-DIS࿋ᅃཞ๑ᆩăቘհ্ᆩ൐AMP-CMൣ0้Ljᆩࢽ੗ᅜइ‫੻߸ڥ‬ ‫ࠌڦ‬ఇ‫ۉ‬უ‫ྷݔ‬ă‫ڍ‬๟Lj኱ୁࠌఇᅞ዆ႠీࣷူইăAMP-CMዃ1้Ljࠌఇ‫ۉ‬უ‫ྷݔ‬໫ၭDŽ֖९र ຍࡀ߭և‫ݴ‬Džă‫ڍ‬๟Lj኱ୁࠌఇᅞ዆Ⴀీ၂ዸ༵ߛă MR8 MR7 ዁ MR6 0 CLK1 ዁ CLK0 ՂႷॽُ࿋Պ‫ྺײ‬இड0֍ీኟ‫߾׉‬ፕă ኄၵ࿋ᆩઠ჋ስAD7794/AD7795‫้ڦ‬ዓᇸă੗ᅜ๑ᆩೌా64 kHz้ዓईྔև้ዓă๑ᆩྔև้ዓ้Lj ‫߲ܠ‬AD7794/AD7795ഗॲ੗ᅜཞօăُྔLj‫֑ړ‬ᆩ৛ඓ‫ྔڦ‬և้ዓൻ‫ۯ‬AD7794/AD7795้Lj੗ᅜ߀ ฀50 Hz/60 Hzᅞ዆Ⴀీă ‫ۉ‬ᇸਸ࠲੦዆࿋ăዃ1้Lj‫ۉ‬ᇸਸ࠲PSWԿࢇ዁GNDă‫ۉ‬ᇸਸ࠲੗༵ࠃ30 mA‫ڦ‬ဌ‫ୁۉ‬ăൣ0้Lj‫ۉ‬ᇸਸ ࠲܏ਸă‫ړ‬ADC‫ت‬ᇀู‫ۉ‬ఇ๕้Lj‫ۉ‬ᇸਸ࠲܏ਸă CLK1 0 0 1 MR5 MR4 0 CHOP-DIS MR3 ዁ MR0 FS3 ዁ FS0 CLK0 0 1 0 ADC้ዓᇸ 64 kHzాև้ዓăCLKᆅগփ༵ࠃాև้ዓă 64 kHzాև้ዓăCLKᆅগ༵ࠃُాև้ዓă 64 kHzྔև้ዓăྔև้ዓ੗ᅜਏᆶ45:55‫ڦ‬቞੣Բ)֖९रຍࡀ߭ྔև้ዓև‫*ݴ‬ă 1 1 ྔև้ዓăྔև้ዓሞAD7794/AD7795ా2‫ݴ‬ೕă ՂႷॽُ࿋Պ‫ྺײ‬இड0֍ీኟ‫߾׉‬ፕă ُ࿋ᆩઠ๑ీई্ᆩቘհăฉ‫้ۉ‬ईް࿋ኮࢫLjCHOP-DISൣ0Ljቘհ๑ీăCHOP-DISዃ1้Ljቘհ্ᆩă ُ࿋ᇑAMP-CM࿋ᅃཞ๑ᆩăቘհ্ᆩ้LjAMP-CM࿋ᆌዃ1ăኄࣷ၌዆ADC੗ᅜ๑ᆩ‫ࠌڦ‬ఇ‫ۉ‬უLj‫ڍ‬ ኱ୁࠌఇᅞ዆Ⴀీփࣷူইă ୳հഗ߸ႎ໏୲჋ስ࿋)֖९՗19*ă Rev. D | Page 19 of 36 AD7794/AD7795  ՗18. ߾ፕఇ๕ MD2 0 MD1 0 MD0 0 ఇ๕ ૶Ⴤገ࣑ఇ๕(ఐණ)ă ሞ૶Ⴤገ࣑ఇ๕ူLjADC૶Ⴤኴႜገ࣑Ljժॽ঳ࡕዃᇀຕ਍स٪ഗዐăRDYሞྜ‫ׯ‬ገ้࣑Վྺ‫ۉگ‬ೝăᆩ ࢽ੗ᅜॽഗॲዃᇀ૶Ⴤ‫܁‬ൽఇ๕ူLjᅜ‫܁‬ൽኄၵገ࣑঳ࡕǗ‫ړ‬แेSCLKஞ؋้Ljገ࣑঳ࡕጲ‫ۯ‬ዃᇀDOUT ၍ୟฉăଷᅃ‫ݛ‬௬Ljᆩࢽ੗ᅜႀ෇ཚ႑स٪ഗLjኸ๖ADC๼‫؜‬ገ࣑঳ࡕăฉ‫ۉ‬ኮࢫLjঢ়ࡗ2/fADC)ቘհ๑ీ ้*ई1/fADC)ቘհ্ᆩ้*‫้ڦ‬क़༵ࠃ‫ڼ‬ᅃ߲ገ࣑঳ࡕăࢫჄገ࣑঳ࡕᅜfADC‫ڦ‬ೕ୲༵ࠃLj࿮ஃቘհ๑ీᇑ‫ޏ‬ă 0 0 1 ‫ْڇ‬ገ࣑ఇ๕ ჋ስ‫ْڇ‬ገ࣑ఇ๕้LjADCฉ‫ۉ‬ժኴႜ‫ْڇ‬ገ࣑ăና‫ږ‬ഗฉ‫ॺࢅۉ‬૬Ⴔᄲ1 msă඗ࢫLjADCኴႜገ࣑LjႴᄲ 2/fADC)ቘհ๑ీ้*ई1/fADC)ቘհ্ᆩ้*‫้ڦ‬क़ăገ࣑঳ࡕዃᇀຕ਍स٪ഗዐLjRDYՎྺ‫ۉگ‬ೝLj඗ࢫADC‫࣮ݓ‬ ู‫ۉ‬ఇ๕ăሞຕ਍ԥ‫܁‬ൽईኴႜଷᅃْገ࣑ኮമLjገ࣑঳ࡕॽᅃ኱ԥԍ٪ሞຕ਍स٪ഗዐLjժ൐RDYԍ‫׼‬ᆶ ၳ)‫ۉگ‬ೝ*ă 0 1 0 ੣ှఇ๕ă ሞ੣ှఇ๕ူLjADC୳հഗࢅۙ዆ഗԍ‫ް׼‬࿋ጒༀLj‫ڍ‬ධ඗༵ࠃۙ዆ഗ้ዓă 0 1 1 1 0 0 ู‫ۉ‬ఇ๕ă ሞู‫ۉ‬ఇ๕ူLjAD7794/AD7795໯ᆶ‫ۉ‬ୟ‫܏࠲ۼ‬LjԈઔ‫ୁۉ‬ᇸĂ‫ۉ‬ᇸਸ࠲Ăභ܏‫ୁۉ‬Ăೋዃ‫ۉ‬უ݀ิഗࢅ ้ዓ‫ۉ‬ୟă ాևଭ‫ۉ‬ೝၯጚă ాև‫܌‬ୟጲ‫૶ۯ‬থ‫ڟ‬๑ీ‫ڦ‬ཚ‫ڢ‬ăྜ‫ׯ‬ၯጚႴᄲଇ߲ገ࣑ዜ೺(ቘհ๑ీ้)ईᅃ߲ገ࣑ዜ೺(ቘհ্ᆩ้)ă RDYሞၯጚഔ‫้ۯ‬Վྺߛ‫ۉ‬ೝLjሞၯጚྜ‫ۉگް้࣬ׯ‬ೝăၯጚኮࢫLjADC‫ت‬ᇀ੣ှఇ๕ă֪‫ڦڥ‬฿ۙဣຕ ዃᇀ჋ۨཚ‫ڦڢ‬฿ۙस٪ഗዐă 1 0 1 ాև஢ଉ‫ײ‬ၯጚă ‫ܔ‬ᇀ޿ၯጚLj஢ଉ‫ײ‬๼෇‫ۉ‬უࣷጲ‫૶ۯ‬থ‫ڟ‬჋ۨ‫ڦ‬ఇె๼෇ă ‫ړ‬ሺᅮྺ1้Ljྜ‫ׯ‬ၯጚႴᄲଇ߲ገ࣑ዜ೺(ቘհ๑ీ้)ईᅃ߲ገ࣑ዜ೺(ቘհ্ᆩ้)ă ‫ܔ‬ᇀ߸ߛሺᅮLjኴႜ஢ଉ‫ײ‬ၯጚႴᄲ຺߲ገ࣑ዜ೺(ቘհ๑ీ้)ईଇ߲ገ࣑ዜ೺(ቘհ্ᆩ้)ă RDYሞၯጚഔ‫้ۯ‬Վྺߛ‫ۉ‬ೝLjሞၯጚྜ‫ۉگް้࣬ׯ‬ೝăၯጚኮࢫLjADC‫ت‬ᇀ੣ှఇ๕ă֪‫ڦڥ‬஢ଉ‫ײ‬ဣ ຕዃᇀ჋ۨཚ‫ڦڢ‬஢ଉ‫ײ‬स٪ഗዐă ‫ړ‬ሺᅮྺ128้Lj࿮݆ኴႜాև஢ଉ‫ײ‬ၯጚă‫ܔ‬ᇀ޿ሺᅮยዃLj੗ᅜኴႜဣཥ஢ଉ‫ײ‬ၯጚă௅ْ߸߀ᅃ߲ ཚ‫ڦڢ‬ሺᅮ้Lj‫ۼ‬Ⴔᄲኴႜ஢ଉ‫ײ‬ၯጚLjᅜ๑஢ଉ‫ײ‬ဃֶፌၭă 1 1 0 ဣཥଭ‫ۉ‬ೝၯጚă ᆩࢽᆌॽဣཥଭ‫ۉ‬ೝ๼෇૶থ‫ڟ‬CH2࿋ĂCH1࿋ࢅCH0࿋໯჋ስ‫ڦ‬ཚ‫ڢ‬๼෇ᆅগăྜ‫ׯ‬ဣཥ฿ۙၯጚႴᄲଇ ߲ገ࣑ዜ೺(ቘհ๑ీ้)ईᅃ߲ገ࣑ዜ೺(ቘհ্ᆩ้)ăRDYሞၯጚഔ‫้ۯ‬Վྺߛ‫ۉ‬ೝLjሞၯጚྜ‫گް้࣬ׯ‬ ‫ۉ‬ೝăၯጚኮࢫLjADC‫ت‬ᇀ੣ှఇ๕ă֪‫ڦڥ‬฿ۙဣຕዃᇀ჋ۨཚ‫ڦڢ‬฿ۙस٪ഗዐă 1 1 1 ဣཥ஢ଉ‫ײ‬ၯጚă ᆩࢽᆌॽဣཥ஢ଉ‫ײ‬๼෇૶থ‫ڟ‬CH2࿋ĂCH1࿋ࢅCH0࿋໯჋ስ‫ڦ‬ཚ‫ڢ‬๼෇ᆅগă ྜ‫ׯ‬ၯጚႴᄲଇ߲ገ࣑ዜ೺(ቘհ๑ీ้)ईᅃ߲ገ࣑ዜ೺(ቘհ্ᆩ้)ă ሞၯጚഔ‫้ۯ‬Վྺߛ‫ۉ‬ೝLjRDYሞၯ ጚྜ‫ۉگް้࣬ׯ‬ೝăၯጚኮࢫLjADC‫ت‬ᇀ੣ှఇ๕ă֪‫ڦڥ‬஢ଉ‫ײ‬ဣຕዃᇀ჋ۨཚ‫ڦڢ‬஢ଉ‫ײ‬स٪ഗዐă Rev. D | Page 20 of 36 AD7794/AD7795  ՗19. ੗ᆩ߸ႎ໏୲(ቘհ๑ీ)1 FS3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 FS2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 FS1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 FS0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 fADC (Hz) x 470 242 123 62 50 39 33.2 19.6 16.7 16.7 12.5 10 8.33 6.25 4.17 TSETTLE (ms) x 4 8 16 32 40 48 60 101 120 120 160 200 240 320 480 50 Hz/60 Hzᅞ዆(ాև้ዓ) 90 dB (ৈ60 Hz) 80 dB (ৈ60 Hz) 65 dB (50 Hz ࢅ 60 Hz) 66 dB (50 Hz ࢅ 60 Hz) 69 dB (50 Hz ࢅ 60 Hz) 70 dB (50 Hz ࢅ 60 Hz) 72 dB (50 Hz ࢅ 60 Hz) 74 dB (50 Hz ࢅ 60 Hz) ቘհ্ᆩ้Lj߸ႎ໏୲ԍ‫׼‬փՎLj‫ڍ‬௅߲߸ႎ໏୲‫ॺڦ‬૬้क़໫‫܌‬2Ԡă16.7 Hz߸ႎ໏୲้50 Hz/60 Hzᅞ዆ူইྺ65 dBă Rev. D | Page 21 of 36 AD7794/AD7795  ದዃस٪ഗ ՗ 20ଚ ‫ ؜‬କ ದ ዃ स ٪ ഗ ߳ ࿋ ‫ ڦ‬ఁ ‫ ࢅ ׬‬ᅪ ᅭ ă CON0዁ CON15՗๖࿋‫ڦ‬࿋ዃLjCONຫ௽ኄၵ࿋ຌᇀದዃस٪ഗă CON15๟ຕ਍ୁ‫ڼڦ‬ᅃ࿋ăઔࡽዐ‫ڦ‬ຕኵ՗๖޿࿋‫ڦ‬ฉ‫ۉ‬ /ް࿋ఐණጒༀă RS2, RS1, RS0 = 0, 1, 0Ǘฉ‫ۉ‬/ް࿋ = 0x0710 ದዃस٪ഗ๟ᅃ߲16࿋‫܁‬ႀस٪ഗLjᆩઠದዃADC‫ڇڦ‬ट ႠईມटႠఇ๕Lj๑ీई্ᆩ࣐؋ഗLj๑ీई্ᆩභ܏‫ۉ‬ ୁLj჋ስሺᅮLjᅜत჋ስఇె๼෇ཚ‫ڢ‬ă CON15 VBIAS1(0) CON14 VBIAS0(0) CON13 BO(0) CON12 U/B(0) CON11 BOOST(0) CON10 G2(1) CON9 G1(1) CON8 G0(1) CON7 REFSEL1(0) CON6 REFSEL0(0) CON5 REF_DET(0) CON4 BUF(1) CON3 CH3(0) CON2 CH2(0) CON1 CH1(0) CON0 CH0(0) ՗20. ದዃस٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭ ࿋ࡽ CON15 ዁ CON14 ఁ‫׬‬ VBIAS1 ዁ VBIAS0 ௮ຎ ೋዃ‫ۉ‬უ݀ิഗ๑ీăఇె๼෇‫܋޶ڦ‬੗ೋዃ‫ڟ‬AVDD/2ăኄၵ࿋ᇑBOOST࿋ᅃཞ๑ᆩă VBIAS1 VBIAS0 ೋዃ‫ۉ‬უ 0 0 ೋዃ‫ۉ‬უ݀ิഗ্ᆩ 0 1 ೋዃ‫ۉ‬უ݀ิഗ૶থ‫ڟ‬AIN1(−) 1 0 ೋዃ‫ۉ‬უ݀ิഗ૶থ‫ڟ‬AIN2(−) 1 1 ೋዃ‫ۉ‬უ݀ิഗ૶থ‫ڟ‬AIN3(−) භ܏‫ୁۉ‬๑ీ࿋ăՂႷॽُ࿋Պ‫ྺײ‬இड0֍ీኟ‫߾׉‬ፕăُ࿋ዃ1ॽ๑ీ႑ࡽୟ০ዐ‫ڦ‬100 nA‫ୁۉ‬ ᇸăBO = 0ॽ্ᆩභ܏‫ୁۉ‬ăৈ‫࣐ړ‬؋ഗईᅏ՗‫ٷݣ‬ഗྺᆶၳጒༀ้Lj֍ీ๑ీභ܏‫ୁۉ‬ă CON13 BO CON12 U/B ມटႠ/‫ڇ‬टႠ࿋ăዃ1ॽ๑ీ‫ڇ‬टႠՊஓLjनଭֶ‫ݴ‬๼෇ׂิ0x000000๼‫؜‬Lj஢ଉ‫ݴֶײ‬๼෇ׂิ 0xFFFFFF๼‫؜‬ăൣ0ॽ๑ీມटႠՊஓă޶஢ଉ‫ݴֶײ‬๼෇ׂิ0x000000๼‫؜‬ஓLjଭֶ‫ݴ‬๼෇ׂิ 0x800000๼‫؜‬ஓLjኟ஢ଉ‫ݴֶײ‬๼෇ׂิ0xFFFFFF๼‫؜‬ஓă CON11 BOOST ُ࿋ᇑVBIAS1ࢅVBIAS0࿋ᅃཞ๑ᆩăዃ1้Ljೋዃ‫ۉ‬უ݀ิഗ‫ߛ༵ࡼࠀڦ‬Ljฉ‫้ۉ‬क़໫‫܌‬ă CON10 ዁ CON8 G2 ዁ G0 ሺᅮ჋ስ࿋ă ᆯᆩࢽႀ෇Ljᅜ჋ስူଚADC๼෇‫ྷݔ‬ኮᅃǖ G2 G1 G0 ሺᅮ ADC๼෇‫)ྷݔ‬2.5 Vएጚ‫ۉ‬უ* 0 0 0 1)ᅏ՗‫ٷݣ‬ഗփᆩDž2.5 V 0 CON7 ዁ CON6 REFSEL1/REFSEL0 0 1 2)ᅏ՗‫ٷݣ‬ഗփᆩDž1.25 V 0 1 0 4 625 mV 0 1 1 8 312.5 mV 1 0 0 16 156.2 mV 1 0 1 32 78.125 mV 1 1 0 64 39.06 mV 1 1 1 128 19.53 mV एጚ‫ۉ‬უ჋ስ࿋ă ኄၵ࿋ᆩઠ჋ስADC‫ڦ‬एጚ‫ۉ‬უᇸă REFSEL1 REFSEL0 एጚ‫ۉ‬უᇸ 0 0 ሞREFIN1(+)ᇑREFIN1(−)ኮक़แे‫ྔڦ‬ևएጚ‫ۉ‬უᇸ 0 1 ሞREFIN1(+)ᇑREFIN2(−)ኮक़แे‫ྔڦ‬ևएጚ‫ۉ‬უᇸ 1 0 1.17 Vాևएጚ‫ۉ‬უᇸ 1 1 ԍା Rev. D | Page 22 of 36 AD7794/AD7795 ! ࿋ࡽ CON5 ఁ‫׬‬ REF_DET ௮ຎ ๑ీएጚ‫ۉ‬უॠ֪ࠀీăዃ1้LjසࡕADC໯ᆩ‫ྔڦ‬ևएጚ‫ۉ‬უᇸਸୟईၭᇀ0.5 VLjጒༀस٪ഗዐ‫ڦ‬ NOXREF࿋ॽߴ‫༵؜‬๖ăൣ0้Ljएጚ‫ۉ‬უॠ֪ࠀీ্ᆩă CON4 BUF ದዃADCྺ࣐؋ई࿮࣐؋߾ፕఇ๕ăൣ0้LjADCᅜ࿮࣐؋ఇ๕߾ፕLj੗ই‫گ‬ഗॲ‫ࡼࠀڦ‬ăዃ1้Lj ADCᅜ࣐؋ఇ๕߾ፕLjᆩࢽ੗ᅜॽᇸፆੇዃᇀമ‫܋‬Ljܸփࣷߴဣཥ‫ټ‬ઠሺᅮဃֶă‫ܔ‬ᇀሺᅮ1ࢅ2Lj ੗ᅜ๑ీई্ᆩ࣐؋ഗă‫ܔ‬ᇀ߸ߛሺᅮLj࣐؋ഗጲ‫ۯ‬๑ీă࣐؋ഗ্ᆩ้Ljఇె๼෇ᆅগฉ‫ۉڦ‬უ ੗ᅜྺGNDᅜူ30 mV዁AVDDᅜฉ30 mVă࣐؋ഗ๑ీ้Lj໲ႴᄲᅃၵᇧଉǗᅺُLjඪࢆ๼෇ᆅগฉ ‫ۉڦ‬უՂႷሞ‫ۉ‬ᇸࡆ‫ڦ‬100 mV‫ాྷݔ‬ă CON3 ዁ CON0 CH3 ዁ CH0 ཚ‫ڢ‬჋ስ࿋ă ᆯᆩࢽႀ෇Ljᅜ჋ስADC‫ڦ‬ᆶၳఇె๼෇ཚ‫ڢ‬ǖ CH3 CH2 CH1 CH0 ཚ‫ڢ‬ 0 0 0 0 AIN1(+)/AIN1(−) 0 0 0 1 AIN2(+)/AIN2(−) 0 0 1 0 AIN3(+)/AIN3(−) 0 0 1 1 AIN4(+)/AIN4(−) 0 1 0 0 AIN5(+)/AIN5(−) 0 1 0 1 AIN6(+)/AIN6(−) 0 1 1 0 ࿒‫ߌد܈‬ഗ ၯጚ‫ܔ‬ 0 1 2 3 3 3 ጲ‫ۯ‬჋ስ1.17 Vాևएጚ‫ۉ‬უLjժॽሺᅮยྺ1 0 1 1 1 AVDD ॔੦ഗ ጲ‫ۯ‬჋ስ1.17 Vాևएጚ‫ۉ‬უLjժॽሺᅮยྺ1/6 1 1 1 1 1 1 1 0 0 0 1 1 1 1 0 0 1 0 0 1 1 0 1 1 0 1 0 1 AIN1(−)/AIN1(−) ԍା ԍା ԍା ԍା ԍା ԍା 0 Rev. D | Page 23 of 36 AD7794/AD7795  ຕ਍स٪ഗ JPस٪ഗ RS2, RS1, RS0 = 0, 1, 1Ǘ ฉ‫ۉ‬/ް࿋ = 0x0000(AD7795), 0x000000 (AD7794) ُຕ਍स٪ഗ٪‫ئ‬ADC‫ڦ‬ገ࣑঳ࡕă໲๟ᅃ߲ኻ‫܁‬स٪ ഗăྜ‫ُܔׯ‬स٪ഗ‫֡܁ڦ‬ፕࢫLj RDY࿋/ᆅগዃ1ă RS2, RS1, RS0 = 1, 0, 1Ǘฉ‫ۉ‬/ް࿋ = 0x00 IOस٪ഗ๟ᅃ߲8࿋‫܁‬ႀस٪ഗLjᆩઠ๑ీघ૤‫ୁۉ‬ժ჋ ስघ૤‫ڦୁۉ‬ኵă ՗21ଚ‫؜‬କIOस٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭăIO0዁IO7՗๖࿋ ‫ڦ‬࿋ዃLjIOຫ௽ኄၵ࿋ຌᇀIOस٪ഗăIO7՗๖ຕ਍ୁ‫ڦ‬ ‫ڼ‬ᅃ࿋ăઔࡽዐ‫ڦ‬ຕኵ՗๖޿࿋‫ڦ‬ฉ‫ۉ‬/ް࿋ఐණጒༀă IDस٪ഗ RS2, RS1, RS0 = 1, 0, 0Ǘฉ‫ۉ‬/ް࿋ = 0xXF IDस٪ഗ٪‫ئ‬AD7794/AD7795‫๎ڦ‬՚ࡽă໲๟ᅃ߲ኻ‫܁‬स ٪ഗă IO7 0(0) IO6 IOEN(0) IO5 IO2DAT(0) IO4 IO1DAT(0) IO3 IEXCDIR1(0) IO2 IEXCDIR0(0) IO1 IEXCEN1(0) IO0 IEXCEN0(0) ՗21. IOस٪ഗ߳࿋‫ڦ‬ఁ‫ࢅ׬‬ᅪᅭ ࿋ࡽ IO7 IO6 ఁ‫׬‬ 0 IOEN IO5 ዁ IO4 IO2DAT/IO1DAT IO3 ዁ IO2 IEXCDIR1 ዁ IEXCDIR0 IO3 ዁ IO2 IEXCEN1 ዁ IEXCEN0 ௮ຎ ՂႷॽُ࿋Պ‫ྺײ‬இड0֍ీኟ‫߾׉‬ፕă ॽᆅগAIN6(+)/P1ࢅᆅগAIN6(−)/P2ದዃྺఇె๼෇ᆅগईຕጴ๼‫؜‬ᆅগăُ࿋ዃ1้Ljኄၵᆅগ ದዃྺຕጴ๼‫؜‬ᆅগP1ࢅຕጴ๼‫؜‬ᆅগP2ăُ࿋ൣ0้Ljኄၵᆅগದዃྺఇె๼෇ᆅগAIN6(+)ࢅ ఇె๼෇ᆅগAIN6(−)ă P2/P1ຕ਍ăIOENዃ1้Ljຕጴ๼‫؜‬ᆅগP1ࢅຕጴ๼‫؜‬ᆅগP2‫ڦ‬ຕ਍ႀ෇࿋IO2DATࢅ࿋IO1DATă ‫ୁۉ‬ᇸ‫ݛ‬ၠ჋ስ࿋ă IEXCDIR1 IEXCDIR0 0 0 ‫ୁۉ‬ᇸ‫ݛ‬ၠ ‫ୁۉ‬ᇸIEXC1૶থ‫ڟ‬ᆅগIOUT1ă‫ୁۉ‬ᇸIEXC2૶থ‫ڟ‬ᆅগIOUT2ă 0 ‫ୁۉ‬ᇸIEXC1૶থ‫ڟ‬ᆅগIOUT2ă‫ୁۉ‬ᇸIEXC2૶থ‫ڟ‬ᆅগIOUT1ă 1 ଇ߲‫ୁۉ‬ᇸ਩૶থ‫ڟ‬ᆅগIOUT1ăৈ‫ୁۉړ‬ᇸยྺ10 μAई210 μA้Lj ֍ሎႹኄᄣยዃă 1 1 ଇ߲‫ୁۉ‬ᇸ਩૶থ‫ڟ‬ᆅগIOUT2ăৈ‫ୁۉړ‬ᇸยྺ10 μAई210 μA้Lj ֍ሎႹኄᄣยዃă ኄၵ࿋ᆩઠ๑ీࢅ্ᆩ‫ୁۉ‬ᇸă໲்࣏੗ᅜ჋ስघ૤‫ڦୁۉ‬ኵă 1 0 IEXCEN1 0 0 1 1 IEXCEN0 0 1 0 1 ‫ୁۉ‬ᇸኵ घ૤‫্ୁۉ‬ᆩ 10 μA 210 μA 1 mA Rev. D | Page 24 of 36 AD7794/AD7795 ฿ۙस٪ഗ ஢ଉ‫ײ‬स٪ഗ RS2, RS1, RS0 = 1, 1, 0Ǘฉ‫ۉ‬/ް࿋ = 0x8000 (AD7795), 0x800000 (AD7794)) ฿ۙस٪ഗ๟ᅃ߲16࿋(AD7795)ई24࿋(AD7794)स٪ഗă ฿ۙस٪ഗԍ٪ADC‫ڦ‬฿ۙၯጚဣຕLjAD7794/AD7795‫ڦ‬ ฉ‫ްۉ‬࿋ኵ‫ݴ‬՚ྺ0x8000/0x800000ăAD7794/AD7795߳ᆶ ຺߲฿ۙस٪ഗăཚ‫ڢ‬AIN1዁ཚ‫ڢ‬AIN3ਏᆶጆᆩ฿ۙस ٪ഗLjܸཚ‫ڢ‬AIN4ĂAIN5ࢅAIN6ሶࠌᆩᅃ߲฿ۙस٪ ഗă߳स٪ഗ਩ྺ‫܁‬ႀस٪ഗăُस٪ഗᇑ၎࠲‫ڦ‬஢ଉ‫ײ‬ स٪ഗᅃཞ๑ᆩLjᅜࠓ‫ׯ‬स٪ഗ‫ܔ‬ăසࡕᆩࢽഔ‫ాۯ‬ևई ဣཥଭ‫ۉ‬ೝၯጚLjฉ‫ްۉ‬࿋ኵॽԥጲ‫߃ޮۯ‬ăႀ෇฿ۙस ٪ഗ้LjAD7794/AD7795ՂႷ‫ت‬ᇀู‫ۉ‬ఇ๕ई੣ှఇ๕ă RS2, RS1, RS0 = 1, 1, 1Ǘฉ‫ۉ‬/ް࿋ = 0x5XXX (AD7795), 0x5XXX00 (AD7794) ஢ଉ‫ײ‬स٪ഗ๟ᅃ߲16࿋(AD7795)ई24࿋(AD7794)स٪ ഗă஢ଉ‫ײ‬स٪ഗԍ٪ADC‫ڦ‬஢ଉ‫ײ‬ၯጚဣຕăAD7794/ AD7795߳ᆶ຺߲஢ଉ‫ײ‬स٪ഗăཚ‫ڢ‬AIN1ĂAIN2ࢅAIN3 ਏᆶጆᆩ஢ଉ‫ײ‬स٪ഗLjܸཚ‫ڢ‬AIN4ĂAIN5ࢅAIN6ሶࠌ ᆩᅃ߲स٪ഗă஢ଉ‫ײ‬स٪ഗྺ‫܁‬ႀस٪ഗăփࡗLjႀ෇ ஢ଉ‫ײ‬स٪ഗ้LjADCՂႷ‫ت‬ᇀู‫ۉ‬ఇ๕ई੣ှఇ๕ăኄ ၵस٪ഗሞฉ‫้ۉ‬๑ᆩ߾‫׍‬ၯጚ‫ڦ‬஢ଉ‫ײ‬ၯጚဣຕದዃ(ኴ ႜၯጚ้‫ڦ‬ሺᅮྺ1)ǗᅺُLj߳ഗॲਏᆶփཞ‫ڦ‬ఐණဣ ຕă჋ስాևएጚ‫ۉ‬უ้‫ڦ‬ဣຕᇑ჋ስྔևएጚ‫ۉ‬უ้‫ڦ‬ ဣຕփ၎ཞăසࡕᆩࢽഔ‫ాۯ‬ևईဣཥ஢ଉ‫ײ‬ၯጚLjईኁ ႀ෇஢ଉ‫ײ‬स٪ഗLj޿ఐණኵॽԥጲ‫߃ޮۯ‬ă Rev. D | Page 25 of 36 AD7794/AD7795 ኄၵ߸ႎ໏୲ူLj။հೕ୲ཞ้࿋ᇀ50 Hzࢅ60 Hz)९཮ 14*ă ADC‫ۉ‬ୟ႑တ ߁ຎ ߵ਍๼‫߸؜‬ႎ໏୲LjAD7794/AD7795ࣷ๑ᆩ୼ᆶփཞ‫୳ڦ‬ հഗLjᅜՍᆫࣅ‫ܔ‬ଉࣅሯำࢅഗॲሯำ‫ڦ‬ᅞ዆ă‫߸ړ‬ႎ໏ ୲ྺ4.17 Hz዁12.5 Hz้Lj๑ᆩSinc3୳հഗࢅ਩ኵ୳հഗă ‫߸ړ‬ႎ໏୲ྺ16.7 Hz዁39 Hz้Lj๑ᆩႪኟSinc3୳հഗă ‫߸ړ‬ႎ໏୲‫ڪ‬ᇀ16.7 Hz้Ljُ୳հഗ༵ࠃ50 Hz/60 Hzཞ้ ᅞ዆ă‫߸ړ‬ႎ໏୲ྺ50 Hz዁242 Hz้Lj๑ᆩSinc4୳հഗă ፌࢫLj‫߸ړ‬ႎ໏୲‫ڪ‬ᇀ470 Hz้Lj๑ᆩৈᆶओ‫୳ڦీࠀݴ‬ հഗă཮13዁཮16‫ݴ‬՚၂๖କቘհ๑ీఇ๕ူኍ‫ܔ‬ᅃၵ߸ ႎ໏୲‫ڦ‬փཞૌ႙୳հഗ‫ڦ‬ೕ୲ၚᆌ༬Ⴀăُఇ๕ူLjॺ ૬้क़ྺ߸ႎ໏୲‫ڦ‬2Ԡă཮17዁཮20၂๖କቘհ্ᆩఇ ๕ူ‫୳ڦ‬հഗၚᆌ༬Ⴀă AD7794/AD7795ྺ‫ࡼࠀگ‬ADCLjాዃΣ-Δۙ዆ഗĂ࣐؋ ഗĂएጚ‫ۉ‬უᇸĂᅏ՗‫ٷݣ‬ഗࢅೌాຕጴ୳հLjዷᄲᆩᇀ ֪ଉ੻‫ۯ‬ༀ‫ྷݔ‬Ă‫گ‬ೕ႑ࡽLj૩සუ૰‫ߌد‬ഗĂ‫ۉ‬ጱ‫ࢅ׹‬ ࿒‫֪܈‬ଉᆌᆩዐ‫ڦ‬႑ࡽă ௅߲ഗॲ‫ۼ‬ᆶ6ୟֶ‫ݴ‬๼෇Lj੗ᅜԥದዃྺ࣐؋ई࿮࣐؋ ఇ๕ăኄၵഗॲ૧ᆩ1.17 Vాևएጚ‫ۉ‬უᇸईྔևएጚ‫ۉ‬ უᇸ߾ፕă཮12၂๖କഗॲ߾ፕ໯Ⴔ‫ڦ‬एԨ૶থă AD7794/AD7795‫ڦ‬๼‫؜‬໏୲(fADC)๟ᆩࢽ੗Պ‫ڦײ‬ă՗19ଚ ‫؜‬କቘհ๑ీ้ඹႹ‫߸ڦ‬ႎ໏୲ᅜत‫ܔ‬ᆌ‫ॺڦ‬૬้क़ăቘ հ্ᆩ้LjඹႹ‫߸ڦ‬ႎ໏୲ԍ‫׼‬փՎLj‫ॺڍ‬૬้क़‫ڪ‬ᇀ 1/fADCă‫׉‬ఇᅞ዆๟ຕጴ୳հഗ‫ڦ‬ዷᄲࠀీă‫߸ړ‬ႎ໏୲ྺ 16.7 Hzई߸‫้گ‬Lj50 Hz/60 Hzཞ้ᅞ዆ၳࡕፌॅLjᅺྺሞ VDD REFIN1(+) GND IN+ OUT– AD7794/AD7795 AIN1(+) AIN1(–) IN+ OUT– OUT+ AVDD VDD IN– OUT+ AIN2(+) AIN2(–) IN– AIN3(+) MUX BUF IN-AMP Σ-Δ ADC SERIAL INTERFACE AND LOGIC CONTROL DOUT/RDY DIN SCLK CS AIN3(–) GND REFIN2(+) VDD REFIN2(–) IOUT1 INTERNAL CLOCK DVDD REFIN1(–) PSW 04854-012 RCM GND CLK ཮12.