AN-823: 时钟应用中的直接数字频率合成器[中文版] (Rev. 0)

AN-823
ᆌᆩԴऻ
One Technology WaZtP.O. Box 9106t/Prwood, MA 02062-9106, U.S.A.t Tel: 781.329.4700tFax: 781.461.3113t www.analog.com
้ዓᆌᆩዐ‫ڦ‬኱থຕጴೕ୲ࢇ‫ׯ‬ഗ
एᇀ኱থຕጴೕ୲ࢇ‫ׯ‬ഗ‫้ڦ‬ዓဣཥ‫้ڦ‬क़۶‫ۯ‬
ፕኁǖDavid Brandon
ԨᆌᆩԴऻ঻ถକ๑ᆩएᇀ኱থຕጴೕ୲ࢇ‫ׯ‬ഗ(DDS)‫ڦ‬
้ዓဣཥ੗ᅜइ‫้ڦڥ‬क़۶‫ۯ‬ႠీLjժຫ௽କೕ୲ࡀࣄĂ
๼‫ࢅ୲ࠀ؜‬ዘࠓ୳հ‫ܔ‬ᇀ߀฀ဣཥ۶‫ۯ‬Ⴀీਏᆶ‫ڦ‬ዘᄲፕ
ᆩă
ᅎྺ0.022‫܈‬ă‫ܔ‬ᇀ้ዓ‫ۉ‬ୟLj၎࿋ۙၿ‫ݴ‬Ր୲၎‫ړ‬ᇀჽ‫׿‬
ۙኝ‫ݴ‬Ր୲ăُྔLjएᇀDDS‫้ڦ‬ዓဣཥ࣏੗ᅜ༵ࠃ‫؜‬෥
‫֘ڦ‬ା၎࿋ሯำႠీă
๑ᆩDDSׂิ‫گ‬۶‫้ۯ‬ዓ႑ࡽ‫ڦ‬ዷᄲ཈቟Ljሞᇀই‫گ‬DDS
๼‫؜‬႑ࡽዐ٪ሞ‫ڦ‬૗ොሗො‫ݴׯ‬໯ᆅഐ‫ڦ‬ඓۨႠ้क़۶
‫ۯ‬ă
๑ᆩDDSׂิ้ዓ႑ࡽ‫ڦ‬ፌዷᄲᆫ๞ሞᇀഄट৛௢‫ڦ‬ೕ୲
ۙၿ‫ݴ‬Ր୲ăADIࠅິՔጚDDSׂ೗੗ᅜइ‫ۙڦڥ‬ၿ‫ݴ‬Ր
୲ྺ28࿋Ă32࿋ई48࿋ă‫ܔ‬ᇀ400 MHzဣཥ้ዓLj48࿋ۙ
ၿጴ੗ᅜ๑ۙၿ‫ݴ‬Ր୲‫ࢍྲڟٳ‬ጦăଷྔLjDDS‫ڦ‬ೕ୲੗
ᅜٗDCۙၿ዁ഄాևဣཥ้ዓ໏୲‫ڦ‬ᅃӷ)ፌ‫ٷ‬ኵ*ăփ
ࡗLjሞํा֡ፕዐLjೕ୲ฉ၌ཚ‫׉‬ሀྺፌ‫ٷ‬ኵ‫ڦ‬45%Ljᅜ
๢ᆌྔև୳հᄲ൱ă၎࿋ۙၿ‫ݴ‬Ր୲ཚ‫ྺ׉‬25࿋Lj၎࿋ೋ
FCLOCK (fc)
