LMC7101,LMC7101Q
LMC7101/LMC7101Q Tiny Low Power Operational Amplifier with Rail-to-Rail
Input and Output
Literature Number: SNOS719E
LMC7101/LMC7101Q
June 12, 2009
Tiny Low Power Operational Amplifier with Rail-to-Rail
Input and Output
General Description
The LMC7101 is a high performance CMOS operational am-
plifier available in the space saving 5-Pin SOT23 Tiny pack-
age. This makes the LMC7101 ideal for space and weight
critical designs. The performance is similar to a single ampli-
fier of the LMC6482/LMC6484 type, with rail-to-rail input and
output, high open loop gain, low distortion, and low supply
currents.
The main benefits of the Tiny package are most apparent in
small portable electronic devices, such as mobile phones,
pagers, notebook computers, personal digital assistants, and
PCMCIA cards. The tiny amplifiers can be placed on a board
where they are needed, simplifying board layout.
Features
Tiny 5-Pin SOT23 package saves space—typical circuit
layouts take half the space of 8-Pin SOIC designs
Guaranteed specs at 2.7V, 3V, 5V, 15V supplies
Typical supply current 0.5 mA at 5V
Typical total harmonic distortion of 0.01% at 5V
1.0 MHz gain-bandwidth
Similar to popular LMC6482/LMC6484
Rail-to-rail input and output
Temperature Range –40°C to 125°C (LMC7101Q)
Applications
Mobile communications
Notebooks and PDAs
Battery powered products
Sensor interface
Automotive applications (LMC7101Q)
Connection Diagram
5-Pin SOT23
1199102
Top View
Ordering Information
Package Part Number Package
Marking
Transport Media NSC Drawing Features
5-Pin SOT23
LMC7101AIM5 A00A 1k Units on Tape and Reel
MF05A
LMC7101AIM5X 3k Units Tape and Reel
LMC7101BIM5 A00B 1k Units on Tape and Reel
LMC7101BIM5X 3k Units Tape and Reel
LMC7101QM5 AT6A 1k Units on Tape and Reel –40°C to 125°C
Operating range
LMC7101QM5X 3k Units Tape and Reel
* The LMC7101Q incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies.
© 2009 National Semiconductor Corporation 11991 www.national.com
LMC7101/LMC7101Q Tiny Low Power Operational Amplifier with Rail-to-Rail Input and Output
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance (Note 2)
Human Body Model 1000V
Machine Model 200V
Charged Device Model 1000V
Difference Input Voltage ±Supply Voltage
Voltage at Input/Output Pin (V+) + 0.3V, (V) − 0.3V
Supply Voltage (V+ − V)16V
Current at Input Pin ±5 mA
Current at Output Pin (Note 3) ±35 mA
Current at Power Supply Pin 35 mA
Lead Temp. (Soldering, 10 sec.) 260°C
Storage Temperature Range −65°C to +150°C
Junction Temperature (Note 4) 150°C
Recommended Operating
Conditions (Note 1)
Supply Voltage 2.7V V+ 15.5V
Temperature Range
LMC7101AI, LMC7101BI −40°C to 85°C
LMC7101Q −40°C to 125°C
Thermal Resistance (θJA)
5-Pin SOT23 325°C/W
2.7V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 2.7V, V = 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface
limits apply at the temperature extremes.