एԨ૶থ཮ Rev. D | Page 26 of 36 AD7794/AD7795 0 0 –10 –20 –20 (dB) (dB) –40 –30 –60 –40 –80 0 20 40 60 80 –60 120 100 04854-020 04854-017 –100 –50 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 FREQUENCY (Hz) FREQUENCY (Hz) ཮13. ୳հഗၚᆌ(4.17 Hz߸ႎ໏୲Ljቘհ๑ీ) ཮16. ୳հഗၚᆌ(470 Hz߸ႎ໏୲Ljቘհ๑ీ) 0 –20 –20 –40 –40 –60 –80 –80 –100 04854-018 –60 0 20 40 60 80 100 120 140 160 180 –100 200 04854-021 (dB) (dB) 0 0 20 40 FREQUENCY (Hz) 60 80 100 120 FREQUENCY (Hz) ཮14. ୳հഗၚᆌ(16.7 Hz߸ႎ໏୲Ljቘհ๑ీDž ཮17. ୳հഗၚᆌ(4.17 Hz߸ႎ໏୲Ljቘհ্ᆩDž 0 –20 –20 –40 –40 –60 –80 –80 –100 04854-019 –60 0 500 1000 1500 2000 2500 –100 3000 FREQUENCY (Hz) 04854-022 (dB) (dB) 0 0 20 40 60 80 100 120 140 160 180 FREQUENCY (Hz) ཮15. ୳հഗၚᆌ(242 Hz߸ႎ໏୲Ljቘհ๑ీDž ཮18. ୳հഗၚᆌ(16.7 Hz߸ႎ໏୲Ljቘհ্ᆩDž Rev. D | Page 27 of 36 200 AD7794/AD7795 0 –20 (dB) –40 –60 –100 04854-023 –80 0 500 1000 1500 2000 2500 3000 FREQUENCY (Hz) ཮19. ୳հഗၚᆌ(242 Hz߸ႎ໏୲Ljቘհ্ᆩ) 0 –10 (dB) –20 –40 04854-024 –50 0 ཮3ࢅ཮4၂๖କᇑAD7794/AD7795৊ႜথ੨‫้ڦ‬Ⴞ཮Ljഄ ዐCSᆩᇀ঴ஓഗॲă཮3၂๖‫ܔ‬AD7794/AD7795‫ڦ‬๼‫؜‬ᅎ ࿋स٪ഗኴႜ‫֡܁‬ፕ‫้ڦ‬ႾLj཮4၂๖‫ܔ‬๼෇ᅎ࿋स٪ഗ ኴႜႀ֡ፕ‫้ڦ‬Ⴞăन๑ሞ‫ڼ‬ᅃْ‫֡܁‬ፕኮࢫDOUT/RDY ၍ୟ‫ۉߛڟ࣮ݓ‬ೝLjᄺ੗ᅜ‫ْٗܠ‬ຕ਍स٪ഗዐ‫܁‬ൽ‫؜‬၎ ཞ‫ڦ‬ጴăփࡗLjՂႷඓԍሞူᅃ๼‫߸؜‬ႎ݀ิኮമLjኄၵ ‫֡܁‬ፕᅙྜ‫ׯ‬ă૶Ⴤ‫܁‬ൽఇ๕ူLjኻీٗຕ਍स٪ഗ‫܁‬ൽ ᅃْă ॽCSᇑ‫ۉگ‬ೝ၎૶้Lj‫ز‬ႜথ੨੗ᅜሞෙ၍๕ఇ๕ူ߾ ፕăُ้LjSCLKĂDINࢅDOUT/RDY၍ୟᆩઠᇑAD7794/ AD7795ཚ႑ă੗ᅜᆩጒༀस٪ഗዐ‫ڦ‬RDY࿋॔๫ገ࣑๟‫ޏ‬ ঳ຐăኄዖ‫ݛ‬ӄ๢ࢇᇑྲ੦዆ഗ৊ႜথ੨ăසࡕCSႴᄲᆩ ፕ঴ஓ႑ࡽLj੗ᅜᆩ੨၍ׂิ޿႑ࡽă‫ܔ‬ᇀྲ੦዆ഗথ ੨LjॺᅱSCLKሞຕ਍‫د‬๼ዐ‫ڦ‬੣ှ้ߛ‫ۉ‬ೝጒༀă –30 –60 ഗ ዐ Lj DOUT/RDYሶ ᆩ ᇀ ٗ ೌ ా स ٪ ഗ ዐ इ ൽ ຕ ਍ ă SCLK๟ഗॲ‫زڦ‬ႜ้ዓ๼෇Lj໯ᆶຕ਍‫د‬๼(࿮ஃ๟DIN ฉ ࣏ ๟ DOUT/RDYฉ )਩ ၎ ‫ ܔ‬ᇀ SCLK႑ ࡽ ৊ ႜ ă DOUT/RDYᆅগᄺ੗ᆩፕຕ਍৽Ⴣ႑ࡽǗ‫ړ‬๼‫؜‬स٪ഗዐ ᆶႎຕ਍ጴ੗ᆩ้Lj޿၍ୟՎྺ‫ۉگ‬ೝă‫ܔ‬ຕ਍स٪ഗ‫ڦ‬ ‫֡܁‬ፕྜ‫้ׯ‬Lj޿၍ୟް࿋ྺߛ‫ۉ‬ೝăຕ਍स٪ഗ߸ႎኮ മLj޿၍ୟᄺࣷՎྺߛ‫ۉ‬ೝLjᅜ༵๖ُ้փᆌ‫܁‬ൽഗॲLj ඓԍस٪ഗኟሞ߸ႎ้փࣷ݀ิຕ਍‫܁‬ൽ֡ፕă ᆩᇀ჋ስ ഗॲăሞ‫߲ܠ‬ഗॲᇑ‫ز‬ႜጺ၍၎૶‫ڦ‬ဣཥዐLj੗ᅜᆩCS‫ܔ‬ AD7794/ AD7795৊ႜ঴ஓă 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 AD7794/AD7795੗ᅜሞCSᆩፕኡཞօ႑ࡽ‫ڦ‬൧઄ူ߾ፕă ኄዖ‫ݛ‬ӄ๢ᆩᇀDSPথ੨ăُ้LjᆯᇀሞDSPዐLjCSᅃӯ ‫؜‬၄ሞSCLK‫ူڦ‬ইᄂኮࢫLjᅺُ‫ڼ‬ᅃ࿋(MSB)ࣷԥCSᆶၳ ‫ں‬ໃ‫؜‬ăኻᄲፏ๰้Ⴞຕᄲ൱LjSCLKՍ੗ሞຕ਍ገ࣑ኮक़ ૶Ⴤሏႜă FREQUENCY (Hz) ཮20. ୳հഗၚᆌ(470 Hz߸ႎ໏୲Ljቘհ্ᆩ) ຕጴথ੨ සമ࿔‫ాೌڦ‬स٪ഗև‫ݴ‬໯ຎLjAD7794/AD7795‫ڦ‬੗Պ‫ײ‬ ࠀీᆯᅃဣଚೌాस٪ഗ੦዆ăຕ਍ཚࡗ‫ز‬ႜথ੨ႀ෇ኄ ၵस٪ഗăُথ੨࣏༵ࠃ‫ܔ‬ኄၵೌాस٪ഗ‫܁ڦ‬ൽ‫ݡ‬࿚ă ᇑഗॲ‫ڦ‬໯ᆶཚ႑਩ՂႷᅜ‫ܔ‬ཚ႑स٪ഗ‫ڦ‬ႀ֡ፕਸ๔ă ฉ‫ۉ‬ईް࿋ኮࢫLjഗॲ೺‫ܔځ‬ഄཚ႑स٪ഗኴႜႀ֡ፕă ႀ෇ُस٪ഗ‫ڦ‬ຕ਍ਦۨူᅃ߲֡ፕ๟‫֡܁‬ፕ࣏๟ႀ֡ ፕLjᅜतُ‫֡܁‬ፕईႀ֡ፕ݀ิሞనᅃ߲स٪ഗฉăᅺ ُLj‫ܔ‬ഄ໲स٪ഗ‫ڦ‬ႀ෇‫ݡ‬࿚๟ᅜ‫ܔ‬ཚ႑स٪ഗ‫ڦ‬ႀ֡ፕ ਸ๔Lj඗ࢫ๟‫ܔ‬჋ۨ‫ڦ‬स٪ഗኴႜႀ֡ፕă‫ܔ‬ഄ໲स٪ഗ ‫֡܁ڦ‬ፕ(჋ስ૶Ⴤ‫܁‬ൽఇ๕‫)ྔأ‬๟ᅜ‫ܔ‬ཚ႑स٪ഗ‫ڦ‬ႀ ֡ፕਸ๔Lj඗ࢫ๟‫ܔ‬჋ۨ‫ڦ‬स٪ഗኴႜ‫֡܁‬ፕă ‫ܔ‬DIN๼෇ႀ෇ᅃ૶‫ز‬1Lj੗ᅜ๑޿‫ز‬ႜথ੨ް࿋ăසࡕॽ இड1ႀ෇AD7794/AD7795၍ୟժ‫׼‬Ⴤ዁ณ32߲‫ز‬ႜ้ዓ ዜ೺Lj޿‫ز‬ႜথ੨Սࣷް࿋ăසࡕ෉ॲ‫ٱ‬ဃईဣཥࠤቱ‫ڞ‬ ዂথ੨้Ⴞ‫ٱ‬ဃLjኄዖ‫ॽ݆ݛ‬੗ඓԍথ੨ް࿋‫ڟ‬ᅙኪጒ ༀăް࿋๑থ੨‫ܔځڪڟ࣮ݓ‬ཚ႑स٪ഗኴႜႀ֡ፕ‫ڦ‬ጒ ༀă޿֡ፕࣷॽ໯ᆶस٪ഗ‫ాڦ‬ඹް࿋‫ڟ‬ഄฉ‫ۉ‬ኵăް࿋ ኮࢫLjᆩࢽᆌ‫ځڪ‬500 μs֍ీ‫ݡ‬࿚‫ز‬ႜথ੨ă AD7794/AD7795੗ᅜದዃྺ૶Ⴤገ࣑ఇ๕ई‫ْڇ‬ገ࣑ఇ๕ (֖९཮21዁཮23)ă AD7794/AD7795‫زڦ‬ႜথ੨Ԉࡤ຺߲႑ࡽǖCSĂDINĂ SCLKĂDOUT/RDYăDIN၍ୟᆩᇀॽຕ਍‫د‬๼዁ೌాस٪ Rev. D | Page 28 of 36 AD7794/AD7795 CS DIN 0x08 0x200A 0x58 DATA 04854-014 DOUT/RDY SCLK ཮21.‫ْڇ‬ገ࣑ CS 0x58 0x58 DIN DATA DATA 04854-015 DOUT/RDY SCLK ཮22.૶Ⴤገ࣑ CS 0x5C DIN DATA DATA DATA 04854-016 DOUT/RDY SCLK ཮23.