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LMC6044

www.ti.com

SNOS612D –NOVEMBER 1994–REVISED MARCH 2013

LMC6044 CMOS Quad Micropower Operational Amplifier

Check for Samples: LMC6044

FEATURES

APPLICATIONS

• Low Supply Current: 10 μA/Amp (Typ)

• Battery Monitoring and Power Conditioning

• Operates from 4.5V to 15.5V Single Supply • Photodiode and Infrared Detector Preamplifier

• Ultra Low Input Current: 2 fA (Typ) • Silicon Based Transducer Systems

• Rail-to-Rail Output Swing • Hand-Held Analytic Instruments

• Input Common-Mode Range Includes Ground • pH Probe Buffer Amplifier

• Fire and Smoke Detection Systems

• Charge Amplifier for Piezoelectric Transducers

DESCRIPTION

Ultra-low power consumption and low input-leakage current are the hallmarks of the LMC6044. Providing input

currents of only 2 fA typical, the LMC6044 can operate from a single supply, has output swing extending to each

supply rail, and an input voltage range that includes ground.

The LMC6044 is ideal for use in systems requiring ultra-low power consumption. In addition, the insensitivity to

latch-up, high output drive, and output swing to ground without requiring external pull-down resistors make it

ideal for single-supply battery-powered systems.

Other applications for the LMC6044 include bar code reader amplifiers, magnetic and electric field detectors, and

hand-held electrometers.

This device is built with National's advanced Double-Poly Silicon-Gate CMOS process.

See the LMC6041 for a single, and the LMC6042 for a dual amplifier with these features.

Connection Diagram

14-Pin PDIP/SOIC Instrumentation Amplifier

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 (23 pages)

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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 LMC6044 CMOS Quad Micropower Operational Amplifier Check for Samples: LMC6044 FEATURES APPLICATIONS 1 • • • • • 2 Low Supply Current: 10 μA/Amp (Typ) Operates from 4.5V to 15.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com Absolute Maximum Ratings (1) (2) Differential Input Voltage ±Supply Voltage Supply Voltage (V+ − V−) 16V Output Short Circuit to V+ See (3) Output Short Circuit to V− See (4) Lead Temperature (Soldering, 10 sec.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 Electrical Characteristics Unless otherwise specified, all limits guaranteed for TA = TJ = 25°C. Boldface limits apply at the temperature extremes. V+ = 5V, V− = 0V, VCM = 1.5V, VO = V+/2, and RL > 1M unless otherwise specified. Symbol VOS Parameter Conditions Typical (1) 1 Input Offset Voltage LMC6044AI Limit (2) LMC6044I Limit (2) 3 6 mV 3.3 6.3 max TCVOS Input Offset Voltage Average Drift IB Input Bias Current 0.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) Unless otherwise specified, all limits guaranteed for TA = TJ = 25°C. Boldface limits apply at the temperature extremes. V+ = 5V, V− = 0V, VCM = 1.5V, VO = V+/2, and RL > 1M unless otherwise specified.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 Typical Performance Characteristics VS = ±7.5V, TA = 25°C unless otherwise specified Supply Current vs Supply Voltage Offset Voltage vs Temperature of Five Representative Units Figure 1. Figure 2. Input Bias Current vs Temperature Input Bias Current vs Input Common-Mode Voltage Figure 3. Figure 4. Input Common-Mode Voltage Range vs Temperature Output Characteristics Current Sinking Figure 5. Figure 6.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C unless otherwise specified 6 Output Characteristics Current Sourcing Output Characteristics vs Frequency Figure 7. Figure 8. Crosstalk Rejection vs Frequency CMRR vs Frequency Figure 9. Figure 10. CMRR vs Temperature Power Supply Rejection Ratio vs Frequency Figure 11. Figure 12.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C unless otherwise specified Open-Loop Voltage Gain vs Temperature Open-Loop Frequency Response Figure 13. Figure 14. Gain and Phase Responses vs Load Capacitance Gain and Phase Responses vs Temperature Figure 15. Figure 16. Gain Error (VOS vs VOUT) Common-Mode Error vs Common-Mode Voltage of Three Representative Units Figure 17. Figure 18.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C unless otherwise specified 8 Non-Inverting Slew Rate vs Temperature Inverting Slew Rate vs Temperature Figure 19. Figure 20. Non-Inverting Large Signal Pulse Response (AV = +1) Non-Inverting Small Signal Pulse Response Figure 21. Figure 22. Inverting Large-Signal Pulse Response Inverting Small Signal Pulse Response Figure 23. Figure 24.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = ±7.5V, TA = 25°C unless otherwise specified Stability vs Capacitive Load Stability vs Capacitive Load Figure 25. Figure 26.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com APPLICATION HINTS AMPLIFIER TOPOLOGY The LMC6044 incorporates a novel op-amp design topology that enables it to maintain rail to rail output swing even when driving a large load. Instead of relying on a push-pull unity gain outupt buffer stage, the output stage is taken directly from the internal integrator, which provides both low output impedance and large gain.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 Figure 28. LMC6044 Noninverting Gain of 10 Amplifier, Compensated to Handle Capacitive Loads In the circuit of Figure 28, R1 and C1 serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the amplifier's inverting input, thereby preserving phase margin in the overall feedback loop. Capacitive load driving capability is enhanced by using a pull up resistor to V+ (Figure 29).
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com Figure 30. Example of Guard Ring in P.C. Board Layout To minimize the effect of any surface leakage, lay out a ring of foil completely surrounding the LMC6044's inputs and the terminals of capacitors, diodes, conductors, resistors, relay terminals, etc. connected to the op-amp's inputs, as in Figure 30. To have a significant effect, guard rings should be placed on both the top and bottom of the PC board.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 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. Air is an excellent insulator.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com (V+ = 5.0 VDC) Figure 35. Two Op-Amp Instrumentation Amplifier Figure 36. Low-Power Two-Op-Amp Instrumentation Amplifier Figure 37. Low-Leakage Sample-and-Hold Figure 38.
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LMC6044 www.ti.com SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 (V+ = 5.0 VDC) Figure 39. 1 Hz Square-Wave Oscillator Figure 40.
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LMC6044 SNOS612D – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision C (March 2013) to Revision D • 16 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 LMC6044AIMX SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.0 Q1 LMC6044AIMX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.0 Q1 LMC6044IMX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.
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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) LMC6044AIMX SOIC D 14 2500 367.0 367.0 35.0 LMC6044AIMX/NOPB SOIC D 14 2500 367.0 367.0 35.0 LMC6044IMX/NOPB 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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