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8/9/2019 100MHz Operational Amplifier
1/16
8/9/2019 100MHz Operational Amplifier
2/162
LT1813/LT1814
18134fa
Total Supply Voltage (V+ to V)LT1813/LT1814 ................................................ 12.6VLT1813HV ........................................................ 13.5V
Differential Input Voltage (Transient Only, Note 2) .. 6VInput Voltage ............................................................VSOutput Short-Circuit Duration (Note 3) ........... IndefiniteOperating Temperature Range ................ 40C to 85C
ABSOLUTE AXI U RATI GS W W W U
PACKAGE/ORDER I FOR ATIOU UW
TJMAX = 150C, JA = 250C/W
Consult LTC marketing for parts specified with wider operating temperature ranges. *See Note 9.**The temperature grades are identified by a label on the shipping container.
Specified Temperature Range (Note 8) .. 40C to 85CMaximum Junction Temperature ......................... 150C
(DD Package) ................................................... 125C
Storage Temperature Range ................ 65C to 150C(DD Package) ................................... 65C to 125C
Lead Temperature (Soldering, 10 sec)................. 300C
(Note 1)
ORDER PARTNUMBER
LT1814CSLT1814IS
1234
OUTAIN A+IN A
V
8765
V+
OUT BIN B+IN B
TOP VIEW
MS8 PACKAGE8-LEAD PLASTIC MSOP
TJMAX = 150C, JA = 110C/W
TOP VIEW
V +
OUT B
IN B
+IN B
OUT A
IN A
+IN A
V
S8 PACKAGE8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5B
A
TOP VIEW
S PACKAGE14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
IN A
+IN A
V+
+IN B
IN B
OUT B
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
+
+
+
+
A
B
D
C
LT1813DS8*LT1813CS8LT1813IS8
LT1813HVDS8*LT1813HVCS8LT1813HVIS8
ORDER PARTNUMBER
TJMAX = 150C, JA = 150C/W
LT1813DMS8*
MS8 PART MARKING
LTGZ
ORDER PARTNUMBER
S8 PARTMARKING
1813D18131813I
813HVD1813HV813HVI
TOP VIEW
GN PACKAGE16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OUT A
IN A
+IN A
V+
+IN B
IN B
OUT B
NC
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
NC
+
+
+
+
A
B
D
C
TJMAX = 150C, JA = 135C/W
ORDER PARTNUMBER
GN PART
MARKING
LT1814CGNLT1814IGN
18141814I
TOP VIEW
DD PACKAGE8-LEAD (3mm 3mm) PLASTIC DFN
UNDERSIDE METALINTERNALLY CONNECTED TO V
5
6
7
8
4
3
2
1OUT A
IN A
+IN A
V
V+
OUT B
IN B
+IN BB
A
TJMAX = 125C, JA = 160C/W
ORDER PARTNUMBER
DD PART MARKING**
LT1813DDD*LT1813CDDLT1813IDD
LAAQ
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ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 0V, unless otherwise noted. (Note 8)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage (Note 4) 0.5 1.5 mVT
A= 0C to 70C 2 mV
TA = 40C to 85C 3 mV
VOS Input Offset Voltage Drift (Note 7) TA = 0C to 70C 10 15 V/C T TA = 40C to 85C 10 30 V/C
IOS Input Offset Current 50 400 nATA = 0C to 70C 500 nATA = 40C to 85C 600 nA
IB Input Bias Current 0.9 4 ATA = 0C to 70C 5 ATA = 40C to 85C 6 A
en Input Noise Voltage Density f = 10kHz 8 nV/ Hz
in Input Noise Current Density f = 10kHz 1 pA/ Hz
RIN Input Resistance VCM = 3.5V 3 10 MDifferential 1.5 M
CIN Input Capacitance 2 pF
VCM Input Voltage Range Guaranteed by CMRR 3.5 4.2 VTA = 40C to 85C 3.5 V
CMRR Common Mode Rejection Ratio VCM = 3.5V 75 85 dBTA = 0C to 70C 73 dBTA = 40C to 85C 72 dB