૶Ⴤ‫܁‬ൽ Rev. D | Page 29 of 36 AD7794/AD7795 ‫ْڇ‬ገ࣑ఇ๕ ૶Ⴤ‫܁‬ൽ ‫ْڇ‬ገ࣑ఇ๕ူLjAD7794/AD7795ሞଇْገ࣑ኮक़‫ت‬ᇀ࠲܏ ఇ๕ăॽఇ๕स٪ഗዐ‫ڦ‬MD2ĂMD1ࢅMD0‫ݴ‬՚ยዃྺ0Ă 0Ă1LjՍ੗ഔ‫ْڇۯ‬ገ࣑Ljُ้AD7794/AD7795ॽฉ‫ۉ‬Lj ኴႜ‫ْڇ‬ገ࣑Lj඗ࢫ‫܏࠲࣮ݓ‬ఇ๕ăೌాና‫ږ‬ഗฉ‫ۉ‬Ⴔᄲ 1 msăገ࣑Ⴔᄲ2 × tADC‫้ڦ‬क़ăྜ‫ׯ‬ገ࣑ࢫLjDOUT/RDY Վྺ‫ۉگ‬ೝઠፕྺኸ๖ăٗຕ਍स٪ഗዐ‫܁‬ൽຕ਍ጴࢫLj DOUT/RDYՎྺߛ‫ۉ‬ೝăසࡕCSྺ‫ۉگ‬ೝLjDOUT/RDY ॽԍ‫ۉߛ׼‬ೝLj኱‫ڟ‬ᆼഔ‫ۯ‬ժྜ‫ׯ‬ᅃْገ࣑ྺኹăසࡕႴ ᄲLjन๑DOUT/RDYᅙՎྺߛ‫ۉ‬ೝLjᄺ੗ᅜ‫܁ْܠ‬ൽຕ਍ स٪ഗă ੗ᅜ‫ܔ‬AD7794/AD7795৊ႜದዃLj๑‫ڥ‬௅ْገ࣑ྜ‫้ׯ‬Lj ገ࣑঳ࡕࣷጲ‫ۯ‬ዃᇀDOUT/DRY၍ୟฉLjܸ࿮Ⴔ௅ْႀ෇ ཚ႑स٪ഗᅜ‫ݡ‬࿚ຕ਍ăॽ01011100ႀ෇ཚ႑स٪ഗࢫLj ᆩࢽኻႴྺADC༵ࠃ๢‫ڦړ‬SCLKዜ೺ຕLjኄᄣ‫ړ‬ገ࣑ྜ ‫้ׯ‬Lj24࿋ጴՍࣷጲ‫ۯ‬ዃᇀDOUT/DRY၍ୟฉăADCᆌದ ዃྺ૶Ⴤገ࣑ఇ๕ă ૶Ⴤገ࣑ఇ๕ ኄዖఇ๕ူLjຕ਍ኻీԥ‫܁‬ൽᅃْLjܸ൐ᆩࢽՂႷඓԍຕ ਍ጴ‫܁ڦ‬ൽራᇀူᅃገ࣑ྜ‫ׯ‬ăසࡕሞူᅃገ࣑ྜ‫ׯ‬ኮ മLjᆩࢽช࿄‫܁‬ൽገ࣑঳ࡕLjईኁྺAD7794/AD7795༵ࠃ ‫زڦ‬ႜ้ዓຕփፁᅜ‫܁‬ൽገ࣑ጴLjሶ‫ူړ‬ᅃገ࣑ྜ‫้ׯ‬Lj ‫ز‬ႜ๼‫؜‬स٪ഗॽް࿋Ljႎገ࣑঳ࡕॽዃᇀ๼‫ز؜‬ႜस٪ ഗዐă ኄ๟ฉ‫ۉ‬ఐණఇ๕ăAD7794/AD7795૶Ⴤገ࣑Lj௅ْገ࣑ ྜ‫้ׯ‬Ljጒༀस٪ഗዐ‫ڦ‬RDY࿋Վྺ‫گ‬ăසࡕCSྺ‫ۉگ‬ ೝLjሶ‫ړ‬ᅃْገ࣑ྜ‫้ׯ‬LjDOUT/RDY၍ୟᄺࣷՎྺ‫ۉگ‬ ೝăැᄲ‫܁‬ൽገ࣑঳ࡕLjᆩࢽႴᄲႀ෇ཚ႑स٪ഗLjኸ๖ ူᅃ֡ፕྺ‫܁‬ൽຕ਍स٪ഗăᅃ‫ॽڋ‬SCLKஞ؋แेᇀ ADCLjຕጴገ࣑৽૬न‫؜‬၄ሞDOUT/RDYᆅগฉă‫܁‬ൽገ ࣑঳ࡕࢫLjDOUT/RDY࣮‫ۉߛڟ‬ೝăසႴᄲLjᆩࢽ੗ᅜ‫ܠ‬ ْ‫܁‬ൽ޿स٪ഗă‫ڍ‬๟LjᆩࢽՂႷඓԍሞူᅃገ࣑ྜ‫ׯ‬ ้Ljփᄲ‫ܔ‬ຕ਍स٪ഗ৊ႜ‫ݡ‬࿚Lj‫ޏ‬ሶLjႎ‫ڦ‬ገ࣑঳ࡕॽ ۪฿ă ‫ړ‬DOUT/DRYՎྺ‫ۉگ‬ೝLj༵๖ገ࣑ᅙ঳ຐ้LjՂႷྺ ADC༵ࠃፁࠕ‫ڦ‬SCLKዜ೺ຕă඗ࢫLjຕ਍ገ࣑঳ࡕՍࣷ ዃᇀDOUT/DRY၍ୟฉă‫܁‬ൽገ࣑঳ࡕࢫLjDOUT/DRY‫ݓ‬ ࣮‫ۉߛڟ‬ೝLj኱‫ူڟ‬ᅃገ࣑঳ࡕ੗ᆩྺኹă ැᄲཽ‫૶؜‬Ⴤ‫܁‬ൽఇ๕LjՂႷሞDRYᆅগྺ‫ۉگ‬ೝ้ॽኸ ସ01011000ႀ෇ཚ႑स٪ഗăሞ૶Ⴤ‫܁‬ൽఇ๕ူLjADCࣷ ॔੦DIN၍ୟฉ‫ڦ‬ऄ‫ۯ‬LjᅜՍీথ๭ኸସᅜཽ‫૶؜‬Ⴤ‫܁‬ൽ ఇ๕ăُྔLjසࡕDINฉ‫؜‬၄32߲૶Ⴤ1LjADCॽް࿋ăᅺ ُLjሞ૶Ⴤ‫܁‬ൽఇ๕ူLjDINᆌԍ‫ۉگ׼‬ೝLj኱‫ڟ‬ᆶኸସ ॽᄲႀ෇ഗॲă Rev. D | Page 30 of 36 AD7794/AD7795  ‫ۉ‬ୟ௮ຎ ఇె๼෇ཚ‫ڢ‬ AD7794/AD7795ᆶ6ֶ߲‫ݴ‬ఇె๼෇ཚ‫ڢ‬ă‫ړ‬ഗॲᅜ࣐؋ ఇ๕߾ፕ้Ljኄၵཚ‫૶ڢ‬থ‫࣐ాೌڟ‬؋‫ٷݣ‬ഗăሞ࿮࣐؋ ఇ๕ူLjኄၵཚ‫ڢ‬኱থ૶‫ۙڟ‬዆ഗăሞ࣐؋ఇ๕ူ(ದዃस ٪ഗዐ‫ڦ‬BUF࿋ยዃྺ1)Lj๼෇ཚ‫ڢ‬ઍ෇࣐؋‫ٷݣ‬ഗ‫ߛڦ‬ ፆੇ๼෇पăᅺُLj๼෇‫ࠕీ܋‬ఱ๴ড‫ڦٷ‬ᇸፆੇLj๢ࢇ ᇑྔևፆႠ‫ߌد‬ഗ኱থ၎૶Lj૩සᆌՎऺई‫ۉ‬ፆ๕࿒‫܈‬ॠ ֪ഗ(RTD)‫ڪ‬ă ‫ړ‬BUF = 0้Ljഗॲᅜ࿮࣐؋ఇ๕߾ፕăኄॽ‫ڞ‬ዂডߛ‫ڦ‬ఇ ె๼෇‫ୁۉ‬ă൩ጀᅪLj޿࿮࣐؋๼෇ୟ০‫ܔ‬ൻ‫ۯ‬ᇸ‫װ‬၄‫؜‬ ‫ۯ‬ༀ‫޶ڦ‬ሜăᅺُLj๼෇ᆅগฉ‫ۉڦ‬ፆᇑ‫ۉ‬ඹፇࢇ੗ీࣷ ᆅഐሺᅮဃֶLjਏ༹ൽਦᇀൻ‫ۯ‬ADC๼෇‫ڦ‬႑ࡽᇸ‫ڦ‬๼‫؜‬ ፆੇă՗22၂๖କྺሞ20࿋‫ݴ‬Ր୲຤ೝ้փዂᆅ෇ሺᅮဃ ֶLj࿮࣐؋ఇ๕ူྔև‫ۉ‬ፆ/‫ۉ‬ඹ‫ڦ‬ඹႹኵă ՗22. 20࿋้࿮ሺᅮဃֶ‫ྔڦ‬ևR-Cፇࢇ ‫ۉ‬ඹ(pF) 50 100 500 1000 5000 ‫ۉ‬ፆ(Ω) 9k 6k 1.5 k 900 200 ᅏ՗‫ٷݣ‬ഗ ఇె๼෇႑ࡽ‫ٷݣ‬1Ԡई2ԠLj๟ሞAD7794/AD7795ాཚࡗ ຕጴ‫ݛ‬๕ํ၄ă‫ڍ‬๟Lj‫ړ‬ሺᅮྺ4ई߸ߛ้Lj࣐؋ഗ๼‫؜‬ ॽแेᇀೌాᅏ՗‫ٷݣ‬ഗ‫ڦ‬๼෇‫܋‬ă޿‫گ‬ሯำᅏ՗‫ٷݣ‬ഗ ‫ڦ‬٪ሞᅪ࿆ጣၭ‫ޗ‬ኵ႑ࡽ੗ᅜሞAD7794/AD7795ా‫ٷݣ‬Lj ཞ้ධ඗ԍ‫؜׼‬෥‫ڦ‬ሯำႠీă૩සLj‫ړ‬ሺᅮยዃྺ64 ้Lj਩‫ߵݛ‬ሯำ‫ۆ‬႙ኵྺ40 nVLjኄ၎‫ړ‬ᇀ21࿋ᆶၳ‫ݴ‬Ր୲ ई18.5࿋‫ރރ‬ኵ‫ݴ‬Ր୲ă ૧ᆩದዃस٪ഗዐ‫ڦ‬G2࿋዁G0࿋Lj੗ᅜॽAD7794/AD7795 ‫ڦ‬ሺᅮยዃྺ1Ă2Ă4Ă8Ă16Ă32Ă64ई128ăᅺُLj ֑ᆩ2.5 Vྔևएጚ‫ۉ‬უᇸ้Lj‫ڇ‬टႠ‫ྺྷݔ‬0mV-20mV዁ 0V-2.5VLjມटႠ‫ྷݔ‬ሶྺ±20 mV዁±2.5 Vă‫ړ‬ᅏ՗‫ٷݣ‬ഗ ᆶၳ้)ሺᅮ ≥ 4*Ljሞቘհ๑ీ‫ڦ‬൧઄ူLjࠌఇ‫ۉ‬უ((AIN (+) + AIN(−))/2)ՂႷ‫ٷ‬ᇀई‫ڪ‬ᇀ0.5 Văසࡕቘհ্ᆩLjժ ൐AMP-CM࿋ዃ1ᅜ‫ݞ‬ኹࠌఇᅞ዆ႠీူইLjሶඹႹ‫ࠌڦ‬ ఇ‫ۉ‬უ၌ᇀᅜူଇ߲ኵኮक़ǖ 0.2 + (Gain/2 × (AIN(+) − AIN(−))) ࢅ AVDD − 0.2 − (Gain/2 × (AIN(+) − AIN(−))) ৈ‫ړ‬ሺᅮྺ1ई2้LjAD7794/AD7795֍ీᅜ࿮࣐؋ఇ๕߾ ፕă‫ړ‬ሺᅮ߸ߛ้Lj࣐؋ഗጲ‫ۯ‬๑ీă࣐؋ఇ๕ူLjਨ‫ܔ‬ ๼෇‫ۉ‬უ‫ྷݔ‬၌ᇀGND + 100 mV዁AVDD – 100 mVኮक़ă‫ړ‬ ሺᅮยྺ4ई߸ߛ้Ljᅏ՗‫ٷݣ‬ഗ๑ీă‫ړ‬ᅏ՗‫ٷݣ‬ഗᆶ ၳ้Ljਨ‫ܔ‬๼෇‫ۉ‬უ‫ྷݔ‬၌ᇀGND + 300 mV዁AVDD – 1.1 V ኮक़ăยዃࠌఇ‫ۉ‬უ้ՂႷၭ႐Ljඓԍփᄲ‫ࡗג‬ኄၵ၌ ኵă‫ޏ‬ሶLj၍Ⴀ‫ࢅ܈‬ሯำႠీࣷူইă ࿮࣐؋ఇ๕ူLjਨ‫ܔ‬๼෇‫ۉ‬უԈࡤGND – 30 mV዁AVDD + 30 mVኮक़‫ۉڦ‬უă޶ਨ‫ܔ‬๼෇‫ۉ‬უ၌ኵྺ॔੦၎‫ܔ‬ᇀGND ‫ڦ‬ኈມटႠၭ႑ࡽ༵ࠃକཉॲă