ྺၘဦ‫׃‬ຎኄᅃ‫ۅ‬LjႴᄲକ঴DDSׂิ‫ݛ‬հ้ዓ႑ࡽ‫ࡗڦ‬
‫ײ‬ă཮1ቛ๖޿ࡗ‫ײ‬ዐ௅ᅃ‫ڦۅ‬૙ၙ้ᇘࢅೕᇘ՗၄ႚ
๕Ljᅜतํा‫ڦ‬ೕᇘ՗၄ႚ๕)ፌူ‫*ݛ‬ă
FILTER OUT
DAC OUT
LIMITER
RECONSTRUCTION
FILTER
DDS
CLOCK OUT
0
IDEAL TIME DOMAIN
RESPONSE
t
t
t
IDEAL FREQUENCY
DOMAIN RESPONSE
f
fc
f
2fc
1
f
1
3
5
7
"REAL WORLD"
FREQUENCY RESPONSE
f
fc
2fc
f
f
1
཮ 1. DDSׂิ้ዓ႑ࡽ‫ײࡗڦ‬
Rev. 0 | Page 1 of 8
3
5
7
05758-001
ODD HARMONIC SERIES
AN-823
ස཮໯๖LjDDS‫ڦ‬૙ၙ้ᇘ๼‫֑ྺ؜‬ᄣኟ၀հă֑ᄣኟ၀
հ‫ڦ‬૙ၙೕᇘ՗၄ႚ๕ᆯएհ႑ࡽतഄ৥ၟፇ‫ׯ‬ăྺॽ֑
ᄣኟ၀հገ࣑ྺ้ዓ႑ࡽLjՂႷ‫ݴ‬ଇօ‫ت‬૙ă‫ڼ‬ᅃօ๟‫ܔ‬
႑ࡽ৊ႜ୳հLjཚ‫׉‬๟‫گ‬ཚ୳հLjᅜၩ‫֑أ‬ᄣࡗ‫ײ‬ዐׂิ
‫ڦ‬৥ၟă໚඗ኄ߲ࡗ‫ײ‬փ๟ྜඇ૙ၙLj‫ڍ‬ዘࠓ୳հഗᅃӯ
ॽ޿႑ࡽገ࣑ྺ‫ك‬ኟ၀հLjස཮໯๖ă޿‫گ‬ཚ୳հഗ‫ڦ‬ገ
ችೕ୲ཚ‫׉‬ยዃྺဣཥ้ዓ‫ڦ‬40%዁45%ፑᆸLjᅜՍ૧ᆩ
ඇևۙၿ‫੻ټ‬Ljཞ้ᄺీ؊‫ݴ‬ປ३৥ၟă‫ܾڼ‬օ๟঺ዺ၌
‫ޗ‬ഗLjॽঢ়ࡗ୳հ‫ڦ‬ኟ၀հገ࣑ྺ‫ݛ‬հă၌‫ޗ‬ഗ‫ڦ‬๼෇‫܋‬
ૌຼᇀᅃ߲ԲডഗLj໲ሞ๼෇հႚੵࡗពኵ‫ۉ‬უ‫ڦ‬৛ඓ้
ਗ਼Ljॽഄ๼‫؜‬ൎ࣑ྺ໯Ⴔ‫ڦ‬இडߛईஇड‫گ‬ጒༀăྺ३ၭ
ሯำ᳘ࢇLjDAC๼‫܋؜‬ᇑ၌‫ޗ‬ഗ๼෇‫܋‬ኮक़ፌࡻᆶᅃ߲ມ
