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LMC7101 Tiny Low Power Operational Amplifier with Rail-To-Rail Input and Output
September 1999
LMC7101 Tiny Low Power Operational Amplifier with Rail-To-Rail Input and Output
General Description
The LMC7101 is a high performance CMOS operational amplifier available in the space saving SOT 23-5 Tiny package. This makes the LMC7101 ideal for space and weight critical designs. The performance is similar to a single amplifier of the LMC6482/4 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
n Tiny SOT23-5 package saves space -- typical circuit layouts take half the space of SO-8 designs n Guaranteed specs at 2.7V, 3V, 5V, 15V supplies n Typical supply current 0.5 mA at 5V n Typical total harmonic distortion of 0.01% at 5V n 1.0 MHz gain-bandwidth n Similar to popular LMC6482/4 n Input common-mode range includes V- and V+ n Tiny package outside dimensions -- 120 x 118 x 56 mils, 3.05 x 3.00 x 1.43 mm
Applications
n n n n Mobile communications Notebooks and PDAs Battery powered products Sensor interface
Connection Diagram
5-Pin SOT23-5
DS011991-2
Top View Package Ordering Information LMC7101AIM5 5-Pin SOT 23-5 LMC7101AIM5X LMC7101BIM5 LMC7101BIM5X NSC Drawing Number MA05A MA05A MA05A MA05A Package Marking A00A A00A A00B A00B Supplied As 1k Units on Tape and Reel 3k Units Tape and Reel 1k Units on Tape and Reel 3k Units Tape and Reel
(c) 2000 National Semiconductor Corporation
DS011991
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LMC7101
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) Difference Input Voltage Voltage at Input/Output Pin Supply Voltage (V+ - V-) Current at Input Pin Current at Output Pin (Note 3) Current at Power Supply Pin Lead Temp. (Soldering, 10 sec.) 2000V
Storage Temperature Range Junction Temperature (Note 4)
-65C to +150C 150C
Recommended Operating Conditions (Note 1)
Supply Voltage Junction Temperature Range LMC7101AI, LMC7101BI Thermal Resistance (JA) M05A Package, 5-Pin Surface Mt. 2.7V V+ 15.5V -40C TJ +85C 325C/W
Supply Voltage
(V+) + 0.3V, (V-) - 0.3V 16V 5 mA 35 mA 35 mA 260C
2.7V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 2.7V, V- = 0V, VCM = VO = V+/2 and RL > 1 M. Boldface limits apply at the temperature extremes. Typ Symbol VOS TCVOS IB IOS RIN CMRR VCM Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Input Resistance Common-Mode Rejection Ratio Input Common-Mode Voltage Range 0V VCM 2.7V V+ = 2.7V V+ = V For CMRR 50 dB 3.0 PSRR Power Supply Rejection Ratio CIN VO Common-Mode Input Capacitance Output Swing RL = 2 k RL = 10 k IS SR GBW Supply Current Slew Rate Gain-Bandwidth Product (Note 8) 2.45 0.25 2.68 0.025 0.5 0.7 0.6 2.15 0.5 2.64 0.06 0.81 0.95 2.15 0.5 2.64 0.06 0.81 0.95 V min V max V min V max mA max V/s MHz V+ = 1.35V to 1.65V V = -1.35V to -1.65V VCM = 0 3 pF
-
LMC7101AI Limit (Note 6) 6
LMC7101BI Limit (Note 6) 9 mV max V/C Units
Conditions V+ = 2.7V
(Note 5) 0.11 1 1.0 0.5
64 32 55 0.0 2.7
64 32 50 0.0 2.7
pA max pA max Tera dB min V min V max dB
>1
70 0.0
60
50
45
min
3V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 3V, V- = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 M. Boldface limits apply at the temperature extremes. Typ Symbol VOS
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LMC7101AI Limit (Note 6) 4
LMC7101BI Limit (Note 6) 7 mV Units
Parameter Input Offset Voltage
Conditions
(Note 5) 0.11
2
LMC7101
3V DC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 3V, V- = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 M. Boldface limits apply at the temperature extremes. Typ Symbol Parameter Conditions (Note 5) LMC7101AI Limit (Note 6) 6 TCVOS IB IOS RIN CMRR VCM Input Offset Voltage Average Drift Input Current Input Offset Current Input Resistance Common-Mode Rejection Ratio Input Common-Mode Voltage Range For CMRR 50 dB 3.3 PSRR Power Supply Rejection Ratio CIN VO Common-Mode Input Capacitance Output Swing RL = 2 k RL = 600 IS Supply Current 2.8 0.2 2.7 0.37 0.5 2.6 0.4 2.5 0.6 0.81 0.95 2.6 0.4 2.5 0.6 0.81 0.95 V min V max V min V max mA max V+ = 1.5V to 7.5V V- = -1.5V to -7.5V VO = VCM = 0 3 pF 80 68 60 3.0 3.0 0V VCM 3V V = 3V 0.0 0.0 0.0
