ۉڇᇸĂֶݴ18࿋
ADCൻۯഗ
ADA4941-1
ۉڇᇸຕ֑णဣཥ
ᅏഗᅏ
ࡗײ੦
ۉࠃۉဣཥ
ᅅଐᅏഗ
1
8
IN
REF
2
7
DIS
V+
3
6
V–
OUT+
4
5
OUT–
1
–65
–70
–75
VO = 6V p-p
–80
–85
–90
–95
–100
–105
–110
VO = 2V p-p
–115
–120
HD2
HD3
–125
–130
–135
–140
0.1
HD3
HD2
1
10
100
FREQUENCY (kHz)
1000
05704-045
ᆌᆩ
FB
–60
DISTORTION (dBc)
܋ڇገֶݴገ࣑ഗ
ڦ၍Ⴀ܈
! ฿ኈǖ−110 dBc(100 KHzLjVOdm = 2 Vރރኵ)
گሯำǖ10.2 nV/√Hz(ችࢇڟ܋LjG = 2)
टࡼࠀگǖ2.2 mA(3 Vۉᇸ)
ߛፆੇǖ24 MΩ
ᆩࢽۙሺᅮ
ߛǖ−3 dBྺټ31 MHz (G = +2)
0.005%ॺ૬้क़ǖ300 nsDŽ2 VօDž
گ฿ۙǖ0.8 mV(ፌٷኵ)(ችࢇڟ܋LjG = 2)
ࡆࡆڟ
্ᆩ༬Ⴀ
ۉᇸۉუྷݔǖ2.7 V12 V
֑ᆩবูक़ڦ3 mm x 3 mm LFCSPހጎ
05704-001
ࠀీ
༬Ⴀ
2. փཞူ܈ޗ฿ኈᇑೕ୲࠲ڦဣ
߁ຎ
ADA4941-1ᅃࡼࠀگĂگሯำֶݴൻۯഗLjᆩᇀൻۯ
ࠀࡼ௺ߌဣཥዐፌߛ18࿋ڦADCă֑ᆩᅟᇀ๑ᆩ܋ڇڦ
ገֶݴದዃLjႴྔևᇮॲ৽ీइڥሺᅮྺ2ሺेۉፆݒ
ઍྪஏՍํ၄ٷᇀ2ڦሺᅮLjཞ้༵ࠃൻݴߛۯՐ୲
ADCႴگڦ฿ኈࢅߛ႑ሯԲ(SNR)ڪዘᄲ༬Ⴀă
ADA4941-1ਏᆶۉუ֑(ݔᆩ5 Vۉڇᇸ้0 V3.9 V)Ă
ࡆࡆڟĂߛፆੇࢅᆩࢽۙሺᅮLjᆩᇀൻۯԈ
ઔۉࠃۉยԢࢅۉڇᇸຕ֑णဣཥ߳ڪዖࡼࠀگᆌᆩ
ዐۉڇڦᇸĂֶݴADCă
ADA4941-1ݥࢇൻۯAD7687ĂAD7690ࢅAD7691ڪ16
࿋ࢅ18࿋PulSAR® ADCă
ADA4941-1֑ᆩADIࠅິڦጆᆶپܾڼXFCB߾ᅝሰLj๑
ٷݣഗᅜሞۉگᇸୁۉཉॲူํ၄18࿋Ⴀీă
AD4941-1༵ࠃ8ᆅগၭ႙LFCSPހጎࢅ8ᆅগՔጚSOICހ
ጎLj߾ۨܮፕ࿒ྺྷݔ܈−40°C+125°Cકቛ߾ᄽ࿒ݔ܈
ྷă
Rev. B
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.
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Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2010 Analog Devices, Inc. All rights reserved.
ADIዐ࿔Ӳຕ֩ᆈ࿔Ӳຕ֩ڦᅳ࿔Lj൩ଌᅳዐీ٪ሞڦᇕჾፇኯईᅳٱဃLjADIփܔᅳዐ٪ሞֶڦᅴईᆯׂُิٱڦဃሴăසႴඓණඪࢆَᇕڦጚඓႠLj൩֖ADI༵ࠃ
ڦፌႎᆈ࿔Ӳຕ֩ă
ADA4941-1
ణ
༬Ⴀ ................................................................................................... 1
!
ۉუሯำ ....................................................................... 17
ᆌᆩ ................................................................................................... 1
!
ೕ୲ၚᆌᇑԿ࣍ሺᅮ .......................................................... 19
ࠀీ ........................................................................................... 1
ᆌᆩ ................................................................................................. 20
߁ຎ ................................................................................................... 1
!
߁ຎ ......................................................................................... 20
Ⴊ۩૦๏ ........................................................................................... 2
!
๑ᆩREFᆅগ ........................................................................ 20
रຍࡀ߭ ........................................................................................... 3
!
ాևݒઍྪஏࠀࡼ .............................................................. 20
ਨܔፌۨܮٷኵ ............................................................................. 6
!
্ᆩ༬Ⴀ ................................................................................ 20
!
ඤፆ ........................................................................................... 6
!
ཁे3टۅSallen-Key୳հഗ .............................................. 21
ESDয়ߢ ................................................................................... 6
!
ൻۯAD7687 ADC ................................................................ 22
ᆅগದዃࢅࠀీ௮ຎ ..................................................................... 7
−2ሺᅮದዃ ........................................................................... 22
ۆ႙߾ፕ༬Ⴀ .................................................................................. 8
ྔႚ٫ ........................................................................................ 23
߾ፕᇱ ........................................................................................ 15
!
!
एԨ߾ፕᇱ ....................................................................... 26
!
ୁဃֶऺ໙ ....................................................................... 16
Ⴊ۩૦๏
20093ሆ—Ⴊ۩Ӳ0Ⴊ۩ӲA
߸߀ሺᅮဃֶᅎ֖ຕ)1* ....................................................... 3
߸߀ሺᅮဃֶᅎ֖ຕ)2* ....................................................... 4
߸߀ሺᅮဃֶᅎ֖ຕ)3* ....................................................... 5
߸ႎྔႚ٫ ................................................................................ 23
20064ሆ—Ⴊ۩Ӳ0ǖ؛๔Ӳ
Rev. B | Page 2 of 24
۩ࠔኸళ ................................................................................ 23
ADA4941-1
रຍࡀ߭!
ݥأଷᆶຫLjTA = 25°CLjVS = 3 VLjOUT+থFB (G = 2)LjRL, dm = 1 kΩLjREF = 1.5 Vă
1
֖ຕ
ۯༀႠీ
-3 dBټ
! ࡗൻ࣬ް้क़
! უӦ୲
0.005%ॺ૬้क़
ሯำ/฿ኈႠీ
ၿհ฿ኈ
RTOۉუሯำ
ୁۉሯำ
ୁႠీ!
! ֶݴ฿ۙۉუ!
! ֶݴ฿ۙۉუᅎ!
! ܋ڇ฿ۙۉუ!
! ܋ڇ฿ۙۉუᅎ!
! ೋዃ!ୁۉ
! ฿ۙ!ୁۉ
! ሺᅮ!
! ሺᅮဃֶ!
! ሺᅮဃֶᅎ!
༬Ⴀ
ۉፆ
ۉඹ
ࠌఇۉუྷݔ
ࠌఇᅞԲ(CMRR)
༬Ⴀ!
! ۉუӦ!ޗ
! !ୁۉ
! ඹႠሜൻ!ۯ
ۉᇸ
! ߾ፕྷݔ
! ৢༀୁۉ
! ৢༀ্—ୁۉᆩ
! ۉᇸᅞԲ(PSRR)
+PSRR
−PSRR
্ᆩDŽਸ࠲ࠀీDž
DISۉუ
DISୁۉ
ཉॲ!
ፌၭኵ! ۆ႙ኵ!
