AN-851: 一种WiMax双下变频IF采样接收机设计方案[中文版] (Rev. 0) PDF

AN-851
ᆌᆩԴऻ
One Technology WaZtP.O. Box 9106t/Prwood, MA 02062-9106, U.S.A.t Tel: 781.329.4700tFax: 781.461.3113twww.analog.com
ᅃዖWiMaxມူՎೕIF֑ᄣথ๭ऐยऺ‫ݛ‬ӄ
ፕኁǖ&SJD/FXNBOࢅCecile Masse
०঻
‫ࠀׯ‬঴ஓ0 dBm‫ڦ‬๼෇‫ۉ‬ೝLj‫ڍ‬၎࠲ยԢՂႷీࠕ‫׶‬๴ড‫ٷ‬
ԨᆌᆩԴऻኼሞ௮ຎᅃዖ௬ၠ2.3 GHz዁2.36 GHz࿮၍ཚრ
‫ڦ‬0 dBm๼෇‫ۉ‬ೝܸփ໦࣋ă
‫ޜ‬ခ(WCS)ೕ܎ᅜत2.4 GHz዁2.48 GHz௨ኴቷISMೕ܎‫ڦ‬ዐ
਍802.16Քጚ໯ຎLj‫ܔ‬থ๭ऐᆶ၎ତཚ‫ڢ‬ᅞ዆‫ڦ‬ᄲ൱ăՂ
ೕ(IF)֑ᄣথ๭ऐă޿থ๭ऐยऺᆩᇀ੻‫ټ‬ኟ঍ೕ‫ްݴ‬ᆩ
Ⴗॽ၎ତࢅ‫ݥ‬၎ତཚ‫߅ڢ‬ඡᇸᇑణՔཚ‫୲ࠀڦڢ‬Բԍ‫׼‬ሞ
(OFDM)ဣཥLj൩֖ለIEEE 802.16Քጚ࿔‫ڗ‬ዐ‫ڦ‬ᆶ࠲௮ຎă
ူଚ຤ೝLj๑ဃஓ୲(BER)ྼ‫׼‬ᇀ10−6࿋Ljժ๑ణՔ႑ࡽߛ
Ԩ࿔࣏ॽ༪ஃ၎ᆌ‫ڦ‬ยऺ‫ํࢅ݆ݛ‬แ‫ײ‬ႾLjᅜ‫ݛ‬Սยऺට
ᇀኸۨएጚଳ௺‫܈ޗڦ܈‬փ‫ࡗג‬3 dBă
ᇵႪ߀থ๭ऐ႑ࡽ૾Lj஢ፁ࿮၍੻‫(ټ‬WiBro)‫ڪ‬ೕ܎ᅜत
TDS-CDMAኮૌ‫ڦ‬ഄ໱‫ނ‬࿡ཚ႑ՔጚኮႴă঺ዺ࿔ዐ༵‫ڟ‬
՗1. 802.16-2004Քጚࡀۨ‫ڦ‬၎ତࢅ‫ݥ‬၎ତཚ‫ڢ‬ᅞ዆ᄲ൱
‫ڦ‬՗௬ำհ(SAW)୳հഗLjԨ࿔༪ஃ‫ڦ‬ยऺీࠕ‫ت‬૙ፌߛ
‫ٳ‬10 MHz‫ڦ‬ཚ‫੻ټڢ‬Ǘཚࡗ๑ᆩ‫ڦ੻߸੻ټ‬ཚ‫ڢ‬჋ስ୳հ
ഗժ༵ߛ֑ᄣ୲Ljሶ੗ᅜ঴ਦ߸‫੻ټڦٷ‬ă
ԝৠኪ๎
OFDM๟ ူ ᅃ ‫ پ‬ႎ ႗ WiMaxՔ ጚ ዐ ๑ ᆩ ‫ ۙ ڦ‬዆ ‫ ݛ‬ӄ ă
OFDM૧ᆩIQۙ዆փཞ‫ޭ߲ܠڦ‬ሜհLjઠํ၄փ๴‫ܠ‬০‫د‬
խᆖၚ‫ߛڦ‬਋णຕ਍‫د‬๼໏୲ăए‫ټ‬႑တકොᇀޭሜհኮ
ዐLjᅺُLj‫د߲ܠړ‬խୟ০‫ڞ‬ዂ೦࣋Ⴀ߅ඡժჹዘປ३և
‫ݴ‬ཪพ೷้Ljबࢭփࣷሰ‫ׯ‬႑တ۪฿ăޭሜհۙ዆‫ݛ‬ӄ‫ڦ‬
੗ՎႠྺጲ๢ᆌ๕႑ସఇ๕༵ࠃକ੗ీLj޿ఇ๕ీᅜፌ‫ٷ‬
ਐ૗৊ႜ‫گ‬໏‫د‬խLjܸ‫ړ‬থ๭႑ሯԲ(SNR)ডߛ้ሶ੗֑
ᆩፌߛຕ਍໏୲ă
ޭሜհۙ዆‫ݛ‬ӄतՊஓ‫ܠڦ‬ᄣႠ‫ܔ‬থ๭ऐ༵‫؜‬କփཞ‫ڦ‬
SNRᄲ൱ăߵ਍IEEE Std. 802.16-2004ՔጚۨᅭLjWiMaxথ๭
ऐ‫ڦ‬एጚଳ௺‫܈‬ǖ֑ᆩ½Պஓ୲QPSK‫ڦ‬1.5 MHzཚ‫ྺ܈੻ڢ‬
−91 dBmǗ֑ᆩ¾Պஓ୲64-QAM‫ڦ‬20 MHzཚ‫ྺ܈੻ڢ‬−65
dBmăኄ৽ᄲ൱থ๭ऐNFྺ7 dBLjԈઔ5 dB‫ڦ‬ኴႜᇧଉă
ۙ዆/Պஓ
16-QAM-¾
64-QAM-¾
၎ତཚ‫ڢ‬ᅞ዆(dB)
−11
−4
‫ݥ‬၎ତཚ‫ڢ‬
ᅞ዆(dB)
−30
−23
ॐࠓ
཮1໯๖ྺᅃዖ‫ۆ‬႙‫ڦ‬ມူՎೕIF֑ᄣথ๭ऐăIF֑ᄣॐࠓ
‫׉ݥ‬๢ࢇ‫ت‬૙WiMaxई‫ܠ‬ሜհဣཥ໯֑ᆩ‫ٷڦ‬႑ࡽ‫੻ټ‬ă
঺ዺ‫ူܠ‬ՎೕLj੗ᅜᆩ‫߲ܠ‬ཚ‫ڢ‬჋ስ୳հഗઠӻዺ༵ߛথ
๭ऐ‫ڦ‬ଳ௺‫܈‬Lj༵ߛ‫ܔ‬੗ీ‫ڞ‬ዂথ๭ऐଳ௺‫܈‬ই‫ڦگ‬ፆ෗
႑ࡽ‫ੇڦ‬ඡ‫܈‬ăມူՎೕ࣏ሎႹ๑ᆩፁࠕߛ‫ڼڦ‬ᅃIFLjഄ
ዐLj৥ၟೕ୲‫؜גټ‬କമ‫܋‬ೕ܎჋ስRF୳հഗ‫ڦ‬ཚ‫ݔټ‬
ྷă