+
LMC7101BI Limit (Note 6) 9 max V/C Units
1 1.0 0.5 64 32 64 64 32 60
pA max pA max Tera db min V min V max dB min
>1
74
3
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LMC7101
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 5V, V- = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 M. Boldface limits apply at the temperature extremes. Typ Symbol VOS TCVOS IB IOS RIN CMRR +PSRR -PSRR VCM Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Current Input Offset Current Input Resistance Common-Mode Rejection Ratio Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Input Common-Mode Voltage Range 5.3 CIN VO Common-Mode Input Capacitance Output Swing RL = 2 k 4.9 0.1 RL = 600 4.7 0.3 ISC Output Short Circuit Current Sinking, VO = 5V IS Supply Current 19 0.5 Sourcing, VO = 0V 24 4.7 4.6 0.18 0.24 4.5 4.24 0.5 0.65 16 11 11 7.5 0.85 1.0 4.7 4.6 0.18 0.24 4.5 4.24 0.5 0.65 16 11 11 7.5 0.85 1.0 V min V max V min V max mA min mA min mA max 3 V+ = 5V to 15V V- = 0V, VO = 1.5V V- = -5V to -15V V+ = 0V, VO = -1.5V For CMRR 50 dB -0.3 82 82 0V VCM 5V 1 0.5 64 32 65 60 70 65 70 65 -0.20 0.00 5.20 5.00 64 32 60 55 65 62 65 62 -0.20 0.00 5.20 5.00 pA max pA max Tera db min dB min dB min V min V max pF Conditions V+ = 5V (Note 5) 0.11 1.0 LMC7101AI Limit (Note 6) 3 5 LMC7101BI Limit (Note 6) 7 9 mV max V/C Units
>1
82
5V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 5V, V- = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 M. Boldface limits apply at the temperature extremes. Typ Symbol T.H.D. SR GBW Parameter Total Harmonic Distortion Slew Rate Gain__Bandwidth Product Conditions F = 10 kHz, AV = -2 RL = 10 k, VO = 4.0 VPP 1.0 1.0 V/s MHz (Note 5) 0.01 LMC7101AI Limit (Note 6) LMC7101BI Limit (Note 6) % Units
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LMC7101
15V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 15V, V- = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 M. Boldface limits apply at the temperature extremes. Typ Symbol VOS TCVOS IB IOS RIN CMRR +PSRR -PSRR VCM Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Current Input Offset Current Input Resistance Common-Mode Rejection Ratio Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Input Common-Mode Voltage Range V+ = 5V to 15V V- = 0V, VO = 1.5V V- = -5V to -15V V = 0V, VO = -1.5V V+ = 5V For CMRR 50 dB 15.3 AV Large Signal Voltage Gain RL = 2 k (Note 7) Sinking RL = 600 (Note 7) CIN VO Input Capacitance Output Swing V+ = 15V RL = 2 k 0.16 V+ = 15V RL = 600 0.5 ISC Output Short Circuit Current Sourcing, VO = 0V (Note 9) Sinking, VO = 12V (Note 9) IS Supply Current 0.8 50 50 14.1 Sourcing Sinking 24 300 15 3 14.7 14.4 14.2 0.32 0.45 13.4 13.0 1.0 1.3 30 20 30 20 1.50 1.71 14.4 14.2 0.32 0.45 13.4 13.0 1.0 1.3 30 20 30 20 1.50 1.71 Sourcing 340 -0.3
+
LMC7101AI Limit (Note 6)
LMC7101BI Limit (Note 6) mV max V/C Units
Conditions
(Note 5) 0.11 1.0 1.0 0.5
64 32 70 65 70 65 70 65 -0.20 0.00 15.20 15.00 80 40 15 10 34 6
64 32 65 60 65 62 65 62 -0.20 0.00 15.20 15.00 80 40 15 10 34 6
pA max pA max Tera dB min dB min dB min V min V max V/mV
>1
0V VCM 15V 82 82 82
V/mV pF V min V max V min V max mA min mA min mA max
5
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LMC7101
15V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 15V, V- = 0V, VCM = 1.5V, VO = V+/2 and RL = 1 M. Boldface limits apply at the temperature extremes. Typ Symbol SR GBW m Gm en in T.H.D. Parameter Slew Rate Gain-Bandwidth Product Phase Margin Gain Margin Input-Referred Voltage Noise Input-Referred Current Noise Total Harmonic Distortion F = 10 kHz, AV = -2 RL = 10 k, VO = 8.5 VPP
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, 1.5 k 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 150C. Note 4: The maximum power dissipation is a function of TJ(max), JA and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(max) - TA)/JA. 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 k 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.