සࡕAD7794/AD7795֑ᆩኵᇑAVDD၎‫ྔڦڪ‬ևएጚ‫ۉ‬უ ᇸLjሶሞᅏ՗‫ٷݣ‬ഗᆶၳ‫ڦ‬൧઄ူLjྺକኟ‫߾׉‬ፕLjఇె ๼෇႑ࡽՂႷփ‫ࡗג‬VREF/ሺᅮ‫ڦ‬90%ă ມटႠ/‫ڇ‬टႠದዃ AD7794/AD7795‫ڦ‬ఇె๼෇‫܋‬੗ᅜথ๴‫ڇ‬टႠईມटႠ๼ ෇‫ۉ‬უ‫ྷݔ‬ăມटႠ๼෇‫ྷݔ‬ժփ՗๖ഗॲ੗ᅜఱ๴၎‫ܔ‬ ᇀဣཥGND‫ۉ޶ڦ‬უăAIN(+)๼෇‫ڦ܋‬ມटႠࢅ‫ڇ‬टႠ႑ ࡽᅜAIN(−)๼෇‫ۉڦ܋‬უྺएጚă૩සLjසࡕAIN(−)ྺ 2.5 VLjADCದዃྺ‫ڇ‬टႠఇ๕Ljժ൐ሺᅮྺ1LjሶAIN(+) ᆅগ‫ڦ‬๼෇‫ۉ‬უ‫ྺྷݔ‬2.5 V዁5 Vă සࡕADCದዃྺມटႠఇ๕LjሶAIN(+)๼෇‫ڦ܋‬ఇె๼෇ ‫ྺྷݔ‬0 V዁5 VăມटႠ/‫ڇ‬टႠ჋ၜ੗ཚࡗ‫ܔ‬ದዃस٪ഗ ዐ‫ڦ‬U/B࿋৊ႜՊ‫ײ‬ઠ჋ስă Rev. D | Page 31 of 36 AD7794/AD7795 ຕ਍๼‫؜‬Պஓ घ૤‫ୁۉ‬ ‫ړ‬ADCದዃྺ‫ڇ‬टႠ߾ፕఇ๕้Lj๼‫؜‬ஓྺܾ৊዆ᇱஓLj ଭֶ‫ݴ‬๼෇‫ۉ‬უ‫ܔ‬ᆌ‫ڦ‬ஓྺ00...00Ljዐक़‫ۉ‬ೝ‫ۉ‬უ‫ܔ‬ᆌ‫ڦ‬ ஓྺ100...000Lj஢ଉ‫ײ‬๼෇‫ۉ‬უ‫ܔ‬ᆌ‫ڦ‬ஓྺ111...111ăඪᅪ ఇె๼෇‫ۉ‬უ‫ڦ‬๼‫؜‬ஓ੗ᅜ՗๖ྺǖ AD7794/AD7795࣏ాዃଇ߲೅ದ‫ॲ෉ڦ‬੗ದዃ࢛ୁᇸLjഄ๼ ‫ୁۉ؜‬੗ཚࡗՊ‫ײ‬ยྺ10 μAĂ210 μAई1 mAăઠጲAVDD‫ڦ‬ ኄଇ߲ᇸ‫ୁۉ‬኱থໃ‫ڟ‬ഗॲ‫ڦ‬IOUT1ईIOUT2ᆅগăኄၵ ‫ୁۉ‬ᇸཚࡗIOस٪ഗዐ‫ڦ‬ದዃ࿋৊ႜ੦዆ă૧ᆩದዃ࿋੗ ᅜ๑ీ‫ୁۉ‬ᇸLjॽ‫ୁۉ‬ᇸ‫ڞ‬ၠIOUT1ईIOUT2Ljᅜत჋ስ ‫ୁۉ‬ኵăኄၵ‫ୁۉ‬ᇸ੗ᅜᆩઠघ૤ྔևፆႠ‫ൃۉ‬ईRTD‫د‬ ߌഗă Code = (2N × AIN × GAIN)/VREF ‫ړ‬ADCದዃྺມटႠ߾ፕఇ๕้Lj๼‫؜‬ஓྺܾ৊዆ೋᅎ ஓLj޶஢ଉ‫ۉײ‬უ‫ܔ‬ᆌ‫ڦ‬ஓྺ000...000Ljଭֶ‫ݴ‬๼෇‫ۉ‬უ ‫ ܔ‬ᆌ ‫ ڦ‬ஓ ྺ 100...000Lj ኟ ஢ ଉ ‫ ײ‬๼ ෇ ‫ ۉ‬უ ‫ ܔ‬ᆌ ‫ ڦ‬ஓ ྺ 111...111ăඪᅪఇె๼෇‫ۉ‬უ‫ڦ‬๼‫؜‬ஓ੗ᅜ՗๖ྺǖ Code = 2N-1 × [(AIN × GAIN/VREF) + 1] ഄዐǖ AINྺఇె๼෇‫ۉ‬უă GAINྺᅏ՗‫ٷݣ‬ഗሺᅮยዃDŽ1዁128Džă N = 24. භ܏‫ୁۉ‬ AD7794/AD7795ాዃଇ߲100 nA࢛ୁ݀ิഗLjᅃ߲༵ࠃٗ AVDD‫ڟ‬AIN(+)‫ڦ‬ᇸ‫ୁۉ‬Ljᅃ߲༵ࠃٗAIN(−)‫ڟ‬GND‫ڦ‬ဌ ‫ୁۉ‬ăኄၵ‫ୁۉ‬ൎ࣑዁჋ۨ‫ڦ‬ఇె๼෇‫ܔ‬ăኄଇ߲‫ୁۉ‬ई ਸई࠲Ljൽਦᇀದዃस٪ഗዐ‫ڦ‬භ܏‫ୁۉ‬๑ీ(BO)࿋ă‫׈‬ ๬ሞఇె๼෇ཚ‫ڢ‬ฉኴႜ֪ଉኮമLj੗ᅜ๑ᆩኄၵ‫ୁۉ‬ઠ ඓණྔև‫ߌد‬ഗ๟‫ޏ‬ኟ‫߾׉‬ፕăথཚභ܏‫ࢫୁۉ‬Lj‫ୁୁۉ‬ ෇ྔև‫ߌد‬ഗ‫ۉ‬ୟLj඗ࢫՍ੗ሞఇె๼෇ཚ‫ڢ‬ฉ֪ଉ๼෇ ‫ۉ‬უăසࡕ֪‫ۉڦڥ‬უྺ஢ଉ‫ײ‬LjᆩࢽႴᄲඓණྺࢆස ُă஢ଉ‫܁ײ‬ຕ੗ీᅪ࿆ጣമ‫ߌد܋‬ഗਸୟLjᄺ੗ీ๟മ ‫ߌد܋‬ഗࡗሜLjཚࡗ஢ଉ‫ײ‬๼‫؜‬՗၄‫؜‬ઠǗईኁඍณएጚ ‫ۉ‬უLjժ൐NOXREF࿋ᅙዃ1Lj‫ڞ‬ዂຕ਍ഭ࿋ሞඇ1ă ‫ړ‬๼‫ྺ؜‬ඇ1้LjᆩࢽႴᄲॠֱኄෙዖ൧઄Lj඗ࢫፔ‫؜‬ಒ ܏ăසࡕ֪‫ۉڦڥ‬უྺ0 VLjሶ੗ీ๟‫ߌد‬ഗ‫܌‬ୟăኟ‫߾׉‬ ፕ้Ljᆌॽ0ႀ෇ದዃस٪ഗዐ‫ڦ‬BO࿋Ljᅜ࠲Կኄၵභ܏ ‫ୁۉ‬ă‫ୁۉ‬ᇸ߾ፕሞᅃӯਨ‫ܔ‬๼෇‫ۉ‬უ‫ాྷݔ‬Lj࣐؋ഗਸ ഔă ೋዃ‫ۉ‬უ݀ิഗ AD7794/AD7795ాዃᅃ߲ೋዃ‫ۉ‬უ݀ิഗă໲ॽ჋ۨ๼෇ ཚ ‫ ܋ ޶ ڦ ڢ‬ೋ ዃ ‫ ڟ‬AVDD/2ă ُ ࠀ ీ ሞ ๼ ෇ AIN1(−)዁ AIN3(−)ฉ੗ᆩă໲ሞඤ‫ۉ‬౾ᆌᆩዐ࢔ᆶᆩLjᅺྺ‫ړ‬ሺᅮ ‫ٷ‬ᇀ2้Ljඤ‫ۉ‬౾໯ׂิ‫ۉڦ‬უՂႷ၎‫ܔ‬ᇀగ߲኱ୁ‫ۉ‬უ ೋዃăೋዃኮ໯ᅜᆶՂᄲLj๟ᅺྺᅏ՗‫ٷݣ‬ഗႴᄲᅃۨ‫ڦ‬ ᇧଉăසࡕுᆶᇧଉLjথৎGNDईAVDD‫ڦ‬႑ࡽॽփీ৛ ඓገ࣑ă ೋዃ‫ۉ‬უ݀ิഗᆯದዃस٪ഗዐ‫ڦ‬VBIAS1࿋ĂVBIAS0࿋ ࢅBOOST࿋ࠌཞ੦዆ăೋዃ‫ۉ‬უ݀ิഗ‫ڦ‬ฉ‫้ۉ‬क़ൽਦᇀ ޶ሜ‫ۉ‬ඹăྺକ๢ᆌডߛ‫޶ڦ‬ሜ‫ۉ‬ඹLjAD7794/AD7795ದ ᆶBOOST࿋ă‫ُړ‬࿋ዃ1้Ljೋዃ‫ۉ‬უ݀ิഗ‫༵ࡼࠀڦ‬ ߛLjฉ‫้ۉ‬क़ॽ‫ޗٷ‬໫‫܌‬ă཮11၂๖କBOOST‫ڪ‬ᇀ0ࢅ BOOST‫ڪ‬ᇀ1้Ljփཞ޶ሜ‫ۉ‬ඹူ‫ڦ‬ฉ‫้ۉ‬क़ă‫ړ‬ೋዃ‫ۉ‬ უ݀ิഗ๑ీ൐BOOST‫ڪ‬ᇀ0้LjAD7794/AD7795‫ࡼࠀڦ‬ ༵ߛ40 μAă‫ړ‬BOOSTࠀీഔᆩ้Ljഗॲࠀࡼ༵ߛ250 μAă एጚ‫ۉ‬უ AD7794/AD7795ਏᆶഴ෇๕1.17 Vएጚ‫ۉ‬უᇸLj੗ᅜᆩઠྺ ADC༵ࠃएጚ‫ۉ‬უLj‫ړ‬඗ᄺ੗ᅜแेྔևएጚ‫ۉ‬უă޿ഴ ෇๕एጚ‫ۉ‬უᇸਏᆶ‫گ‬ሯำĂ‫گ‬࿒೏༬ႠLj࿒೏‫ۆ‬႙ኵྺ 4 ppm/°Că‫ܔ‬ᇀྔևएጚ‫ۉ‬უཚ‫ڢ‬LjADCਏᆶྜඇֶ‫ݴ‬๼෇ ీ૰ăُྔLjᆩࢽ੗ᅜٗଇዖྔևएጚ‫ۉ‬უ჋ၜዐ჋ስഄ ᅃ(REFIN1ईREFIN2)ă๑ᆩದዃस٪ഗዐ‫ڦ‬REFSEL1ࢅ REFSEL0࿋੗ᅜ჋ስAD7794/AD7795‫ڦ‬एጚ‫ۉ‬უᇸă‫ړ‬჋ ስాևएጚ‫ۉ‬უᇸ้Lj໲ᇑۙ዆ഗాև၎૶(փሞREFINᆅ গฉ༵ࠃ)ă ኄၵֶ‫ݴ‬๼෇‫ࠌڦ‬ఇ‫ྺྷݔ‬GND዁AVDDăएጚ‫ۉ‬უ๼෇ ๟࿮࣐؋๕ǗᅺُLjࡗ‫ڦٷ‬R-Cᇸፆੇࣷᆅ෇ሺᅮဃֶă Rev. D | Page 32 of 36 AD7794/AD7795 Ք‫׬‬एጚ‫ۉ‬უREFIN(REFIN(+) − REFIN(−))ྺ2.5 VLj‫ڍ‬ AD7794/AD7795੗ᅜ֑ᆩ0.1 V዁AVDD‫ڦాྷݔ‬एጚ‫ۉ‬უ߾ ፕăසࡕᆌᆩዐఇె๼෇‫ߌدڦ܋‬ഗ‫ڦ‬घ૤DŽ‫ۉ‬უई‫ۉ‬ ୁDžᄺൻ‫ۯ‬ഗॲ‫ڦ‬एጚ‫ۉ‬უLjሶघ૤ᇸዐ‫گ‬ೕሯำ‫ڦ‬ᆖၚ ॽ‫ڥ‬ᅜၩ‫أ‬Ljᅺྺᆌᆩ๟Բ୲๕‫ڦ‬ăසࡕሞ‫ݥ‬Բ୲๕ᆌᆩ ዐ๑ᆩAD7794/AD7795Ljᆌ๑ᆩ‫گ‬ሯำएጚ‫ۉ‬უᇸă ‫ܔ‬ᇀAD7794/AD7795Ljॺᅱ๑ᆩ‫ڦ‬2.5 Vएጚ‫ۉ‬უᇸԈ ઔADR381ࢅADR391Ljܾኁ਩ྺ‫گ‬ሯำĂ‫ࡼࠀگ‬एጚ‫ۉ‬უ ᇸă࣏ᆌጀᅪLjएጚ‫ۉ‬უ๼෇༵ࠃߛፆੇĂ‫ۯ‬ༀ޶ሜăᆯ ᇀ߳एጚ‫ۉ‬უ๼෇‫ڦ‬๼෇ፆੇ๟‫ۯ‬ༀ‫ڦ‬Ljᅺُኄၵ๼෇ฉ ‫ۉڦ‬ፆᇑ‫ۉ‬ඹፇࢇ੗ీࣷᆅഐ኱ୁሺᅮဃֶLjਏ༹ൽਦᇀ ൻ‫ۯ‬एጚ‫ۉ‬უ๼෇‫ڦ‬႑ࡽᇸ‫ڦ‬๼‫؜‬ፆੇă ए ጚ ‫ ۉ‬უ ᇸ (૩ ස ADR391)ཚ ‫ ׉‬ਏ ᆶ ‫ گ‬๼ ‫ ؜‬ፆ ੇ Lj ᅺ ܸ REFIN(+)ฉ੗ᅜᆶඁ᳘‫ۉ‬ඹLjܸփࣷߴဣཥ‫ټ‬ઠሺᅮဃ ֶăසࡕሞྔև‫ۉ‬ፆฉइൽएጚ๼෇‫ۉ‬უLjሶᅪ࿆ጣएጚ ‫ۉ‬უ๼෇‫܋‬ਏᆶ࢔‫ྔڦٷ‬ևᇸፆੇă‫ܔ‬ᇀُૌ‫ۉ‬ୟದዃLj փླྀ४ሞREFINᆅগฉ৊ႜྔևඁ᳘ă एጚ‫ۉ‬უॠ֪ AD7794/AD7795ࡤᆶೌాएጚ‫ۉ‬უॠ֪‫ۉ‬ୟLj‫ړ‬ᆩࢽ჋ስ ྔևएጚ‫ۉ‬უྺएጚ‫ۉ‬უᇸ้Lj޿‫ۉ‬ୟ੗ᅜॠ֪ഗॲ๟‫ޏ‬ ᆶᆩᇀገ࣑ईၯጚ‫ڦ‬ᆶၳएጚ‫ۉ‬უăॽದዃस٪ഗዐ‫ڦ‬ REF_DET࿋ ย ዃ ྺ 1Lj ੗ ᅜ ๑ ీ ُ ༬ Ⴀ ă ස ࡕ ჋ ۨ ‫ڦ‬ REFIN(+)ᇑREFIN(–)ᆅগኮक़‫ۉڦ‬უই዁0.3 VᅜူLjईኁ REFIN(+)ईREFIN(–)๼෇ਸୟLjሶAD7794/AD7795ಒ܏໲ փምਏᆶᆶၳ‫ڦ‬एጚ‫ۉ‬უăُ้Ljጒༀस٪ഗዐ‫ڦ‬ NOXREF࿋ዃ 1ăසࡕAD7794/AD7795ኟሞኴႜኟ‫׉‬ገ ࣑LjܸNOXREF࿋ՎྺᆶၳLjሶገ࣑঳ࡕՎྺඇ1ăᅺُLj ժ࿮Ղᄲሞኴႜገ้࣑‫׼‬Ⴤ॔๫NOXREF࿋‫ڦ‬ጒༀLjኻႴ ሞٗADCຕ਍स٪ഗ‫܁‬ൽ‫ڦ‬ገ࣑঳ࡕྺඇ1้ᄓኤഄጒ ༀăසࡕAD7794/AD7795ኟሞኴႜ฿ۙई஢ଉ‫ײ‬ၯጚLjܸ NOXREF࿋ՎྺᆶၳLjሶॽ্ኹ၎ᆌၯጚस٪ഗ߸ႎLjᅜ ௨ኄၵस٪ഗሜ෇‫ٱ‬ဃ‫ڦ‬ဣຕLjཞ้ጒༀस٪ഗ‫ڦ‬ERR࿋ ࣷዃ1ăසࡕᆩࢽփᇼᅪ௅ْኴႜၯጚ้‫ۼ‬ᄲᄓኤ๟‫ޏ‬٪ ሞᆶၳ‫ڦ‬एጚ‫ۉ‬უᇸLjሶᆌሞၯጚዜ೺঳ຐ้ॠֱERR࿋ ‫ڦ‬ጒༀă ް࿋ ‫ܔ‬AD7794/AD7795૶Ⴤႀ෇32߲1Lj੗ᅜ๑ഗॲ‫ۉڦ‬ୟࢅ ‫ز‬ႜথ੨ް࿋ăኄॽް࿋இडĂຕጴ୳հഗࢅఇెۙ዆ ഗLjܸٗ໯ᆶೌాस٪ഗް࿋ྺఐණኵăฉ‫้ࣷۉ‬ጲ‫ۯ‬ኴ ႜް࿋ăഔ‫ްۯ‬࿋ኮࢫLjᆩࢽՂႷ‫ځڪ‬500 μs֍ీ‫ݡ‬࿚ೌా स٪ഗăසࡕSCLK၍ୟฉ‫ڦ‬ሯำ‫ڞ‬ዂ‫ز‬ႜথ੨ෟ฿ཞօLj ሶ੗ኴႜް࿋ᅜ࣬ްཞօă AVDD॔੦ഗ ‫أ‬କገ࣑ྔև‫ۉ‬უྔLjᄺ੗ᅜ૧ᆩADC॔੦AVDDᆅগฉ ‫ۉڦ‬უă‫ړ‬CH2዁CH0࿋‫ڪ‬ᇀ1้LjAVDDᆅগฉ‫ۉڦ‬უሞ ాևປ३6ԠLj໯इ‫ۉڦڥ‬უแेᇀΣ-Δۙ዆ഗLj໲֑ᆩ 1.17 Vాևएጚ‫ۉ‬უ৊ႜఇຕገ࣑ăُ༬Ⴀ‫ڦ‬ᆩ‫ت‬ሞᇀ੗ ᅜ॔੦‫ۉ‬ᇸ‫ۉ‬უ‫ڦ‬հ‫ۯ‬ă ၯጚ AD7794/AD7795༵ࠃ຺ዖၯጚఇ๕ǖాևଭ‫ۉ‬ೝၯጚĂా և஢ଉ‫ײ‬ၯጚĂဣཥଭ‫ۉ‬ೝၯጚࢅဣཥ஢ଉ‫ײ‬ၯጚLjཚࡗ ఇ๕स٪ഗዐ‫ڦ‬ఇ๕࿋੗ᅜยዃၯጚఇ๕ăኄၵၯጚ੗ᅜ ॽ฿ۙဃֶࢅ஢ଉ‫ײ‬ဃֶᆶၳ‫ں‬ই዁ᇑሯำ၎‫ړ‬ă௅ْገ ࣑ྜ‫ࢫׯ‬LjADCገ࣑঳ࡕႴ૧ᆩADCၯጚस٪ഗ৊ႜۙ ኝLj඗ࢫႀ෇ຕ਍स٪ഗăገ࣑঳ࡕံ३ඁ฿ۙၯጚဣ ຕLj඗ࢫ‫ױ‬ᅜ஢ଉ‫ײ‬ဣຕă ྺഔ‫ۯ‬ၯጚLjՂႷॽ๢‫ڦړ‬ኵႀ෇ఇ๕स٪ഗዐ‫ڦ‬MD2዁ MD0࿋ăၯጚྜ‫ࢫׯ‬Lj၎ᆌၯጚस٪ഗ‫ాڦ‬ඹࣷԥ߸ႎLj ጒༀस٪ഗዐ‫ڦ‬DRY࿋ዃ1LjDOUT/DRYᆅগՎྺ‫ۉگ‬ೝ )සࡕCSྺ‫ۉگ‬ೝ*Ljժ൐AD7794/AD7795‫࣮ݓ‬੣ှఇ๕ă ాևଭ‫ۉ‬ೝई஢ଉ‫ײ‬ၯጚ೺क़Lj߳ଭ๼෇ࢅ஢ଉ‫ײ‬๼෇ጲ ‫ۯ‬ᇑADC๼෇ᆅগాև၎૶ă඗ܸLjဣཥၯጚሶᄲ൱ሞഔ ‫ۯ‬ၯጚఇ๕ኮമLjॽဣཥଭ‫ۉ‬ೝ‫ۉ‬უࢅဣཥ஢ଉ‫ۉײ‬უแ ेᇀADCăኄᄣ੗ၩ‫أ‬ADC‫ྔڦ‬ևဃֶă ٗ֡ፕฉઠੂLjၯጚ৽ၟଷᅃْADCገ࣑ăසႴᄲLjଭ‫ۉ‬ ೝၯጚᆌ‫ړ‬ጺ๟ሞ஢ଉ‫ײ‬ၯጚኮമኴႜăဣཥ෉ॲᆌ॔๫ ጒༀस٪ഗዐ‫ڦ‬DRY࿋ईDOUT/DRYᆅগLjཚࡗᅃ߲୾კ Ⴞଚईዐ܏ൻ‫ײۯ‬Ⴞඓۨၯጚࢆ้঳ຐă ቘհ๑ీ้Ljాև฿ۙၯጚࢅဣཥ฿ۙၯጚ਩Ⴔᄲଇ߲ገ ࣑ዜ೺ăُ้࿮Ⴔኴႜాև฿ۙၯጚLjᅺྺADCԨวࣷ‫׼‬ Ⴤၩ‫أ‬฿ۙăቘհ্ᆩ้Ljྜ‫ాׯ‬և฿ۙၯጚईဣཥ฿ۙ ၯጚႴᄲᅃ߲ገ࣑ዜ೺ăُ้Ⴔᄲኴႜాև฿ۙၯጚLjܸ ൐ᆌሞ஢ଉ‫ײ‬ၯጚኮമኴႜă ྺኴႜాև஢ଉ‫ײ‬ၯጚLj஢ଉ‫ײ‬๼෇‫ۉ‬უࣷጲ‫ۯ‬ᇑُၯጚ ჋ۨ‫ڦ‬ఇె๼෇‫܋‬၎૶ă‫ړ‬ሺᅮྺ1้Ljྜ‫ׯ‬ၯጚႴᄲଇ ߲ገ࣑ዜ೺)ቘհ๑ీ้*ईᅃ߲ገ࣑ዜ೺)ቘհ্ᆩ้*ă‫ܔ‬ ᇀ߸ߛሺᅮLjኴႜ஢ଉ‫ײ‬ၯጚႴᄲ຺߲ገ࣑ዜ೺)ቘհ๑ీ Rev. D | Page 33 of 36 AD7794/AD7795 ้*ईଇ߲ገ࣑ዜ೺)ቘհ্ᆩ้*ăDOUT/DRY ሞၯጚഔ‫ۯ‬ ้Վྺߛ‫ۉ‬ೝLjሞၯጚྜ‫ۉگް้࣬ׯ‬ೝăၯጚኮࢫLj ADC‫ت‬ᇀ੣ှఇ๕ă֪‫ڦڥ‬஢ଉ‫ײ‬ဣຕዃᇀ჋ۨཚ‫ڦڢ‬஢ ଉ‫ײ‬स٪ഗዐă‫ړ‬ሺᅮྺ128้Lj࿮݆ኴႜాև஢ଉ‫ײ‬ၯ ጚă‫ܔ‬ᇀ޿ሺᅮยዃLj੗ᅜኴႜဣཥ஢ଉ‫ײ‬ၯጚă௅ْ߸ ߀ᅃ߲ཚ‫ڦڢ‬ሺᅮ้Lj‫ۼ‬Ⴔᄲኴႜ஢ଉ‫ײ‬ၯጚLjᅜ๑஢ଉ ‫ײ‬ဃֶፌၭă ాև஢ଉ‫ײ‬ၯጚኻీሞ༬ۨ߸ႎ໏୲้ኴႜă‫ړ‬ሺᅮྺ 1Ă2ࢅ4้Lj੗ᅜሞඪᅪ߸ႎ໏୲้ኴႜాև஢ଉ‫ײ‬ၯ ጚă‫ڍ‬๟Lj‫ܔ‬ᇀ߸ߛሺᅮLjሶኻీሞ߸ႎ໏୲ၭᇀई‫ڪ‬ᇀ 16.7 HzĂ33.3 Hzࢅ50 Hz้ኴႜăփࡗLj஢ଉ‫ײ‬ဃֶփᅺ ߸ႎ໏୲ܸ߀ՎLjᅺُሞగᅃ߸ႎ໏୲้ኴႜ‫ڦ‬ၯጚ‫ܔ‬໯ ᆶ߸ႎ໏୲਩ᆶၳ)्ยሺᅮईएጚ‫ۉ‬უᇸԍ‫׼‬փՎ*ă ྜ‫ׯ‬ဣཥ஢ଉ‫ײ‬ၯጚႴᄲଇ߲ገ࣑ዜ೺)ቘհ๑ీ้*ईᅃ ߲ገ࣑ዜ೺)ቘհ্ᆩ้*Ljᇑሺᅮยዃ࿮࠲ăဣཥ஢ଉ‫ײ‬ ၯጚ੗ᅜሞ໯ᆶሺᅮࢅ໯ᆶ߸ႎ໏୲้ኴႜăቘհ্ᆩ ้Lj฿ۙၯጚ)ాևईဣཥ฿ۙ*ᆌሞဣཥ஢ଉ‫ײ‬ၯጚഔ‫ۯ‬ ኮമኴႜă থ‫ࢅں‬քਆ ᆯᇀADC‫ڦ‬ఇె๼෇ࢅएጚ๼෇਩ྺֶ‫ݴ‬๼෇Ljᅺُఇె ۙ዆ഗዐ‫ܠڦ‬ຕ‫ۉ‬უ਩ྺࠌఇ‫ۉ‬უăഗॲ‫؜ڦ‬෥ࠌఇᅞ዆ Ⴀీ੗ၩ‫أ‬ኄၵ๼෇‫ࠌڦ‬ఇሯำăຕጴ୳հഗ੗ᅞ዆‫ۉ‬ᇸ ฉ‫ټ੻ڦ‬ሯำLj‫ܔ‬ఫၵሞۙ዆ഗ֑ᄣೕ୲‫ڦ‬ኝຕԠೕ୲‫ڦ‬ ሯำ‫ྔأ‬ăຕጴ୳հഗᄺ੗ᅜၩ‫أ‬ઠጲఇెࢅएጚ๼෇‫܋‬ ‫ڦ‬ሯำLjཉॲ๟ኄၵሯำᇸுᆶ๑ఇెۙ዆ഗԏࢅăᅺ ُLjAD7794/AD7795‫ੇڦ‬ሯీ૰Բ‫د‬ཥߛ‫ݴ‬Ր୲ገ࣑ഗ߸ ഽăփࡗLj६ᇀAD7794/AD7795‫ݴڦ‬Ր୲๟සُኮߛLjܸ ഄሯำ‫ۉ‬ೝ๟සُኮ‫گ‬LjᅺُՂႷ৉ั‫ځܔ‬থ‫ࢅں‬քਆă