Minimum Supply Voltage Guaranteed by PSRR 1.25 2 VTA = 40C to 85C 2 V
PSRR Power Supply Rejection Ratio VS = 2V to 5.5V 78 97 dBTA = 0C to 70C 76 dBTA = 40C to 85C 75 dB
VS = 2V to 6.5V (LT1813HV) 75 97 dBTA = 0C to 70C 73 dBTA = 40C to 85C 72 dB
AVOL Large-Signal Voltage Gain VOUT = 3V, RL = 500 1.5 3 V/mVTA = 0C to 70C 1.0 V/mVTA = 40C to 85C 0.8 V/mV
VOUT = 3V, RL = 100 1.0 2.5 V/mVTA = 0C to 70C 0.7 V/mVTA = 40C to 85C 0.6 V/mV
VOUT Maximum Output Swing RL = 500, 30mV Overdrive 3.8 4 V(Positive/Negative) TA = 0C to 70C 3.7 V
TA = 40C to 85C 3.6 V
RL
= 100, 30mV Overdrive 3.35 3.5 VTA = 0C to 70C 3.25 VTA = 40C to 85C 3.15 V
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ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 0V, unless otherwise noted. (Note 8)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IOUT Maximum Output Current VOUT = 3V, 30mV Overdrive 40 60 mATA = 0C to 70C 35 mATA = 40C to 85C 30 mA
ISC Output Short-Circuit Current VOUT = 0V, 1V Overdrive (Note 3) 75 100 mATA = 0C to 70C 60 mATA = 40C to 85C 55 mA
SR Slew Rate AV = 1 (Note 5) 500 750 V/ sTA = 0C to 70C 400 V/sTA = 40C to 85C 350 V/s
FPBW Full Power Bandwidth 6VP-P (Note 6) 40 MHz
GBW Gain Bandwidth Product f = 200kHz, RL = 500 75 100 MHzTA = 0C to 70C 65 MHzTA = 40C to 85C 60 MHz
3dB BW 3dB Bandwidth AV = 1, RL = 500 200 MHz
tr, tf Rise Time, Fall Time AV = 1, 10% to 90%, 0.1V, RL = 100 2 nstPD Propagation Delay (Note 10) AV = 1, 50% to 50%, 0.1V, RL = 100 2.8 ns
OS Overshoot AV = 1, 0.1V, RL = 100 25 %
tS Settling Time AV = 1, 0.1%, 5V 30 ns
THD Total Harmonic Distortion AV = 2, f = 1MHz, VOUT = 2VP-P, RL = 500 76 dB
dG Differential Gain AV = 2, VOUT = 2VP-P, RL = 150 0.12 %
dP Differential Phase AV = 2, VOUT = 2VP-P, RL = 150 0.07 DEG
ROUT Output Resistance AV = 1, f = 1MHz 0.4
Channel Separation VOUT = 3V, RL = 100 82 100 dBTA = 0C to 70C 81 dBTA = 40C to 85C 80 dB
IS Supply Current Per Amplifier 3 3.6 mATA = 0C to 70C 4.5 mATA = 40C to 85C 5.0 mA
Per Amplifier,VS = 6.5V, (LT1813HV only) 4.0 mATA = 0C to 70C 5.0 mATA = 40C to 85C 5.5 mA
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SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOS Input Offset Voltage (Note 4) 0.7 2.0 mV
TA = 0C to 70C
2.5 mVTA = 40C to 85C 3.5 mV
VOS Input Offset Voltage Drift (Note 7) TA = 0C to 70C 10 15 V/C T TA = 40C to 85C 10 30 V/C
IOS Input Offset Current 50 400 nATA = 0C to 70C 500 nATA = 40C to 85C 600 nA
IB Input Bias Current 1 4 ATA = 0C to 70C 5 ATA = 40C to 85C 6 A
en Input Noise Voltage Density f = 10kHz 8 nV/ Hz
in Input Noise Current Density f = 10kHz 1 pA/ Hz
RIN Input Resistance VCM = 3.5V 3 10 MDifferential 1.5 M
CIN Input Capacitance 2 pF
VCM Input Voltage Range Guaranteed by CMRR 3.5 4.2 V(Positive) TA = 40C to 85C 3.5 V
Input Voltage Range Guaranteed by CMRR 0.8 1.5 V(Negative) TA = 40C to 85C 1.5 V
CMRR Common Mode Rejection Ratio VCM = 1.5V to 3.5V 73 82 dBTA = 0C to 70C 71 dBTA = 40C to 85C 70 dB
Minimum Supply Voltage Guaranteed by PSRR 2.5 4 VTA = 40C to 85C 4 V
AVOL Large-Signal Voltage Gain VOUT = 1.5V to 3.5V, RL = 500 1.0 2 V/mVTA = 0C to 70C 0.7 V/mVTA = 40C to 85C 0.6 V/mV
VOUT = 1.5V to 3.5V, RL = 100 0.7 1.5 V/mVTA = 0C to 70C 0.5 V/mVTA = 40C to 85C 0.4 V/mV