ԨᆌᆩԴऻ໯ຎথ๭ऐॐࠓ๟ᅜ14࿋ADCྺए‫ڦإ‬ă৑࠶
12࿋ADCन੗஢ፁ802.16থ๭ऐ‫ڦ‬ႴᄲLj‫ॺڍ‬ᅱሞ‫ူڇ‬Վ
ೕई‫ܠ‬ሜհॐࠓዐ๑ᆩ14࿋ADCLjᅜՍց‫׋‬ၳ୲ড‫ڦگ‬჋
ስႠీLjՆ௨ADCሞߛ߅ඡᇸ‫ۉ‬ೝ൧઄ူ݀ิԏࢅăྺକ
ยऺᅃዖీࠕ‫ࠀׯ‬ᆌ‫ܠܔ‬ຕ਍໏୲ኮႴ‫ڦ‬থ๭ऐLjՂႷ৉
ั჋ስIFዐ႐ೕ୲Ljժඓԍᆶࢇ๢‫ڦ‬੗ᆩSAW୳հഗă
802.16Քጚॽ‫ࠀׯ‬ॠ֪‫ڦ‬ፌ‫ٷ‬๼෇ࠀ୲຤ೝۨᅭྺ−30
dBmLjፌ‫ٷ‬ඹ၌ࠀ୲຤ೝྺ0 dBmă໚඗एበࢅᆩࢽበփీ
Rev. 0 | Page 1 of 8
AN-851
ADF4360-8
~100
BAND
SELECT
ATF541M4
ATF541M4
IMAGE
REJECT
LNA1
AV = –1.5dB
AV = +14.5dB
NF = 0.9dB
IIP3 = 18dBm
SAWTEK
855898
LO1
LCR
LPF
LO2
LNA2
AV = –2.5dB
AD8370
~1k
LCR
AAF
IF DGA
AV = +14.5dB
NF = 0.9dB
IIP3 = 18dBm
ADL5350
AV = –8dB
AV = –7.5dB
NF = 7.5dB
IIP3 = 24dBm
AD8344
AV = +10dB
AV = –1dB
AV = +11.5dB
AV = –15dB TO +34dB
NF = 8dB
NF = 8dB (AT MAX GAIN)
IIP3 = 12dBm
OIP3 = 35dBm
AD9246 FULL SCALE =
–3dBV rms
ADC
en = 21nV/ Hz
IIP3 = 33dBV rms
AV = 0dB
NF = 20.5dB
IIP3 = 33dBm
06147-001
ADF4153
཮ 1. ມူՎೕIF֑ᄣথ๭ऐยऺ
཮2໯๖ྺ֑ᆩ‫گ‬Ԩና‫ူڦ‬Վೕंೕഗ‫ڦ‬ሗොࡆगăྺକ
থူઠႴᄲ੊୯ፌዕIFă‫ူܾڼ‬Վೕंೕഗਏᆶ๼෇‫੻ټ‬
ޮ߃2.3 GHz዁2.4 GHzೕ܎ժ३ณ੗ీ߅ඡణՔ႑ࡽ‫ڦ‬ሗො
ড቏‫ڦ‬ᆫ๞Ljᅃӯփ‫ࡗג‬20 MHzăኄᄣ৽੗ᅜ੊୯ຕዖ੗
‫ڦݴׯ‬ຕଉLj࿢்‫ܔ‬ሗොࡆग৊ႜକ੊ִLj঳ࡕ՗௽‫ڼ‬ᅃ
ీ‫ܾڼڦ‬IFLj‫ٗྷݔ‬10 MHz‫ڟ‬70 MHzփ‫ڪ‬LjডߛIFೕ܎ሶ
IFᆌሞ210 MHz዁400 MHz‫ాྷݔڦ‬ăࣨᆖ൶ᇘ՗๖֑ᆩ‫گ‬
णዐᇀ107 MHzࢅ140 MHzăྺକՆ௨߸ߛ঩‫ڦ‬LOၿհLjሞ
Ԩና(LO1 = 1926 MHz዁2026 MHz)ׂิ374 MHzዐೕ‫ڦ‬ၭ
ُ჋ስକ70 MHz IFLjᅺྺߛ঩ၿհ੗ీ୑࣮ཀ၍থ๭‫܋‬੨
ຕ‫੻ټ‬Ljহ၌ྺfRF/fLOࢅfIF/fLOăᄺ੗ᅜ‫پ‬ᅜഄ໱IFዐ႐ೕ
ժ৊෇ణՔথ๭ೕ܎ă‫ُأ‬ᅜྔLj70 MHz IF࣏ሎႹ๑ᆩዚ
୲Lj‫ڍ‬ՂႷၭ႐Ljඓԍ‫ڼ‬ᅃंೕഗ‫ڦ‬ሗොၚᆌփࣷ‫ڞ‬ዂཚ
‫׉ܠ‬९‫ڦ‬SAW୳հഗईणጺᇮॲLC࿮ᇸ୳հഗă
‫߅ాڢ‬ඡă‫ړ‬മยऺዐLj჋ስକ374 MHz‫ڼڦ‬ᅃIFă‫ܔ‬ᇀ޿
ዐ႐ೕ୲Ljణമ๨‫ׇ‬ฉᆶSawtek‫ڪ‬዆ሰฆิׂ‫ܠ߃ޮڦ‬ዖ
‫ڦ੻ټ‬ຕዖSAW୳հഗă
ሞඓۨణՔIFೕ୲ࢫLj੗ᅜ੊୯प૴Ⴀీă՗2௮ຎକມူ
Վೕথ๭ऐٗೕ܎჋ስ୳հഗ๼‫ڟ܋؜‬ADCথ੨‫ڦ‬ᇨ೺‫ۯ‬
ༀႠీă
0.5
2L
-
-2R
3L
fIF
fLO
0.6
0.4
0.3
R
-2
4L
3R
5L-
0.7
2R
3R
-5L 3L
0.8