၍๕ೝ࢚૶থă
ස཮1໯๖Lj࿄୳հ‫ڦ‬DDS๼‫ํڦ؜‬ाೕ೷޷ࡤሗො‫ׯ‬
‫ݴ‬LjࡤᆶDAC၎࠲ၿհ฿ኈᅜतएհೕ୲‫ڦ‬৥ၟăएհೕ
୲‫ڦ‬ၿհᇸᇀDAC‫ࡧڿد‬ຕ‫ݥڦ‬၍Ⴀă
एհೕ୲‫ڦ‬৥ၟ࿋ᇀዘࠓ୳հഗ‫ڦ‬পኹೕ୲ኮฉă඗ܸLj
एհೕ୲‫ڦ‬ၿհᄺࣷሞ৥ၟዐም၄ăકቛ‫ڼڟ‬ᅃలઊຯ༬
ೕ୲൶)DC዁½ fc*ዐ‫ڦ‬৥ၟ၂๖ྺၿհ‫۠ंڦ‬ႚ๕ăᅺُLj
ኄၵ৥ၟ੗ీ‫؜‬၄ሞ୳հഗཚ‫ټ‬ᅜాăDACၿհ‫ڦ‬ኄၵ‫ټ‬
ా৥ၟLjᅜत୳հഗ࿄؊‫ݴ‬ປ३‫ྔټڦ‬৥ၟLjࠓ‫ׯ‬၌‫ޗ‬ഗ
๼‫؜‬
‫܋‬ฉ‫ڦ‬۶‫ڦۯ‬ዘᄲઠᇸăሞ๼෇հႚੵࡗ၌‫ޗ‬ഗពኵ‫ۉ‬უ
‫้ڦ‬क़क़߰ాLjሗො‫ࣷݴׯ‬ᆅഐደዜ೺‫ۙڦ‬዆Ljܸٗሞ၌
‫ޗ‬ഗ๼‫ิׂ܋؜‬۶‫ۯ‬ăኄᅃࡗ‫ײ‬໯ׂิ‫ڦ‬۶‫ۯ‬ຌᇀඓۨႠ
۶‫ۯ‬Lj໲ᇑ႑ࡽ‫ڦ‬ሗො‫ڦݴׯ‬༬ۨೕ୲၎࠲ăሗො‫ݴׯ‬ཚ
ࡗ၌‫ీࠀޗ‬ገ࣑ྺ၎࿋ई้Ⴞဃֶ)۶‫ྺ׬ײࡗڦ*ۯ‬BNई
QNገ࣑ăසࡕ३ၭ୳հഗ‫)੻ټڦ‬૧ᆩਏᆶ‫گ‬পኹೕ୲‫ڦ‬
‫گ‬ཚ୳հഗई૧ᆩ‫ټ‬ཚ୳հഗ*Ljሗොሯำଉॽࣷই‫گ‬Lj৊
ܸ३ၭ໯ׂิ‫้ڦ‬क़۶‫܈ޗڦۯ‬ă!
้क़۶‫܈ޗڦۯ‬ᇑሗො‫)܈ޗڦݴׯ‬၎‫ܔ‬ᇀएհ‫ڦ‬უӦ୲ܸ
ჾ*‫ׯ‬Բ૩ăEET๼‫ྺ؜‬ኟ၀հLjᅺُഄუӦ୲ᇑ႑ࡽೕ୲
ࢅ‫ׯ܈ޗ‬Բ૩ăEBD๼‫؜‬ᇑ၌‫ޗ‬ഗ๼෇ኮक़‫ڦ‬ሯำ᳘ࢇLj
Ԉઔઠጲ၌‫ޗ‬ഗԨว‫ڦ‬ഗॲሯำLjᄺࣷᆅഐ۶‫ۯ‬ăᅃӯܸ
ჾLj၌‫ޗ‬ഗ๼෇‫ڦ܋‬უӦ୲ሁߛLj‫ܔ‬᳘ࢇሯำᆅഐ‫ڦ‬۶‫ۯ‬
ሁփ௺ߌăუӦ୲ᇑೕ୲ࢅ‫ׯ܈ޗ‬Բ૩Ljᅺُ༵ߛඪᅃ֖
ຕ਩੗߀฀۶‫ۯ‬Ⴀీă!
