Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose DIP 14

191:

9.95k

10k,

0.1%

10k, 0.1%

10k,

0.1%

50:

OUT

= 100V

- 1/2V

10:

Gain

Trim

+ 1/2V

CMRR

Trim

LMC6462, LMC6464

www.ti.com

SNOS725D –MAY 1999–REVISED MARCH 2013

LMC6462 Dual/LMC6464 Quad Micropower, Rail-to-Rail Input and Output CMOS

Operational Amplifier

Check for Samples: LMC6462, LMC6464

FEATURES

DESCRIPTION

The LMC6462/4 is a micropower version of the

• (Typical Unless Otherwise Noted)

popular LMC6482/4, combining Rail-to-Rail Input and

• Ultra Low Supply Current 20 μA/Amplifier

Output Range with very low power consumption.

• Ensured Characteristics at 3V and 5V

The LMC6462/4 provides an input common-mode

• Rail-to-Rail Input Common-Mode Voltage

voltage range that exceeds both rails. The rail-to-rail

Range

output swing of the amplifier, ensured for loads down

to 25 kΩ, assures maximum dynamic signal range.

• Rail-to-Rail Output Swing

This rail-to-rail performance of the amplifier,

– (within 10 mV of rail, V

= 5V and R

= 25

combined with its high voltage gain makes it unique

kΩ)

among rail-to-rail amplifiers. The LMC6462/4 is an

• Low Input Current 150 fA

excellent upgrade for circuits using limited common-

mode range amplifiers.

• Low Input Offset Voltage 0.25 mV

The LMC6462/4, with ensured specifications at 3V

APPLICATIONS

and 5V, is especially well-suited for low voltage

applications. A quiescent power consumption of 60

• Battery Operated Circuits

μW per amplifier (at V

= 3V) can extend the useful

• Transducer Interface Circuits

life of battery operated systems. The amplifier's 150

• Portable Communication Devices

fA input current, low offset voltage of 0.25 mV, and

85 dB CMRR maintain accuracy in battery-powered

• Medical Applications

systems.

• Battery Monitoring

Figure 1. 8-Pin PDIP/SOIC – Top View Figure 2. 14-Pin PDIP/SOIC – Top View

(See Package Number P or D) (See Package Number NFF0014A or D)

Figure 3. Low-Power Two-Op-Amp Instrumentation Amplifier

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 (32 pages)

