LMC7111BIM5/NOPB [TI]

LMC7111 Tiny CMOS Operational Amplifier with Rail-to-Rail Input and Output;
LMC7111BIM5/NOPB
型号: LMC7111BIM5/NOPB
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

LMC7111 Tiny CMOS Operational Amplifier with Rail-to-Rail Input and Output

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LMC7111  
www.ti.com  
SNOS753E AUGUST 1999REVISED MARCH 2013  
LMC7111 Tiny CMOS Operational Amplifier with Rail-to-Rail Input and Output  
Check for Samples: LMC7111  
1
FEATURES  
DESCRIPTION  
The LMC7111 is a micropower CMOS operational  
amplifier available in the space saving SOT-23  
package. This makes the LMC7111 ideal for space  
and weight critical designs. The wide common-mode  
input range makes it easy to design battery  
monitoring circuits which sense signals above the V+  
supply. The main benefits of the Tiny package are  
most apparent in small portable electronic devices,  
such as mobile phones, pagers, and portable  
computers. The tiny amplifiers can be placed on a  
board where they are needed, simplifying board  
layout.  
2
Tiny 5-Pin SOT-23 Package Saves Space  
Very Wide Common Mode Input Range  
Specified at 2.7V, 5V, and 10V  
Typical Supply Current 25 μA at 5V  
50 kHz Gain-Bandwidth at 5V  
Similar to Popular LMC6462  
Output to Within 20 mV of Supply Rail at 100k  
Load  
Good Capacitive Load Drive  
APPLICATIONS  
Mobile Communications  
Portable Computing  
Current Sensing for Battery Chargers  
Voltage Reference Buffering  
Sensor Interface  
Stable Bias for GaAs RF Amps  
Connection Diagram  
Figure 1. 8-Pin PDIP  
Top View  
Figure 2. 5-Pin SOT-23  
Top View  
Figure 3. Actual Size  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2013, Texas Instruments Incorporated  
LMC7111  
SNOS753E AUGUST 1999REVISED MARCH 2013  
www.ti.com  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
(1)(2)  
Absolute Maximum Ratings  
ESD Tolerance  
(3)  
SOT-23 Package  
PDIP Package  
2000V  
1500V  
Differential Input Voltage  
Voltage at Input/Output Pin  
Supply Voltage (V+ V)  
Current at Input Pin  
±Supply Voltage  
(V+) + 0.3V, (V) 0.3V  
11V  
±5 mA  
(4)  
Current at Output Pin  
±30 mA  
Current at Power Supply Pin  
Lead Temp. (Soldering, 10 sec.)  
Storage Temperature Range  
30 mA  
260°C  
65°C to +150°C  
150°C  
(5)  
Junction Temperature  
(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 ensured. For ensured specifications and the test  
conditions, see the Electrical Characteristics.  
(2) If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.  
(3) Human Body Model is 1.5 kΩ in series with 100 pF.  
(4) Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in  
exceeding the maximum allowed junction temperature at 150°C.  
(5) 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.  
(1)  
Operating Ratings  
Supply Voltage  
2.5V V+ 11V  
40°C TJ +85°C  
115°C/W  
Junction Temperature Range  
LMC7111AI, LMC7111BI  
8-Pin PDIP  
Thermal Resistance (θJA  
)
5-Pin SOT-23  
325°C/W  
(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 specified. For ensured specifications and the test  
conditions, see the Electrical Characteristics.  
2.7V DC Electrical Characteristics  
Unless otherwise specified, all limits specified 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  
V+ = 2.7V  
LMC7111AI  
Limit(2)  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
0.9  
VOS  
Input Offset Voltage  
3
7
mV  
5
9
max  
TCVOS  
IB  
Input Offset Voltage  
Average Drift  
2.0  
0.1  
μV/°C  
(3)  
(3)  
Input Bias Current  
Input Offset Current  
Input Resistance  
See  
See  
1
20  
1
20  
pA  
max  
IOS  
0.01  
0.5  
10  
0.5  
10  
pA  
max  
RIN  
>10  
60  
Tera Ω  
+PSRR  
Positive Power Supply  
Rejection Ratio  
2.7V V+ 5.0V,  
55  
50  
55  
50  
dB  
min  
V= 0V, VO = 2.5V  
PSRR  
Negative Power Supply  
Rejection Ratio  
2.7V V≤−5.0V,  
60  
55  
50  
55  
50  
dB  
min  
V= 0V, VO = 2.5V  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
(3) Bias Current specified by design and processing.  