ྺ๑एᇀEET‫้ڦ‬ዓဣཥ‫ڦ‬۶‫ۯ‬ፌၭLj࠲॰ሞᇀॽEBD๼
‫؜‬უӦ୲༵ߛ‫ڟ‬ፌ‫ٷ‬Ljժ‫ܔ‬EETሗො‫ํݴׯ‬ႜᆶၳ‫୳ڦ‬
հăူ௬‫ڦ‬ᅃဣଚํᄓຕ਍‫ݒ‬ᆙକኄၵᄲ‫ۅ‬ă
Rev. 0 | Page 2 of 8
AN-823
཮2ዐ‫ۉڦ‬ୟ๟ᅃ߲एᇀDDS‫้ڦ‬ዓ݀ิഗLjᆯᅃ߲DDS
तࢫዃ‫ڦ‬ዘࠓ୳հഗࢅAD9515้ዓ‫ݴ‬ದഗॲፇ‫ׯ‬Ljᆩઠྺ
ఇຕገ࣑ഗ(ADC)༵ࠃ֑ᄣ้ዓăDDSဣཥ้ዓᆯRohde &
Schwarz SMA႑ࡽ݀ิഗׂิă჋ስଇ߲փཞDDS৊ႜ֪
๬ǖAD9958ࢅAD9858ă֪ଉ۶‫้ۯ‬Lj๑ᆩDDSࢅAD9515
ྺADC༵ࠃ้ዓLjADC‫ܔ‬ᅃ߲߅৫‫ڦ‬170 MSPSኟ၀հ৊ႜ
֑ᄣă֪๬໯ᆩ‫ڦ‬ADCྺ14࿋Ă100 MSPSഗॲAD6645ăཚ
ࡗೠࠚADC‫ݥݴྲڦ‬၍Ⴀࢅඤሯำ‫ڦڥ֪ܔ‬SNR)႑ሯԲ*
‫ࠋڦ‬၅Lj඗ࢫᆌᆩएᇀDDS‫้ڦ‬ዓժ֪ଉSNRLjՍ੗૧ᆩ
ူ๕໙‫؜‬एᇀDDS‫้ڦ‬ዓ໯ሺे‫ڦ‬۶‫ۯ‬ă
ഄዐǖ
SNRྺADC‫ߛڦ‬ೕSNRă
Nྺገ࣑ഗ‫ڦ‬࿋ຕă
εྺገ࣑ഗ‫ڦ‬ೝ਩ྲ‫ݥݴ‬၍Ⴀ(DNL)ेฉඤሯำă
fIFྺADC‫ڦ‬ዐೕ(IF)ఇె๼෇ೕ୲ă
ᆶ࠲ُࠅ๕तසࢆᆩᇀೠࠚADC֑ᄣ้ዓ۶‫ۯ‬༬Ⴀ‫ܠ߸ڦ‬
႑တLj൩֖੊ADIᆌᆩԴऻAN-501ă
AD6645
WENZEL
AIN = 170.3 MHz
AD9958, AD9858
ENCODE
LPF/BPF
AD9515
PECL
ROHDE AND SCHWARZ SMA GENERATOR
500MHz AND 1GHz @ = 6 dBm
཮ 2.