՗2. ཮1໯๖থ๭ऐ႑ࡽ૾‫ڦ‬ᇨ೺‫ۯ‬ༀႠీ
ሺᅮ(dB)
65.5
58.5
48.5
37
23.5
L
R-
3R
-4L
0.9
2R
-2L
4R-4
L
3R3L
1.0
1.7
1.8
R
1.0
3R
4L-
0.2
0.1
1.1
1.2
1.3
1.4
1.5
1.6
1.9
fRF
fLO
2.0
06147-002
0
1.0
཮ 2. ֑ᆩ‫گ‬Ԩና‫ူڦ‬Վೕंೕഗ‫ڦ‬ሗොࡆग
(ጀᅪLjࣨ઀՗๖ኍ‫ܔ‬2.3 GHz዁2.4 GHz WiBroೕ܎Lj
֑ᆩ‫گ‬ԨናLjׂิ374 MHz IF‫ڦ‬ၭຕ‫੻ټ‬হ၌ă)
.
Rev. 0 | Page 2 of 8
IIP3 (dBm)
−32.8
−26
−14.5
−7.7
−5.6
NF (dB)
2.6
2.7
3.5
4.6
9.7
AN-851
ํ၄‫݆ݛ‬
থ๭ऐ૾ዐ‫ڼڦ‬ᅃ߲ഗॲ๟ೕ܎჋ስ୳հഗăAnatech
25
5
20
4
15
3
10
2
5
1
Electronics, Inc.ĂK&L Microwave Inc.ᅜतDigital Communications Inc.‫ڪ‬዆ሰฆኍ‫ܔ‬2.3 GHz዁2.5 GHz WiMaxᆌᆩዐ๑
୲ৈྺ25 MHz้Ljፆ‫ټ‬ᅞ዆੗‫ٳ‬60 dBă‫ׯ‬Ԩ߸‫ڦگ‬༩ٍ୳
հഗሞ150 MHzೋᅎူీ༵ࠃৎ~50 dB‫ڦ‬ፆ‫ټ‬ᅞ዆ăೕ܎჋
ስ୳հഗ‫ڦ‬჋ስሞ࢔‫܈ײٷ‬ฉൽਦᇀথ๭ऐ‫ڦ‬৥ၟᅞ዆Ⴀ
NF (dB)
ഗăഹ༹୳հഗ‫෇֭ڦ‬໦ࡼ࢔‫گ‬Ljփ‫ڟ‬2 dBLj‫ړ‬ೋ૗ዐ႐ೕ
GAIN (dB)
ᆩ‫ڦ‬WCSत௨ኴቷISMೕ܎༵ࠃକഹ༹୳հഗࢅ༩ٍ୳հ
ႴᄲLj࿢்჋ስକDigital Communications Inc.ิׂ‫ڦ‬10܎ཚ
0
2100
‫ټ‬ഹ༹୳հഗLjഄዐ႐ೕ୲ྺ2350 MHză
2200
2300
2400
2500
0
2600
FREQUENCY (MHz)
06147-004
ీLjᅜत߾ፕೕ܎޹ৎ‫߅ڦ‬ඡ႑ࡽ‫ڦ‬ᇨ೺‫ٷ‬ၭă‫؜‬ᇀᄇ๖
཮4. ATF541M4ሺᅮࢅ NFLj֪‫ڥ‬๼෇࣮໦ྺ−8dBLj
IIP3ྺ18dBm
‫ڼ‬ᅃLNAपሞമ‫܋‬Ăೕ܎჋ስ୳հഗኮࢫă޿୳հഗ‫֭ڦ‬
෇໦ࡼᅜत‫ڼ‬ᅃप‫ڦ‬ሯำဣຕਦۨথ๭ऐ‫ڦ‬ጺ༹प૴ଳ௺
‫܈‬ă঳ࡕLjሞ‫ڼ‬ᅃLNAपዐํ၄ट‫ڦگ‬ሯำဣຕ၂‫ڥ‬዁࠲
ྺକӻዺ߀฀മ‫܋‬ยऺ‫ڦ‬৥ၟᅞ዆ႠీLj३ณ‫ڼ‬ᅃंೕഗ
ዘᄲă੊୯‫ڟ‬ഄ‫گ‬ሯำࢅߛ๼‫؜‬ෙ঩঍ۙপ‫(ۅ‬OIP3)‫ڦ‬༬
‫׶‬๴‫ټ੻ڦ‬ሯำLj࿢்ሞ‫ڼ‬ᅃLNAࢅ‫ܾڼ‬LNAኮक़๑ᆩକ
‫ۅ‬Lj࿢்჋ስକAgilent Technologies‫؜‬೗‫ڦ‬ATF541M4 GaAs
ᅃ߲०‫ߛڦڇ‬ཚ୳հഗă६ᇀ‫ڼ‬ᅃೕ܎჋ስ୳հഗ੗ྺሞ
E-mode pHEMTă‫ڼ‬ᅃपLNAࢅ‫ܾڼ‬पLNA‫ۉڦ‬ୟํ၄ఇ๕
৥ၟೕ୲ူ‫؜‬၄‫߅ڦ‬ඡ႑ࡽ༵ࠃ60dBᅜฉ‫ڦ‬ᅞ዆LjᅺُLj
ᅞ዆ᄲ൱ժփ๟ๆ‫ݴ‬ዘᄲă૧ᆩ֑ᆩ‫گ‬Ԩናׂิ‫ڦ‬374
ස཮3໯๖Lj֪‫ڥ‬ሺᅮࢅNFႠీස཮4໯๖ă
MHzዐೕLjሞ2.3 GHz዁2.4 GHz๼෇ೕ୲‫ူྷݔ‬LjएԨ৥ၟ
5V
ೕ܎ྺ1552 MHz዁1652 MHzăሞ‫ڼ‬ᅃLNAपࢅ‫ܾڼ‬LNAप
10nF
1nF
294
1.21k
50
ኮक़ยऺକᅃ߲०‫ڦڇ‬3঩णጺᇮॲ୳հഗă޿୳հഗ‫ڦ‬
৥ၟೕ܎ᅞ዆Ⴀీᆫᇀ20dBLjሞణՔཚ‫෇֭ڦాټ‬໦ࡼ‫گ‬
32.4