Symbol Parameter Conditions Typ
(Note 5)
LMC7101AI
Limit
(Note 6)
LMC7101BI
Limit
(Note 6)
LMC7101Q
Limit
(Notes 6, 10)
Units
VOS Input Offset Voltage Average Drift V+ = 2.7V 0.11 6 9 9 mV max
TCVOS Input Offset Voltage 1 μV/°C
IBInput Bias Current 1.0 64 64 1000 pA max
IOS Input Offset Current 0.5 32 32 2000 pA max
RIN Input Resistance >1 Tera Ω
CMRR Common-Mode Rejection Ratio 0V VCM 2.7V
V+ = 2.7V 70 55 50 50 dB min
VCM
Input Common Mode Voltage
Range For CMRR 50 dB 0.0 0.0 0.0 0.0 V min
3.0 2.7 2.7 2.7 V max
PSRR Power Supply Rejection Ratio
V+ = 1.35V to 1.65V
V = −1.35V to −1.65V
VCM = 0
60 50 45 45 dB min
CIN Common-Mode Input Capacitance 3 pF
VOOutput Swing
RL = 2 kΩ2.45 2.15 2.15 2.15 V min
0.25 0.5 0.5 0.5 V max
RL = 10 kΩ2.68 2.64 2.64 2.64 V min
0.025 0.06 0.06 0.06 V max
ISSupply Current 0.5 0.81
0.95
0.81
0.95
0.81
0.95
mA max
SR Slew Rate (Note 8) 0.7 V/μs
GBW Gain-Bandwidth Product 0.6 MHz
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LMC7101/LMC7101Q
3V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 3V, V = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 MΩ. Bold-
face limits apply at the temperature extremes.
Symbol Parameter Conditions Typ
(Note 5)
LMC7101AI
Limit
(Note 6)
LMC7101BI
Limit
(Note 6)
LMC7101Q
Limit
(Notes 6, 10)
Units
VOS Input Offset Voltage 0.11 4
6
7
97 mV max
TCVOS Input Offset Voltage Average Drift 1 μV/°C
IBInput Current 1.0 64 64 1000 pA max
IOS Input Offset Current 0.5 32 32 2000 pA max
RIN Input Resistance >1 Tera Ω
CMRR Common-Mode Rejection Ratio 0V VCM 3V
V+ = 3V 74 64 60 60 db min
VCM
Input Common-Mode Voltage
Range For CMRR 50 dB 0.0 0.0 0.0 0.0 V min
3.3 3.0 3.0 3.0 V max
PSRR Power Supply Rejection Ratio
V+ = 1.5V to 7.5V
V = −1.5V to −7.5V
VO = VCM = 0
80 68 60 60 dBmin
CIN Common-Mode Input Capacitance 3 pF
VOOutput Swing
RL = 2 kΩ2.8 2.6 2.6 2.6 V min
0.2 0.4 0.4 0.4 V max
RL = 600Ω 2.7 2.5 2.5 2.5 V min
0.37 0.6 0.6 0.6 V max
ISSupply Current 0.5 0.81
0.95
0.81
0.95
0.81
0.95 mA max
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LMC7101/LMC7101Q
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 5V, V = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 MΩ. Boldface
limits apply at the temperature extremes.
Symbol Parameter Conditions Typ
(Note 5)
LMC7101AI
Limit
(Note 6)
LMC7101BI
Limit
(Note 6)
LMC7101Q
Limit
(Notes 6, 10)
Units
VOS Input Offset Voltage V+ = 5V 0.11 3
5
7
9
7
9
mV max
TCVOS Input Offset Voltage Average Drift 1.0 μV/°C
IBInput Current 1 64 64 1000 pA max
IOS Input Offset Current 0.5 32 32 2000 pA max
RIN Input Resistance >1 Tera Ω
CMRR Common-Mode Rejection Ratio
0V VCM 5V
LMC7101Q @ 125°C
0.2V VCM 4.8V
82 65
60
60
55
60
55
db min
+PSRR Positive Power Supply Rejection
Ratio
V+ = 5V to 15V
V = 0V, VO = 1.5V
82 70
65
65
62
65
62
dB min
−PSRR Negative Power Supply Rejection
Ratio
V = −5V to −15V
V+ = 0V, VO = −1.5V
82 70
65
65
62
65
62
dB min
VCM
Input Common-Mode Voltage
Range
For CMRR 50 dB −0.3 −0.20
0.00
−0.20
0.00
−0.2
0.2
V min
5.3 5.20
5.00
5.20
5.00
5.2
4.8
V max
CIN Common-Mode Input Capacitance 3 pF
VOOutput Swing
RL = 2 kΩ4.9 4.7
4.6
4.7
4.6
4.7
4.54
V min
0.1 0.18
0.24
0.18
0.24
0.18
0.28
V max
RL = 600Ω 4.7 4.5
4.24
4.5
4.24
4.5
4.28
V min
0.3 0.5
0.65
0.5
0.65
0.5
0.8
V max
ISC Output Short Circuit Current
VO = 0V 24 Sourcing 24 16
11
16
11
16
9
mA min
VO = 5V Sinking 19 11
7.5
11
7.5
11
5.8
mA min
ISSupply Current 0.5 0.85
1.0
0.85
1.0
0.85
1.0
mA max
5V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 5V, V = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 MΩ. Boldface
limits apply at the temperature extremes.