एᇀDDS‫้ڦ‬ዓ݀ิഗࢅ۶‫֪ۯ‬ଉ‫ۉ‬ୟ
Rev. 0 | Page 3 of 8
05758-002
DDS
AN-823
࠲ᇀ֪๬ࢅ঳ࡕ‫ڦ‬༪ஃ
࿢்๑ᆩ཮2໯๖ದዃ৊ႜକᅃဣଚ۶‫֪ۯ‬ଉLjᅜՍଉࣅ
୳հࢅೕ୲ࡀࣄ‫ڦ‬ᆖၚă
࿢்इ‫ڥ‬କኍ‫ܔ‬ෙዖೕ୲‫ڦ‬۶‫ۯ‬ຕ਍ă‫ܔ‬ᇀ௅ዖೕ୲Lj࿢
்ᆩෙዖփཞ‫୳ڦ‬հഗದዃઠ֪๬უӦ୲)ೕ୲*ࢅ‫੻ټ‬၌
዆‫ڦڥ֪ܔ‬۶‫ڦۯ‬ᆖၚăཞ้၂๖କ௅ዖยዃ‫ڦ‬๼‫୲ࠀ؜‬
຤ೝLjᅜՍ॔੦௅ዖ֪๬ཉॲူ၌‫ޗ‬ഗ๼෇‫ڦ܋‬უӦ୲ă
Ք‫୳׬‬հഗ‫੻ټ‬ยዃྺ֑ᄣ໏୲‫ڦ‬ሀ40%Ljኄ๟੻‫ټ‬DDS
ᆌᆩዐยዃገችೕ୲‫ڦ‬ᅃӯࡀሶă‫ܔ‬ᇀփႴᄲ੻‫ྷݔ੻ټ‬
‫ڦ‬ᆌᆩLj੗ᅜॽ୳հഗ‫੻ټ‬ยዃྺగᅃኵLj๑‫ڥ‬ገችೕ୲
ടࡻ୼ߛᇀ໯Ⴔ‫ڦ‬ፌߛ๼‫؜‬ೕ୲ăኄᄣፔ‫ڦ‬ᅪ཮๟ᅜۙၿ
‫پྺ੻ټ‬ॏઠ߀฀۶‫ۯ‬ႠీăፌࢫLj཮ 2‫ڦ‬۶‫֪ۯ‬ଉದዃ
๑ᆩᅃ߲5%‫ټ‬ཚ୳հഗăኄᄣ੗ᅜ୳‫ٷأ‬և‫ټ੻ݴ‬ሯำࢅ
ሗො‫ݴׯ‬Ljܸٗइ‫ڥ‬ፌॅ۶‫ۯ‬ႠీLj‫ڍ‬ඍ‫ۅ‬๟ࣷဎึ‫ٷ‬և
‫ۙݴ‬ၿ‫੻ټ‬ăሞೕ୲ԍ‫้ڦ࢛ۨ׼‬ዓᆌᆩዐLjኄᅃඍ‫ۅ‬࿮
࠲৆ᄲă
ईუӦ୲ᅜत३ၭ୳հཚ‫ټ‬Lj੗ᅜ߀฀۶‫ۯ‬Ⴀీă
‫ړ‬๼‫ྺ؜‬38.88 MHzĂ֑ᆩ୼‫گ‬ᇀలઊຯ༬ೕ୲‫گڦ‬ཚ୳հ
ഗ้Lj۶‫ۯ‬ፌ‫ٷ‬Ljሀྺ4 ps)਩‫*ߵݛ‬Ǘ‫ړ‬๼‫ྺ؜‬155 MHzĂ
֑ᆩ5%୳հഗ้Lj۶‫ۯ‬ፌၭLjሀྺ700 fsă௅ዖ൧઄ူLj
AD9515‫ీۼ‬ໜጣഄ๼‫؜‬ೕ୲‫ڦ‬Ԡইܸԍ‫׼‬႑ࡽ‫ڦ‬۶‫ۯ‬Ⴀ
ీăኄ๟AD9515तૌຼׂ೗)֖९՗4*‫ڦ‬ዘᄲ༬ႠLjኟ๟
ኄዖ༬ႠᇑDDS‫ڦ‬ፇࢇLj֍ํ၄କፌ‫گ‬዁19 MHzೕ୲‫ڦ‬ೄ
௱(ps)ᅜူ۶‫ۯ‬Ⴀీă൩ጀᅪLjසࡕDDS኱থሞ19 MHzူ
ൻ‫ݛۯ‬հഗॲLjሶമຎუӦ୲ၳᆌॽ๑‫ڥ‬ฉຎ঳ࡕవᅜํ
၄ă
ྺ৊ᅃօඓණ۶‫ۯ‬ᇑუӦ୲၎࠲Lj࿢்֑ᆩAD9858 DDSइ
‫ڥ‬କ߸‫ܠ‬ຕ਍)՗2*ă޿ഗॲీࠕၠ50 Ω޶ሜ༵ࠃ40 mA๼
‫ୁۉ؜‬Lj๼‫ߛ߸୲ࠀ؜‬Lj၎࠲‫ڦ‬უӦ୲߸‫ٷ‬ă
AD9958ࢅAD9959ྺ‫ܠ‬ཚ‫ڢ‬DDSഗॲLjഄ๼‫؜‬੗ᅜ၎ेLj
ᅜ༵ߛ๼‫୲ࠀ؜‬ă
՗1ଚ‫؜‬କAD9958‫֪ڦ‬๬ຕ਍ăኄၵຕ਍ኤ௽ǖ༵ߛೕ୲
՗ 1ǖAD9958ࢅAD9515‫ڦ‬۶‫ۯ‬ၚᆌᇑ๼‫؜‬ೕ୲Ăࠀ୲Ăೕ୲Ă୳հഗ‫࠲ڦ੻ټ‬ဣ
ׂ೗!