VOUT Maximum Output Swing RL = 500, 30mV Overdrive 3.9 4.1 V(Positive) TA = 0C to 70C 3.8 V
TA = 40C to 85C 3.7 V
RL = 100, 30mV Overdrive 3.7 3.9 VTA = 0C to 70C 3.6 VTA = 40C to 85C 3.5 V
Maximum Output Swing RL = 500, 30mV Overdrive 0.9 1.1 V(Negative) TA = 0C to 70C 1.2 V
TA = 40C to 85C 1.3 V
RL = 100, 30mV Overdrive 1.1 1.3 VTA = 0C to 70C 1.4 VTA = 40C to 85C 1.5 V
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. (Note 8)
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ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. (Note 8)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IOUT Maximum Output Current VOUT = 1.5V or 3.5V, 30mV Overdrive 25 35 mAT
A= 0C to 70C 20 mA
TA = 40C to 85C 17 mA
ISC Output Short-Circuit Current VOUT = 2.5V, 1V Overdrive (Note 3) 55 75 mATA = 0C to 70C 45 mATA = 40C to 85C 40 mA
SR Slew Rate AV = 1 (Note 5) 200 350 V/ sTA = 0C to 70C 150 V/sTA = 40C to 85C 125 V/s
FPBW Full Power Bandwidth 2VP-P (Note 6) 55 MHz
GBW Gain Bandwidth Product f = 200kHz, RL = 500 65 94 MHzTA = 0C to 70C 55 MHzTA = 40C to 85C 50 MHz
3dB BW 3dB Bandwidth AV = 1, RL = 500 180 MHz
tr, tf Rise Time, Fall Time AV = 1, 10% to 90%, 0.1V, RL = 100 2.1 nstPD Propagation Delay (Note 10) AV = 1, 50% to 50%, 0.1V, RL = 100 3 ns
OS Overshoot AV = 1, 0.1V, RL = 100 25 %
tS Settling Time AV = 1, 0.1%, 2V 30 ns
THD Total Harmonic Distortion AV = 2, f = 1MHz, VOUT = 2VP-P, RL = 500 75 dB
dG Differential Gain AV = 2, VOUT = 2VP-P, RL = 150 0.22 %
dP Differential Phase AV = 2, VOUT = 2VP-P, RL = 150 0.21 DEG
ROUT Output Resistance AV = 1, f = 1MHz 0.45
Channel Separation VOUT = 1.5V to 3.5V, RL = 100 81 100 dBTA = 0C to 70C 80 dBTA = 40C to 85C 79 dB
IS Supply Current Per Amplifier 2.9 4.0 mATA = 0C to 70C 5.0 mATA = 40C to 85C 5.5 mA
Note 1: Absolute Maximum Ratings are those values beyond which the lifeof the device may be impaired.
Note 2: Differential inputs of 6V are appropriate for transient operationonly, such as during slewing. Large sustained differential inputs can causeexcessive power dissipation and may damage the part.
Note 3: A heat sink may be required to keep the junction temperaturebelow absolute maximum when the output is shorted indefinitely.
Note 4: Input offset voltage is pulse tested and is exclusive of warm-updrift.
Note 5: Slew rate is measured between 2V at the output with 3V inputfor 5V supplies and 2VP-P at the output with a 3VP-P input for single 5Vsupplies.
Note 6: Full power bandwidth is calculated from the slew rate:
FPBW = SR/2VP
Note 7: This parameter is not 100% tested
Note 8: The LT1813C/LT1814C are guaranteed to meet specifiedperformance from 0C to 70C and is designed, characterized andexpected to meet the extended temperature limits, but is not tested at40C and 85C. The LT1813I/LT1814I are guaranteed to meet theextended temperature limits.
Note 9: The LT1813D is 100% production tested at 25C. It is designed,characterized and expected to meet the 0C to 70C specificationsalthough it is not tested or QA sampled at these temperatures. TheLT1813D is guaranteed functional from 40C to 85C but may not meetthose specifications.
Note 10: Propagation delay is measured from the 50% point on the inputwaveform to the 50% point on the output waveform.