AD7794/AD7795໯ሞ‫ڦ‬ᆇຘ‫ۉ‬ୟӱᆌ֑ᆩఇెև‫ݴ‬ᇑຕጴ և‫ݴݴ‬૗ยऺLjժ၌዆ሞ‫ۉ‬ୟӱ‫ڦ‬ᅃۨ൶ᇘాăྺํ၄ፌ ॅೡԸLjথ‫֫ں‬ᅃӯᆌ৑ଉณ֑ᆩ์ਗ਼रຍă ॺᅱॽAD7794/AD7795‫ڦ‬GNDᆅগ૶‫ڟ‬ဣཥ‫ڦ‬AGND֫ă ࿮ஃ֑ൽࢆዖքਆLjᆩࢽ਩ՂႷጀᅪࡀࣄဣཥዐ‫࣮ڦୁۉ‬ ୁୟ০Ljඓԍ໯ᆶ‫ୁ࣮ڦୁۉ‬ୟ০਩৑੗ీ੍ৎ‫ٳڟୁۉ‬ ణ‫ںڦ‬໯ঢ়ࡗ‫ڦ‬ୟ০ăൎကഽ዆ຕጴ‫ࡗୁୁۉ‬քਆ‫ڦ‬ AGNDև‫ݴ‬ă ॽAD7794/AD7795‫ڦ‬থ‫ݣ֫ں‬ሞഄူ‫ݛ‬੗ᅜ‫ݞ‬ኹሯำ᳘ ࢇăAD7794/AD7795‫ۉڦ‬ᇸ၍ୟᆌ֑ᆩ৑੗ీ੻‫ڦ‬ጽ၍Lj ᅜ༵ࠃ‫گ‬ፆੇୟ০Ljժ३ၭ‫ۉ‬ᇸ၍ୟฉ‫ڦ‬றِሯำၳᆌă ้ዓ‫੺ڪ‬໏ਸ࠲႑ࡽᆌ૧ᆩຕጴ‫ں‬ೡԸഐઠLjᅜ௨ၠ‫ۉ‬ୟ ӱ‫ڦ‬ഄ໲և‫ޖݴ‬พሯำăُྔLjਨփᆌॽ้ዓ႑ࡽጽ၍ք ยሞఇె๼෇޹ৎăՆ௨ຕጴ႑ࡽᇑఇె႑ࡽ঍۠ă‫ۉ‬ୟ ӱ၎‫ݒ‬ଇ֨ฉ‫ڦ‬ጽ၍ᆌԵُ‫ؽ‬኱Ljኄᄣᆶዺᇀ३ၭ‫ۉ‬ୟӱ ‫ڦ‬ઍཚၳᆌăྲ‫ټ‬၍रຍ๟ፌॅ჋ስLj‫ڍ‬ኄዖरຍ‫ܔ‬ᇀມ ௬‫ۉ‬ୟӱ࿄Ղጺ๟੗ႜă֑ᆩኄዖरຍ้Lj‫ۉ‬ୟӱ‫ڦ‬ᇮॲ ֨ጆᆩᇀথ‫֫ں‬Lj႑ࡽጽ၍ሶքยሞࡰথ֨ă ๑ᆩߛ‫ݴ‬Ր୲ADC้Ljଆࡻ‫ڦ‬ඁ᳘ๆ‫ݴ‬ዘᄲăᆌॽ10 μF᮳ ‫ۉ‬ඹᇑ0.1 μF༩ٍ‫ۉ‬ඹժ૴Lj‫ܔ‬AVDDඁ᳘‫ڟ‬GNDăཞ้ᆌॽ 10 μF᮳‫ۉ‬ඹᇑ0.1 μF༩ٍ‫ۉ‬ඹժ૴Lj‫ܔ‬DVDDඁ᳘‫ڟ‬ဣཥ‫ڦ‬ DGND֫ Ǘ ဣ ཥ AGND‫ ڟ‬DGND‫ ૶ ڦ‬থ ᆌ ੍ ৎ AD7794/AD7795ăྺ๑ኄၵඁ᳘ᇮॲํ၄ፌॅၳࡕLjᆌ๑ ഄ৑੗ీ੍ৎഗॲLjፌࡻ๟৆ཌྷഗॲăᆌ๑ᆩ0.1 μF༩ٍ‫ۉ‬ ඹ‫ܔ‬໯ᆶஇडႊೌඁ᳘‫ڟ‬DGNDă Rev. D | Page 34 of 36 AD7794/AD7795 ᆌᆩ႑တ AD7794/AD7795਩ྺ‫ׯگ‬ԨĂߛ‫ݴ‬Ր୲ఇຕገ࣑ഗăఇຕ ገ࣑ࠀీᆯΣ-Δ঳ࠓ༵ࠃLjᅺُഗॲ‫ੇڦ‬ሯీ૰࢔ഽLj‫ݥ‬ ‫׉‬๢ࢇ‫ߌد‬ഗ֪ଉĂ߾ᄽࢅࡗ‫ײ‬੦዆ᆌᆩă ሞएᇀ‫ߌد‬ഗ‫ڦ‬ᆌᆩዐ๑ᆩAD7794/AD7795‫ࡻ߲ܾڼڦ‬ ‫ت‬Lj๟‫ࡼࠀگ‬ᆌᆩ੗ᅜ؊‫ݴ‬૧ᆩ‫ۉ܋گ‬ᇸਸ࠲ă‫ۉ܋گ‬ᇸ ਸ࠲ᇑ‫ڦൃۉ‬ૐ‫૴ز܋‬ăኟ‫߾׉‬ፕ้Lj޿ਸ࠲ԿࢇLjᅜՍ ኴႜ֪ଉăሞᄲ൱‫ڦࡼࠀگ‬ᆌᆩዐLjAD7794/AD7795੗ᅜ ‫ت‬ᇀ‫ځ‬ऐఇ๕Ljܸٗ၂ዸই‫گ‬ᆌᆩ‫ࡼࠀڦ‬ăُྔLjሞ‫ځ‬ऐ ఇ๕ူLj‫ۉ܋گ‬ᇸਸ࠲੗ᅜ܏ਸLjᅜ௨മ‫ߌد܋‬ഗփՂᄲ ‫୲ࠀݯࡼں‬ă‫ړ‬ഗॲ૗ਸ‫ځ‬ऐఇ๕൐‫ۉ܋گ‬ᇸਸ࠲Կࢇ ้Ljᆩࢽᆌඓԍമ‫ۉ܋‬ୟྜඇॺ૬Lj඗ࢫ֍ీ‫׈‬๬‫܁‬ൽ AD7794/AD7795ă ୁଉऺ ཮24၂๖AD7794/AD7795ሞୁଉऺዐ‫ڦ‬ᆌᆩLj޿ୁଉऺᆯ ଇ߲უ૰‫ߌد‬ഗፇ‫ׯ‬Ljୁଉ‫ڪ‬ᇀუ૰ֶă໯๖უ૰‫ߌد‬ഗ ྺSensymࠅິ‫ڦ‬BP01ăუ૰‫ߌد‬ഗ࿋ᇀ‫ྪൃۉ‬ஏዐLjሞഄ OUT+ᇑOUT–ᆅগኮक़༵ࠃֶ‫ݴ‬๼‫ۉ؜‬უă‫ܔ‬ᇀ‫ߌد‬ഗ‫ڦ‬ ‫ۨܮ‬஢ଉ‫ײ‬უ૰)Ԩ૩ዐྺ300 mmHg*Ljֶ‫ݴ‬๼‫ۉ؜‬უྺ๼ ෇‫ۉ‬უ)नIN(+)‫܋‬ᇑIN(–)‫܋‬ኮक़‫ۉڦ‬უ*‫ڦ‬3 mV/Vă ཮ዐLj࿒‫܈‬ց‫׋‬๟ཚࡗඤ௺‫ۉ‬ፆઠኴႜăೌాघ૤‫ྺୁۉ‬ ޿ඤ௺‫ۉ‬ፆ༵ࠃघ૤ăُྔLj࿒‫֪܈‬ଉ‫ڦ‬एጚ‫ۉ‬უ๟ٗᅃ ߲ᇑ޿ඤ௺‫ۉ‬ፆ‫ڦ૴ز‬৛௢‫ۉ‬ፆइ‫ڥ‬ăᆯُ੗ํ၄Բ୲๕ ֪ଉLjघ૤‫ڦୁۉ‬հ‫֪ܔۯ‬ଉுᆶᆖၚ)֪ଉ঳ࡕ๟৛௢֖ ੊‫ۉ‬ፆᇑඤ௺‫ۉ‬ፆ‫ڦ‬Բኵ*ă ्ยघ૤‫ۉ‬უྺ5 VLjሶ‫ߌد‬ഗ‫ڦ‬஢ଉ‫ײ‬๼‫ۉ؜‬უྺ15 mVă ‫ڦൃۉ‬घ૤‫ۉ‬უ੗ᅜ኱থᆩઠ༵ࠃADC‫ڦ‬एጚ‫ۉ‬უLjᅺྺ एጚ‫ۉ‬უ๼෇‫ྷݔ‬Ԉઔ‫ۉ‬ᇸ‫ۉ‬უă VDD REFIN1(+) GND IN+ OUT– AD7794/AD7795 AIN1(+) AIN1(–) IN+ OUT– OUT+ AVDD VDD IN– OUT+ AIN2(+) AIN2(–) IN– AIN3(+) MUX BUF IN-AMP Σ-Δ ADC SERIAL INTERFACE AND LOGIC CONTROL DOUT/RDY DIN SCLK CS AIN3(–) GND REFIN2(+) VDD REFIN2(–) IOUT1 INTERNAL CLOCK DVDD REFIN1(–) PSW 04854-025 RCM GND CLK ཮24. ‫ۆ‬႙ᆌᆩ(ୁଉऺ) Rev. D | Page 35 of 36 AD7794/AD7795 ྔႚ؅٫ 7.90 7.80 7.70 24 13 4.50 4.40 4.30 1 6.40 BSC 12 PIN 1 0.65 BSC 0.15 0.05 0.30 0.19 1.20 MAX SEATING PLANE 0.20 0.09 8° 0° 0.75 0.60 0.45 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-153-AD ཮25. 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] (RU-24) ؅٫(‫ڇ‬࿋ǖࡹ௝) ۩ࠔኸళ ႙ࡽ AD7794BRU AD7794BRU-REEL AD7794BRUZ 1 AD7794BRUZ-REEL1 AD7794CRUZ1 AD7794CRUZ-REEL1 AD7795BRUZ1 AD7795BRUZ-REEL1 EVAL-AD7794EB EVAL-AD7795EB 1 ࿒‫!ྷݔ܈‬ –40°C ዁ +105°C –40°C ዁ +105°C –40°C ዁ +105°C –40°C ዁ +105°C –40°C ዁ +125°C –40°C ዁ +125°C –40°C ዁ +105°C –40°C ዁ +105°C ‫ހ‬ጎ௮ຎ 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] 24ᆅগ‫ג‬ԋ৆໫ၭ႙‫ހ‬ጎ[TSSOP] ೠࠚӱ ೠࠚӱ Z = ‫ࢇޙ‬RoHSՔጚ‫ڦ‬ग़ඹഗॲă ©2004-2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04854-0-3/07(D) Rev. D | Page 36 of 36 ‫ހ‬ጎ჋ၜ RU-24 RU-24 RU-24 RU-24 RU-24 RU-24 RU-24 RU-24