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
AD9958/AD9515
DDS
֑ᄣ໏୲
(MHz)
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
DDS
๼‫؜‬ೕ୲
(MHz)
38.88
38.88
38.88
38.88
38.88
38.88
77.76
77.76
77.76
77.76
77.76
77.76
155.52
155.52
155.52
155.52
DDS
๼‫୲ࠀ؜‬
(dBm)
−3.6
−3.6
−4.7
−4.7
−3.3
−3.3
−3.8
−3.8
−4.9
−4.9
−3.8
−3.8
−5.5
−5.5
−5.6
−5.6
DDS
ዘࠓ୳հഗ
(MHz)
200 LPF
200 LPF
47 LPF
47 LPF
5% BPF
5% BPF
200 LPF
200 LPF
85 LPF
85 LPF
5% BPF
5% BPF
200 LPF
200 LPF
5% BPF
5% BPF
Rev. 0 | Page 4 of 8
AD9515
‫ݴ‬ೕഗ
๼‫؜‬ยዃ
1
2
1
2
1
2
1
2, 4
1
2, 4
1
2, 4
2
4, 8
2
4, 8
AD9515
๼‫؜‬ೕ୲
(MHz)
38.88
19.44
38.88
19.44
38.88
19.44
77.76
38.88, 19.44
77.76
38.88, 19.44
77.76
38.88, 19.44
77.76
38.88, 19.44
77.76
38.88, 19.44
਩‫ߵݛ‬
۶‫ۯ‬
(ps)
4.1
4.1
2.4
2.4
1.5
1.5
2.5
2.5
1.5
1.5
1.1
1.1
1.5
1.5
0.68
0.68
AN-823
՗ 2၂๖କAD9858ᇑ5%‫ټ‬ཚ୳հഗĂ225 MHz‫گ‬ཚ୳հഗ
ሞ߳ዖDDS๼‫୲ࠀ؜‬຤ೝ้‫֪ڦ‬ଉ঳ࡕăᇑᇨ೺‫ڦ‬൧઄ᅃ
ዂLj༵ߛࠀ୲ࢅই‫੻ټگ‬੗ᅜ߀฀۶‫ۯ‬Ⴀీă૧ᆩ5%‫ټ‬ཚ
୳հഗLj੗ປ३DAC‫ٷڦ‬և‫ݴ‬ሗොăኄዖ൧઄ူLj۶‫ۯ‬ሞ
߸‫܈ײٷ‬ฉൽਦᇀDAC๼‫؜‬ᇑ၌‫ޗ‬ഗ๼෇ኮक़‫ڦ‬ሯำ᳘
ࢇLj۶‫ۯ‬ই‫گ‬ᇑუӦ୲༵ߛኮक़‫܈ߛڦ‬၎࠲Ⴀኤ௽କኄᅃ
‫ۅ‬ă
ኄၵຕ਍࣏၂๖Lj‫ܔ‬ᇀ၎ຼ‫୲ࠀڦ‬຤ೝࢅ‫੻ټ‬Lj֑ᆩ
AD9858Բ֑ᆩAD9958ీइ‫ڦࡻ߸ڥ‬۶‫ۯ‬ႠీăփཞDDS
ׂ೗‫ڦ‬ሗොႠీᆶֶᅴLj‫ڞ‬ዂ۶‫ۯ‬Ⴀీֶ֖փഋă჋ስ้
ዓᆌᆩ‫ڦ‬DDS้LjᅃӯܸჾLjਏᆶፌॅ࿮ሗො‫ۯ‬ༀ‫ྷݔ‬