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TEMPERATURE (C)
50 250
SUPPLYCURRENT(mA)
2
5
0 50 75
1813/14 G01
1
4
3
25 100 125
PER AMPLIFIER
VS = 5V
VS = 2.5V
SUPPLY VOLTAGE ( V)
0V
INPUTCOMMONMODERANGE(V)
1.0
1.5
2.0
V
+
2.0
1.5
2 4 5
1813/14 G02
0.5
1.0
0.5
1 3 6 7
TA = 25CVOS < 1mV
INPUT COMMON MODE VOLTAGE (V)
5.0
INPUTBIASCURRENT(A)
1.0
0.5
TA = 25CVS = 5V
5.0
1813/14 G03
1.5
2.02.5 0 2.5
0
TEMPERATURE (C)
50
INPUTBIASCURRENT(A)
0.8
0.7
0.6
25 75
1813/14 G04
0.9
1.0
25 0 50 100 125
1.1
1.2
VS = 5V
FREQUENCY (Hz)
10 1001
10in
100
0.1
1
10
1k 10k 100k
1813/14 G05
TA = 25CVS = 5VAV = 101RS = 10k
en
INP
UTVOLTAGENOISE(nV/Hz)
INPUTCURRENTNOISE(pA/
Hz)
LOAD RESISTANCE ()100
60
OPEN-LOOPGAIN(dB)
62.5
65.0
67.5
70.0
75.0
1k 10k
1813/14 G06
72.5
TA = 25C
VS = 5V
VS = 2.5V
Supply Current vs TemperatureInput Common Mode Range vsSupply Voltage
Input Bias Currentvs Common Mode Voltage
Input Bias Current vs Temperature Input Noise Spectral DensityOpen-Loop Gainvs Resistive Load
TYPICAL PERFOR A CE CHARACTERISTICSUW
TEMPERATURE (C)
50
OPEN-L
OOPGAIN(dB)
70.0
72.5
75.0
25 75
1813/14 G07
67.5
65.0
25 0 50 100 125
62.5
60.0
VS = 5VVO = 3V
RL = 500
RL = 100
SUPPLY VOLTAGE ( V)
0V
OUTPUTVOLTAGESWING(V)
1.0
1.5
2.0
V+
2.0
1.5
2 4 5
1813/14 G02
0.5
1.0
0.5
1 3 6 7
TA = 25CVIN = 30mV
RL = 100
RL = 100
RL = 500
RL = 500
OUTPUT CURRENT (mA)
60
OUTPUTVOLTAGESWING(V)
2.0
1.0
1.5
V+
0.5
20
1813/14 G09
2.0
1.0
1.5
0.5
V
40 20 0 40 60
VS = 5VVIN = 30mV
85C25C 40C
Open-Loop Gain vs TemperatureOutput Voltage Swingvs Supply Voltage
Output Voltage Swingvs Load Current
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TYPICAL PERFOR A CE CHARACTERISTICSUW
TEMPERATURE (C)
5080
OUTPUTSHORT-CIRCUITCURRENT(mA)
90
100
110
120
25 0 25 50
1813/14 G10
75 100 125
VS = 5V
SOURCE
SINK
SETTLING TIME (ns)
05
OUTPUTSTEP(V)
4
2
1
0
5
2
10 20 25
1813/14 G11
3
3
4
1
5 15 30 35
VS = 5VAV = 1RF = 500CF = 3pF0.1% SETTLING
FREQUENCY (Hz)
10k 100k0.001
OUTPUTIMPEDANCE()
0.1
100
1M 10M 100M
1813/14 G12
0.01
1
10AV = 100
AV = 10
AV = 1
TA = 25CVS = 5V
FREQUENCY (Hz)
10
GAIN(dB)
20
40
60
70
10k 1M 10M 1000M
1813/14 G13
0
100k 100M
50
30
10
0
PHASE(DEG)20
60
100
120
20
80
40
40
PHASEGAIN
5V
5V
2.5V
2.5V
TA = 25CAV = 1RF = RG = 500
FREQUENCY (Hz)
70
CROSSTALK(dB)
60
40
30
10
0
100k 10M 100M
1813/14 G14
80
1M 1000M
20
50
90
TA = 25CAV = 10VIN = 0dBmRL = 100
TEMPERATURE (C)
50 25
GAINBANDWIDTH(MHz) P
HASEMARGIN(DEG)
85
115
0 50 75
1813/14 G15
36
40
38
105
95
25 100 125
GBWVS = 5V
GBWVS = 2.5V
PHASE MARGINVS = 2.5V
PHASE MARGINVS = 5V
RL = 500
Output Short-Circuit Currentvs Temperature
Gain Bandwidth and PhaseMargin vs TemperatureCrosstalk vs FrequencyGain and Phase vs Frequency
Output Impedance vs FrequencySettling Time vs Output Step
FREQUENCY (Hz)
1M
6
VOLTAGEMAGNITU
DE(dB)
4
2
0
2
10M 100M 500M
1813/14 G16
8
10
12
14
4
6TA = 25CAV = 1NO RL
VS = 2.5V
VS = 5V
FREQUENCY (Hz)
1M
2
VOLTAGEMAGNITUDE(dB)
4
6
8
10M 100M 500M
1813/14 G17
0
2
4
6
VS = 5V
TA = 25CAV = 2RL = 100
VS = 2.5V
FREQUENCY (Hz)
1
0
VOLTAGEMAGNITUDE(dB)
4
8
10M 100M 200M
1813/14 G18
4
8
12TA = 25CAV = 1VS = 5VRF = RG = 500NO RL
CL= 1000pF
CL= 500pF
CL= 200pF
CL= 100pF
CL= 50pF
CL= 0
Frequency Responsevs Capacitive Load, AV = 1