ᇀ2.5dBă֪‫ڥ‬ೕ୲ၚᆌࢅ‫ۉ‬ୟํ၄ఇ๕ස཮5໯๖ă
8.2pF
8.2pF
0
5.6nH
–5
1.5nH
཮ 3. एԨLNA๖ᅪ཮
8.2pF
–15
S21 (dB)
3.3pF
06147-003
0.6pF
–10
–20
–25
–30
4.3nH
–35
2.2pF
–40
2.2nH
2.2nH
–45
–50
0
500
1000 1500 2000 2500 3000 3500 4000 4500 5000
FREQUENCY (MHz)
཮ 5. ०‫ڇ‬णጺᇮॲ৥ၟᅞ዆୳հഗํ၄ఇ๕त֪‫ڥ‬ၚᆌ
Rev. 0 | Page 3 of 8
06147-005
1.5nH
AN-851
12
30
25
ዃᅃ߲LO࣐؋‫ٷݣ‬ഗă޿ंೕഗཚࡗೌྔ୳հྪஏઠ߰૗
20
IIP3, IP1dB (dBm)
RF‫܋‬੨ࢅIF‫܋‬੨ă཮7໯๖ጱ‫ۉ‬ୟԈઔADL5350ंೕഗĂ
ྔև୳հഗྪஏLj࣏ᆶᅃ߲ྔևLO࣐؋ഗLjᆩᅜၠLOIN
ᆅগ༵ࠃፁࠕ‫ڦ‬ൻ‫ۯ‬ă
ଷႴሺेᅃ߲AD8353ሺᅮपLjᆩᇀॽPLL/VCOࢇ‫ׯ‬ഗ‫ۉ‬
9
6
3
15
IP1dB
10
0
5
–3
GAIN
0
ୟLOINᆅগ‫ڦت‬๼‫ٷݣ୲ࠀ؜‬዁~4dBm‫ڦ‬ൻ‫ۉۯ‬ೝăLO
–6
–9
–5
๼෇ᆅগ࣏ᆌᆩକഄ໱୳հഗLjᅜӻዺ३ณઠጲLOࢇ‫ׯ‬ഗ
‫ڦ‬ၿհాඹăኄ๟ᅃ߲०‫ڦڇ‬3঩‫گ‬ཚ୳հഗLj֑ᆩକण
–10
2200
ጺᇮॲăසࡕுᆶ޿୳հഗLjLO‫ْܾڦ‬ၿհॽ๑గၵ‫ྔܮ‬
CONVERSION GAIN (dB)
MHz‫ߛۨࠦڦ‬ዐೕăADL5350๟ᅃዖ‫܋ڇ‬࿮ᇸंೕഗLjా
IIP3
2250
2300
2350
2400
2450
–12
2500
RF FREQUENCY (MHz)
‫ߛڦ‬ೕሯำူՎೕ‫ׯ‬ణՔIFLj঳ࡕࣷই‫گ‬থ๭ऐ‫ڦ‬ଳ௺
06147-007
ሞ‫ܾڼ‬LNAपኮࢫLj႑ࡽཚࡗADL5350ंೕഗူՎೕ‫ׯ‬374
཮ 6. ADL5350ंೕഗ‫֪ڦ‬๬Ⴀీ
‫܈‬ă֪‫ڦڥ‬ADL5350(ԈઔྔևLO࣐؋ഗࢅ୳հഗྪஏ)‫ۯ‬
ሞူՎೕࡗ‫ײ‬ዐLjPLL‫ڦ‬၎࿋ሯำཚࡗਝओेᇀOFDMۙ
ༀႠీස཮6໯๖ăंೕഗ‫ڦ‬๼෇IIP3ᆫᇀ24dBmLjገ࣑໦
዆႑ࡽ‫ޭ߳ڦ‬ሜհኮฉăྺ३ณ‫ܔ‬থ๭ऐଳ௺‫ڦ܈‬ᆖၚLj
ࡼྺ~8dBLj‫ڇ‬Չ‫ټ‬NFă
ᆩᇀิ‫ׯ‬LO1‫ڼڦ‬ᅃ߲PLL๟߲ၭຕ‫ݴ‬ೕPLLă޿PLL֑ᆩ
ADF4153ࢇ‫ׯ‬ഗยऺܸ‫ׯ‬ăԿ࣍‫੻ټ‬ሀྺ30 kHzLj၎࿋۶
‫ࠚۯ‬໙ኵྺ0.3‫܈‬ă
ADL5350 EVALUATION BOARD
1nF
1
RFIF
RFIF
8
2
GND2
3
LOIN
GC
7
VPOS
6
4
GND1
GND1
5
3nH
100pF
2.2pF
2.7nH
3V
100pF
2.2pF
6pF
9.5nH
15nH
374MHz
IF OUT
0.7pF
3V
2.1nH
100pF
4.7μF
3V
VP
VDD
0.47μF
100nF
1nF
18pF
1nF
3dB PAD
18
100pF
AD8353
EVALUATION BOARD
VCO190-1960T
18
1.5k
100pF
CP
REFIN
ADF4153
600
MUXOUT
18
100pF
820pF 40nF
2.7nF
51
RFINA
CLK
DATA
LE
RFINB
RSET
10MHz
XTAL
REF
SPI
CONTROL
BUS
100pF
ADF4153 EVALUATION BOARD