VO = 0.1 Vރރኵ
VO = 2.0 Vރރኵ
+࣬ް/−࣬ް
VO = 2 Vօ
VO = 2 Vރރኵօ
21
4.6
fC = 40 kHz, VO = 2 Vރރኵ, HD2/HD3
fC = 100 kHz, VO = 2 Vރރኵ, HD2/HD3
fC = 1 MHz, VO = 2 Vރރኵ, HD2/HD3
f = 100 kHz
f = 100 kHz
ٷݣഗA1ईٷݣഗA2
INࢅREF
INࢅREF
(+OUT − −OUT)/(IN − REF)
1.98
−1
30
6.5
320/650
22
300
MHz
MHz
ns
V/μs
ns
−116/−112
−101/−98
−75/−71
10.2
1.6
dBc
dBc
dBc
nV/√Hz
pA/√Hz
0.2
1.0
0.1
0.3
3
0.1
2.00
1
INࢅREF
INࢅREF
ፌٷኵ! ڇ࿋
0.8
0.4
4.5
2.01
+1
5
24
1.4
CMRR = VOS, dm/VCM, VREF = VIN, VCM= 0.2 V1.9 V, G = 4
0.2
81
߳܋ڇLjG = 4
±2.90
20%ࡗ؋LjVO, dm = 200 mVރރኵ
105
MΩ
pF
V
dB
±2.95
25
20
V
mA
pF
1.9
2.7
2.2
10
PSRR = VOS, dm/ΔV S, G = 4
্ᆩLjDIS = ߛ
๑ీLjDIS = گ
্ᆩLjDIS = ߛ
๑ీLjDIS = گ
ਸഔ้क़
࠲Կ้क़
Rev. B | Page 3 of 24
86
86
mV
μV/°C
mV
μV/°C
μA
μA
V/V
%
ppm
12
2.4
16
V
mA
μA
100
110
dB
dB
≥1.5
≤1.0
5.5
4
0.7
30
V
V
μA
μA
μs
μs
8
6
ADA4941-1
ݥأଷᆶຫLjTA = 25°CLjVS = 5 VLjOUT+থFB (G = 2)LjRL, dm = 1 kΩLjREF = 2.5 Vă
Table 2.
֖ຕ
ۯༀႠీ
-3 dBټ
! ࡗൻ࣬ް้क़
! უӦ୲
0.005%ॺ૬้क़
ሯำ/฿ኈႠీ
! ၿհ฿ኈ
RTOۉუሯำ
! ୁۉሯำ
ୁႠీ
! ֶݴ฿ۙۉუ
! ֶݴ฿ۙۉუᅎ
! ܋ڇ฿ۙۉუ
! ܋ڇ฿ۙۉუᅎ
! ೋዃୁۉ
! ฿ۙୁۉ
! ሺᅮ
! ሺᅮဃֶ
! ሺᅮဃֶᅎ
༬Ⴀ
! ۉፆ
! ۉඹ
! ࠌఇۉუྷݔ
! ࠌఇᅞԲ(CMRR)
༬Ⴀ
! ۉუӦޗ
! ୁۉ
! ඹႠሜൻۯ
ۉᇸ
߾ፕྷݔ
ৢༀୁۉ
ৢༀ্—ୁۉᆩ
ۉᇸᅞԲ(PSRR)
+PSRR
-PSRR
্ᆩDŽਸ࠲ࠀీDž
DISۉუ
DISୁۉ
ཉॲ!
ፌၭኵ! ۆ႙ኵ!
VO = 0.1 Vރރኵ
VO = 2.0 Vރރኵ
+࣬ް/-࣬ް
VO = 2 Vօ
VO = 6 Vރރኵօ
22
4.9
fC = 40 MHz, VO = 2 Vރރኵ, HD2/HD3
fC = 100 MHz, VO = 2 Vރރኵ, HD2/HD3
fC = 1 MHz, VO = 2 Vރރኵ, HD2/HD3
f = 100 kHz
f = 100 kHz
ٷݣഗA1ईٷݣഗA2
INࢅREF
INࢅREF
(+OUT - -OUT)/(IN - REF)
1.98
−1
31
7
200/600
24.5
610
MHz
MHz
ns
V/μs
ns
−118/−119
−110/−112
−83/−73
10.2
1.6
dBc
dBc
dBc
nV/√Hz
pA/√Hz
0.2
1.0
0.1
0.3
3
0.1
2
1
INࢅREF
INࢅREF
ፌٷኵ! ڇ࿋
0.8
0.4
4.5
2.01
+1
5
24
1.4
CMRR = VOS, dm/VCM, VREF = VIN,VCM = 0.2 V3.9 V, G = 4
0.2
84
߳܋ڇLjG = 4
±4.85
20%ࡗ؋LjVO, dm = 200 mVރރኵ
106
MΩ
pF
V
dB
±4.93
25
20
V
mA
pF
3.9
2.7
2.3
12
PSRR = VOS, dm/ΔV S, G = 4
্ᆩLjDIS = ߛ
๑ీLjDIS = گ
্ᆩLjDIS = ߛ
๑ీLjDIS = گ
ਸഔ้क़
࠲Կ้क़
Rev. B | Page 4 of 24
87
87
mV
μV/°C
mV
μV/°C
μA
μA
V/V
%
ppm
12
2.6
20
V
mA
μA
100
110
dB
dB
≥1.5
≤1.0
5.5
4
0.7
30
V
V
μA
μA
μs
μs
8
6
ADA4941-1
ݥأଷᆶຫLjTA = 25°CLjVS = ±5 VLjOUT+থFB (G = 2)LjRL, dm = 1 kΩLjREF = 0 Vă
3
֖ຕ
ۯༀႠీ
-3 dBټ
! ࡗൻ࣬ް้क़
! უӦ୲
0.005%ॺ૬้क़
ሯำ/฿ኈႠీ
! ၿհ฿ኈ
RTOۉუሯำ
! ୁۉሯำ
ୁႠీ!
! ֶݴ฿ۙۉუ!
! ֶݴ฿ۙۉუᅎ!
! ܋ڇ฿ۙۉუ!
! ܋ڇ฿ۙۉუᅎ!
! ೋዃ!ୁۉ
! ฿ۙ!ୁۉ
! ሺᅮ!
! ሺᅮဃֶ!
! ሺᅮဃֶᅎ!
༬Ⴀ
! ۉፆ
! ۉඹ
! ࠌఇۉუྷݔ
! ࠌఇᅞԲ(CMRR)
༬Ⴀ!
! ۉუӦ!ޗ
! !ୁۉ
! ඹႠሜൻ!ۯ
ۉᇸ
! ߾ፕྷݔ
! ৢༀୁۉ
! ৢༀ্—ୁۉᆩ
! ۉᇸᅞԲ(PSRR)
+PSRR
−PSRR
্ᆩDŽਸ࠲ࠀీDž
DISۉუ
DISୁۉ
ཉॲ!
ፌၭኵ!
ۆ႙ኵ!