2
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LMC7111  
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SNOS753E AUGUST 1999REVISED MARCH 2013  
2.7V DC Electrical Characteristics (continued)  
Unless otherwise specified, all limits specified 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  
V+ = 2.7V  
LMC7111AI  
Limit(2)  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
VCM  
Input Common-Mode  
Voltage Range  
0.10  
2.8  
3
0.0  
0.40  
0.0  
0.40  
V
min  
For CMRR 50 dB  
2.7  
2.25  
2.7  
2.25  
V
max  
CIN  
VO  
Common-Mode Input  
Capacitance  
pF  
Output Swing  
V+ = 2.7V  
RL = 100 kΩ  
2.69  
0.01  
2.65  
0.03  
7
2.68  
2.4  
2.68  
2.4  
V
min  
0.02  
0.08  
0.02  
0.08  
V
max  
V+ = 2.7V  
RL = 10 kΩ  
2.6  
2.4  
2.6  
2.4  
V
min  
0.1  
0.3  
0.1  
0.3  
V
max  
ISC  
AVOL  
IS  
Output Short Circuit Current  
Voltage Gain  
Sourcing, VO = 0V  
Sinking, VO = 2.7V  
Sourcing  
1
0.7  
1
0.7  
mA  
min  
7
1
0.7  
1
0.7  
mA  
min  
400  
150  
20  
V/mv  
min  
Sinking  
V/mv  
min  
Supply Current  
V+ = +2.7V,  
VO = V+/2  
45  
60  
50  
65  
μA  
max  
2.7V AC Electrical Characteristics  
Unless otherwise specified, all limits specified 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  
LMC7111AI  
Limit  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
(2)  
(3)  
SR  
GBW  
Slew Rate  
Gain-Bandwidth Product  
See  
0.015  
40  
V/μs  
kHz  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
(3) Connected as Voltage Follower with 1.0V step input. Number specified is the slower of the positive and negative slew rates. Input  
referred, V+ = 2.7V and RL = 100 kΩ connected to 1.35V. Amp excited with 1 kHz to produce VO = 1 VPP  
.
3V DC Electrical Characteristics  
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 3V, V= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Conditions  
LMC7111AI  
Limit(2)  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
VCM  
Input Common-Mode  
Voltage Range  
V+ = 3V  
For CMRR 50 dB  
0.25  
0.0  
0.0  
V
min  
3.2  
3.0  
3.0  
V
2.8  
2.8  
max  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
Copyright © 1999–2013, Texas Instruments Incorporated  
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3.3V DC Electrical Characteristics  
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 3.3V, V= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Conditions  
LMC7111AI  
Limit  
LMC7111BI  
Limit  
Units  
Typ(1)  
(2)  
(2)  
VCM  
Input Common-Mode  
Voltage Range  
V+ = 3.3V  
For CMRR 50 dB  
0.25  
0.1  
0.00  
0.1  
0.00  
V
min  
3.5  
3.4  
3.4  
V
3.2  
3.2  
max  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
5V DC Electrical Characteristics  
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 5V, V= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Conditions  
LMC7111AI  
Limit(2)  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
VOS  
Input Offset Voltage  
V+ = 5V  
0.9  
mV  
max  
TCVOS  
IB  
Input Offset Voltage  
Average Drift  
2.0  
0.1  
μV/°C  
Input Bias Current  
Input Offset Current  
Input Resistance  
See(3)  
1
20  
1
20  
pA  
max  
(3)  
IOS  
See  
0.01  
0.5  
10  
0.5  
10  
pA  
max  
RIN  
>10  
85  
Tera Ω  
CMRR  
Common Mode  
Rejection Ratio  
0V VCM 5V  
70  
70  
70  
60  
60  
60  
dB  
min  
+PSRR  
PSRR  
VCM  
Positive Power Supply  
Rejection Ratio  
5V V+ 10V,  
85  
85  
dB  
min  
V= 0V, VO = 2.5V  
Negative Power Supply  
Rejection Ratio  
5V V≤−10V,  
dB  
min  
V= 0V, VO = 2.5V  
Input Common-Mode  
Voltage Range  
V+ = 5V  
For CMRR 50 dB  
0.3  
5.25  
3
0.20  
0.00  
0.20  
0.00  
V
min  
5.20  
5.00  
5.20  
5.00  
V
max  
CIN  
VO  
Common-Mode Input  
Capacitance  
pF  
Output Swing  
V+ = 5V  
RL = 100 kΩ  
4.99  
0.01  
4.98  
0.02  
7
4.98  
0.02  
4.9  
4.98  
0.02  
4.9  
Vmin  
Vmax  
Vmin  
Vmin  
V+ = 5V  
RL = 10 kΩ  
0.1  
0.1  
ISC  
AVOL  
IS  
Output Short Circuit Current  
Voltage Gain  
Sourcing, VO = 0V  
Sinking, VO = 3V  
Sourcing  
5
3.5  
5
3.5  
mA  
min  
7
5
3.5  
5
3.5  
mA  
min  
500  
200  
25  
V/mv  
min  
Sinking  
V/mv  
min  
Supply Current  
V+ = +5V,  
VO = V+/2  
μA  
max  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
(3) Bias Current specified by design and processing.  