཮7. ‫ڼ‬ᅃंೕူՎೕप
Rev. 0 | Page 4 of 8
06147-006
RF INPUT
FROM LNA2
SAWTEK
855898
1.5nH
ADL5350
1pF
0.67nH
AN-851
‫ڼ‬ᅃIF඗ࢫཚࡗ374 MHz SAW୳հഗLjᅜՍ৊ႜཚ‫ڢ‬჋ስă
඗ࢫཚࡗAD8344ᆶᇸंೕഗॽ୳հࢫ‫ڼڦ‬ᅃपIF႑ࡽူՎ
঺ዺSawtek 855898 SAW୳հഗ‫؜‬෥‫ڦ‬ፆ‫ټ‬ᅞ዆ႠీLjথ๭
ೕ዁70 MHz‫ܾڼڦ‬पIFăُ‫֑ت‬ᆩକᅃዖ‫گ‬Ԩና‫ݛ‬ӄLjᅜ
ऐ੗ᅜइ‫ڥ‬टࡻ‫ڦ‬჋ስႠLjܸ༵ٗߛ‫ܔ‬၎ତ߅ඡ႑ࡽ‫ੇڦ‬
ඓԍइ‫ڥ‬ፌॅሗොၚᆌᅞ዆ႠీLj༵ߛंೕഗ‫ڦ‬ሺᅮăጺ
ඡ‫܈‬ă޿୳հഗཚࡗ཮7໯๖ྔևLCഗॲ೅ದ዁50 Ωă߳୳
༹ܸჾLj֑ᆩ‫گ‬Ԩና้LjAD8344੗༵ࠃ୼ߛ‫ڦ‬ገ࣑ሺᅮă
հഗ‫ڦ‬ೕ୲ၚᆌ༬Ⴀස཮8໯๖ă
304 MHz LOᆯADF4360-8༵ࠃăኄ๟ᅃ߲ण‫ׯ‬କPLL + VCO
‫ೌڇڦ‬঴ਦ‫ݛ‬ӄLjᇑ‫ݴ‬૬๕঴ਦ‫ݛ‬ӄ၎ԲLjሞ‫ׯ‬Ԩࢅ‫ۉ‬ୟ
–10
ӱ੣क़‫ݛ‬௬ਓᆶଆࡻ՗၄ă؊‫ాೌړ‬VCO‫ڦ‬ၿና‫ڦߌۉ‬ଇ
–20
߲ྔև‫ߌۉ‬ยۨዐ႐ೕ୲ăADF4360-8‫ݴֶڦ‬๼‫؜‬ཚࡗә
–30
୿ገ࣑‫܋ڇׯ‬႑ࡽă֑ᆩ304 MHz LO้LjAD8344‫ڦ‬ገ࣑ሺ
–40
ᅮྺ~11dBLjIIP3ࢅSSB NF‫ݴ‬՚ྺ12dBmࢅ8dBă඗ࢫLj70
–50
MHz๼‫؜‬ཚࡗᅃ຺߲঩‫گ‬ཚ୳հഗLjᅜՍᅞ዆LOઍཚၳᆌ
–60
ࢅডߛೕंೕഗሗොă
–70
–80
–90
–100
300
325
350
375
400
425
450
FREQUENCY (MHz)
06147-008
཮8. Sawtek 855898ೕ୲ၚᆌ
AD8344
EVALUATION BOARD
1nF
5V
2.43k
1nF
5V
12
11
10
9
VPDC PWDN EXRB COMM
13
COMM
14
RFCM
COMM
1nF
8
100pF
374MHz
INPUT
IFOP 7
4:1
AD8344
15
RFIN
16
VPMX
1nF
220nH
39pF
240nH
70MHz
IF OUT
18pF
IFOM 6
100pF
5V
1nF
COMM
5
VPLO LOCM LOIN COMM
1
1nF
2
3
1nF
4
VDD
ADF4360-8
EVALUATION BOARD
1nF
ADF4360-8
4.3k
VTUNE
REFIN
CP
CLK
DATA
LE
1.5k
150pF
680nF
390pF
10MHz
XTAL
REF
SPI
CONTROL
BUS
43.8nH
VDD
L1
240nH
1:4
L2
RFOUTA
470
RSET
100pF
4.7k
RFOUTB
06147-009
RESPONSE (dB)
0
཮ 9. ᆯADF4360-8ཚࡗྔև1:4ፆੇԲә୿ൻ‫ڦۯ‬AD8344ᆶᇸंೕഗ
Rev. 0 | Page 5 of 8
AN-851
඗ࢫLj70 MHz IF႑ࡽཚࡗAD8370ຕ੦੗Վሺᅮ‫ٷݣ‬ഗLjም
‫ڦ‬ፕᆩă‫ݴ‬ဆথ๭ऐಇଚ้Ⴔᄲ੊୯ืუՎ࣑ăᆶ࠲ᆩᇀ
ᆯAD9246৊ႜIF֑ᄣăAD8370ਏᆶߛ๼‫؜‬IIP3Ljഄሺᅮۙ
ႚ‫ׯ‬ൻ‫ۯ‬ഗ/ADCথ੨‫ڦ‬ยऺ‫ܠ߸ڦ݆ݛ‬႑တLj൩֖ለ
ব‫ٷྷݔ‬ᇀ40dBăኄ৽ሎႹথ๭ऐ‫ڦ‬ጺ༹ገ࣑ሺᅮ‫ܔ‬प૴