Frequency Responsevs Supply Voltage, AV = 2
Frequency Responsevs Supply Voltage, AV = 1
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TYPICAL PERFOR A CE CHARACTERISTICSUW
SUPPLY VOLTAGE (
V)
0
GAINBANDWIDTH(MHz) P
HASEMARGIN(DEG)
3
1813/14 G19
70 45
40
351 2 4
110
90
5 6 7
TA = 25C GBWRL = 500
GBWRL = 100
PHASE MARGINRL = 100
PHASE MARGINRL = 500
FREQUENCY (Hz)
1k 10k 100k
40
POWERSUPPLYREJECTIONRATIO(dB)
60
80
1M 10M 100M
1813/14 G20
20
0
100
PSRR
+PSRR
TA = 25CAV = 1VS = 5V
FREQUENCY (Hz)
1k 10k 100k
40
COMMONMODEREJECTIONRATIO(dB)
60
80
1M 10M 100M
1813/14 G21
20
0
100 TA = 25CVS = 5V
Gain Bandwidth and PhaseMargin vs Supply Voltage
Power Supply Rejection Ratiovs Frequency
Common Mode Rejection Ratiovs Frequency
Slew Rate vs Supply Voltage Slew Rate vs Supply Voltage Slew Rate vs Input Level
SUPPLY VOLTAGE (V)
00
SLEW
RATE(V/s)
100
300
400
500
1000
700
2 4 5
1813/14 G22
200
800
900
600
1 3 6 7
TA =25CAV = 1VIN = VS(TOTAL)/2RF = RG = RL = 500
SR+
SR
SUPPLY VOLTAGE (V)
0200
SLEW
RATE(V/s)
300
450
2 4 5
1813/14 G23
250
400
350
1 3 6 7
TA =25CAV = 1VIN = 1VRF = RG = RL = 500
SRSR+
INPUT LEVEL (VP-P)
0200
SLEW
RATE(V/s)
600
1200
2 4 5
1813/14 G24
400
1000
800
1 3 6 7 8
TA =25CAV = 1VS = 5VRF = RG = RL = 500
SR
SR+
Slew Rate vs Temperature
Undistorted Output Swingvs Frequency
Total Harmonic Distortion + Noisevs Frequency
TEMPERATURE (C)
50200
SLEW
RATE
(V/s)
300
500
600700
50
1100
1813/14 G25
400
0 1251002525 75
800
900
1000SR+
VS = 5V
SR+ VS = 2.5V
SR VS = 2.5V
SR
VS = 5V
FREQUENCY (Hz)
10 1000.001
0.002
0.005
TOTALHARMONICDISTO
RTION+NOISE(%) 0.01
1k 10k 100k
1813/14 G26
AV = 1
AV = 1
TA = 25CVS = 5VVO = 2VP-PRL = 500
FREQUENCY (Hz)
100k
5
OUTPUTVOLT
AGE(VP-P
)
6
7
8
9
1M 10M 100M
1813/14 G27
4
3
1
0
2
AV = 1
AV = 1
VS = 5VRL = 1002% MAX DISTORTION
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TYPICAL PERFOR A CE CHARACTERISTICSUW
FREQUENCY (Hz)
100k
HARMONICDISTORTION(dB)
30
40
50
60
70
80
90
1001M 10M
1813/14 G28
AV = 2VS = 5VVO = 2VP-P
3RD HARMONICRL = 500
2ND HARMONICRL = 500
3RD HARMONICRL = 100
2ND HARMONICRL = 100
TOTAL SUPPLY VOLTAGE (V)
4
DIFFERENTIALPHASE(DEG)
DIFFERENTIALGAIN(%)
0
0.5
0.2
8 10
1813/14 G29
0.3
0.4
0.1
0
0.5
0.2
0.3
0.4
0.1
6 12
DIFFERENTIAL GAINRL = 150
DIFFERENTIAL PHASERL = 150
DIFFERENTIAL PHASERL = 1k
DIFFERENTIAL GAINRL = 1k
CAPACITIVE LOAD (pF)
10
40OVERSHOOT(%)
50
60
70
80
100 1000 10000
1813/14 G30
30
20
10
0
90
100
TA = 25CVS = 5V
AV = 1
AV = 1
2nd and 3rd Harmonic Distortionvs Frequency
Differential Gain and Phasevs Supply Voltage Capacitive Load Handling
Small-Signal Transient (AV = 1) Small-Signal Transient (AV = 1)Small-Signal Transient(AV = 1, CL = 100pF)
1813/14 G31 1813/14 G32 1813/14 G33
Large-Signal Transient (AV = 1) Large-Signal Transient (AV = 1)Large-Signal Transient(AV = 1, CL = 200pF)
1813/14 G34 1813/14 G35 1813/14 G36
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Layout and Passive Components
The LT1813/LT1814 amplifiers are more tolerant of less
than ideal board layouts than other high speed amplifiers.For optimum performance, a ground plane is recom-mended and trace lengths should be minimized, especiallyon the negative input lead.