ፌٷኵ! ڇ࿋
VO = 0.1 Vރރኵ
VO = 2.0 Vރރኵ
+࣬ް/−࣬ް
VO = 2 Vօ
VO = 12 Vރރኵօ
23
5.2
32
7.5
200/650
26
980
MHz
MHz
ns
V/μs
ns
−118/−119
−109/−112
−84/−75
10.2
1.6
dBc
dBc
dBc
nV/√Hz
pA/√Hz
fC = 40 kHz, VO = 2 Vރރኵ, HD2/HD3
fC = 100 kHz, VO = 2 Vރރኵ, HD2/HD3
fC = 1 MHz, VO = 2 Vރރኵ, HD2/HD3
f = 100 kHz
f = 100 kHz
ٷݣഗA1ईٷݣഗA2
INࢅREF
INࢅREF
(+OUT − −OUT)/(IN − REF)
1.98
−1
0.2
1.0
0.1
0.3
3
0.1
2
1
INࢅREF
INࢅREF
0.8
0.4
4.5
2.01
+1
5
24
1.4
CMRR = VOS, dm/VCM, VREF = VIN,
VCM= -4.8 V+3.9 V, G = 4
߳܋ڇLjG = 4
−4.8
85
VS − 0.25
20%ࡗ؋LjVO, dm = 200 mVރރኵ
105
MΩ
pF
V
dB
VS ± 0.14
25
20
V
mA
pF
+3.9
2.7
2.5
15
PSRR = VOS, dm/ΔV S, G = 4
্ᆩLjDIS = ߛ
๑ీLjDIS = گ
্ᆩLjDIS = ߛ
๑ీLjDIS = گ
ਸഔ้क़
࠲Կ้क़
Rev. B | Page 5 of 24
87
87
mV
μV/°C
mV
μV/°C
μA
μA
V/V
%
ppm
12
2.7
26
V
mA
μA
100
110
dB
dB
≥ −3
≤ −4
7
4
0.7
30
V
V
μA
μA
μs
μs
10
6
ADA4941-1
ਨܔፌۨܮٷኵ
4
֖ຕ
ۨܮኵ
ۉᇸۉუ
ࠀࡼ
٪ئ࿒ྷݔ܈
߾ፕ࿒ྷݔ܈
ᆅগ࿒ࡰ(܈থ10௱)
࿒
12 V
९3
−65°C+125°C
−40°C+85°C
300°C
150°C
ጀᅪLjגฉຎਨܔፌۨܮٷኵీࣷڞዂഗॲᆦ৳Ⴀ
࣋ăኄኻۨܮፌኵLjփภतഗॲሞኄၵईඪࢆഄཉॲ
ူגԨरຍࡀ߭ኸՔీࠀڦႠ֡ፕăሞਨܔፌܮٷ
ۨኵཉॲူ߾ፕࣷᆖၚഗॲڦ੍Ⴀă
ඤፆ
θJAኍܔፌֶཉॲLjनଭഘୁ้ഗॲࡰথሞۉୟӱฉ)नഄ
ࡰಎࡰথڟPCB௬ฉࡰڦಎ)ැᆩ*LjഄዐPCBথ੨ᇑཟ
֫ඤ၎ă
ހጎ(ࡼࠀڦPD)ྺৢༀࠀࡼᇑހጎዐᆶڦሜൻۯ
ڞዂࡼࠀڦኮࢅLjܸৢༀࠀࡼሶྺۉᇸᆅগኮक़ۉڦუ
(VS)ױᅜৢༀ(ୁۉIS)ăሜൻۯڞዂࡼࠀڦൽਦᇀਏ༹
ᆌᆩăܔᇀ߳Ljሜൻۯڞዂڪࡼࠀڦᇀሜୁۉ
ױᅜഗॲాڦ၎࠲უইăᆶሜڪࡼࠀڦᇀ߳ሜࠀࡼ
ڦጺࢅăฉຎऺ໙ዐՂႷ๑ᆩRMSۉუࢅୁۉă
ഘୁሺഽොඤLjܸٗᆶၳইگθJAăُྔLj߸ূܠຌথ
ᇑূຌጽ၍ހڦጎᆅগĂཚĂۉࢅںᇸ֫থةLjኄཞᄣ
ইگθJAăހጎڹևࡰڦಎՂႷࡰথڟᇑཟ֫ඤ၎
ڦPCBথ੨ฉࡰڦಎLjܸٗํ၄ኸۨڦθJAă
3၂๖ሞJEDECՔጚ4֫ӱฉLj8ᆅগSOIC(126°C/W)ࢅ8
ᆅগLFCSP(83°C/W)ଇዖހጎڦፌٷҾඇࠀࡼᇑ࣍ৣ࿒܈
࠲ڦဣăLFCSPڹڦևࡰಎՂႷࡰথڟᇑPCB֫ඤ၎ڦ
ࡰಎăθJAኵྺৎຼኵă
2.5
θJA
126
83
θJC
28
19
ڇ࿋
qC/W
qC/W
ፌ!ࡼࠀٷ
ADA4941-1ހጎాڦፌٷҾඇࠀࡼ၌ᇀ၎ᆌڦႊೌ࿒
)TJ*ߛืڦ൧ăڟٳի૱ࣅገՎ࿒܈150°Cፑᆸ้Lj໒ଙ
ڦ༬Ⴀࣷ݀ิ߀Վăन๑ኻሡ้ࡗגኄᅃ࿒܈၌ኵᄺᆶ
ీ߀Վހጎܔႊೌፕᆩڦᆌ૰Ljܸٗᆦ৳ႠںገՎ
ADA4941-1֖ڦຕႠీă้क़ࡗג150°Cڦ࿒ࣷڞዂႊ
ೌഗॲ၄ՎࣅLjᅺܸీሰࠤׯቱă
2.0
LFCSP
1.5
1.0
SOIC
0.5
0
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
3. 4֫ӱፌࡼࠀٷᇑ࿒࠲ڦ܈ဣ
ESDয়ߢ!
ESD(ৢߌ௺)ۉݣۉഗॲăৢࢁۉۉඹᅟሞට༹ࢅ֪ยԢฉેओLjߛٳ4000 VLjժీሞுᆶִ
ਥڦ൧ူۉݣă࠶ԨׂਏᆶጆᆩESDԍࢺۉୟLjڍሞᇜీߛڟଉৢ้ۉݣۉLjీࣷ݀ิᆦ৳
Ⴀഗॲ࣋ăᅺُLjॺᅱ֑ൽڦړESDٯݔݞแLjᅜՆ௨ഗॲႠీူইईࠀీෟ฿ă
Rev. B | Page 6 of 24
100
120
05704-002
ހጎૌ႙!
8-Lead SOIC on 4-Layer Board
8-Lead LFCSP with EP on 4-Layer Board
MAXIMUM POWER DISSIPATION (W)
5. ඤፆ
ADA4941-1
FB
1
8
IN
REF
2
7
DIS
V+
3
6
V–
OUT+
4
5
OUT–
05704-101
ᆅগದዃࢅࠀీ௮ຎ!
NOTES
1. THE EXPOSED PAD IS NOT ELECTRICALLY CONNECTED TO THE DEVICE.
IT IS TYPICALLY SOLDERED TO GROUND OR A POWER PLANE ON THE PCB
THAT IS THERMALLY CONDUCTIVE.
4.ᆅগದዃ
6. ᆅগࠀీ௮ຎ
ᆅগՊࡽ!
1
2
3
4
5
6
7
8
ᆅগఁ!
FB
REF
V+
OUT+
OUT−
V−
DIS
IN
௮ຎ!
ݒઍ
एጚۉუ
ኟۉᇸ!
ཞ၎
ݒ၎
ۉᇸ
্ᆩ
!
Rev. B | Page 7 of 24
ADA4941-1
ۆ႙߾ፕ༬Ⴀ!
VS = +5V
VS = ±5V
10
1000
100
FREQUENCY (MHz)
NORMALIZED CLOSED-LOOP GAIN (dB)
+25°C
–40°C
1000
100
FREQUENCY (MHz)
05704-005
NORMALIZED CLOSED-LOOP GAIN (dB)
+85°C
10
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
0.1
NORMALIZED CLOSED-LOOP GAIN (dB)
RL, dm = 5kΩ
10
100
FREQUENCY (MHz)
1000
05704-006
NORMALIZED CLOSED-LOOP GAIN (dB)
RL, dm = 1kΩ
1
VO, dm = 6V p-p
+85°C
–40°C
+25°C
1
100
10
9. փཞ࿒ٷڦူ܈႑ࡽೕ୲ၚᆌ
VO, dm = 0.1V p-p
RL, dm = 500Ω
100
10
FREQUENCY (MHz)
6. փཞ࿒ڦူ܈ၭ႑ࡽೕ୲ၚᆌ
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
1
8. փཞۉᇸူٷڦ႑ࡽೕ୲ၚᆌ
VO, dm = 0.1V p-p
1
VS = +5V
VO, dm = 6V p-p
FREQUENCY (MHz)
5. փཞۉᇸူڦၭ႑ࡽೕ୲ၚᆌ
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
VS = ±5V
VO, dm = 12V p-p
05704-008
1
VS = +3V
VO, dm = 2V p-p
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
0.1
VO, dm = 6V p-p
RL, dm = 1kΩ
RL, dm = 500Ω
RL, dm = 5kΩ
1
FREQUENCY (MHz)
10. փཞፆႠሜူٷڦ႑ࡽೕ୲ၚᆌ
7. փཞፆႠሜူڦၭ႑ࡽೕ୲ၚᆌ
Rev. B | Page 8 of 24
10
05704-009
VS = +3V
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
0.1
05704-007
VO, dm = 0.1V p-p
NORMALIZED CLOSED-LOOP GAIN (dB)
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
05704-004
NORMALIZED CLOSED-LOOP GAIN (dB)
