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LMC6081

www.ti.com

SNOS649C –AUGUST 2000–REVISED MARCH 2013

LMC6081 Precision CMOS Single Operational Amplifier

Check for Samples: LMC6081

FEATURES

DESCRIPTION

The LMC6081 is a precision low offset voltage

• (Typical unless otherwise stated)

operational amplifier, capable of single supply

• Low offset voltage: 150 μV

operation. Performance characteristics include ultra

• Operates from 4.5V to 15V single supply

low input bias current, high voltage gain, rail-to-rail

output swing, and an input common mode voltage

• Ultra low input bias current: 10 fA

range that includes ground. These features, plus its

• Output swing to within 20 mV of supply rail,

low offset voltage, make the LMC6081 ideally suited

100k load

for precision circuit applications.

• Input common-mode range includes V

−

Other applications using the LMC6081 include

• High voltage gain: 130 dB

precision full-wave rectifiers, integrators, references,

• Improved latchup immunity

and sample-and-hold circuits.

This device is built with TI's advanced Double-Poly

APPLICATIONS

Silicon-Gate CMOS process.

• Instrumentation amplifier

For designs with more critical power demands, see

• Photodiode and infrared detector preamplifier

the LMC6061 precision micropower operational

amplifier.

• Transducer amplifiers

• Medical instrumentation

For a dual or quad operational amplifier with similar

features, see the LMC6082 or LMC6084 respectively.

• D/A converter

• Charge amplifier for piezoelectric transducers

Connection Diagram

8-Pin PDIP/SOIC Package - Top View Low-Leakage Sample and Hold

Figure 1. See Package Number P0008E/D0008A Figure 2.

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.

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.

2All trademarks are the property of their respective owners.

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.

Summary of content (21 pages)

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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 LMC6081 Precision CMOS Single Operational Amplifier Check for Samples: LMC6081 FEATURES DESCRIPTION • • • • • The LMC6081 is a precision low offset voltage operational amplifier, capable of single supply operation. Performance characteristics include ultra low input bias current, high voltage gain, rail-to-rail output swing, and an input common mode voltage range that includes ground.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 Absolute Maximum Ratings www.ti.com (1) Differential Input Voltage ±Supply Voltage (V+) +0.3V, Voltage at Input/Output Pin (V−) −0.3V Supply Voltage (V+ − V−) 16V + (2) − (3) Output Short Circuit to V Output Short Circuit to V Lead Temperature (Soldering, 10 Sec.) 260°C Storage Temp.
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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 DC Electrical Characteristics Unless otherwise specified, all limits ensured for TJ = 25°C. Boldface limits apply at the temperature extremes. V+ = 5V, V− = 0V, VCM = 1.5V, VO = 2.5V and RL > 1M unless otherwise specified. Symbol VOS Parameter Conditions Input Offset Voltage TCVOS Typ (1) LMC6081AM Limit (2) LMC6081AI Limit (2) 350 350 800 μV 1000 800 1300 Max 150 Input Offset Voltage LMC6081I Units Limit (2) μV/°C 1.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 www.ti.com DC Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C. Boldface limits apply at the temperature extremes. V+ = 5V, V− = 0V, VCM = 1.5V, VO = 2.5V and RL > 1M unless otherwise specified. Symbol VO Parameter Conditions V+ = 5V Output Swing Typ (1) LMC6081AM Limit (2) LMC6081AI Limit (2) 4.87 4.80 4.80 4.75 V 4.70 4.73 4.67 Min 0.13 0.13 0.20 V 0.19 0.17 0.24 Max 4.50 4.
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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 AC Electrical Characteristics Unless otherwise specified, all limits ensured for TJ = 25°C, Boldface limits apply at the temperature extremes. V+ = 5V, V− = 0V, VCM = 1.5V, VO = 2.5V and RL > 1M unless otherwise specified. Symbol SR Parameter Slew Rate Conditions (3) Typ (1) LMC6081AM Limit (2) LMC6081AI Limit (2) LMC6081 Limit (2) 0.8 0.8 0.8 0.5 0.6 0.6 1.5 Units V/μs Min GBW Gain-Bandwidth Product 1.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics VS = ±7.5V, TA = 25°C, Unless otherwise specified 6 Distribution of LMC6081 Input Offset Voltage (TA = +25°C) Distribution of LMC6081 Input Offset Voltage (TA = −55°C) Figure 3. Figure 4. Distribution of LMC6081 Input Offset Voltage (TA = +125°C) Input Bias Current vs Temperature Figure 5. Figure 6. Supply Current vs Supply Voltage Input Voltage vs Output Voltage Figure 7. Figure 8.
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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C, Unless otherwise specified Common Mode Rejection Ratio vs Frequency Power Supply Rejection Ratio vs Frequency Figure 9. Figure 10. Input Voltage Noise vs Frequency Output Characteristics Sourcing Current Figure 11. Figure 12. Output Characteristics Sinking Current Gain and Phase Response vs Temperature (−55°C to +125°C) Figure 13. Figure 14.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C, Unless otherwise specified 8 Gain and Phase Response vs Capacitive Load with RL = 600Ω Gain and Phase Response vs Capacitive Load with RL = 500 kΩ Figure 15. Figure 16. Open Loop Frequency Response Inverting Small Signal Pulse Response Figure 17. Figure 18. Inverting Large Signal Pulse Response Non-Inverting Small Signal Pulse Response Figure 19. Figure 20.
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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C, Unless otherwise specified Non-Inverting Large Signal Pulse Response Stability vs Capacitive Load, RL = 600Ω Figure 21. Figure 22. Stability vs Capacitive Load RL = 1 MΩ Figure 23. APPLICATION INFORMATION AMPLIFIER TOPOLOGY The LMC6081 incorporates a novel op-amp design topology that enables it to maintain rail-to-rail output swing even when driving a large load.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 www.ti.com When high input impedances are demanded, guarding of the LMC6081 is suggested. Guarding input lines will not only reduce leakage, but lowers stray input capacitance as well. (See Printed-Circuit-Board Layout for High Impedance Work).
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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 Capacitive load driving capability is enhanced by using a pull up resistor to V+ (Figure 26). Typically a pull up resistor conducting 500 μA or more will significantly improve capacitive load responses. The value of the pull up resistor must be determined based on the current sinking capability of the amplifier with respect to the desired output swing.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 www.ti.com Inverting Amplifier Non-Inverting Amplifier Follower Figure 28. Typical Connections of Guard Rings The designer should be aware that when it is inappropriate to lay out a PC board for the sake of just a few circuits, there is another technique which is even better than a guard ring on a PC board: Don't insert the amplifier's input pin into the board at all, but bend it up in the air and use only air as an insulator.
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LMC6081 www.ti.com SNOS649C – AUGUST 2000 – REVISED MARCH 2013 The extremely high input impedance, and low power consumption, of the LMC6081 make it ideal for applications that require battery-powered instrumentation amplifiers. Examples of these types of applications are hand-held pH probes, analytic medical instruments, magnetic field detectors, gas detectors, and silicon based pressure transducers.
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LMC6081 SNOS649C – AUGUST 2000 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 14 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 1-Nov-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device 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 Device Marking for that device.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LMC6081AIMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6081IMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6081IMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMC6081AIMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMC6081IMX SOIC D 8 2500 367.0 367.0 35.0 LMC6081IMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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