Low ESL/ESR bypass capacitors should be placed directlyat the positive and negative supply pins (0.01F ceramicsare recommended). For high drive current applications,additional 1F to 10F tantalums should be added.
The parallel combination of the feedback resistor and gainsetting resistor on the inverting input combine with the
input capacitance to form a pole that can cause peaking oreven oscillations. If feedback resistors greater than 1k areused, a parallel capacitor of value:
CF > RG CIN/RF
should be used to cancel the input pole and optimizedynamic performance. For applications where the DCnoise gain is 1 and a large feedback resistor is used, CFshould be greater than or equal to CIN. An example wouldbe an I-to-V converter.
Input Considerations
The inputs of the LT1813/LT1814 amplifiers are con-nected to the base of an NPN and PNP bipolar transistor inparallel. The base currents are of opposite polarity andprovide first order bias current cancellation. Due tovariation in the matching of NPN and PNP beta, the polarityof the input bias current can be positive or negative. Theoffset current, however, does not depend on beta match-ing and is tightly controlled. Therefore, the use of balancedsource resistance at each input is recommended forapplications where DC accuracy must be maximized. For
example, with a 100 source resistance at each input, the400nA maximum offset current results in only 40V ofextra offset, while without balance the 4A maximuminput bias current could result in a 0.4mV offset contribu-tion.
The inputs can withstand differential input voltages of upto 6V without damage and without needing clamping or
APPLICATIO S I FOR ATIOW U UU
series resistance for protection. This differential inputvoltage generates a large internal current (up to 40mA),which results in the high slew rate. In normal transient
closed-loop operation, this does not increase power dis-sipation significantly because of the low duty cycle of thetransient inputs. Sustained differential inputs, however,will result in excessive power dissipation and thereforethis device should not be used as a comparator.
Capacitive Loading
The LT1813/LT1814 are stable with capacitive loads from0pF to 1000pF, which is outstanding for a 100MHz ampli-fier. The internal compensation circuitry accomplishes
this by sensing the load induced output pole and addingcompensation at the amplifier gain node as needed. As thecapacitive load increases, both the bandwidth and phasemargin decrease so there will be peaking in the frequencydomain and ringing in the transient response. Coaxialcable can be driven directly, but for best pulse fidelity aresistor of value equal to the characteristic impedance ofthe cable (e.g., 75) should be placed in series with theoutput. The receiving end of the cable should be termi-nated with the same value resistance to ground.
Slew Rate
The slew rate of the LT1813/LT1814 is proportional to thedifferential input voltage. Highest slew rates are thereforeseen in the lowest gain configurations. For example, a 5Voutput step in a gain of 10 has a 0.5V input step, whereasin unity gain there is a 5V input step. The LT1813/LT1814is tested for a slew rate in a gain of 1. Lower slew ratesoccur in higher gain configurations.
Power Dissipation
The LT1813/LT1814 combine two or four amplifiers with
high speed and large output drive in a small package. It ispossible to exceed the maximum junction temperaturespecification under certain conditions. Maximum junctiontemperature (TJ) is calculated from the ambient tempera-ture (TA) and power dissipation (PD) as follows:
TJ = TA + (PD JA)
8/9/2019 100MHz Operational Amplifier
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LT1813/LT1814
18134fa
APPLICATIO S I FOR ATIOW U UU
Complementary followers form an output stage that buff-ers the gain node from the load. The input resistor, inputstage transconductance, and the capacitor on the high
impedance node determine the bandwidth. The slew rateis determined by the current available to charge the gainnode capacitance. This current is the differential inputvoltage divided by R1, so the slew rate is proportional tothe input step. Highest slew rates are therefore seen in thelowest gain configurations.