Symbol Parameter Conditions Typ
(Note 5)
LMC7101AI
Limit
(Note 6)
LMC7101BI
Limit
(Note 6)
Units
THD Total Harmonic Distortion f = 10 kHz, AV = −2
RL = 10 kΩ, VO = 4.0 VPP
0.01 %
SR Slew Rate 1.0 V/μs
GBW Gain Bandwidth Product 1.0 MHz
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LMC7101/LMC7101Q
15V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 15V, V = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 MΩ.
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Typ
(Note 5)
LMC7101AI
Limit
(Note 6)
LMC7101BI
Limit
(Note 6)
LMC7101Q
Limit
(Notes 6, 10)
Units
VOS Input Offset Voltage 0.11 mV max
TCVOS Input Offset Voltage Average Drift 1.0 μV/°C
IBInput Current 1.0 64 64 1000 pA max
IOS Input Offset Current 0.5 32 32 2000 pA max
RIN Input Resistance >1 Tera Ω
CMRR Common-Mode Rejection Ratio
0V VCM 15V
LMC7101Q @°125C
0.2V VCM 14.8V
82 70
65
65
60
65
60
dB min
+PSRR Positive Power Supply Rejection
Ratio
V+ = 5V to 15V
V = 0V, VO = 1.5V
82 70
65
65
62
65
62
dB min
−PSRR Negative Power Supply Rejection
Ratio
V = −5V to −15V
V+ = 0V, VO = −1.5V
82 70
65
65
62
65
62
dB min
VCM
Input Common-Mode Voltage
Range
V+ = 5V
For CMRR 50 dB
−0.3 −0.20
0.00
−0.20
0.00
−0.2
0.2
V min
15.3 15.20
15.00
15.20
15.00
15.2
14.8
V max
AV
Large Signal Voltage Gain
(Note 7)
RL = 2 kΩ
Sourcing 340 80
40
80
40
80
30 V/mV
Sinking 24 15
10
15
10
15
4
RL = 600Ω Sourcing 300 34 34 34 V/mV
Sinking 15 6 6 6
CIN Input Capacitance 3 pF
VOOutput Swing
V+ = 15V
RL = 2 kΩ
14.7 14.4
14.2
14.4
14.2
14.4
14.2
V min
0.16 0.32
0.45
0.32
0.45
0.32
0.45
V max
V+ = 15V
RL = 600Ω
14.1 13.4
13.0
13.4
13.0
13.4
12.85
V min
0.5 1.0
1.3
1.0
1.3
1.0
1.5
V max
ISC
Output Short Circuit Current
(Note 9)
VO = 0V Sourcing 50 30
20
30
20
30
20 mA min
VO = 12V Sinking 50 30
20
30
20
30
20
ISSupply Current 0.8 1.50
1.71
1.50
1.71
1.50
1.75
mA max
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LMC7101/LMC7101Q
15V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 15V, V = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 MΩ.
