Ngosipụta LINEAR TECHNOLOGY LTC2607 Circuit16-BIT Dual Rail-To-Rail DAC nwere ntuziaka onye ọrụ interface I2C
Nkọwa
Ihe ngosi sekit 934 nwere LTC2607 dual 16-bit DAC. Ngwaọrụ a na-ewepụta akara ngosi bọọdụ ọhụrụ maka 16-bit DACs yana ọ na-akwalite ụkpụrụ arụmọrụ maka draịva mmepụta, ụkpụrụ ibu, na crosstalk n'otu ọkọnọ, vol.tagDACs e-mpụta. DC934 nwere ọtụtụ atụmatụ maka ịtụle arụmọrụ nke LTC2607. Onboard 5 volt, 4.096 volt, na 2.5 volt ntụnyere aka nke ziri ezi ka enyere, na LTC2607 nwere ike ịkwado site na 5 volt ntụaka maka ịtụle ọrụ ụgbọ okporo ígwè. Akụkụ ọzọ nke bọọdụ a bụ onboard LTC2422 0-bit ADC maka nlekota DAC mmepụta voltage. Njehie mkpokọta 16ppm nke ngwaọrụ a zuru oke maka iwere nha bara uru nke paramita LTC2607 dị iche iche.
Nhazi files maka bọọdụ sekit a dị. Kpọọ ụlọ ọrụ LTC. LTC bụ ụghalaahịa nke Linear Technology Corporation.
Ọgụgụ 1. Nhazi Ngwa Ngwa Kwesịrị Ekwesị
| PARAMETER | Ọnọdụ | URU |
| Mkpebi | 16 BITS | |
| Monotonicity | Vcc = 5V, Vref = 4.096V | 16 BITS |
| Ọdịiche adịchaghị adị | Vcc = 5V, Vref = 4.096V | +/- 1 LSB |
| Integral anọghị n'ịntanetị | Vcc = 5V, Vref = 4.096V | +/- 19 LSB Ụdị |
| Iwu Ibu Ibu | Vcc = Vref = 5V, Midscale
Iout = +/- 15 mA |
2 LSB/mA Max |
| DC Crosstalk | N'ihi ibunye mgbanwe ugbu a na ọwa ọ bụla ọzọ | 3µV/mA |
Ngwa ịmalite usoro
Jikọọ DC934 na onye na-ahụ maka serial USB DC590 site na iji eriri rịbọn 14-conductor wetara. Jikọọ DC590 na PC nnabata na eriri USB A/B ọkọlọtọ. Gbaa ngwa nleba anya ewepụtara
DC590 ma ọ bụ budata ya na www.linear.com. A ga-ebunye ogwe njikwa ziri ezi na-akpaghị aka.
Pịa bọtịnụ CHỌTA ka ịmalite mpụta koodu na DAC wee gụọ azụ mpụta nsonaazụ voltage.
Akwụkwọ sọftụwia zuru ezu dị site na ihe nchịkọta nhọrọ enyemaka, ebe enwere ike ịgbakwunye atụmatụ kwa oge.
Nhazi ngwaike
Ndị na-awụlikwa elu
JP1 – Vref Họrọ. Họrọ 5 volt, 4.096 volt, ma ọ bụ 2.5 volt ntụaka. Iji tinye ntụaka mpụga site na Vref Turret, wepụ jumper a.
JP2 - Vcc họrọ. A na-ewere Vcc site na nrụbama 5 volt nke nọ n'ụgbọ ma ọ bụ 5 volt na-ahazi ọkọnọ site na bọọdụ njikwa. Ịhọrọ ntụaka volt 5 maka VCC na Vref na-enye ohere njirimara nke ụgbọ okporo ígwè na-arụ ọrụ ụgbọ okporo ígwè nke LTC2607.
JP3 - ADC gbanyụọ. Tọọ ON maka ịrụ ọrụ ya na njikwa serial DC590. Mgbe ị na-eji ngwa ngwụcha nke ndị ahịa, ADC nwere ike gbanyụọ kpamkpam site na ịtọ jumper ka ọ bụrụ gbanyụọ.