PAGE 1
LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 LMC6462 Dual/LMC6464 Quad Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifier Check for Samples: LMC6462, LMC6464 FEATURES DESCRIPTION • • • • The LMC6462/4 is a micropower version of the popular LMC6482/4, combining Rail-to-Rail Input and Output Range with very low power consumption.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED 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. Absolute Maximum Ratings (1) (2) (3) ESD Tolerance (4) 2.0 kV Differential Input Voltage ±Supply Voltage (V+) + 0.3V, (V−) − 0.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 5V DC Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 5V, V− = 0V, VCM = VO = V+/2 and RL > 1M. Boldface limits apply at the temperature extremes. Typ (1) Symbol Parameter IOS Input Offset Current CIN Common-Mode Input Capacitance RIN Input Resistance CMRR Common Mode Rejection Ratio +PSRR −PSRR VCM Conditions See (3) 0.075 85 0V ≤ VCM ≤ 5.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com 5V DC Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 5V, V− = 0V, VCM = VO = V+/2 and RL > 1M. Boldface limits apply at the temperature extremes.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 3V DC Electrical Characteristics Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 3V, V− = 0V, VCM = VO = V+/2 and RL > 1M. Boldface limits apply at the temperature extremes. Typ (1) Symbol VOS Parameter Conditions Input Offset Voltage 0.9 LMC6462AI LMC6464AI Limit (2) LMC6462BI LMC6464BI Limit (2) LMC6462AM LMC6464AM Limit (2) 2.0 3.0 2.0 2.7 3.7 3.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics VS = +5V, Single Supply, TA = 25°C unless otherwise specified 6 Supply Current vs. Supply Voltage Sourcing Current vs. Output Voltage Figure 4. Figure 5. Sourcing Current vs. Output Voltage Sourcing Current vs. Output Voltage Figure 6. Figure 7. Sinking Current vs. Output Voltage Sinking Current vs. Output Voltage Figure 8. Figure 9.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = +5V, Single Supply, TA = 25°C unless otherwise specified Sinking Current vs. Output Voltage Input Voltage Noise vs Frequency Figure 10. Figure 11. Input Voltage Noise vs. Input Voltage Input Voltage Noise vs. Input Voltage Figure 12. Figure 13. Input Voltage Noise vs. Input Voltage ΔVOS vs CMR Figure 14. Figure 15.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = +5V, Single Supply, TA = 25°C unless otherwise specified 8 Input Voltage vs. Output Voltage Open Loop Frequency Response Figure 16. Figure 17. Open Loop Frequency Response vs. Temperature Gain and Phase vs. Capacitive Load Figure 18. Figure 19. Slew Rate vs. Supply Voltage Non-Inverting Large Signal Pulse Response Figure 20. Figure 21.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = +5V, Single Supply, TA = 25°C unless otherwise specified Non-Inverting Large Signal Pulse Response Non-Inverting Large Signal Pulse Response Figure 22. Figure 23. Non-Inverting Small Signal Pulse Response Non-Inverting Small Signal Pulse Response Figure 24. Figure 25. Non-Inverting Small Signal Pulse Response Inverting Large Signal Pulse Response Figure 26. Figure 27.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = +5V, Single Supply, TA = 25°C unless otherwise specified Inverting Large Signal Pulse Response Inverting Large Signal Pulse Response Figure 28. Figure 29. Inverting Small Signal Pulse Response Inverting Small Signal Pulse Response Figure 30. Figure 31. Inverting Small Signal Pulse Response Figure 32.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 APPLICATION INFORMATION Input Common-Mode Voltage Range The LMC6462/4 has a rail-to-rail input common-mode voltage range. Figure 33 shows an input voltage exceeding both supplies with no resulting phase inversion on the output. Figure 33. An Input Voltage Signal Exceeds the LMC6462/4 Power Supply Voltage with No Output Phase Inversion The absolute maximum input voltage at V+ = 3V is 300 mV beyond either supply rail at room temperature.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com Figure 34. A ±7.5V Input Signal Greatly Exceeds the 3V Supply in Figure 35 Causing No Phase Inversion Due to RI Figure 35. Input Current Protection for Voltages Exceeding the Supply Voltage Rail-to-Rail Output The approximated output resistance of the LMC6462/4 is 180Ω sourcing, and 130Ω sinking at VS = 3V, and 110Ω sourcing and 83Ω sinking at VS = 5V.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 Figure 36. Resistive Isolation of a 300 pF Capacitive Load Figure 37. Pulse Response of the LMC6462 Circuit Shown in Figure 36 Figure 37 displays the pulse response of the LMC6462/4 circuit in Figure 36. Another circuit, shown in Figure 38, is also used to indirectly drive capacitive loads. This circuit is an improvement to the circuit shown in Figure 36 because it provides DC accuracy as well as AC stability.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com Figure 38. LMC6462 Non-Inverting Amplifier, Compensated to Handle a 300 pF Capacitive and 100 kΩ Resistive Load Figure 39. Pulse Response of LMC6462 Circuit in Figure 38 The pulse response of the circuit shown in Figure 38 is shown in Figure 39 Compensating for Input Capacitance It is quite common to use large values of feedback resistance with amplifiers that have ultra-low input current, like the LMC6462/4.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 Figure 40. Canceling the Effect of Input Capacitance The effect of input capacitance can be compensated for by adding a feedback capacitor. The feedback capacitor (as in Figure 40 ), 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.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 • • • • www.ti.com 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 macromodel disk.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 Figure 44. Typical Connections of Guard Rings – Inverting Amplifier Figure 45. Typical Connections of Guard Rings – Non-Inverting Amplifier Figure 46.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com A small valued potentiometer is used in series with RG to set the differential gain of the three op-amp instrumentation circuit in Figure 48. This combination is used instead of one large valued potentiometer to increase gain trim accuracy and reduce error due to vibration. Figure 48. Low Power Three Op-Amp Instrumentation Amplifier A two op-amp instrumentation amplifier designed for a gain of 100 is shown in Figure 49.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 TYPICAL SINGLE-SUPPLY APPLICATIONS Transducer Interface Circuits Figure 50. Photo Detector Circuit Photocells can be used in portable light measuring instruments. The LMC6462, which can be operated off a battery, is an excellent choice for this circuit because of its very low input current and offset voltage. LMC6462 as a Comparator Figure 51. Comparator with Hysteresis Figure 51 shows the application of the LMC6462 as a comparator.
PAGE 20
LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com In Figure 52 Figure 53, RI limits current into the amplifier since excess current can be caused by the input voltage exceeding the supply voltage. Precision Current Source Figure 54. Precision Current Source The output current IOUT is given by: (3) Oscillators Figure 55. 1 Hz Square-Wave Oscillator For single supply 5V operation, the output of the circuit will swing from 0V to 5V.
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LMC6462, LMC6464 www.ti.com SNOS725D – MAY 1999 – REVISED MARCH 2013 Then, (7) (8) = 1 Hz Low Frequency Null Figure 56. High Gain Amplifier with Low Frequency Null Output offset voltage is the error introduced in the output voltage due to the inherent input offset voltage VOS, of an amplifier. Output Offset Voltage = (Input Offset Voltage) (Gain) In the above configuration, the resistors R5 and R6 determine the nominal voltage around which the input signal, VIN should be symmetrical.
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LMC6462, LMC6464 SNOS725D – MAY 1999 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision C (March 2013) to Revision D • 22 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.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 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.
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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 LMC6462AIMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6462AIMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6462BIMX/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) LMC6462AIMX SOIC D 8 2500 367.0 367.0 35.0 LMC6462AIMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMC6462BIMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMC6464AIMX SOIC D 14 2500 367.0 367.0 35.0 LMC6464AIMX/NOPB SOIC D 14 2500 367.0 367.0 35.0 LMC6464BIMX SOIC D 14 2500 367.0 367.0 35.
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MECHANICAL DATA NFF0014A N0014A N14A (Rev G) www.ti.
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