4
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LMC7111  
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SNOS753E AUGUST 1999REVISED MARCH 2013  
5V AC Electrical Characteristics  
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 5V, V= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Conditions  
LMC7111AI  
Limit(2)  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
SR  
GBW  
Slew Rate  
Gain-Bandwidth Product  
Positive Going Slew Rate(3)  
0.027  
50  
0.015  
0.010  
V/μs  
kHz  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
(3) Connected as Voltage Follower with 1.0V step input. Number specified is the slower of the positive slew rate. The negative slew rate is  
faster. Input referred, V+ = 5V and RL = 100 kΩ connected to 1.5V. Amp excited with 1 kHz to produce VO = 1 VPP  
.
10V DC Electrical Characteristics  
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 10V, V= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Conditions  
V+ = 10V  
LMC7111AI  
Limit  
LMC7111BI  
Limit(2)  
Units  
(1)  
Typ  
(2)  
VOS  
Input Offset Voltage  
0.9  
3
7
mV  
5
9
max  
TCVOS  
IB  
Input Offset Voltage  
Average Drift  
2.0  
0.1  
μV/°C  
Input Bias Current  
Input Offset Current  
Input Resistance  
1
20  
1
20  
pA  
max  
IOS  
0.01  
0.5  
10  
0.5  
10  
pA  
max  
RIN  
>10  
80  
Tera Ω  
+PSRR  
Positive Power Supply  
Rejection Ratio  
5V V+ 10V,  
dB  
min  
V= 0V, VO = 2.5V  
PSRR  
Negative Power Supply  
Rejection Ratio  
5V V≤−10V,  
80  
0.2  
10.2  
3
dB  
min  
V= 0V, VO = 2.5V  
VCM  
Input Common-Mode  
Voltage Range  
V+ = 10V  
For CMRR 50 dB  
0.15  
0.00  
0.15  
0.00  
V
min  
10.15  
10.00  
10.15  
10.00  
V
max  
CIN  
ISC  
Common-Mode Input  
Capacitance  
pF  
(3)  
Output Short Circuit Current  
Sourcing, VO = 0V  
Sinking, VO = 10V  
Sourcing  
30  
20  
7
20  
7
mA  
min  
30  
20  
7
20  
7
mA  
min  
AVOL  
Voltage Gain  
100 kΩ Load  
500  
200  
25  
V/mv  
min  
Sinking  
V/mv  
min  
IS  
Supply Current  
Output Swing  
V+ = +10V,  
VO = V+/2  
V+ = 10V  
50  
65  
60  
75  
μA  
max  
VO  
9.99  
0.01  
9.98  
0.02  
9.98  
0.02  
9.9  
9.98  
0.02  
9.9  
Vmin  
Vmax  
Vmin  
Vmin  
RL = 100 kΩ  
V+ = 10V  
RL = 10 kΩ  
0.1  
0.1  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
(3) Bias Current specified by design and processing.  
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10V AC Electrical Characteristics  
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 10V, V= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Conditions  
LMC7111AI  
Limit(2)  
LMC7111BI  
Limit(2)  
Units  
Typ(1)  
(3)  
SR  
Slew Rate  
See  
0.03  
50  
V/μs  
kHz  
deg  
dB  
GBW  
φm  
Gain-Bandwidth Product  
Phase Margin  
50  
Gm  
Gain Margin  
15  
Input-Referred  
Voltage Noise  
f = 1 kHz  
VCM = 1V  
110  
nV/ Hz  
pA/Hz  
Input-Referred  
Current Noise  
f = 1 kHz  
0.03  
(1) Typical Values represent the most likely parametric norm.  
(2) All limits are specified by testing or statistical analysis.  