AN-827 “A Resonant Approach to Interfacing Amplifiers to
๼෇‫ۯ‬ༀ‫ྷݔ‬৊ႜۙবࢅႪ߀Ljᅜ๢ᆌՎࣅড‫ڦٷ‬๼෇႑
Switched-Capacitor ADC”(ᅜၿና‫ݛ‬๕ॽ‫ٷݣ‬ഗ૶থ዁ਸ࠲‫ۉ‬
ࡽࠀ୲ă
ඹADC)ă࠲ᇀAD8370तAD9246ྪஏথ੨‫ڦ‬ዷᄲၘ൧ස཮
11໯๖ă཮10‫ܔ‬ADC‫ݠڦ‬ኈ୳հഗၚᆌࢅํ֪ၚᆌ৊ႜକ
ُ‫ت‬჋ስ‫ڦ‬ADCీྺ‫ࡗג‬200 MHz‫ڦ‬IFೕ୲༵ࠃ‫؜‬෥‫ڦ‬࿮ሗ
‫ܔ‬Բă
ො‫ۯ‬ༀ‫ྷݔ‬Ljܸࠀࡼৈྺ~250 mWăߛ‫ٳ‬650 MHz‫ڦ‬ఇె๼
෇‫੻ټ‬ሎႹॽAD9246ᆌᆩᇀ߸ߛ‫ڦ‬IFೕ୲ăሞԨᄇ๖ዐLj
0
჋ᆩ‫ڦ‬๟ᅃ߲֑ᆩ80 MSPS֑ᄣ้ዓ‫ڦ‬70 MHz IFLj޿IFዃ
–5
ᇀADC‫ܾڼ‬లઊຯ༬ೕ୲൶ዐă
–10
ྺକՆ௨ই‫گ‬ADC‫ڦ‬ଳ௺‫܈‬LjՂႷ֑ᆩᅃ߲ੇं۠୳հ
–15
RESPONSE (dB)
MEASURED
ႅ୑‫ڞ‬ዂ‫ڦ‬ADCଳ௺‫ူڦ܈‬ইăଷྔLjੇं۠୳հഗᆶዺ
ᇀᅞ዆ᅺൻ‫ٷݣۯ‬ഗपׂܸิ‫ټ੻ڦ‬ሯำLj‫ޏ‬ሶLjࣷሺे
–20
SIMULATED
–25
–30
ణՔలઊຯ༬ೕ܎ዐ‫ڦ‬ሯำăُ‫ت‬჋ስକྈᇶ‫گ‬ཚॐࠓLj
–35
ᅜሺഽ‫ܔ‬ডߛలઊຯ༬ೕ୲൶‫ڦ‬ഽሗො‫ڦݴׯ‬ᅞ዆ፕᆩă
–40
72 nHೋዃ‫ࢅߌۉ‬ጺ๼෇‫ۉ‬ඹࠌཞࠓ‫ׯ‬ᅃ߲ժ૴ၿናྪஏă
–45
20
ၿናྪஏᆶዺᇀ༵ߛణՔIFೕ୲ူ‫޶ڦ‬ሜፆੇă୳հഗྪ
40
60
80
100
120
140
160
FREQUENCY (MHz)
ஏ༵ࠃ100 Ω዁600 Ω‫ڦ‬ፆੇገ࣑Lj੗ഐ‫ۉॽڟ‬უ༵ߛ~8dB
཮ 10. থ෇AD9246 ADC‫୳۠ंੇڦ‬հഗ‫ݠڦ‬ኈࢅํ֪ၚᆌ
AD9246
VCOM
39pF
SERIAL CONTROL INTERFACE
1nF
1nF
16
15
14
13
12
INLO
ICOM
DATA
CLCK
LTCH
11
10
47nH
56nH
9
VCCO OCOM OPLO
72nH
1:4
AD8370
15pF
22pF
18pF
AD9246-80
72nH
INHI
ICOM
VCCI
1
2
3
PWUP VOCM VCCO OCOM
4
5
6
OPHI
7
8
1nF
1nF
1nF
0.1μF
47nH
56nH
0.1μF
39pF
5V
཮ 11. VGAᇑADCኮक़‫ۉڦ‬ୟথ੨
Rev. 0 | Page 6 of 8
06147-010
70MHz
INPUT
1nF
06147-011
ഗăੇं۠୳հഗᆶዺᇀᅞ዆ডߛೕሗො႑ࡽLjසᅺԨና
AN-851
ྜኝথ๭ऐႠీጺ঳
ሞᄓኤኝ߲থ๭ऐ‫ڦ‬ጺ༹प૴Ⴀీ้LjᆶՂᄲ૧ᆩADIࠅ
৊ႜೠࠚ้࣏ுᆶኍ‫ܔ‬802.16 OFDMհႚ‫ࢇڦ‬๢BER֪๬ย
ິ༵ࠃ‫ߛڦ‬໏ADC FIFO USBೠࠚ༫ॲٗAD9246 ADCዐվ
Ԣă඗ܸLjဃֶ๐ଉ‫(܈ޗ‬EVM)‫ݴ‬ဆඐ੗‫ܔ‬থ๭ऐႠీत
इ֑ᄣຕ਍ă‫ံڦྔܮ‬৊ံ‫(؜‬FIFO)ጱਸ਼؊‫ړ‬ຕ਍࣐؋Lj
੗ᆩ‫ۯ‬ༀ‫ྷݔ‬৊ႜডࡻ‫ࠚڦ‬໙ăྺକ‫ܔ‬OFDM 802.16֪๬႑
ᆩᇀվइADCሞᅃ֑ۨᄣ໏୲ူׂิ‫׊ڦ‬ຕ਍๼‫ز؜‬ăሞ
ࡽ৊ႜEVM‫ݴ‬ဆLjՂႷ๑ᆩᅃ੷કቛ٪‫ئ‬ศ‫܈‬዁ณྺ65 kb
ُए‫إ‬ฉLjFIFOॽվइ‫ڦڟ‬ຕ਍ᅜՔጚUSBথ੨ኧ‫ڦ׼‬ড
‫ڦ‬FIFOਸ਼ăኄᄣ৽੗ᅜվइྜኝ‫ڦ‬RF཭݀ஞ؋ă
‫گ‬໏୲‫د‬ໃ዁ऺ໙ऐăADCೠࠚᆘॲᆯAnalog Devices ADC