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Typ
(Note 5)
LMC7101AI
Limit
(Note 6)
LMC7101BI
Limit
(Note 6)
LMC7101Q
Limit
(Notes 6, 10)
Units
SR Slew Rate
(Note 8) V+ = 15V 1.1 0.5
0.4
0.5
0.4
0.5
0.4
V/μs
min
GBW Gain-Bandwidth Product V+ = 15V 1.1 MHz
φmPhase Margin 45 deg
GmGain Margin 10 dB
enInput-Referred Voltage Noise f = 1 kHz, VCM = 1V 37
inInput-Referred Current Noise f = 1 kHz 1.5
THD Total Harmonic Distortion f = 10 kHz, AV = −2
RL = 10 kΩ, VO = 8.5 VPP
0.01 %
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human Body Model is 1.5 kΩ in series with 100 pF.
Note 3: Applies to both single-supply and split-supply operation. Continuous short operation at elevated ambient temperature can result in exceeding the maximum
allowed junction temperature at 150°C.
Note 4: The maximum power dissipation is a function of TJ(MAX), θJA and TA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) − TA)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: V+ = 15V, VCM = 1.5V and RL connect to 7.5V. For sourcing tests, 7.5V VO 12.5V. For sinking tests, 2.5V VO 7.5V.
Note 8: V+ = 15V. Connected as a voltage follower with a 10V step input. Number specified is the slower of the positive and negative slew rates. RL = 100 kΩ
connected to 7.5V. Amp excited with 1 kHz to produce VO = 10 VPP.
Note 9: Do not short circuit output to V+ when V+ is greater than 12V or reliability will be adversely affected.
Note 10: When operated at temperature between −40°C and 85°C, the LMC7101Q will meet LMC7101BI specifications.
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LMC7101/LMC7101Q
2.7V Typical Performance Characteristics V+ = 2.7V, V = 0V, TA = 25°C, unless otherwise specified.
Open Loop Frequency Response
1199116
Input Voltage vs. Output Voltage
1199117
Gain and Phase vs. Capacitance Load
1199118
Gain and Phase vs. Capacitance Load
1199119
dVOS vs. Supply Voltage
1199120
dVOS vs. Common Mode Voltage
1199121
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LMC7101/LMC7101Q
Sinking Current vs. Output Voltage
1199122
Sourcing Current vs. Output Voltage
1199123
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LMC7101/LMC7101Q
3V Typical Performance Characteristics V+ = 3V, V = 0V, TA = 25°C, unless otherwise specified.
Open Loop Frequency Response
1199124
Input Voltage vs. Output Voltage
1199125
Input Voltage Noise vs. Input Voltage
1199126
Sourcing Current vs. Output Voltage
1199127
Sinking Current vs. Output Voltage
1199128
CMRR vs. Input Voltage
1199129
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LMC7101/LMC7101Q
5V Typical Performance Characteristics V+ = 5V, V = 0V, TA = 25°C, unless otherwise specified.
Open Loop Frequency Response
1199130
Input Voltage vs. Output Voltage
1199131
Input Voltage Noise vs. Input Voltage
1199132
Sourcing Current vs, Output Voltage
1199133
Sinking Current vs. Output Voltage
1199134
CMRR vs. Input Voltage
1199135
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LMC7101/LMC7101Q
15V Typical Performance Characteristics V+ = +15V, V = 0V, TA = 25°C, unless otherwise specified.