(3) Connected as Voltage Follower with 1.0V step input. Number specified is the slower of the positive and negative slew rates. Input  
referred, V+ = 10V and RL = 100 kΩ connected to 5V. Amp excited with 1 kHz to produce VO = 2 VPP  
.
6
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Typical Performance Characteristics  
TA = 25°C unless specified, Single Supply  
Supply Current  
vs.  
Supply Voltage  
Voltage Noise  
vs.  
Frequency  
Figure 4.  
Figure 5.  
2.7V Performance  
Offset Voltage  
vs.  
Common Mode Voltage @ 2.7V  
Sinking Output  
vs.  
Output Voltage  
Figure 6.  
Figure 7.  
Sourcing Output  
vs.  
Output Voltage  
Gain and Phase  
vs.  
Capacitive Load @ 2.7V  
Figure 8.  
Figure 9.  
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2.7V Performance (continued)  
Gain and Phase  
vs.  
Capacitive Load @ 2.7V  
Gain and Phase  
vs.  
Capacitive Load @ 2.7V  
Figure 10.  
Figure 11.  
3V Performance  
Voltage Noise  
vs.  
Common Mode Voltage @ 3V  
Output Voltage  
vs.  
Input Voltage @ 3V  
Figure 12.  
Figure 13.  
Offset Voltage  
vs.  
Common Mode Voltage @ 3V  
Sourcing Output  
vs.  
Output Voltage  
Figure 14.  
Figure 15.  
8
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3V Performance (continued)  
Sinking Output  
vs.  
Output Voltage  
Gain and Phase  
vs.  
Capacitive Load @ 3V  
Figure 16.  
Figure 17.  
Gain and Phase  
vs.  
Capacitive Load @ 3V  
Gain and Phase  
vs.  
Capacitive Load @ 3V  
Figure 18.  
Figure 19.  
5V Performance  
Voltage Noise  
vs.  
Common Mode Voltage @ 5V  
Output Voltage  
vs.  
Input Voltage @ 5V  
Figure 20.  
Figure 21.  
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5V Performance (continued)  
Offset Voltage  
vs.  
Sourcing Output  
vs.  
Output Voltage  
Common Mode Voltage @ 5V  
Figure 22.  
Figure 23.  
Sinking Output  
vs.  
Output Voltage  
Gain and Phase  
vs.  
Capacitive Load @ 5V  
Figure 24.  
Figure 25.  
Gain and Phase  
vs.  
Capacitive Load @ 5V  
Gain and Phase  
vs.  
Capacitive Load @ 5V  
Figure 26.  
Figure 27.  
10  
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5V Performance (continued)  
Non-Inverting  
Non-Inverting  
Small Signal Pulse Response  
at 5V  
Small Signal Pulse Response  
at 5V  
Figure 28.  
Figure 29.  
Non-Inverting  
Small Signal Pulse Response  
at 5V  
Non-Inverting  
Large Signal Pulse Response  
at 5V  
Figure 30.  
Figure 31.  
Non-Inverting  
Large Signal Pulse Response  
at 5V  
Non-Inverting  
Large Signal Pulse Response  
at 5V  
Figure 32.  
Figure 33.  
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5V Performance (continued)  
Inverting  
Inverting  
Small Signal Pulse Response  
at 5V  
Small Signal Pulse Response  
at 5V  
Figure 34.  
Figure 35.  
Inverting  
Small Signal Pulse Response  
at 5V  
Inverting  
Large Signal Pulse Response  
at 5V  
Figure 36.  
Figure 37.  
Inverting  
Large Signal Pulse Response  
at 5V  
Inverting  
Large Signal Pulse Response  
at 5V  
Figure 38.  
Figure 39.  
12  
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10V Performance  
Voltage Noise  
vs.  
Common Mode Voltage @ 10V  
Output Voltage  
vs.  
Input Voltage @ 10V  
Figure 40.  
Figure 41.  
Offset Voltage  
vs.  
Common Mode Voltage @ 10V  
Sourcing Output  
vs.  
Output Voltage  
Figure 42.  
Figure 43.  
Sinking Output  
vs.  
Output Voltage  
Gain and Phase  
vs.  
Capacitive Load @ 10V  
Figure 44.  
Figure 45.  
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10V Performance (continued)  
Gain and Phase  
vs.  
Gain and Phase  
vs.  
Capacitive Load @ 10V  
Capacitive Load @ 10V  
Figure 46.  
Figure 47.  