Maka nha ụda mkpọtụ dị oke mkpa mgbe ị na-eji sọftụwia ewepụtara LTC, tọọ mmepụta voltage wee kwụsị ịgụ voltage site na-anakọta bọtịnụ na akara panel.
JP5-njikọ REFLO - ma ọ bụ n'ala ma ọ bụ na-ebunye ya. Rụtụ aka na mpempe akwụkwọ data LTC2607 maka nkọwa REFLO.
JP4,6,7 – nhọrọ adreesị I2C. Ejikọrọ ndị a na ntụtụ CA0, CA1, CA2. Ngwa ngosi ngosi na-eji adreesị I2C zuru ụwa ọnụ, yabụ ntụtụ ndị a enweghị mmetụta mgbe ejiri ya na ngwa ngwa QuickEval. Enwere ike iji ha na prototyping iji tọọ ndị
Adreesị I2C nke LTC2607 - rụtụ aka na mpempe akwụkwọ data maka nhazi ọkwa CA0,1,2 gaa na adreesị I2C.
Njikọ Analogs
VOUTA, VOUTB - Mpụta LTC2607
Vref - A na-ejikọta turret Vref ozugbo na njedebe ntụaka nke LTC2607 na LTC2422 ADC. Mgbe a na-eji otu n'ime nrụtụ aka ndị nọ n'ụgbọ ahụ, ntụaka voltage nwere ike nyochaa n'oge a. Enwere ike itinye ntụaka mpụga na turret a ka ewepụchara JP1.
NKE ALA NA IKE
Ike (Vcc) - Ọ na-abụkarị DC934 bụ onye njikwa DC590 na-akwado ya. Enwere ike ịnye Vcc na turret a, agbanyeghị na ọkụ na DC590 ga-enwe nkwarụ! Rụtụ aka na ntuziaka mmalite ngwa ngwa DC590 maka nkọwa ndị ọzọ gbasara ụdị ọrụ a. Grounding - A na-enye ike dị iche iche na mgbaama mgbaama. Ekwesịrị iweghachite mmiri ọ bụla buru ibu nke ewepụtara na nsonaazụ DAC na ala ike. Ọzọkwa, ọ bụrụ na ejikọrọ ọkụ eletrik dị n'èzí, a ga-eji ala ike mee ihe. A na-ejikọta ala mgbaama na ụgbọ elu ala ekpughere n'elu na n'akụkụ ala nke bọọdụ ahụ, yana na turret abụọ ahụ akpọrọ "Gnd." Jiri ala mgbaama dị ka ebe ntụnye aka maka nha na njikọ na sekit mpụga.
NTỤTỊ
Nnwale ndị a bu n'obi iji gosipụta ụfọdụ n'ime njirimara pụtara ìhè nke LTC2607. Enwere ike ịme ihe niile site na iji onboard LTC2422 iji nyochaa mmepụta DAC voltage. Nsonaazụ egosipụtara voltage ga-ekwenyekarị na voltmeter HP3458A ruo nkeji ise. Ọ bụrụ na DAC ga na-emikpu ma ọ bụ na-enweta nnukwu ihe dị ugbu a, mgbe ahụ nsonaazụ voltage kwesịrị ịtụ ya ka ọ dị nso na DAC dịka o kwere mee.
Ọtụtụ n'ime nkọwapụta mpempe data na-eji ntụnye aka 4.096 volt, yabụ nke a bụ ntụaka akakachasị mma iji maka nnwale ndị a. Iji 5 volt regulator dị ka isi iyi maka Vcc nwere mmachi na Vcc nwere ike ịdị ntakịrị ala karịa Vref, nke nwere ike imetụta njehie nha zuru oke. Ịhọrọ ntụaka volt 5 ka isi mmalite maka Vcc meriri nke a, agbanyeghị, ngụkọta ego nke LTC2601 nwere ike nweta ga-ejedebe na ihe dịka 5mA.
IHE: A na-akwado iji ọkụ ọkụ dị n'èzí maka nnwale ndị a, ọkachasị ndị na-adọta ugbu a dị mkpa. Rụtụ aka na ntuziaka mmalite ngwa ngwa DC590 maka nkọwa.
Mkpebi
The onboard LTC2422 ADC nwere ntinye mkpebi nke 6mV. Nke a ga-edozi ngbanwe 1 LSB (76mV maka Vref=5V, 62.5mV maka Vref=4.096V) na mmepụta LTC2607. Tọọ mmepụta DAC ka ọ bụrụ voltage nso Midscale. Jiri òké họrọ ihe mmịfe FINE dị na njikwa njikwa wee jiri igodo aka nri na aka ekpe were otu LSBs were were otu LSB were zọpụta nsonaazụ ya. Mgbanwe ahụ kwesịrị ịhụ nke ọma na eserese mmepụta. (Ọ nwere ike dị mkpa ichere ka eserese ahụ kpochapụ ma ọ bụrụ na nnukwu nzọụkwụ ka mere.)
ENTERGAL anọghị n'ịntanetị
Enwere ike iji ADC nọ n'ụgbọ mmiri were tụọ INL siri ike. Tụọ otu n'ime mpụta LTC2607 na koodu 256 na 65,535 wee gbakọọ mkpọda ya na nbanye site na iji mpempe akwụkwọ. Na-esote, were ọtụtụ agụ na ebe etiti. Ọgụgụ ekwesịghị ịpụ n'ahịrị gbakọọ karịa 64 LSB, ha ga-anọkarịkwa n'ime 12 LSBs.
Iwu ibu / DC Mpụta Mpụta
Họrọ "5V REG" maka isi iyi Vcc. Tọọ otu ọpụpụ na Midscale (koodu 32768). Isi mmalite ma ọ bụ sink 15 mA site na otu n'ime nsonaazụ DAC site na ịdọrọ ya na ala ike ma ọ bụ Vcc nwere ihe mgbochi bara uru kwesịrị ekwesị. Voltage mgbanwe kwesịrị ịbụ ihe na-erughị 2.25mV, kwekọrọ na mmepụta impedance nke 0.15L. Mmebi nke mmepụta na-adịkarị obere karịa 0.030L. ( tulee DAC voltage na ntụtụ mmepụta ma ọ bụrụ na ị na-eji voltmeter.)
ERROR ỌKỤKWU ZERO
Tọọ otu DAC ka ọ bụrụ koodu 0. Ihe a tụrụ atụ kwesịrị ịbụ ihe na-erughị 9mV ma ga-abụkarị ihe na-erughị 1mV.
EMERIRI OFFSET
Tọọ otu DAC ka ọ bụrụ koodu 256. Ihe mmepụta voltage kwesịrị ịdị n'ime 9mV nke uru ziri ezi, ma ọ bụ Vref x 256/65535.
Imeri mperi
Tọọ otu DAC ka ọ bụrụ koodu 65,535. Mpụta voltaji kwesịrị ịdị n'ime 0.7% nke Vref, ọ ga-adịkwa n'ime 0.2%.
DC CROSSTALK
Tọọ otu DAC na Midscale. Jikọọ 250 ohm resistor site na mmepụta na Vcc ma ọ bụ Ike Ground (iji sink ma ọ bụ isi iyi 10mA, n'otu n'otu, mgbe a na-eji ntụaka 5V.) Ihe mmepụta nke ọzọ ekwesịghị ịgbanwe karịa 3.5mV kwa milli.amp nke ibu ugbua.
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Ngosipụta LINEAR TECHNOLOGY LTC2607 Circuit16-BIT Dual Rail-To-Rail DAC nwere Interface I2C [pdf] Ntuziaka onye ọrụ LTC2607, Ihe ngosi Circuit 16-BIT Dual Rail-To-Rail DAC nwere I2C Interface, LTC2607 Circuit Demonstration 16-BIT Dual Rail-To-Rail DAC with I2C Interface, Circuit 16-BIT Dual Rail-To-Rail DAC with I2C Interface, 16-BIT Dual Rail-To-Rail DAC nwere Interface I2C, Rail-To-Rail DAC nwere Interface I2C, DAC nwere Interface I2C |
