LINEAR TECHNOLOGY LTC2607 Demonstration Circuit16-BIT Dual Rail-To-Rail DAC ine I2C Interface User Guide
DESCRIPTION
Demosheni yedunhu 934 inoratidzira iyo LTC2607 mbiri mbiri 16-bit DAC. Chishandiso ichi chinomisikidza bhenji nyowani yebhodhi density ye16-bit DACs uye inosimudzira maitiro ekuita kweinobuda dhiraivha, kudzora mitoro, uye crosstalk mune imwechete kupa, vol.tage-output maDACs. DC934 ine akawanda maficha ekuongorora mashandiro eLTC2607. Onboard 5 volt, 4.096 volt, uye 2.5 volt precision mareferensi anopiwa, uye LTC2607 inogona kufambiswa ne5 volt referensi yekuongorora njanji-ku-njanji kushanda. Chimwe chinhu chebhodhi iri ndeye paboard LTC2422 0-bit ADC yekutarisa DAC inobuda vol.tage. Iyo 16ppm yakazara kukanganisa kwemudziyo uyu yakakwana pakutora zviyero zvine musoro zveakasiyana LTC2607 paramita.
Design files yebhodhi redunhu iri iripo. Fonera iyo LTC fekitori. LTC chiratidzo chekutengeserana che Linear Technology Corporation.
Mufananidzo 1. Yakakodzera Measurement Equipment Setup
| PARAMETER | CONDITION | VALUE |
| Resolution | 16 zvishoma | |
| Monotonicity | Vcc = 5V, Vref = 4.096V | 16 zvishoma |
| Kusiyanisa Nonlinearity | Vcc = 5V, Vref = 4.096V | +/-1 LSB |
| Yakabatana Isingaite | Vcc = 5V, Vref = 4.096V | +/-19 LSB Typical |
| Load Regulation | Vcc = Vref = 5V, Midscale
Iout = +/- 15 mA |
2 LSB/mA Max |
| DC Crosstalk | Nekuda kwekurodha shanduko yazvino pane chero imwe chiteshi | 3 µV/mA |
ZVINOKOSHA KUTANGA MAITIRO
Batanidza DC934 kune DC590 USB serial controller uchishandisa yakapihwa 14-conductor ribhoni tambo. Batanidza DC590 kuPC inotambira ine tambo ye USB A/B. Mhanya iyo evaluation software yakapihwa
DC590 kana kuidhawunirodha kubva www.linear.com. Iyo chaiyo control panel ichatakurwa otomatiki.
Dzvanya bhatani reKUCHENGA kuti utange kuburitsa macode kuDAC uye kuverenga uchidzosera zvabuda voltage.
Mapepa esoftware akazara anowanikwa kubva kune Rubatsiro menyu chinhu, sezvo maficha anogona kuwedzerwa nguva nenguva.
HARDWARE SET-UP
JUMPERS
JP1 - Vref Sarudza. Sarudza 5 volt, 4.096 volt, kana 2.5 volt referensi. Kuti uise referensi yekunze kuburikidza neVref Turret, bvisa jumper iyi.
JP2 - Vcc sarudza. Vcc inotorwa kubva pane-bhodhi 5 volt referensi kana 5 volt yakadzorwa inopihwa kubva kubhodhi controller. Kusarudza iyo 5 volt refer-ence yeVCC neVref inobvumira hunhu hwenjanji kuenda kune njanji kushanda kweLTC2607.
JP3 - ADC Disable. Gadzirira ON kuti ushande neDC590 serial controller. Paunenge uchishandisa mutengi yekupedzisira application, iyo ADC inogona kuremara zvachose nekuisa jumper kuti DISABLE.
Kune zviyero zveruzha zvakanyanya kana uchishandisa LTC inopihwa software, isa inobuda voltage uye rega kuverenga voltage kuburikidza nebhatani rekuunganidza pane control panel.
JP5 - REFLO yekubatanidza - ingave yakavakirwa kana yakapihwa nekunze. Tarisa kune iyo LTC2607 dhatabheti yeREFLO ruzivo.
JP4,6,7 - I2C kusarudzwa kwekero. Aya akabatanidzwa kune CA0, CA1, CA2 pini. Iyo demo soft-ware inoshandisa kero yepasi rose I2C, saka mapini aya haana mhedzisiro kana akashandiswa neiyo QuickEval soft-ware. Ivo vanogona kushandiswa mu prototyping kuseta iyo
I2C kero yeLTC2607 - tarisa kune dhatabheti yemepu yeCA0,1,2 mazinga kune I2C kero.
ANALOGU CONNECTIONS
VOUTA, VOUTB – LTC2607 Zvibuda
Vref - Iyo Vref turret yakabatana zvakananga kune mareferenzi eiyo LTC2607 uye LTC2422 ADC. Kana imwe yemareferensi ari pabhodhi iri kushandiswa, referensi voltaginogona kutariswa panguva ino. Chirevo chekunze chinogona zvakare kushandiswa kune iyi turret mushure mekubvisa JP1.
GROUNDING UYE SIMBA CONNECTIONS
Simba (Vcc) - Kazhinji DC934 inofambiswa neiyo DC590 controller. Vcc inogona kupihwa kune turret iyi, zvisinei kuti magetsi ari paDC590 anofanira kuvharwa! Tarisa kuDC590 Kurumidza Kutanga Gwaro kuti uwane rumwe ruzivo nezve iyi modhi yekushandisa. Grounding - Simba rakapatsanurwa uye zviratidzo zvechiratidzo zvinopihwa. Chero mafungu makuru akatorwa kubva muDAC zvinobuda anofanira kudzoserwa pasi pemagetsi. Uyezve, kana magetsi ekunze akabatanidzwa, pasi pesimba rinofanira kushandiswa. Ivhu rechiratidzo rakabatana nendege dzepasi dzakavhurika kumusoro nekuzasi kwebhodhi, uye kune mbiri turets dzakanzi "Gnd." Shandisa chiratidzo chepasi senzvimbo yereferensi yezviyero nekubatanidza kune ekunze maseketi.