Non-Inverting  
Small Signal Pulse Response  
at 10V  
Non-Inverting  
Large Signal Pulse Response  
at 10V  
Figure 48.  
Figure 49.  
Inverting  
Small Signal Pulse Response  
at 10V  
Inverting  
Large Signal Pulse Response  
at 10V  
Figure 50.  
Figure 51.  
14  
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Product Folder Links: LMC7111  
LMC7111  
www.ti.com  
SNOS753E AUGUST 1999REVISED MARCH 2013  
APPLICATION INFORMATION  
BENEFITS OF THE LMC7111 TINY AMP  
Size  
The small footprint of the SOT-23 packaged Tiny amp, (0.120 x 0.118 inches, 3.05 x 3.00 mm) saves space on  
printed 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 avoided.  
By using multiple Tiny amps instead of duals or quads, complex signal routing and possibly crosstalk can be  
reduced.  
DIPs available for prototyping  
LMC7111 amplifiers packaged in conventional 8-pin dip packages can be used for prototyping and evaluation  
without the need to use surface mounting in early project stages.  
Low Supply Current  
The typical 25 μA supply current of the LMC7111 extends battery life in portable applications, and may allow the  
reduction of the size of batteries in some applications.  
Wide Voltage Range  
The LMC7111 is characterized at 2.7V, 3V, 3.3V, 5V and 10V. Performance data is provided at these popular  
voltages. This wide voltage range makes the LMC7111 a good choice for devices where the voltage may vary  
over the life of the batteries.  
INPUT COMMON MODE VOLTAGE RANGE  
The LMC7111 does not exhibit phase inversion when an input voltage exceeds the negative supply voltage.  
The absolute maximum input voltage is 300 mV beyond either rail at room temperature. Voltages greatly  
exceeding this maximum rating can cause excessive current to flow in or out of the input pins, adversely affecting  
reliability.  
Applications that exceed this rating must externally limit the maximum input current to ±5 mA with an input  
resistor as shown in Figure 52.  
Figure 52. RI Input Current Protection for  
Voltages Exceeding the Supply Voltage  
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CAPACITIVE LOAD TOLERANCE  
The LMC7111 can typically directly drive a 300 pF load with VS = 10V at unity gain without oscillating. The unity  
gain follower is the most sensitive configuration. Direct capacitive loading reduces the phase margin of op-amps.  
The combination 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 53. This simple  
technique is useful for isolating the capacitive input of multiplexers and A/D converters.  
Figure 53. Resistive Isolation  
of a 330 pF Capacitive Load  
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 circuit 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 54), Cf is first estimated by:  
(1)  
or  
R1 CIN R2 Cf  
(2)  
which typically provides significant overcompensation.  
Printed circuit board stray capacitance may be larger or smaller 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.)  
Figure 54. Cancelling the Effect of Input Capacitance  
OUTPUT SWING  
The output of the LMC7111 will go to within 100 mV of either power supply rail for a 10 kΩ load and to 20 mV of  
the rail for a 100 kΩ load. This makes the LMC7111 useful for driving transistors which are connected to the  
same power supply. By going very close to the supply, the LMC7111 can turn the transistors all the way on or all  
the way off.  
16  
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LMC7111  
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SNOS753E AUGUST 1999REVISED MARCH 2013  
BIASING GaAs RF AMPLIFIERS  
The capacitive load capability, low current draw, and small size of the SOT-23 LMC7111 make it a good choice  
for providing a stable negative bias to other integrated circuits.  
The very small size of the LMC7111 and the LM4040 reference take up very little board space.  
CF and Risolation prevent oscillations when driving capacitive loads.  
Figure 55. Stable Negative Bias  
REFERENCE BUFFER FOR A-TO-D CONVERTERS  
The LMC7111 can be used as a voltage reference buffer for analog-to-digital converters. This works best for A-  
to-D converters whose reference input is a static load, such as dual slope integrating A-to-Ds. Converters whose  
reference input is a dynamic load (the reference current changes with time) may need a faster device, such as  
the LMC7101 or the LMC7131.  
The small size of the LMC7111 allows it to be placed close to the reference input. The low supply current (25 μA  
typical) saves power.  
For A-to-D reference inputs which require higher accuracy and lower offset voltage, please see the LMC6462  
datasheet. The LMC6462 has performance similar to the LMC7111. The LMC6462 is available in two grades with  
reduced input voltage offset.  