(SFDR)‫ڦ‬ഗॲీ༵ࠃፌॅ‫ڦ‬۶‫ۯ‬ႠీăAD9858‫֑ڦ‬ᄣ໏
୲ᄺᇺߛᇀAD9958Ljᅺُएհೕ୲‫ڦ‬৥ၟࢅড‫گ‬঩ၿհ৊
ᅃօศ෇ዘࠓ୳հഗೕ୲ၚᆌ‫ڦ‬ፆ‫ాྷݔټ‬ă
ٗDACዘࠓ୳հഗइ‫ڥ‬໯Ⴔ‫ڦ‬ፆ‫ټ‬ປ३ࢅኝ༹Ⴀీժ‫ݥ‬ᅟ
๚ă୳հഗ‫ڦ‬सิၳᆌतPCBӱ‫ڦ‬քਆၳᆌࣷᆖၚ୳հഗ
‫ڦ‬૙ၙၚᆌ༬Ⴀăසࡕፆ‫ټ‬ປ३๴‫ڟ‬ᆖၚLjժᆯُ‫ڞ‬ዂ‫ټ‬
ྔሯำઍཚLj۶‫ۯ‬Ⴀీ৽ࣷই‫گ‬ă
՗2ǖAD9858ࢅAD9515‫ڦ‬۶‫ۯ‬ၚᆌᇑ๼‫؜‬ೕ୲Ăࠀ୲Ăೕ୲Ă୳հഗ‫࠲ڦ੻ټ‬ဣ
ׂ೗
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
AD9858/AD9515
DDS
֑ᄣ໏୲
(MHz)
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
DDS
๼‫؜‬ೕ୲
(MHz)
155.52
155.52
155.52
155.52
155.52
155.52
155.52
155.52
155.52
155.52
155.52
155.52
DDS
๼‫୲ࠀ؜‬
(dBm)
+7.7
+7.7
+7.7
+7.7
+2.6
+2.6
+1.1
+1.1
−3.2
−3.2
−4.6
−4.6
DDSዘࠓ୳հഗ
(MHz)
225 LPF
225 LPF
5% BPF
5% BPF
225 LPF
225 LPF
5% BPF
5% BPF
225 LPF
225 LPF
5% BPF
5% BPF
Rev. 0 | Page 5 of 8
AD9515
AD9515
๼‫؜‬ೕ୲
๼‫ݴ؜‬ೕഗยዃ (MHz)
2
77.76
4,8
38.88, 19.44
2
77.76
4, 8
38.88, 19.44
2
77.76
4, 8
38.88, 19.44
2
77.76
4, 8
38.88, 19.44
2
77.76
4, 8
38.88, 19.44
2
77.76
4, 8
38.88, 19.44
਩‫ߵݛ‬
۶‫(ۯ‬ps)
0.56
0.56
0.33
0.33
0.63
0.63
0.42
0.42
0.73
0.73
0.64
0.64
AN-823
ຍᇕ
้क़۶‫!ۯ‬
৽ԨᆌᆩԴऻܸჾLj۶‫ۯ‬ᅃَ๟ኸ้क़۶‫ۯ‬ă၎࿋ሯำ๟
ᅃዖೕᇘ၄ၡăሞ้ᇘాLj޿ၳᆌ՗၄ྺ้क़۶‫ۯ‬ă࠵ִ
ኟ၀հ้Lj૶Ⴤࡗଭ‫้ڦ‬क़ժփࠦۨă‫ݛ‬հዐLj้क़۶‫ۯ‬
՗၄ྺՉᄂೋ૗ഄ૙ၙ)ࡀሶ*‫؜ڦ‬၄้क़ăኄଇዖ൧઄