ZVIITIKO
Izvi zvinotevera zviedzo zvakaitirwa kuratidza zvimwe zvakatanhamara zveLTC2607. Zvese zvinogona kuitwa uchishandisa iyo onboard LTC2422 kutarisa iyo DAC inobuda voltage. The-inotaridzwa goho voltage anozo bvumirana ne HP3458A voltmeter kusvika manhamba mashanu. Kana iyo DAC ichange ichinyura kana kutsvaga yakakosha ikozvino, ipapo inobuda voltage inofanira kuyerwa sepedyo neDAC sezvinobvira.
Mazhinji ezvinyorwa zvemapepa edata anoshandisa 4.096 volt referensi, saka iyi ndiyo inosarudzirwa yereferensi yekushandisa kune izvi zviedzo. Kushandisa 5 volt regulator senzvimbo yeVcc ine muganhu wekuti Vcc inogona kudzika zvishoma pane Vref, izvo zvinogona kukanganisa kukanganisa kwakazara. Kusarudza iyo 5 volt referensi sesosi yeVcc inokunda izvi, zvisinei iyo yakazara ikozvino iyo LTC2601 inogona kuunza inogumira kune ingangoita 5mA.
CHERECHEDZA: Kushandisa magetsi ekunze kunokurudzirwa zvakanyanya kune izvi zviedzo, kunyanya izvo zvinodhirowa zvakakosha ikozvino. Tarisa kune iyo DC590 yekukurumidza kutanga gwara kune ruzivo.
CHISARUDZO
Iyo paboard LTC2422 ADC ine yekuisa resolution ye6mV. Izvi zvinogadzirisa zviri nyore 1 LSB (76mV yeVref=5V, 62.5mV yeVref=4.096V) shanduko mukubuda kweLTC2607. Isa iyo DAC inobuda kune voltage pedyo neMidscale. Sarudza FINE siraidhi pa- control panel negonzo uye shandisa makiyi ekurudyi nekuruboshwe kutsika zvinobuda nemaLSBs ega. Shanduko yacho inofanira kuoneka zvakajeka mugirafu rinobuda. (Zvingave zvakafanira kumirira girafu kuti rijeke kana danho rakakura richangobva kuitika.)
KUSUNGAMIRIRA KUSANGANA
Chiyero chakakasharara cheINL chinogona kutorwa uchishandisa iyo onboard ADC. Eresa chimwe chezvibodzwa zveLTC2607 pakodeti 256 uye 65,535 uye verenga mutsetse uye bvisa uchishandisa spreadsheet. Zvadaro, tora kuverenga kwakati pane dzimwe nzvimbo dzepakati. Maverengero acho haafanire kutsauka kubva pamutsara wakaverengerwa neinopfuura 64 LSBs, uye iwo anowanzo kuve mukati megumi nemaviri LSBs.
ROAD REGULATION / DC OUTPUT IMPEDANCE
Sarudza "5V REG" yeVcc sosi. Isa imwe yezvinobuda kuMidscale (code 32768). Kunobva kana kunyura 15 mA kubva kune imwe yeDAC inobuda nekuikwevera kune simba pasi kana Vcc ine yakakodzera kukosha resistor. The voltage shanduko inofanirwa kuve isingasviki 2.25mV, inoenderana neinobuda impedance ye0.15L. Output impedance kazhinji isingasviki 0.030L. (yera DAC voltage papini yekubuda kana uchishandisa voltmeter.)
ZERO SCALE ERROR
Isa imwe yeDAC pakodhi 0. Kubuda kwakayerwa kunofanirwa kunge kuri pasi pe9mV uye kazhinji kunenge kuri pasi pe1mV.
OFFSET ERROR
Isa imwe yeDACs pacode 256. The output voltage inofanira kuva mukati me9mV yehukoshi chaihwo, kana Vref x 256/65535.
WANA ERROR
Isa imwe yeDACs kukodhi 65,535. Iko kubuda kwemagetsi kunofanirwa kunge kuri mukati me 0.7% yeVref, uye kazhinji inenge iri mukati me 0.2%.
DC CROSSTALK
Isa imwe yeDACs kuMidscale. Batanidza 250 ohm resistor kubva painobuda kuenda kuVcc kana Power Ground (kunyura kana tsime 10mA, zvichiteerana, kana 5V referensi iri kushandiswa.) Imwe inobuda haifanirwe kuchinja nekupfuura 3.5mV pamilliamp yekutakura ikozvino.
Verenga Zvakawanda NezveBhuku rino & Dhawunirodha PDF:
Zvinyorwa / Zvishandiso
 |
LINEAR TECHNOLOGY LTC2607 Demonstration Circuit16-BIT Dual Rail-To-Rail DAC ine I2C Interface [pdf] Bhuku reMushandisi LTC2607, Demonstration Circuit 16-BIT Dual Rail-To-Rail DAC ine I2C Interface, LTC2607 Demonstration Circuit 16-BIT Dual Rail-To-Rail DAC ine I2C Interface, Circuit 16-BIT Dual Rail-To-Rail I2C Interface DAC 16-BIT Dual Rail-To-Rail DAC ine I2C Interface, Rail-To-Rail DAC ine I2C Interface, DAC ine I2C Interface |