DUAL AND QUAD DEVICES WITH SIMILAR PERFORMANCE  
The LMC6462 and LMC6464 are dual and quad devices with performance similar to the LMC7111. They are  
available in both conventional through-hole and surface mount packaging. Please see the LMC6462/4 datasheet  
for details.  
SPICE MACROMODEL  
A SPICE macromodel is available for the LMC7111. This model includes simulation of:  
Input common-mode voltage range  
Frequency and transient response  
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Quiescent and dynamic supply current  
Output swing dependence on loading conditions and many more characteristics as listed on the macro model  
disk. Visit the LMC7111 product page on http://www.ti.com for the spice model.  
ADDITIONAL SOT-23 TINY DEVICES  
Additional parts are available in the space saving SOT-23 Tiny package, including amplifiers, voltage references,  
and voltage regulators. These devices include—  
LMC7101 1 MHz gain-bandwidth rail-to-rail input and output amplifier—high input impedance and high gain, 700  
μA typical current 2.7V, 3V, 5V and 15V specifications.  
LM7131 Tiny Video amp with 70 MHz gain bandwidth. Specified at 3V, 5V and ± 5V supplies.  
LMC7211 Comparator in a tiny package with rail-to-rail input and push-pull output. Typical supply current of 7  
μA. Typical propagation delay of 7 μs. Specified at 2.7V, 5V and 15V supplies.  
LMC7221 Comparator with an open drain output for use in mixed voltage systems. Similar to the LMC7211,  
except the output can be used with a pull-up resistor to a voltage different than the supply voltage.  
LP2980 Micropower SOT 50 mA Ultra Low-Dropout Regulator.  
LM4040 Precision micropower shunt voltage reference. Fixed voltages of 2.5000V, 4.096V, 5.000V, 8.192V and  
10.000V.  
LM4041 Precision micropower shunt voltage reference 1.225V and adjustable.  
Visit http://www.ti.com for more information.  
18  
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LMC7111  
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SNOS753E AUGUST 1999REVISED MARCH 2013  
REVISION HISTORY  
Changes from Revision D (March 2013) to Revision E  
Page  
Changed layout of National Data Sheet to TI format .......................................................................................................... 18  
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PACKAGE OPTION ADDENDUM  
www.ti.com  
11-Apr-2013  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
Top-Side Markings  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4)  
LMC7111BIM5  
ACTIVE  
SOT-23  
SOT-23  
DBV  
5
5
1000  
TBD  
Call TI  
CU SN  
Call TI  
-40 to 85  
-40 to 85  
A01B  
LMC7111BIM5/NOPB  
ACTIVE  
DBV  
1000  
Green (RoHS  
& no Sb/Br)  
Level-1-260C-UNLIM  
A01B  
LMC7111BIM5X  
ACTIVE  
ACTIVE  
SOT-23  
SOT-23  
DBV  
DBV  
5
5
3000  
3000  
TBD  
Call TI  
CU SN  
Call TI  
-40 to 85  
-40 to 85  
A01B  
A01B  
LMC7111BIM5X/NOPB  
Green (RoHS  
& no Sb/Br)  
Level-1-260C-UNLIM  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability  
information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that  
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight  
in homogeneous material)  
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4)  
Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a  
continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
11-Apr-2013  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
26-Mar-2013  
TAPE AND REEL INFORMATION  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
LMC7111BIM5  
LMC7111BIM5/NOPB  
LMC7111BIM5X  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
1000  
1000  
3000  
3000  
178.0  
178.0  
178.0  
178.0  
8.4  
8.4  
8.4  
8.4  
3.2  
3.2  
3.2  
3.2  
3.2  
3.2  
3.2  
3.2  
1.4  
1.4  
1.4  
1.4  
4.0  
4.0  
4.0  
4.0  
8.0  
8.0  
8.0  
8.0  
Q3  
Q3  
Q3  
Q3  
LMC7111BIM5X/NOPB SOT-23  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
26-Mar-2013  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
LMC7111BIM5  
LMC7111BIM5/NOPB  
LMC7111BIM5X  
SOT-23  
SOT-23  
SOT-23  
SOT-23  
DBV  
DBV  
DBV  
DBV  
5
5
5
5
1000  
1000  
3000  
3000  
210.0  
210.0  
210.0  
210.0  
185.0  
185.0  
185.0  
185.0  
35.0  
35.0  
35.0  
35.0  
LMC7111BIM5X/NOPB  
Pack Materials-Page 2  
IMPORTANT NOTICE  
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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms  
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary  
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TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and  
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