ݥأଷᆶຫLjVS = 5 VLjRL, dm = 1 kΩLjREF = 2.5 VLjDIS = LOWLjOUT+থথڟFB (G = 2)LjTA = 25°Că
ADA4941-1
G = +2
G = +10
1
G = –2
100
10
FREQUENCY (MHz)
G = +4
G = +2
G = –2
G = +10
1
NORMALIZED GAIN (dB)
CL = 0pF
100
1000
FREQUENCY (MHz)
05704-011
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
0.1
VO, dm = 2V p-p
VO, dm = 6V p-p
1
1000
100
15. փཞڦူ܈ޗೕ୲ၚᆌ
–70
VREF = 0.05V p-p
VO, dm = 2V p-p
VREF = MIDSUPPLY
–80
DISTORTION (dBc)
VS = ±5V
–90
–100
HD3
–110
–120
VS = +3V
RL = 2kΩ
–130
VS = +5V
1
10
FREQUENCY (MHz)
RL = 1kΩ
HD2
1000
05704-012
NORMALIZED CLOSED-LOOP GAIN (dB)
10
FREQUENCY (MHz)
12. փཞඹႠሜူڦၭ႑ࡽೕ୲ၚᆌ
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
VO, dm = 0.1V p-p
13. փཞۉᇸူڦREFၭ႑ࡽೕ୲ၚᆌ
–140
0.1
RL = 500Ω
HD2
1
10
100
FREQUENCY (kHz)
16. փཞሜူ฿ኈᇑೕ୲࠲ڦဣ
Rev. B | Page 9 of 24
1000
05704-015
NORMALIZED CLOSED-LOOP GAIN (dB)
14. փཞሺᅮူٷڦ႑ࡽೕ୲ၚᆌ
CL = 20pF
10
1000
FREQUENCY (MHz)
VO, dm = 0.1V p-p
1
100
10
11. փཞሺᅮူڦၭ႑ࡽೕ୲ၚᆌ
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
VO, dm = 2V p-p
05704-014
G = +4
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
05704-013
VO, dm = 0.1V p-p
NORMALIZED CLOSED-LOOP GAIN (dB)
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
–14
–15
–16
05704-010
NORMALIZED CLOSED-LOOP GAIN (dB)
ADA4941-1
–65
–65
f = 10kHz
VS = ±5V
–85
DISTORTION (dBc)
VS = +5V
–95
HD3
–115
HD3
HD2
2
4
6
8
10
12
14
16
18
20
–145
0
4
6
8
10
12
14
16
20
18
20. փཞۉᇸူ฿ኈᇑ࠲ڦ܈ޗဣ(G = -2)
–70
VO, dm = 2V p-p
VREF = MIDSUPPLY
VO, dm = 2V p-p
VREF = MIDSUPPLY
–80
DISTORTION (dBc)
–85
–90
–90
–100
–105
–110
HD2
–115
–120
HD3
–125
–130
HD2
–110
HD2
–120
HD2
HD3
VS = +3V
HD3
–135
–140
0.1
1
VS = ±5V
10
1000
100
FREQUENCY (kHz)
G = +2
–140
0.1
0.12
1
10
1000
100
CL = 0pF
VOUT = 200mV p-p
0.08
OUTPUT VOLTAGE (V)
VO = 6V p-p
–80
–85
–90
–95
–100
–105
–110
CL = 20pF
0.04
0
–0.04
VO = 2V p-p
HD2
HD3
–125
–130
HD3
HD2
1
10
100
FREQUENCY (kHz)
1000
19. փཞူ܈ޗ฿ኈᇑೕ୲࠲ڦဣ
–0.12
50ns/DIV
22. փཞඹႠሜူڦၭ႑ࡽຨༀၚᆌ
Rev. B | Page 10 of 24
05704-022
–0.08
05704-045
–135
–140
0.1
G = +4
HD3
21. փཞሺᅮူ฿ኈᇑೕ୲࠲ڦဣ
–60
–115
–120
HD3
FREQUENCY (kHz)
18. փཞۉᇸူ฿ኈᇑೕ୲࠲ڦဣ
–65
–70
–75
G = –2
–130
VS = +5V
05704-020
–95
–100
05704-017
DISTORTION (dBc)
2
OUTPUT AMPLITUDE (V p-p)
–75
–80
DISTORTION (dBc)
HD3
HD2
17. փཞۉᇸူ฿ኈᇑ࠲ڦ܈ޗဣ(G = +2)
–60
VS = ±5V
HD3
HD3
–115
–135
OUTPUT AMPLITUDE (V p-p)
–65
–70
VS = +5V
HD2
HD3
0
VS = +3V
–105
–125
HD2
–125
–95
05704-019
–105
05704-016
DISTORTION (dBc)
VS = +3V
–85
–135
DIFFERENTIAL G = –2
f = 10kHz
–75
–75
ADA4941-1
0.12
VS = +3V
8
VOUT = 200mV p-p
0.08
VS = +5V OR VS = ±5V
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
VS = ±5V
VO, dm = 12V p-p
6
0.04
0
–0.04
VS = ±2.5V
VO, dm = 6V p-p
4
2
VS = ±1.5V
VO, dm = 2V p-p
0
–2
–4
–0.08
23. փཞۉᇸူڦၭ႑ࡽຨༀၚᆌ
8
1.2
0.6
0
0
–2
–0.6
2 × VIN
–1.2
–6
7
ERROR = 2 × VIN – VO, dm
6
0
VO, dm
4
10
–0.9
–1.2
1
27. ॺ૬้क़(0.005%)LjVS = +5 V
8
INPUT × 2
6
8
OUTPUT
OUTPUT VOLTAGE (V)
6
–0.6
1μs/DIV
24. ॺ૬้क़(0.005%)LjVS = ±5 V
12
–0.3
2 × VIN
2
–2.4
0.6
0.3
5
3
–1.8
1μs/DIV
–8
0.9
VS = +5V
VO, dm = 6V p-p
4
2
0
–2
–4
INPUT × 2
4
2
OUTPUT
0
–2
–4
–6
–8
1μs/DIV
–12
05704-024
–6
–10
1μs/DIV
–8
25. ࡗൻ࣬ްLjVS = ±5 V
28. ࡗൻ࣬ްLjVS = +5 V
Rev. B | Page 11 of 24
05704-027
–4
OUTPUT VOLTAGE (V)
AMPLITUDE (V)
ERROR = 2 × VIN – VO, dm
2
1.8
1.2
ERROR (mV) 1 DIV = 0.005%
VS = ±5V
VO, dm = 12V p-p
9
AMPLITUDE (V)
6
2.4
ERROR (mV) 1 DIV = 0.005%
VO, dm
4
05704-021
26. փཞۉᇸူٷڦ႑ࡽຨༀၚᆌ
05704-023
8
200ns/DIV
–8
05704-026
–0.12
05704-018
–6
50ns/DIV
ADA4941-1
0
0.18
±5V SUPPLIES, POSITIVE RAIL
OUTPUT SATURATION VOLTAGE
WITH RESPECT TO RAIL (V)
–10
–20
–30
PSRR (dB)
–40
+PSRR
–50
–60
–PSRR
–70
–80
–90
0.16
0.14
±5V SUPPLIES, NEGATIVE RAIL