Analyzer™෉ॲ৊ႜ੦዆ăADC Analyzer੗‫้ܔ‬ᇘतೕᇘ৊ႜ
‫ݴ‬ဆă૧ᆩADC AnalyzerLj੗ᅜൟ຿վइ‫ڇ‬ᅼࢅມᅼ฿ኈႠ
վइ‫ڦڟ‬ኝຕ๐ଉٗ0‫ڟ‬65,536 (216)փ‫ڪ‬Ljዐक़ኵྺ32,768ă
ጀᅪLjAD9246๟14࿋ADCLjຕ਍๼‫؜‬ጴᅜ16࿋՗๖ăվइ
‫ڦڟ‬ኝຕ๐ଉᆯAgilent‫؜‬೗‫ڦ‬Advanced Design System (ADS)
ీLj঳ࡕ‫ݴ‬՚ස཮12ࢅ཮13໯๖ăጀᅪ཮13ዐ‫ړ‬႑ࡽሺᅮ
2006A৊ႜ‫ت‬૙ăADS‫ײ‬Ⴞᆩ16࿋IF๐ଉ‫أ‬ᅜ4Lj‫ڟڥ‬ᅃ߲
ྺ48dBፑᆸ้‫؜‬၄‫ڦ‬փ૶Ⴤ၄ၡăኄ๟AD8370 VGAٗ‫گ‬ሺ
214ኝຕ՗‫ٳ‬๕ă඗ࢫ‫޿ܔ‬๐ଉ৊ႜገ࣑ժ໫‫ݣ‬ഄና‫ޗ‬Lj
ᅮఇ๕ገ࣑‫ߛׯ‬ሺᅮఇ๕ኮ‫ت‬ăኄዖփ૶Ⴤ၄ၡփࣷ၂ዸ
ᅜิ‫ރׯ‬ኵና‫ྺޗ‬±1 V‫ڦ‬ଭ਩ኵհႚăথူઠᆩᅃ߲૙ၙ‫ڦ‬
IQ঴ۙഗ‫ܔ‬႑ࡽ৊ႜ঴ۙă඗ࢫत้‫ܔ‬IQ๐ଉ৊ႜ؏ൽLj
–50
ᅜิ‫ڪׯ‬ᇀᇱ๔֑ᄣ໏୲¼‫ڦ‬ए‫ټ‬๐ଉă
–55
඗ࢫॽ‫ت‬૙ࡗ‫ڦ‬IQ๐ଉઍ෇Agilent‫؜‬೗‫ڦ‬89600 Vector Signal
–60
Analyzer෉ॲLjܸٗ‫ڟڥ‬EVMႠీă64-QAM OFDM႑ࡽ‫ڦ‬
֪‫ڥ‬EVMႠీࢅ๼෇ࠀ୲ස཮14໯๖LjഄዐLjۙ዆‫ྺ੻ټ‬
–65
10 MHzLjՊஓ୲ྺ¾ăྺՍᇀԲড၎࿋ሯำ‫ڞ‬ዂ‫ڦ‬Ⴀీူই
–70
൧઄Ljኄ૛༵ࠃକࡤᆶࢅփࡤADF4153तADF4360 PLL‫ڦ‬ଇ
HD2
–75
ዖEVMፖՔ཮ă
HD3
–80
0
–85
–5
35
40
45
50
55
60
65
SIGNAL GAIN (dB)
06147-012
–90
30
–10
–15
0
7
–5
6
EVM (dB)
཮ 12. ྜኝথ๭ऐप૴‫ܾڦ‬঩तෙ঩ၿհ฿ኈ
(ሞAD9246๼෇‫܋‬ᅜ−1dBFS๼෇‫ۉ‬ೝ֪‫)ڥ‬
–20
–25
–30
–35
WITH ADF4153 AND
ADF4360-8 PLLs
5
–15
4
–20
3
–25
2
–30
1
–35
30
35
40
45
50
55
60
65
0
70
SIGNAL GAIN (dB)
–45
SSB NF (dB)
–10
–50
–80
USING EXTERNAL GENERATORS FOR LO SIGNALS
–70
–60
–50
–40
–30
–20
INPUT POWER (dBm)
཮ 14. ཚࡗኝ߲থ๭ऐ‫ܔ‬64-QAM ¾Պஓ୲Ă
10 MHz OFDM႑ࡽ֪‫ڦڥ‬EVMႠీ
06147-013
IIP3 (dBm)
–40
཮ 13. ྜኝথ๭ऐप૴‫ڥ֪ڦ‬ມᅼIIP3ࢅ‫ڇ‬Չ‫ټ‬NF
ᇑথ๭ऐገ࣑ሺᅮ‫࠲ڦ‬ဣ
Rev. 0 | Page 7 of 8
–10
06147-014
HARMONIC DISTORTION (dBc)
ই‫گ‬ኝ߲থ๭ऐ‫ڦ‬BERႠీă
AN-851
ྺକൽ‫ڥ‬থ๭ऐ‫ڦ‬჋ስႠLjՂႷ֪ଉ֑ᆩ‫ڇ‬ᅼ๼෇‫ܔ‬ᅃۨ
ྜ ኝ থ ๭ ऐ ‫ ۆ ڦ‬႙ ೕ ೷ ༬ Ⴀ ස ཮ 16໯ ๖ ă ཚ ࡗ ADC
๼෇ೕ୲‫ྷݔ‬෢ೕ‫ڦ‬၎‫ܔ‬ၚᆌă཮15՗๖ኝ߲থ๭ऐሞඍ
Analyzer෉ॲLj੗‫ݛ‬Ս‫ڟੂں‬ຨༀೕ೷ժվइ‫้ڟ‬ᇘຕ
ณമ‫܋‬ೕ܎჋ስ୳հഗ้‫ڦ‬჋ስႠăມူՎೕথ๭ऐ‫ڦ‬ೕ
਍Ljࠃࢫ೺႑ࡽ‫ت‬૙๑ᆩă৑࠶IF႑ࡽྺ70 MHzLj֑ᄣ้