LMC7101AI Limit (Note 6) 0.5 0.4
LMC7101BI Limit (Note 6) 0.5 0.4 V/s min MHz Deg dB Units
Conditions V+ = 15V (Note 8) V+ = 15V
(Note 5) 1.1 1.1 45 10
F = 1 kHz VCM = 1V F = 1 kHz
37
1.5 0.01 %
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LMC7101
Typical Performance Characteristics 2.7V PERFORMANCE
Open Loop Frequency Response (2.7V)
VS = +15V, Single Supply, TA = 25C unless specified
Input Voltage vs Output Voltage (2.7V)
Gain and Phase vs Capacitance Load (2.7V)
DS011991-16
DS011991-17
DS011991-18
Gain and Phase vs Capacitance Load (2.7V)
dVOS vs Supply Voltage
dVOS vs Common Mode Voltage (2.7V)
DS011991-19
DS011991-20
DS011991-21
Sinking Current vs Output Voltage (2.7V)
Sourcing Current vs Output Voltage (2.7V)
DS011991-22
DS011991-23
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LMC7101
Typical Performance Characteristics 3V PERFORMANCE
Open Loop Frequency Response (3V)
Single Supply, TA = 25C unless specified
Input Voltage vs Output Voltage (3V)
Input Voltage Noise vs Input Voltage (3V)
DS011991-24
DS011991-25
DS011991-26
Sourcing Current vs Output Voltage (3V)
Sinking Current vs Output Voltage (3V)
CMRR vs Input Voltage (3V)
DS011991-29 DS011991-27 DS011991-28
5V PERFORMANCE
Open Loop Frequency Response (5V) Input Voltage vs Output Voltage (5V) Input Voltage Noise vs Input Voltage (5V)
DS011991-30
DS011991-31 DS011991-32
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LMC7101
5V PERFORMANCE
Sourcing Current vs Output Voltage (5V)
(Continued)
Sinking Current vs Output Voltage (5V)
CMRR vs Input Voltage (5V)
DS011991-35 DS011991-33 DS011991-34
Typical Performance Characteristics
Open Loop Frequency Response (15V)
VS = +15V, Single Supply, TA = 25C unless specified Input Voltage Noise vs Input Voltage (15V)
Input Voltage vs Output Voltage (15V)
DS011991-36 DS011991-37 DS011991-38
Sourcing Current vs Output Voltage (15V)
Sinking Current vs Output Voltage (15V)
CMRR vs Input Voltage (15V)
DS011991-41 DS011991-39 DS011991-40
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LMC7101
Typical Performance Characteristics
specified (Continued) Supply Current vs Supply Voltage Input Current vs Temperature
VS = +15V, Single Supply, TA = 25C unless
Output Voltage Swing vs Supply Voltage
DS011991-42
DS011991-43
DS011991-44
Input Voltage Noise vs Frequency
Positive PSRR vs Frequency
Negative PSRR vs Frequency
DS011991-45
DS011991-46
DS011991-47
CMRR vs Frequency
Open Loop Frequency Response @ -40C
Open Loop Frequency Response @ 25C
DS011991-48 DS011991-49 DS011991-50
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LMC7101
Typical Performance Characteristics
specified (Continued) Open Loop Frequency Response @ 85C
VS = +15V, Single Supply, TA = 25C unless
Maximum Output Swing vs Frequency
Gain and Phase vs Capacitive Load
DS011991-51
DS011991-52
DS011991-53
Gain and Phase vs Capacitive Load
Output Impedance vs Frequency
Slew Rate vs Temperature
DS011991-54
DS011991-55 DS011991-56
Slew Rate vs Supply Voltage
Inverting Small Signal Pulse Response
Inverting Small Signal Pulse Response
DS011991-57
DS011991-58
DS011991-59
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LMC7101
Typical Performance Characteristics
specified (Continued) Inverting Small Signal Pulse Response
VS = +15V, Single Supply, TA = 25C unless
Inverting Large Signal Pulse Response
Inverting Large Signal Pulse Response
DS011991-60
DS011991-61
DS011991-62
Inverting Large Signal Pulse Response
Non-Inverting Small Signal Pulse Response
Non-Inverting Small Signal Pulse Response
DS011991-63
DS011991-64
DS011991-65
Non-Inverting Small Signal Pulse Response
Non-Inverting Large Signal Pulse Response
Non-Inverting Large Signal Pulse Response
DS011991-66
DS011991-67
DS011991-68
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LMC7101
Typical Performance Characteristics