Open Loop Frequency Response
1199136
Input Voltage vs. Output Voltage
1199137
Input Voltage Noise vs. Input Voltage
1199138
Sourcing Current vs. Output Voltage
1199139
Sinking Current vs. Output Voltage
1199140
CMRR vs. Input Voltage
1199141
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LMC7101/LMC7101Q
Supply Current vs. Supply Voltage
1199142
Input Current vs. Temperature
1199143
Output Voltage Swing vs. Supply Voltage
1199144
Input Voltage Noise vs. Frequency
1199145
Positive PSRR vs. Frequency
1199146
Negative PSRR vs. Frequency
1199147
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LMC7101/LMC7101Q
CMRR vs. Frequency
1199148
Open Loop Frequency Response @ −40°C
1199149
Open Loop Frequency Response @ 25°C
1199150
Open Loop Frequency Response @ 85°C
1199151
Maximum Output Swing vs. Frequency
1199152
Gain and Phase vs. Capacitive Load
1199153
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LMC7101/LMC7101Q
Gain and Phase vs. Capacitive Load
1199154
Output Impedance vs. Frequency
1199155
Slew Rate vs. Temperature
1199156
Slew Rate vs. Supply Voltage
1199157
Inverting Small Signal Pulse Response
1199158
Inverting Small Signal Pulse Response
1199159
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LMC7101/LMC7101Q
Inverting Small Signal Pulse Response
1199160
Inverting Large Signal Pulse Response
1199161
Inverting Large Signal Pulse Response
1199162
Inverting Large Signal Pulse Response
1199163
Non-Inverting Small Signal Pulse Response
1199164
Non-Inverting Small Signal Pulse Response
1199165
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LMC7101/LMC7101Q
Non-Inverting Small Signal Pulse Response
1199166
Non-Inverting Large Signal Pulse Response
1199167
Non-Inverting Large Signal Pulse Response
1199168
Non-Inverting Large Signal Pulse Response
1199169
Stability vs. Capacitive Load
1199170
Stability vs. Capacitive Load
1199171
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LMC7101/LMC7101Q
Stability vs. Capacitive Load
1199175
Stability vs. Capacitive Load
1199176
Stability vs. Capacitive Load
1199177
Stability vs. Capacitive Load
1199178
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LMC7101/LMC7101Q
Application Information
1.0 BENEFITS OF THE LMC7101
TINY AMP
Size
The small footprint of the SOT 23-5 packaged Tiny amp,
(0.120 x 0.118 inches, 3.05 x 3.00 mm) saves space on print-
ed circuit boards, and enable the design of smaller electronic
products. Because they are easier to carry, many customers
prefer smaller and lighter products.
Height
The height (0.056 inches, 1.43 mm) of the Tiny amp makes it
possible to use it in PCMCIA type III cards.
Signal Integrity
Signals can pick up noise between the signal source and the
amplifier. By using a physically smaller amplifier package, the
Tiny amp can be placed closer to the signal source, reducing
noise pickup and increasing signal integrity. The Tiny amp
can also be placed next to the signal destination, such as a
buffer for the reference of an analog to digital converter.
Simplified Board Layout
The Tiny amp can simplify board layout in several ways. First,
by placing an amp where amps are needed, instead of routing
signals to a dual or quad device, long pc traces may be avoid-
ed.
By using multiple Tiny amps instead of duals or quads, com-
plex signal routing and possibly crosstalk can be reduced.
Low THD
The high open loop gain of the LMC7101 amp allows it to
achieve very low audio distortion—typically 0.01% at 10 kHz
with a 10 kΩ load at 5V supplies. This makes the Tiny an
excellent for audio, modems, and low frequency signal pro-
cessing.
Low Supply Current
The typical 0.5 mA supply current of the LMC7101 extends
battery life in portable applications, and may allow the reduc-
tion of the size of batteries in some applications.
Wide Voltage Range
The LMC7101 is characterized at 15V, 5V and 3V. Perfor-
mance data is provided at these popular voltages. This wide
voltage range makes the LMC7101 a good choice for devices
where the voltage may vary over the life of the batteries.
2.0 INPUT COMMON MODE
Voltage Range
The LMC7101 does not exhibit phase inversion when an input
voltage exceeds the negative supply voltage. Figure 1 shows
an input voltage exceeding both supplies with no resulting
phase inversion of the output.
The absolute maximum input voltage is 300 mV beyond either
rail at room temperature. Voltages greatly exceeding this
maximum rating, as in Figure 2, can cause excessive current
to flow in or out of the input pins, adversely affecting reliability.