The RC network across the output stage is bootstrappedwhen the amplifier is driving a light or moderate load andhas no effect under normal operation. When a heavy load(capacitive or resistive) is driven, the network is incom-
pletely bootstrapped and adds to the compensation at thehigh impedance node. The added capacitance moves theunity-gain frequency away from the pole formed by theoutput impedance and the capacitive load. The zero cre-ated by the RC combination adds phase to ensure that thetotal phase lag does not exceed 180 (zero phase margin),and the amplifier remains stable. In this way, the LT1813/LT1814 are stable with up to 1000pF capacitive loads inunity gain, and even higher capacitive loads in higherclosed-loop gain configurations.
Power dissipation is composed of two parts. The first isdue to the quiescent supply current and the second is dueto on-chip dissipation caused by the load current. The
worst-case load induced power occurs when the outputvoltage is at 1/2 of either supply voltage (or the maximumswing if less than 1/2 the supply voltage). Therefore PDMAXis:
PDMAX = (V+ V) (ISMAX) + (V
+/2)2/RL or
PDMAX = (V+ V) (ISMAX) + (V
+ VOMAX) (VOMAX/RL)
Example: LT1814S at 70C, VS = 5V, RL=100
PDMAX = (10V) (4.5mA) + (2.5V)2/100 = 108mW
TJMAX
= 70C + (4 108mW) (100C/W) = 113C
Circuit Operation
The LT1813/LT1814 circuit topology is a true voltagefeedback amplifier that has the slewing behavior of acurrent feedback amplifier. The operation of the circuit canbe understood by referring to the Simplified Schematic.Complementary NPN and PNP emitter followers buffer theinputs and drive an internal resistor. The input voltageappears across the resistor, generating current that ismirrored into the high impedance node.
SI PLIFIED SCHE ATICW W
(one amplifier)
1814 SS
OUT+IN
IN
V+
V
R1CC
RC
C
8/9/2019 100MHz Operational Amplifier
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LT1813/LT1814
18134fa
UTYPICAL APPLICATIO
FREQUENCY (MHz)
0.1
50
VOLTAGEGAIN(dB)
40
30
20
10
1 10 100
1813/14 TA02
60
70
80
90
0
10
VS = 5VVIN = 600mVP-PPEAKING < 0.12dB
4MHz, 4th Order Butterworth Filter
Filter Frequency Response
Gain of 20 Composite Amplifier Drives Differential Load with Low Distortion
+
1/2 LT1813220pF
VIN
665
232
47pF232
+
1/2 LT1813470pF
1813/14 TA01
VOUT
562
274
22pF274
+
+
+
+
1814 TA03
68pF
68pF
LOAD
800
499 499
499 4991k
9k
1k
10k
VINGAIN = 203dB BANDWIDTH = 10MHzDISTORTION = 77dB AT 2MHz,RL = 1k
1/4 LT1814
1/4 LT1814
1/4 LT1814 1/4 LT1814
8/9/2019 100MHz Operational Amplifier
14/1614
LT1813/LT1814
18134fa
UPACKAGE DESCRIPTIO
MSOP (MS8) 0802
0.53 0.015
(.021 .006)
SEATINGPLANE
NOTE:1. DIMENSIONS IN MILLIMETER/(INCH)2. DRAWING NOT TO SCALE3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.18
(.077)
0.254
(.010)
1.10
(.043)
MAX
0.22 0.38
(.009 .015)
TYP
0.13 0.076
(.005 .003)
0.86
(.034)
REF
0.65
(.0256)BSC
0 6 TYP
DETAIL A
DETAIL A
GAUGE PLANE
1 2 3 4
4.90 0.15
(1.93 .006)
8 7 6 5
3.00 0.102
(.118 .004)
(NOTE 3)
3.00 0.102
(.118 .004)
NOTE 4
0.52
(.206)REF
5.23(.206)
MIN
3.2 3.45(.126 .136)
0.889 0.127(.035 .005)
RECOMMENDED SOLDER PAD LAYOUT
0.42 0.04(.0165 .0015)
TYP
0.65(.0256)
BSC
3.00 0.10(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)2. ALL DIMENSIONS ARE IN MILLIMETERS3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE4. EXPOSED PAD SHALL BE SOLDER PLATED
0.38 0.10
BOTTOM VIEWEXPOSED PAD
1.65 0.10(2 SIDES)
0.75 0.05
R = 0.115
TYP
2.38 0.10(2 SIDES)
14
85
PIN 1TOP MARK
0.200 REF