0.12
+5V SUPPLIES, POSITIVE RAIL
0.10
+5V SUPPLIES, NEGATIVE RAIL
0.08
+3V SUPPLIES, POSITIVE RAIL
0.06
–100
0.1
1
10
100
1000
FREQUENCY (MHz)
0.04
–40
+3V SUPPLIES, NEGATIVE RAIL
–20
0
20
40
29. ۉᇸᅞԲᇑೕ୲࠲ڦဣ
100
120
2.5
ICC @ VS = ±5V
VPD = VS–
2.0
SUPPLY CURRENT (mA)
3.0
VS = +5V
2.5
VS = ±5V
2.0
VS = +3V
1.5
ICC @ VS = +3V
ICC @ VS = +5V
1.5
1.0
0.5
1.0
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
–0.5
0.6
30. ۉᇸୁۉᇑ࿒࠲ڦ܈ဣ
1.0
1.2
1.4
1.6
1.8
2.0
33. ۉᇸୁۉᇑਸ࠲ۉუ࠲ڦဣ
140
150
120
125
VOS_A2 = 10V
100
0.8
DISABLE INPUT VOLTAGE WITH RESPECT TO VS– (V)
05704-032
0
05704-029
100
FREQUENCY
VOS_A2 = 5V
75
VOS_A2 = 3V
80
VOS1
MEAN = –8μV
STD. DEV = 47μV
VOS2
MEAN = 11μV
STD. DEV = 20μV
NO. OF UNITS = 611
60
50
40
VOS_A1 10V
VOS_A1 = 5V
40
60
80
TEMPERATURE (°C)
100
120
0
OFFSET VOLTAGE (μV)
31. ֶݴ฿ۙۉუᇑ࿒࠲ڦ܈ဣ
34. ֶݴ฿ۙݴք
Rev. B | Page 12 of 24
05704-033
20
80
100
120
140
160
180
200
0
60
–20
20
40
0
–40
20
05704-030
VOS_A1 = 3V
–20
0
25
–200
–180
–160
–140
–120
–100
–80
–60
–40
POWER SUPPLY CURRENT (mA)
80
32. ԏࢅۉუᇑ࿒࠲ڦ܈ဣ
3.5
DIFFERENTIAL OUTPUT OFFSET (μV)
60
TEMPERATURE (°C)
05704-031
0.01
05704-028
–110
0.001
ADA4941-1
DIFFERENTIAL OUTPUT VOLTAGE NOISE (nV/√Hz)
100
28
INPUT CURRENT NOISE (pA/√Hz)
26
10
24
22
20
18
16
14
12
10
8
6
4
10
100
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
0
05704-034
1
10
1
10k
100k
1M
38. ୁۉሯำᇑೕ୲࠲ڦဣ
3.5
2.65
VS = ±5V
INPUT BIAS CURRENT (μA)
INPUT BIAS CURRENT (μA)
1k
FREQUENCY (Hz)
35. ֶݴۉუሯำᇑೕ୲࠲ڦဣ
2.60
100
05704-037
2
1
VS = +5V
2.55
VS = +3V
2.50
2.45
3.0
2.5
VS = +3V
VS = ±5V
VS = +5V
2.0
–25
–10
5
20
35
50
65
80
95
125
110
TEMPERATURE (°C)
1.5
–0.5
05704-035
0
0.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
INPUT VOLTAGE WITH RESPECT TO VS– (V)
4.0
REFERENCE INPUT BIAS CURRENT (μA)
3.3
3.2
REFERENCE I BIAS = 10V
3.1
3.0
REFERENCE I BIAS = 5V
2.9
REFERENCE I BIAS = 3V
2.8
–20
0
20
40
60
80
100
TEMPERATURE (°C)
120
VREF = VIN
3.5
3.0
VS = +3V
VS = ±5V
VS = +5V
2.5
2.0
05704-036
REFERENCE BIAS CURRENT (μA)
1.5
39. ೋዃୁۉᇑۉუ࠲ڦဣ
36. փཞۉᇸူೋዃୁۉᇑ࿒࠲ڦ܈ဣ
2.7
–40
1.0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10.0
9.5
REFERENCE INPUT VOLTAGE WITH RESPECT TO VS– (V)
40. REFೋዃୁۉᇑREFۉუ࠲ڦဣ
37. REFೋዃୁۉᇑ࿒࠲ڦ܈ဣ
Rev. B | Page 13 of 24
05704-039
2.35
–40
05704-038
2.40
ADA4941-1
14
VS = ±5V
G=4
RF = 1kΩ
RL = ∞
DIS = HIGH
8
12
DISABLE INPUT CURRENT (μA)
DISABLED SUPPLY CURRENT (μA)
10
VS = ±5V
6
VS = +5V
4
VS = +3V
2
10
8
6
4
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
0
05704-040
0
–40
0
1
2
3
4
5
6
7
8
9
10
DISABLE INPUT VOLTAGE WITH RESPECT TO VS– (V)
41. ሏ࠲ݣԿ้փཞۉᇸူۉᇸୁۉᇑ࿒࠲ڦ܈ဣ
05704-043
2
44.ਸ࠲ୁۉᇑਸ࠲ۉუ࠲ڦ
VO, dm
500mV/DIV
500mV/DIV
VO, dm
VPD
40μs/DIV
05704-044
05704-041
VPD
40μs/DIV
42. ࠲Կዃ࿋้क़
45. ࠲Կް࿋้क़
–40
100
VIN = 50mV p-p
–50
10
VON
IMPEDANCE (Ω)
–70
–80
1
0.1
0.01
VOP
–90
–110
0.1
1
10
100
1000
FREQUENCY (MHz)
43. ሏ࠲ݣԿ้߰ᇑೕ୲࠲ڦဣ
0.0001
0.001
0.01
0.1
1
10
FREQUENCY (MHz)
46. ܋ڇፆੇᇑೕ୲࠲ڦဣ
Rev. B | Page 14 of 24
100
05704-025
0.001
–100
05704-042
ISOLATION (dB)
–60
ADA4941-1
߾ፕᇱ
ADA4941-1ᅃࡼࠀگĂ܋ڇĂֶݴٷݣഗLj
ժ ኍ ܔൻ ݴ ߛ ۯՐ ୲ ADC ႜ କ ᆫ ࣅ ă 47ቛ ๖ କ
ADA4941-1ۆڦ႙থݛ๕ăٷݣഗᆯᅃ߲ݥጆᆩٷݣ
ഗA1ൻۯᅃ߲ొՎഗA2ăA1ڦटԥᆅڟᆅ
গ1(FB)LjܸٗሎႹᆩࢽܔሺᅮႜՊײăݒ၎ሏ໙ٷݣഗ
A2ඓݒገA1ڦ႑ࡽVOPLjׂܸิ႑ࡽVONă
ړRF = 0ܸRGԥأඁ้Ljײݛ3०ࣅྺူ๕ǖ
48. ມۉᇸĂG = 2.4Ă܋ڇገֶٷݣݴഗ
48ມۉᇸথڦ๖૩ăԨ૩ዐLjVGࢅVREFยྺ
0 VLjྔևRFࢅRGྪஏ๑A1༵ࠃ1.2ڦཞ၎ሺᅮăԨ૩؊
ݴ૧ᆩࡆࡆڟपăሺᅮࠅ๕ྺǖ
47. एԨথ(࿄၂๖ۉᇸ)
แेڟREFᆅগۉڦუ৽ࠌఇۉუă൩ጀᅪLjแे
ڟREFᆅগۉڦუժփࣷᆖၚOUT+ᆅগۉڦتუăᅺ
ُLjኮक़ᅜ٪ሞֶݴ฿ۙLjܸཞ้ీࠕइڥႴڦ
ࠌఇۉუă૩සLjVOP = 3.5 VVON = 1.5 V้Lj
ࠌఇۉუڪᇀ2.5 VLj৽ࢅଇ߲ྺ2.5 V้ᅃᄣăሞമ
ᅃዖ൧ူLjֶۉݴუ(ई฿ۙ)ྺ2.0 VLjܸሞࢫᅃዖ൧
ူLjֶۉݴუྺ0 Văऺ໙ۉუ้LjՂႷཞ้୯ֶ
ۉݴუࢅࠌఇۉუLjᅜՆ௨փႴᄲݴֶڦ฿ۙă
ڦز825 Ωۉፆᇑᆅগ8ցA1฿ۙۉڦิׂୁۉ
უဃֶăA1ࢅA2ڦ၍Ⴀྷݔᅜકቛ߳ࠃࡆۉ
200 mVᅜాLjܸٗሎႹሞ֑ᆩ±5 Vۉᇸࠃํ้ۉ၄19.2 V
ރރڦኵֶݴۉუă
एԨ߾ፕᇱ!