specified (Continued) Non-Inverting Large Signal Pulse Response Stability vs Capacitive Load
VS = +15V, Single Supply, TA = 25C unless
Stability vs Capacitive Load
DS011991-69 DS011991-70 DS011991-71
Stability vs Capacitive Load
Stability vs Capacitive Load
Stability vs Capacitive Load
DS011991-75
DS011991-76
DS011991-77
Stability vs Capacitive Load
DS011991-78
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LMC7101
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 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. 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 k load at 5V supplies. This makes the Tiny an excellent for audio, modems, and low frequency signal processing. Low Supply Current. The typical 0.5 mA supply current of the LMC7101 extends battery life in portable applications, and may allow the reduction of the size of batteries in some applications. Wide Voltage Range. The LMC7101 is characterized at 15V, 5V and 3V. Performance 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.
DS011991-8
FIGURE 1. An Input Voltage Signal Exceeds the LMC7101 Power Supply Voltages with No Output Phase Inversion
DS011991-9
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.
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.
DS011991-10
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 180 sourcing and 130 sinking at VS = 3V and 110 sourcing and 80 sinking at VS = 5V. Using the calculated output resistance, maximum output voltage swing can be estimated as a function of load.
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 follower is the most sensitive configuration. Direct capacitive loading reduces the phase margin of op-amps. The combiwww.national.com 14
LMC7101
4.0 Capacitive Load Tolerance
(Continued) nation 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.
DS011991-11
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 k) 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 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 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.)
DS011991-12
FIGURE 5. Cancelling the Effect of Input Capacitance
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LMC7101
SOT-23-5 Tape and Reel Specification
TAPE FORMAT Tape Section Leader (Start End) Carrier Trailer (Hub End) TAPE DIMENSIONS
# Cavities
0 (min) 75 (min) 3000 1000 125 (min) 0 (min)
Cavity Status Empty Empty Filled Filled Empty Empty
Cover Tape Status Sealed Sealed Sealed Sealed Sealed Sealed
DS011991-13
8 mm Tape Size
0.130 (3.3) DIM A
0.124 (3.15) DIM Ao
0.130 (3.3) DIM B
0.126 (3.2) DIM Bo
0.138 0.002 (3.5 0.05) DIM F
0.055 0.004 (1.4 0.11) DIM Ko
0.157 (4) DIM P1
0.315 0.012 (8 0.3) DIM W
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LMC7101
SOT-23-5 Tape and Reel Specification
REEL DIMENSIONS
(Continued)
DS011991-14
8 mm Tape Size
7.00 330.00 A
0.059 0.512 0.795 2.165 1.50 B 13.00 20.20 55.00 C D N
0.331 + 0.059/-0.000 8.40 + 1.50/-0.00 W1
0.567 14.40 W2
W1+ 0.078/-0.039 W1 + 2.00/-1.00 W3
6.0 SPICE Macromodel
A SPICE macromodel is available for the LMC7101. This model includes simulation of:
*
* * * *
Input common-mode voltage range Frequency and transient response GBW dependence on loading conditions Quiescent and dynamic supply current
Output swing dependence on loading conditions and many more characteristics as listed on the macro model disk. Contact your local National Semiconductor sales office to obtain an operational amplifier spice model library disk.
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LMC7101 Tiny Low Power Operational Amplifier with Rail-To-Rail Input and Output
Physical Dimensions
inches (millimeters) unless otherwise noted
5-Pin SOT Package Order Number LMC7101AIM5, LMC7101AIM5X, LMC7101BIM5 or LMC7101BIM5X NS Package Number MA05A
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

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