0.00 0.05
(DD8) DFN 0203
0.28 0.05
2.38 0.05(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.65 0.05(2 SIDES)2.15 0.05
0.50BSC
0.675 0.05
3.5 0.05
PACKAGEOUTLINE
0.28 0.050.50 BSC
MS8 Package8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
DD Package8-Lead Plastic DFN (3mm 3mm)
(Reference LTC DWG # 05-08-1698)
8/9/2019 100MHz Operational Amplifier
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LT1813/LT1814
18134fa
UPACKAGE DESCRIPTIO
S Package14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
1
N
2 3 4
.150 .157
(3.810 3.988)NOTE 3
14 13
.337 .344
(8.560 8.738)NOTE 3
.228 .244
(5.791 6.197)
12 11 10 9
5 6 7
N/2
8
.016 .050
(0.406 1.270)
.010 .020
(0.254 0.508) 45
0 8 TYP
.008 .010
(0.203 0.254)
S14 0502
.053 .069
(1.346 1.752)
.014 .019
(0.355 0.483)TYP
.004 .010
(0.101 0.254)
.050
(1.270)BSC
.245MIN
N
1 2 3 N/2
.160 .005
RECOMMENDED SOLDER PAD LAYOUT
.045 .005.050 BSC
.030 .005TYP
INCHES
(MILLIMETERS)
NOTE:1. DIMENSIONS IN
2. DRAWING NOT TO SCALE3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
.016 .050
(0.406 1.270)
.010 .020
(0.254 0.508) 45
0 8 TYP.008 .010
(0.203 0.254)
SO8 0303
.053 .069(1.346 1.752)
.014 .019
(0.355 0.483)TYP
.004 .010
(0.101 0.254)
.050
(1.270)BSC
1 2 3 4
.150 .157
(3.810 3.988)
NOTE 3
8 7 6 5
.189 .197(4.801 5.004)NOTE 3
.228 .244
(5.791 6.197)
.245MIN .160 .005
RECOMMENDED SOLDER PAD LAYOUT
.045 .005.050 BSC
.030 .005TYP
INCHES
(MILLIMETERS)
NOTE:1. DIMENSIONS IN
2. DRAWING NOT TO SCALE3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
S8 Package8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
8/9/2019 100MHz Operational Amplifier
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LT1813/LT1814
18134fa
LT/TP 0503 1K REV A PRINTED IN THE USA
LinearTechnology Corporation
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1363/LT1364/LT1365 Single/Dual/Quad 70MHz, 1000V/s, C-LoadTM Op Amps 2.5V to 15V Operation
LT1395/LT1396/LT1397 Single/Dual/Quad 400MHz Current Feedback Amplifiers 4.6mA Supply Current, 800V/s, 80mA Output Current
LT1806/LT1807 Single/Dual 325MHz, 140V/ s Rail-to-Rail I/O Op Amps Low Noise 3.5nV/Hz
LT1809/LT1810 Single/Dual 180MHz, 350V/ s Rail-to-Rail I/O Op Amps Low Distortion 90dBc at 5MHz
LT1812 Single 3mA, 100MHz, 750V/ s Op Amp Single Version of LT1813/LT1814; 50A Shutdown Option
LT1815/LT1816/LT1817 Single/Dual/Quad 220MHz, 1500V/s Op Amps 6.5mA Supply Current, 6nV/ Hz Input Noise
C-Load is a trademark of Linear Technology Corporation.
UTYPICAL APPLICATIO
1813/14 TA03
VIN
TRIM R5 FOR GAINTRIM R1 FOR COMMON MODE REJECTION
BW = 1MHz
R110k R21k
R5220
R410k
R31k
VOUT
+
+
+ 1/2LT1813
1/2LT1813
Two Op Amp Instrumentation Amplifier
GN Package16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
UPACKAGE DESCRIPTIO
GN16 (SSOP) 0502
1 2 3 4 5 6 7 8
.229 .244
(5.817 6.198)
.150 .157**
(3.810 3.988)
16 15 14 13
.189 .196*
(4.801 4.978)
12 11 10 9
.016 .050
(0.406 1.270)
.015 .004
(0.38 0.10) 45
0 8 TYP.007 .0098
(0.178 0.249)
.053 .068
(1.351 1.727)
.008 .012
(0.203 0.305)
.004 .0098
(0.102 0.249)
.0250
(0.635)BSC
.009
(0.229)REF
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.150 .165
.0250 TYP.0165 .0015
.045 .005
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASHSHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEADFLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
INCHES(MILLIMETERS)
NOTE:1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
GAINR
R
R
R
R
R
R R
R=
+
+
+
+( )
=
4
31
1
2
2
1
3
4
2 3
5102