47ዐLjRGࢅRFࠓྔׯևሺᅮยዃྪஏăVGࢅVREFྺ
ྔևแेۉڦუăVO, cmۨᅭྺࠌఇۉუLjܸVO, dm
ۨᅭྺֶఇۉუăٗ47ᅜڥᅜူײݛǖ
49. +5VۉڇᇸĂG=2܋ڇገֶٷݣݴഗ
49၂๖ڦᆩ5 Vۉڇᇸথڇڦ࿋ሺᅮ߶ໜഗA1ăREF
ᆅগڦت2.5 Vۉუॽࠌఇۉუยዃྺ2.5 Văࡧڿدຕ
ྺǖ
Rev. B | Page 15 of 24
ADA4941-1
ഄዐLj၍Ⴀۉუ၌ᇀA1ă้܋گLjໜጣVOPደॷথ
ৎ200 mVLjA1ڦਸ๔ԏࢅժ၍Ⴀ܈၄ူইăߛ܋
้LjᅃڋVINࡗג4 V(VCCڦ1 V)ాྷݔLjA1नՎׯԏ
ࢅժ၍Ⴀ܈၄ူইăኄࣷॽ49๖ۉୟڦ၍Ⴀֶݴ
ۉუ၌ሞٷሀ7.6 Vރރኵă
֑ᆩࡀ߭༬Ⴀዐڦຕሞऺ໙ဃֶ้Lj๑ᆩ฿ۙۉ
ୁઠ߳༺پೋዃୁۉཚၳࡕࣷ߸ࡻă฿ۙୁۉ
ۨᅭྺଇ߲ೋዃୁۉኮक़ֶڦኵă૧ᆩُۨᅭLj߳
ೋዃୁۉ֑ᆩଇ߲ೋዃڦୁۉೝኵ(IB)ࢅ
฿ۙ(ୁۉIOS)ڦႚ๕๖LjनIBP, N = IB ± IOS/2ăړRS = RF
|| RG้Ljୁဃֶፌၭăُ้Ljײݛ9ᅜ०ࣅྺǖ
ײݛ10๖ڦVONڦتୁۉუဃֶă
ೌాणׯ500 ΩాڦևۉፆLjॽᅺA2ዐ฿ܸۙୁۉሰ
ڦׯୁဃֶইڟፌگăړRS_REF = 0 Ω้Ljဃֶፌၭăُ
้Ljײݛ10ᅜ०ࣅྺǖ
50. 5 VۉᇸࠃۉĂG = 5Ă܋ڇገֶٷݣݴഗ
50၂๖ڦG = 5้ڦ5 VۉڇᇸথăRFࢅRGྪஏॽA1
ڦሺᅮยዃྺ2.5LjܸREFڦت2.5 Vۉუ༵ࠃᅜ2.5 V
ྺዐ႐ڦࠌఇۉუăࡧڿدຕྺǖ
VOP − VON = 5(VIN) − 5 V
(8)
A1ࢅA2ڦྷݔ၌ࣷॽ50๖ۉୟݴֶڦۉუ
၌ሞٷሀ8.4 Vރރኵă
ֶݴۉუဃֶ(VO_error,dm)VOP_errorࢅVON_error
ኮक़ֶڦኵǖ
ُྔLjADA4941-1ฉ߳ٷݣഗڦ฿ۙۉუ࣏ਏᆶᆶ၌
ࠌఇᅞԲ(CMRR)ĂۉᇸᅞԲ(PSRR)ࢅୁਸ࣍ሺᅮ
(AVOL)ڪၳᆌă
ୁဃֶऺ໙!
ഄዐǖ
VOS_nomփԈઔCMRRĂPSRRࢅAVOLၳᆌڦՔ฿ۙ
ۉუă
Δ๖ՔཉॲՎࣅă
51. ୁဃֶᇸ
51၂๖ڦୁۉუဃֶڦዷᄲઠᇸăܔᇀ߳
Ljጺۉუဃֶ๑ᆩຄဒڦሏ໙ٷݣഗ߁ႜऺ໙ă
ײݛ9๖ڦVOPڦتୁۉუဃֶă
V CM ྺࠌఇۉუ)ܔᇀ A1LjྺINۉڦتუLjܸܔᇀ
A2LjሶྺREFۉڦتუ*ă
VSྺۉᇸۉუă
VOUTྺඪᅃሏ໙ٷݣഗă
Rev. B | Page 16 of 24
ADA4941-1
7Ă8ࢅ9၂๖ڦ48Ă49ࢅ50๖ۉୟۆڦ႙
ဃֶᇨ໙ă
RF = 1.0 kΩ, RG = 4.99 kΩ, RS_IN = 825 Ω, RS_REF = 0 Ω
52၂๖ڦADA4941-1ֶݴۉუሯำڦዷᄲઠᇸă
ֶݴሯำۉݛუڪᇀཞ၎ཚ(ڢA1)ሯำۉݛუڦ
ଇԠेฉᇑݒ၎ཚ(ڢA2)၎࠲ڦሯำۉݛუၜă
7. 48๖G = 2.4ٷݣഗڦۉუဃֶᇨ໙
ဃֶᇸ
VOS_A1
IBP_A1
IBN_A1
VOS_A2
ۆ႙ኵ
0.1 mV
3 μA
3 μA
0.1 mV
VOP_error
+0.12 mV
+2.48 mV
−2.48 mV
0 mV
VON_error
−0.12 mV
−2.48 mV
+2.48 mV
+0.2 mV
VO_dm_error
+0.24 mV
−4.96 mV
+4.96 mV
+0.2 mV
ጺ V O_error, dm = 0.44 mV
RF = 0 Ω, RG = ∞, RS_IN = 0 Ω, RS_REF = 0 Ω
8. 49๖ٷݣഗڦۉუဃֶᇨ໙
ဃֶᇸ
ۆ႙ኵ
VOS_A1
IBP_A1
IBN_A1
VOS_A2
0.1 mV
3 μA
3 μA
0.1 mV
ഄዐVON_n2ऺڦ໙ࠅ๕සူǖ!
VOP_error
+0.1 mV
+2.48 mV
−2.48 mV
0 mV
VON_error
−0.1 mV
−2.48 mV
+2.48 mV
+0.2 mV
VO_dm_error
+0.2 mV
−4.96 mV
+4.96 mV
+0.2 mV
ഄዐǖ
ጺ VO_error, dm = 0.4 mV
vn_A1ࢅ vn_A2ݴ՚A1ࢅA2ڦۉუሯำLjժڪᇀ
2.1 nV/√Hză
RF = 1.02 kΩ, RG = 665 Ω, RS_IN = 402 Ω, RS_REF = 0 Ω
in_A1 Ă in_A2 Ă ip_A1 ࢅ ip_A2 ٷݣഗڦୁۉሯำ
ၜLjժڪᇀ1 pA/√Hză
9. 50๖G = 5ٷݣഗڦۉუဃֶᇨ໙
ဃֶᇸ
ۆ႙ኵ
VOS_A1
IBP_A1
IBN_A1
VOS_A2
0.1 mV
3 μA
3 μA
0.1 mV
VOP_error
+0.25 mV
+1.21 mV
−1.21 mV
0 mV
VON_error
−0.25 mV
−1.21 mV
+1.21 mV
+0.2 mV
VO_dm_error
+0.5 mV
−2.4 mV
+2.4 mV
+0.2 mV
RS、RFࢅRGݴ՚ྔևᇸĂݒઍࢅሺᅮۉፆă
kTਨܔ࿒ױ܈ᅜհܻጦதຕLj࿒ူڪᇀ4.2 x
10-21W-să
ጺ V O_error, dm = 0.7 mV
RS_REFREFᆅগڦتᇸፆੇă
ۉუሯำ
ॽA1ᆩፕڇ࿋ሺᅮ߶ໜഗ้Ljۉუሯำೕ܈ፌ
ၭLjྺ10 nV/√HzăۉუሺᅮሁߛLjۉუሯำሁٷă
10Ă11ࢅ12၂๖ڦ48Ă49ࢅ50๖ۉୟڦ
ሯำࠋ၅ࢅۉუሯำă
52. ሯำᇸ
Rev. B | Page 17 of 24
ADA4941-1
10. 48๖G = 2.4ֶٷݣݴഗڦۉუሯำ
ሯำᇸ
vn_A1
ip_A1
in_A1
√4 kTRF
√4 kTRG
√4 kTRS
vn_inverter
√RS_REF
ip_A2 × RS_REF
ۆ႙ኵ
2.1 nV/√Hz
1 pA/√Hz
1 pA/√Hz
4 nV/√Hz
9 nV/√Hz
3.6 nV/√Hz
9.2 nV/√Hz
0
0
VOPࠋ၅ኵ(nV√Hz)
2.5
1
1
4
1.8
4.4
0
0
0
VONࠋ၅ኵ(nV√Hz)
2.5
1
1
4
1.8
4.4
9.2
0
0
VO, dmࠋ၅ኵ(nV√Hz)
5
2
2
8
3.6
8.8
9.2
0
0
ጺऺ
6.8
11.4
16.5
RF = 1.0 kΩLjRG = 4.99 kΩLjRS = 825 ΩLjRS_REF = 0 Ωă
vn_inverter= A2तഄ၎࠲ాև1 kΩݒઍۉፆࢅ500 Ω฿ۙୁۉೝ࢚ۉፆڦሯำࠋ၅ă
11. 49๖G = 2ֶٷݣݴഗڦۉუሯำ
ሯำᇸ
vn_A1
ip_A1
in_A1
√4 kTRF
√4 kTRG
√4 kTRS
vn_inverter
√RS_REF
ip_A2 × RS_REF
ۆ႙ኵ
2.1 nV/√Hz
0
0
0
0
0
9.2 nV/√Hz
0
0
VOPࠋ၅ኵ(nV√Hz)
2.1
0
0
0
0
0
0
0
0
VONࠋ၅ኵ(nV√Hz)
2.1
0
0
0
0
0
9.2
0
0
VO, dmࠋ၅ኵ(nV√Hz)
4.2
0
0
0
0
0
9.2
0
0
ጺऺ
2.1
9.4
10
RF = 0 Ω, RG = ∞, RS = 0 Ω, RS_REF = 0 Ω.