୲჋ስ༬Ⴀ੗‫ټ‬ઠटߛ‫ڦ‬၎ତ߅ඡᇸੇඡ‫܈‬ăेฉമ‫܋‬ೕ
ዓྺ80 MSPSLjඐ՗၄ྺ‫ڼ‬ᅃలઊຯ༬ೕ୲൶‫ڦ‬10 MHz႑
܎჋ስ୳հഗࢫLj੗ሞ၎ତRFೕ܎इ‫ߛڥ‬ᇀ60dB‫ڦ‬ᅞ዆Ⴀ
ࡽă঺ዺADC Analyzer෉ॲLj੗ᅜ੺໏‫ݴ‬ဆࢅۙ๬ሗො้
ీă
ዓࢅLO႑ࡽ‫ݴ‬ଉLj‫ޏ‬ሶ੗ీᆖၚথ๭ऐ‫ాټڦ‬Ⴀీă‫߲ܠ‬
IF୳հഗपᅜतLO୳հഗᆶዺᇀॽሗොই‫گ‬዁੗ࢮ୼փऺ
10
‫ڦ‬຤ೝăጀᅪ32 MHz‫ڦت‬ෑሗොăኄ๟‫ڼ‬ᅃ߲ंೕഗ‫ڦ‬LO
NORMALIZED RESPONSE (dB)
0
዁IFႅ୑ă
–10
՗3ඇ௬ጺ঳କথ๭ऐ‫ڦ‬Ⴀీăኄዖยऺྺߛᇀ−74dBm‫ڦ‬
–20
๼෇႑ࡽ༵ࠃକᆫᇀ−25dB EVM‫ڦ‬ႠీLj৥ၟᅞ዆Ⴀీ‫ࡗג‬
–30
60dBLjժਏᆶ‫؜‬෥‫ڦ‬၎ତࢅ‫ݥ‬၎ତཚ‫ڢ‬ᅞ዆ీ૰ă
–40
՗3. Ⴀీጺ঳(ᆩ64-QAM ¾Պஓ୲OFDM10 MHz
‫੻ټ‬๼෇႑ࡽ֪‫)ڥ‬
–50
–70
2280
2300
2320
2340
2360
2380
2400
2420
2440
RF INPUT FREQUENCY (MHz)
06147-015
–60
཮ 15. থ๭ऐ჋ስႠᇑ๼෇ೕ୲‫࠲ڦ‬ဣLjഄዐLjԨናۙবྺ2350 MHz
๼෇႑ࡽ(fLO1 = 1976 MHz, fLO2 = 304 MHz)
–20
SPECTRAL MAGNITUDE (dBm)
–30
–40
֖ຕ
ሺᅮ‫ྷݔ‬
EVM(ٗ−74dBm዁−20dBm๼෇ࠀ୲)
ዐक़ሺᅮIIP3(ೝ਩= 48dB)
ዐक़ሺᅮNF(ೝ਩= 48dB)
৥ၟᅞ዆
၎ତཚ‫ڢ‬ᅞ዆
ࠀࡼ(ٗLNA዁ADCLjࡤPLL)
֪‫ڦڥ‬Ⴀీຕ਍
30 dB዁67 dB
<−25 dB
>−8 dBm
<4 dB
>60 dB
>58 dB
~2.2 Watts
–50
–60
֖੊࿔၅
–70
Newman, Eric and Reeder, Rob. 2006. “A Resonant Approach to
Interfacing Amplifiers to Switched-Capacitor ADCs.”
Application Note AN-827. Analog Devices, Inc. (January)
–80
–90
–100
–110
–130
0
5
10
15
20
25
30
35
FREQUENCY (MHz)
40
06147-016
–120
IEEE Std 802.16-2004. IEEE Standard for Local and
Metropolitan Area Networks - Part 16: Air Interface for Fixed
Broadband Wireless Access Systems. Institute of Electrical and
Electronics Engineers, Inc. (June).
཮ 16. ADCೕ೷ሞዐक़ሺᅮူ‫ڦ‬FFTፖՔ཮Lj
๼෇ྺ64-QAMLj¾Պஓ୲Lj10 MHz‫੻ټ‬OFDMLj
ೕ୲ྺ2.342 GHz)ጀᅪLj໚඗႑ࡽ՗၄ྺ10 MHz IFLj
‫ํڍ‬ा๟ገ࣑ഗ‫ܾڼ‬లઊຯ༬ೕ୲൶ዐ‫ڦ‬70 MHz๼෇႑ࡽă*
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
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