1199108
FIGURE 1. An Input Voltage Signal Exceeds the
LMC7101 Power Supply Voltages with
No Output Phase Inversion
1199109
FIGURE 2. A ±7.5V Input Signal Greatly
Exceeds the 3V Supply in Figure 3 Causing
No Phase Inversion Due to RI
Applications that exceed this rating must externally limit the
maximum input current to ±5 mA with an input resistor as
shown in Figure 3.
1199110
FIGURE 3. RI Input Current Protection for
Voltages Exceeding the Supply Voltage
3.0 RAIL-TO-RAIL OUTPUT
The approximate output resistance of the LMC7101 is 180Ω
sourcing and 130Ω sinking at VS = 3V and 110Ω sourcing and
80Ω sinking at VS = 5V. Using the calculated output resis-
tance, maximum output voltage swing can be estimated as a
function of load.
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LMC7101/LMC7101Q
4.0 CAPACITIVE LOAD TOLERANCE
The LMC7101 can typically directly drive a 100 pF load with
VS = 15V at unity gain without oscillating. The unity gain fol-
lower is the most sensitive configuration. Direct capacitive
loading reduces the phase margin of op amps. The combina-
tion of the op amp's output impedance and the capacitive load
induces phase lag. This results in either an underdamped
pulse response or oscillation.
Capacitive load compensation can be accomplished using
resistive isolation as shown in Figure 4. This simple technique
is useful for isolating the capacitive input of multiplexers and
A/D converters.
1199111
FIGURE 4. Resistive Isolation
of a 330 pF Capacitive Load
5.0 COMPENSATING FOR INPUT CAPACITANCE WHEN
USING LARGE VALUE FEEDBACK RESISTORS
When using very large value feedback resistors, (usually
> 500 kΩ) the large feed back resistance can react with the
input capacitance due to transducers, photodiodes, and cir-
cuit board parasitics to reduce phase margins.
The effect of input capacitance can be compensated for by
adding a feedback capacitor. The feedback capacitor (as in
Figure 5), Cf is first estimated by:
or
R1 CIN R2 Cf
which typically provides significant overcompensation.
Printed circuit board stray capacitance may be larger or small-
er than that of a breadboard, so the actual optimum value for
CF may be different. The values of CF should be checked on
the actual circuit. (Refer to the LMC660 quad CMOS amplifier
data sheet for a more detailed discussion.)
1199112
FIGURE 5. Cancelling the Effect of Input Capacitance
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LMC7101/LMC7101Q
SOT23-5 Tape And Reel
Specification
TAPE FORMAT
Tape Section # Cavities Cavity Status Cover Tape Status
Leader 0 (min) Empty Sealed
(Start End) 75 (min) Empty Sealed
Carrier 3000 Filled Sealed
1000 Filled Sealed
Trailer 125 (min) Empty Sealed
(Hub End) 0 (min) Empty Sealed
TAPE DIMENSIONS
1199113
8 mm 0.130 0.124 0.130 0.126 0.138 ±0.002 0.055 ±0.004 0.157 0.315 ±0.012
(3.3) (3.15) (3.3) (3.2) (3.5 ±0.05) (1.4 ±0.11) (4) (8 ±0.3)
Tape Size DIM A DIM Ao DIM B DIM Bo DIM F DIM Ko DIM P1 DIM W
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LMC7101/LMC7101Q
REEL DIMENSIONS
1199114
8 mm 7.00 0.059 0.512 0.795 2.165 0.331 + 0.059/−0.000 0.567 W1+ 0.078/−0.039
330.00 1.50 13.00 20.20 55.00 8.40 + 1.50/−0.00 14.40 W1 + 2.00/−1.00
Tape Size A B C D N W1 W2 W3
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LMC7101/LMC7101Q
Physical Dimensions inches (millimeters) unless otherwise noted
5-Pin SOT23 Package
NS Package Number MF05A
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LMC7101/LMC7101Q
Notes
23 www.national.com
LMC7101/LMC7101Q
Notes
LMC7101/LMC7101Q Tiny Low Power Operational Amplifier with Rail-to-Rail Input and Output
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