12. 50๖G = 5ֶٷݣݴഗڦۉუሯำ
ሯำᇸ
vn_A1
ip_A1
in_A1
√4 kTRF
√4 kTRG
√4 kTRS
vn_inverter
√RS_REF
ip_A2 × RS_REF
ۆ႙ኵ
2.1 nV/√Hz
1 pA/√Hz
1 pA/√Hz
4 nV/√Hz
3.26 nV/√Hz
2.54 nV/√Hz
9.2 nV/√Hz
0
0
VOPࠋ၅ኵ(nV√Hz)
5.25
1
1
4
4.9
6.54
0
0
0
VONࠋ၅ኵ(nV√Hz)
5.25
1
1
4
4.9
6.54
9.2
0
0
VO, dmࠋ၅ኵ(nV√Hz)
10.5
2
2
8
9.8
13.1
9.2
0
0
ጺऺ
10.7
14.1
23.1
RF = 1.02 kΩ, RG = 665 Ω, RS = 402 Ω, RS_REF = 0 Ω.
Rev. B | Page 18 of 24
ADA4941-1
ೕ୲ၚᆌᇑԿ࣍ሺᅮ
ADA4941-1ዐ๑ᆩڦۉუሏ໙ٷݣഗă ڦਸ࣍ೕ୲ၚ
ᆌ߶ओݴഗၚᆌૌຼă ੂ53ă
ݒ၎ٷݣഗA2ਏᆶᅃ߲ࠦۨݒڦઍྪஏăࡧڿدຕٷዂ
ྺǖ
A1ڦೕ୲ၚᆌൽਦᇀײݛ15๖ྔڦևݒઍྪஏăᅺ
ُLjጺֶݴۉუྺǖ
53. ADA4941-1ሏ໙ٷݣഗਸ࣍ሺᅮᇑೕ୲࠲ڦဣ
ܔᇀ߲ٷݣഗLjೕ୲ၚᆌཚࡗူ๕ႜৎຼऺ໙ǖ
ॽ߳ၜ၎ױժูඁࢮփऺڦၜनڟڥᅜူৎຼኵǖ
!!!!!!!!)ཞ၎ၚᆌ*
!!!!!!!!(ݒ၎ၚᆌ)
fCRྺٷݣഗڦሺᅮټೕ୲(ഄዐ53๖ڦਸ࣍ሺᅮڪᇀ
1)ăଇ߲ٷݣഗڦfCRሀྺ50 MHză
ُࡧڿدຕᆶଇ߲टۅLjܸডگೕ୲ڦटࣷۅ၌ֶݣݴ
ٷഗ ټ ڦă ස ࡕVOP ܌ୟ IN−) A1ྺ ڇ࿋ ሺ ᅮ ߶ ໜ
ഗ*Ljݒ၎ཚڦڢ25 MHzԿ࣍ࣷټ၌ኝ༹ټăړA1
֑ᆩডߛሯำሺᅮ้Ljࣷټ၌ᇀA1ڦԿ࣍ټLjܸࢫ
ኁᇑሯำሺᅮ(1 + RF/RG)ݒׯԲă૩සLjසࡕྔևݒઍྪ
ஏڦሯำሺᅮྺ10Ljሶࣷټই5 MHză
Rev. B | Page 19 of 24
ADA4941-1
ᆌᆩ
߁ຎ
ADA4941-1ᅃۙሺᅮĂ܋ڇገֶۉݴუٷݣഗLjժ
ኍܔൻݴߛۯՐ୲ADCႜକᆫࣅă܋ڇገֶݴሺᅮᆯᅃ
߲ݒઍྪஏ੦Ljྪஏᆯᅜူଇ߲ྔևۉፆࠓׯǖRFࢅ
R Gă
๑ᆩREFᆅগ
REFᆅগॽए၍ยዃሞݒ၎ୟ০ዐLjժᆩፕ႑ࡽ
ڦएጚăሞٷևݴᆌᆩዐLjREFᆅগยዃྺ႑ࡽዐक़
ӦۉޗೝLjࢪ้ܠᄺྺዐक़ۉᇸۉუăܔᇀມटႠ႑
ࡽࢅມۉᇸࠃۉLjREFཚยዃྺۉںუăሞۉڇᇸᆌᆩ
ዐLjॽREFยዃྺ႑ࡽዐक़Ӧۉޗೝ༵ࠃਏᆶፌၭ
ֶݴ฿ۙڦፌᆫۯༀྷݔႠీă൩ጀᅪLjREFኻ
ࣷᆖၚݒ၎႑ࡽୟ০ईVONă
ܠٷຕᆌᆩᄲ൱ሞ߳ࠃ༵܋ਏᆶ၎ཞୁࠌఇۉೝڦ
ֶݴ႑ࡽăሞVOPࢅVONฉ֪ଉڦڟ႑ࡽీਏᆶ
ႴۉೝࠌڦఇۉუLjڍڦ܋ۉუీփᅃᄣăཚ
ࣷՆ௨ُૌ႑ࡽLjᅺྺ݆ᆶၳں૧ᆩٷݣഗڦۯ
ༀྷݔă
ැॽVINۨᅭྺแेڟᆅগۉڦუLjሶਦۨଇ߲႑ࡽ
ୟ০ݴײݛڦ՚ྺײݛ21ࢅײݛ22ă
VOP = VIN
(21)
VON = −VIN + 2 (REF)
(22)
ړREFۉუยዃྺ႑ࡽڦዐक़ӦۉޗೝLjሶଇ߲
႑ࡽࣷዘ۠Ljܸ฿ۙࣷ३ณڟፌၭăܸॽREFۉუยዃ
ڟඪࢆഄݛںLjሶࣷڞዂଇ߲ኮक़၄฿ۙă
ྺକᅃօຫREFᆅগڦፌॅᆩ݆Ljူ௬ઠੂੂۉᇸۉ
უྺ10 V႑ࡽ࿋ᇀ2 Vࢅ7 Vኮक़ۉڇڦᇸӄ૩ăԨ
૩ዐ႑ࡽڦዐक़Ӧۉޗೝժփዐक़ۉᇸۉუLjܸ
4.5 VăཚࡗॽREFยዃྺ4.5 Vժࢮ฿ۙLjሶ๑ᆩ
ײݛ21ࢅײݛ22ઠऺ໙ࡕăړ႑ࡽ࿋ᇀዐक़ۅ4.5 V
้LjOUT+ྺ4.5 VLjٷၭᇑVONᅃᄣăኄፕᅃዖए၍
ጒༀLjֶُ้ݴۉუྺ0ăړሺेڟ7 V้LjVOP
߶ጷሺेڟ7 VLjܸVONࣷই2 Văኄፕᅃ߲ኟ
ރኵ႑ࡽLjֶُ้ݴۉუڪᇀ5 Văړ႑ࡽই2
V้LjVOPምْ߶ጷ2 VLjܸVONࣷሺेڟ7 Văኄ
ፕᅃ߲ރኵ႑ࡽLjֶُ้ݴۉუڪᇀ−5 VăᅺُLj
ݴֶڥۉუྺ10 Vރރኵă
ٗኮമڦ༪ஃᅜੂٷၭྺ2܋ڇڦገֶݴሺᅮසࢆ
ํ၄ڦă
ాևݒઍྪஏࠀࡼ
دཥሏ໙ٷݣഗժփԈࡤೌాݒઍᇮॲLjܸADA4941-1ದ
ᆶଇ߲ೌా1 kΩۉፆLjኄଇ߲ۉፆࠓׯକᅃ߲ాևݒઍ࣍
ୟăሞऺ໙ഗॲڦጺࠀࡼ้LjՂႷ୯ኄၵۉፆࠀڦ
ࡼăగၵ൧ူLjኄၵۉፆࡼࠀڦీᇑഗॲৢڦༀࠀ
ࡼփ၎ฉူă૩සLjۉᇸۉუྺ±5 VĂREFᆅগথںLj
OUT−ྺ+4 VDC้Lj߲1 kΩۉፆฉྺୁۉڦ4 mALjᅺُ
߲ۉፆྺࡼࠀڦ16 mWLjଇ߲ۉፆڦጺࠀࡼྺ32 mWă
ኄᇑৢༀࠀࡼփ၎ฉူLjᅺُऺ໙ഗॲጺࠀࡼ้ՂႷ୯
ሞాăܔᇀୁ႑ࡽLjሶႴᄲႜݴߵݛဆă
্ᆩ༬Ⴀ
ADA4941-1ਏᆶਸ࠲ࠀీLjሞ༬้ۨक़ॽᆩഗॲࠀڦ
ࡼইፌگăዃ࿋้Ljਸ࠲ࠀీփࣷॽഗॲዃᇀߛፆ
ੇईෙༀཉॲူăਸ࠲༬Ⴀྺߛۉೝᆶၳăᆶ࠲ߛۉگೝ
ۉუ༬ႠLj൩֖९ࡀ߭༬Ⴀă
Rev. B | Page 20 of 24
ADA4941-1
ཁे3टۅSallen-Key୳հഗ
54ቛ๖ڦ3टۅSallen-Keyگཚ୳հഗLj ڦপೕ୲
100 kHzăԈࡤڦ1.69 kΩۉፆᆩᇀॽᅺA1ዐ฿ۙ
ୁۉሰڦׯୁဃֶইፌၭăൻڦۯADCገ࣑ഗཚ
Ⴔᄲֶݴሏݣሞ܋ದዃᇸRC୳հഗă୳հഗڦೕ
୲ၚᆌ൸၍ස55๖ă
ADA4941-1ዐڦཞ၎ٷݣഗᆩፕSallen-Key୳հഗ࣐ڦ؋
ٷݣഗăܸ3टگۅཚ୳հഗยऺᆩᇀሞADCኮമ၌
႑ࡽټă႑ࡽံୁࡗཞ၎पժሞتႜࡗ୳ă
থጣLj୳հࢫڦ႑ࡽୁࡗݒ၎पLjᅜइࢻڥցă
OUT+
3
10nF
562Ω
562Ω
1.69kΩ 1
562Ω
8
FB
VS+
6
560pF
3.9nF
OUT–
A2
REF
+
VO, dm
–
0.1μF
1kΩ
VS–
2
33Ω
2.7nF
1kΩ
+5V
A1
IN
4
5
33Ω
2.7nF
500Ω
–5V
0.1μF
05704-058
VIN