ူLjํा้Ⴞᇑ૙ၙ้Ⴞ‫ڦ‬ೋֶनྺ้क़۶‫ۯ‬ăኄၵೋֶ
Ԩዊฉ๟ໜऐ‫ڦ‬Ljᅺُࡀ้ۨक़۶‫ڇڦۯ‬࿋ྺ਩‫(ߵݛ‬rms)
௱Lj‫ܔ‬ᆌᇀᅃ߲ኟༀ߁୲௢‫ࡧ܈‬ຕೝ਩ኵ޹ৎᅃ߲Քጚֶ
‫ڦྷݔ‬௬ओă
DDS
৽ԨᆌᆩԴऻܸჾLjDDS๟ኸຕጴ੦዆ና‫ږ‬ഗ(NCO)ᇑຕ
ఇገ࣑ഗ(DAC)‫ڦ‬ፇࢇă
՗ 3ǖADIࠅິߛೕDDSׂ೗
DDSׂ೗჋ስ
ፌ‫֑ٷ‬ᄣ໏୲(MHz)
ೕ୲ۙၿ‫ݴ‬Ր୲(࿋) DAC஢ଉ‫(ୁۉײ‬mA) DAC‫ݴ‬Ր୲(࿋)
๼‫؜‬ཚ‫ڢ‬ຕ
AD9858
AD9958
AD9959
AD9956
AD9540
AD9859
AD9951
AD9952
AD9953
AD9954
AD9852
AD9854
AD9851
AD9850
AD9830
1000
500
500
400
400
400
400
400
400
400
300
300
180
125
50
32
32
32
48
48
32
32
32
32
32
48
48
32
32
32
40
10
10
15
15
15
15
15
15
15
20
20
20
20
20
10
10
10
14
10
10
14
14
14
14
12
12
10
10
10
1
2
4
2
2
1
1
1
1
1
1
2
1
1
1
ፌ‫ٷ‬๼‫؜‬ೕ୲(MHz)
0 to 1600
0 to 1600
0 to 800
0 to 1200
0 to 1200
0 to 1200
ኝຕ‫ݴ‬ೕԲ
1 to 32
1 to 32
1 to 32
1 to 32
1 to 32
1 to 32
๼‫؜‬ཚ‫ڢ‬ຕ
2
3
3
5
5
8
๼‫ۉ؜‬ೝ
(ᅺཚ‫ڢ‬փཞܸᅴ)
LVDS/CMOS/LVPECL
LVDS/CMOS/LVPECL
LVDS/CMOS
LVDS/CMOS/LVPECL
LVDS/CMOS/LVPECL
LVDS/CMOS/LVPECL
՗ 4ǖADIࠅິ้ዓ‫ݴ‬ದׂ೗
‫ݴ‬ೕഗׂ೗჋ስ
AD9515
AD9514
AD9513
AD9512
AD9511
AD9510
ፌ‫ٷ‬๼෇ೕ୲(MHz)
0 to 1600
0 to 1600
0 to 1600
0 to 1600
0 to 1600
0 to 1600
Rev. 0 | Page 6 of 8
AN-823
ጀ๥
Rev. 0 | Page 7 of 8
AN-823
ጀ๥
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
AN05758-0-2/06(0)
Rev. 0 | Page 8 of 8
Similar pages