54. Sallen-Keyگཚ୳հഗᇑ100 kHzপኹೕ୲
0
VO, dm = 3V p-p
–10
–20
VO, dm/VIN (dB)
–30
–40
–50
–60
–70
–80
–100
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
55. 54๖ۉୟڦೕ୲ၚᆌ
Rev. B | Page 21 of 24
10M
100M
05704-059
–90
ADA4941-1
ൻۯAD7687 ADC
−2ሺᅮದዃ
ADA4941-1ᅃࢇAD7687ݴߛڪՐ୲ADCڦൻۯ
ഗLjස56๖ăԨ૩Ԉࡤ54๖ڦSallen-Keyگཚ୳հ
ഗLjํڍाฉᆶă56๖ۉڦୟথӦޗሞ0 Vࢅ
3 Vኮक़܋ڇڦ႑ࡽă
ADA4941-1ᅜሞሺᅮྺ−2ڦದዃူ߾ፕă၂Lj−2ڦሺ
ᅮཚࡗ०࣑ࢻںڇ+2ሺᅮۉୟڦઠํ၄Ljڍُت
ถڦದዃᆶփཞăದዃ֑ᆩሺᅮઠഽۙٷݣ
ഗ(A1)ፕྺݒ၎ٷݣഗ๑ᆩLjܸփሞഄ९ཞ၎ఇ๕
ူ߾ፕăኟසഄఁ๖LjٗVINڟVO, dmۉڦუሺᅮྺ−
2 V/Văᆶ࠲ۉᇸۉუྺ±5 V้−2ሺᅮದዃڦ൧Lj൩֖
९57ă
ADR443༵ࠃ࿘ۨĂگሯำڦ3 VएጚۉუᇸLjࢫएጚ
ۉუᇸᆯഄዐᅃ߲AD8032ٷݣഗ࣐؋ժแेڟAD7687
REF܋Ljܸ༵ٗࠃ6 Vݴֶڦଉۉײೝăཞ้Lj
एጚۉუ࣏ࣷႜܾݴೕࢅ࣐؋تLjܸٗၠADA4941-1
༵ࠃ1.5 Vڦዐक़ۉᇸۉუREFۉೝă
−2ሺᅮದዃሞਏᆶӦڦޗᆌᆩዐፌྺᆶᆩLjᅺྺ
ࠌఇۉუࣷԍۉ࢛ۨೝăᅺُLj႑ࡽٷၭ၌ᇀ
Ӧޗ၌ă−2ሺᅮਏᆶگፆੇLjٷၭڪᇀRGă
+5V
0.1μF
OUT+
1kΩ
3
10nF
562Ω
VS+
IN
8
VS– ADA4941-1
2 REF 500Ω
6
VIN
0V TO 3V
560pF
3.9nF
2
0.1μF
VIN
VOUT
GND
33Ω
4
IN– GND
REF
5
1
0.1μF
+5V
+5V
10μF
5
2.7nF
–5V
ADR443
OUT–
A2
IN+ VDD
AD7687
0.1μF
1kΩ
A1
2
3
10μF
0.1μF
6
3
8
1
0.1μF
2
4
1/2
4 AD8032
10μF
1kΩ
5
7
1kΩ
6
1/2
AD8032
56. ADA4941-1ൻۯAD7687 ADC
RF
1kΩ
OUT+
3
RG
1kΩ
1
8
VIN
FB
1kΩ
+5V
VS+
VS–
2
500Ω
6
+
VO, dm
–
1kΩ
A1
IN
4
A2
REF
500Ω
–5V
57. −2ሺᅮದዃ
Rev. B | Page 22 of 24
OUT–
5
05704-060
562Ω
FB
33Ω
2.7nF
05704-061
562Ω
1.69kΩ 1
4
ADA4941-1
ྔႚ٫
5.00 (0.1968)
4.80 (0.1890)
8
4.00 (0.1574)
3.80 (0.1497)
1
5
4
6.20 (0.2441)
5.80 (0.2284)
1.27 (0.0500)
BSC
1.75 (0.0688)
1.35 (0.0532)
0.25 (0.0098)
0.10 (0.0040)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
SEATING
PLANE
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
012407-A
COMPLIANT TO JEDEC STANDARDS MS-012-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
58. 8ᆅগՔጚၭ႙ހጎ[SOIC_N]
༹(R-8)
๖٫ڇ࿋ǖmmࢅ(inches)
0.60 MAX
5
PIN 1
INDICATOR
2.95
2.75 SQ
2.55
TOP
VIEW
8
12° MAX
SEATING
PLANE
0.50
0.40
0.30
0.70 MAX
0.65 TYP
0.05 MAX
0.01 NOM
0.30
0.23
0.18
0.20 REF
1.60
1.45
1.30
EXPOSED
PAD
(BOTTOM VIEW)
4
0.90 MAX
0.85 NOM
0.50
BSC
0.60 MAX
1
1.89
1.74
1.59
PIN 1
INDICATOR
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
090308-B
3.25
3.00 SQ
2.75
59. 8ᆅগᆅগॐࠓႊೌपހጎ[LFCSP_VD]
3 mm x 3 mmLjגԋ༹Ljມଚᆅগ(CP-8-2)
๖٫ڇ࿋ǖmm
۩ࠔኸళ
႙ࡽ!
ADA4941-1YRZ
ADA4941-1YRZ-RL
ADA4941-1YRZ-R7
ADA4941-1YCPZ-R2
ADA4941-1YCPZ-RL
ADA4941-1YCPZ-R7
1
࿒!ྷݔ܈
−40°C +125°C
−40°C +125°C
−40°C +125°C
−40°C +125°C
−40°C +125°C
−40°C +125°C
ހጎ௮ຎ!
8ᆅগSOIC_N
8ᆅগSOIC_N
8ᆅগSOIC_N
8ᆅগLFCSP_VD
8ᆅগLFCSP_VD
8ᆅগLFCSP_VD
Z = ࢇޙRoHSՔጚڦग़ඹഗॲă
Rev. B | Page 23 of 24
ހጎၜ!
R-8
R-8
R-8
CP-8-2
CP-8-2
CP-8-2
۩ࠔຕଉ!
98
2,500
1,000
250
5,000
1,500
Ք๎
H0C
H0C
H0C
ADA4941-1
ጀ
©2009–2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05704-0-3/09(A)
Rev. B | Page 24 of 24