Datasheet

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LMC6032

www.ti.com

SNOS609C –NOVEMBER 1994–REVISED MARCH 2013

LMC6032 CMOS Dual Operational Amplifier

Check for Samples: LMC6032

FEATURES

• Long-Term Integrator

• Sample-and-Hold Circuit

• Specified for 2 kΩ and 600 Ω Loads

• Medical Instrumentation

• High Voltage Gain: 12 dB

• Low Offset Voltage Drift: 2.3 μV/°C

DESCRIPTION

• Ultra Low Input Bias Current: 40 fA

The LMC6032 is a CMOS dual operational amplifier

• Input Common-mode Range Includes V

−

which can operate from either a single supply or dual

• Operating Range From +5V to +15V Supply supplies. Its performance features include an input

common-mode range that reaches ground, low input

• I

= 400 μA/Amplifier; Independent of V

bias current, and high voltage gain into realistic loads,

• Low Distortion: 0.01% at 10 kHz

such as 2 kΩ and 600 Ω.

• Slew Rate: 1.1 V/μs

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

• Improved Performance Over TLC272

Silicon-Gate CMOS process.

See the LMC6034 datasheet for a CMOS quad

APPLICATIONS

operational amplifier with these same features. For

• High-Impedance Buffer or Preamplifier

higher performance characteristics refer to the

LMC662.

• Current-to-Voltage Converter

CONNECTION DIAGRAMS

8-Pin PDIP/SOIC

Top View

Figure 1. 10 Hz High-Pass Filter

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 (25 pages)

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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 LMC6032 CMOS Dual Operational Amplifier Check for Samples: LMC6032 FEATURES 1 • • • • • • • • • • 2 Specified for 2 kΩ and 600 Ω Loads High Voltage Gain: 12 dB Low Offset Voltage Drift: 2.3 μV/°C Ultra Low Input Bias Current: 40 fA Input Common-mode Range Includes V− Operating Range From +5V to +15V Supply ISS = 400 μA/Amplifier; Independent of V+ Low Distortion: 0.01% at 10 kHz Slew Rate: 1.
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LMC6032 SNOS609C – NOVEMBER 1994 – 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) Differential Input Voltage ±Supply Voltage Supply Voltage (V+ − V−) 16V Output Short Circuit to V+ See (2) Output Short Circuit to V− See (3) Lead Temperature (Soldering, 10 sec.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – 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− = GND = 0V, VCM = 1.5V, VOUT = 2.5V and RL > 1M unless otherwise specified. Symbol Parameter Conditions Typical (1) LMC6032I Units Limit (2) VOS Input Offset Voltage 1 ΔVOS/ΔT Input Offset Voltage Average Drift 2.3 IB Input Bias Current 0.
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LMC6032 SNOS609C – NOVEMBER 1994 – 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− = GND = 0V, VCM = 1.5V, VOUT = 2.5V and RL > 1M unless otherwise specified. Symbol Parameter Conditions Typical (1) LMC6032I Units Limit (2) VO Output Voltage Swing + V = 5V RL = 2 kΩ to 2.5V 4.87 0.10 V+ = 5V RL = 600Ω to 2.5V 4.61 0.30 V+ = 15V RL = 2 kΩ to 7.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – 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− = GND = 0V, VCM = 1.5V, VOUT = 2.5V and RL > 1M unless otherwise specified. Symbol Parameter Conditions Typical (1) LMC6032I Units Limit (2) SR Slew Rate See (3) 1.1 0.8 0.4 V/μs min GBW Gain-Bandwidth Product 1.
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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS VS = ±7.5V, TA = 25°C unless otherwise specified 6 Supply Current vs Supply Voltage Input Bias Current Figure 2. Figure 3. Output Characteristics Current Sinking Output Characteristics Current Sourcing Figure 4. Figure 5. Input Voltage Noise vs Frequency CMRR vs Frequency Figure 6. Figure 7.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VS = ±7.5V, TA = 25°C unless otherwise specified Open-Loop Frequency Response Frequency Response vs Capacitive Load Figure 8. Figure 9. Non-Inverting Large Signal Pulse Response Stability vs Capacitive Load Figure 10. Figure 11. Stability vs Capacitive Load Stability vs Capacitive Load Figure 12. Figure 13.
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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) VS = ±7.5V, TA = 25°C unless otherwise specified Stability vs Capacitive Load Avoid resistive loads of less than 500Ω, as they may cause instability. Figure 14.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 APPLICATION HINTS AMPLIFIER TOPOLOGY The topology chosen for the LMC6032, shown in Figure 15, is unconventional (compared to general-purpose op amps) in that the traditional unity-gain buffer output stage is not used; instead, the output is taken directly from the output of the integrator, to allow a larger output swing.
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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com where is the amplifier's low-frequency noise gain and GBW is the amplifier's gain bandwidth product. An amplifier's lowfrequency noise gain is represented by the formula regardless of whether the amplifier is being used in an inverting or non-inverting mode. Note that a feedback capacitor is more likely to be needed when the noise gain is low and/or the feedback resistor is large.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 CAPACITIVE LOAD TOLERANCE Like many other op amps, the LMC6032 may oscillate when its applied load appears capacitive. The threshold of oscillation varies both with load and circuit gain. The configuration most sensitive to oscillation is a unity-gain follower. See the Typical Performance Characteristics. The load capacitance interacts with the op amp's output resistance to create an additional pole.
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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com Figure 19. Example of Guard Ring in P.C. Board Layout Figure 20. Inverting Amplifier Guard Ring Connections Figure 21. Non-Inverting Amplifier Guard Ring Connections Figure 22.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 Figure 23. Howland Current Pump Guard Ring Connections 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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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com BIAS CURRENT TESTING The test method of Figure 25 is appropriate for bench-testing bias current with reasonable accuracy. To understand its operation, first close switch S2 momentarily. When S2 is opened, then Figure 25. Simple Input Bias Current Test Circuit A suitable capacitor for C2 would be a 5 pF or 10 pF silver mica, NPO ceramic, or air-dielectric.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 TYPICAL SINGLE-SUPPLY APPLICATIONS (V+ = 5.0 VDC) Additional single-supply applications ideas can be found in the LM358 datasheet. The LMC6032 is pin-for-pin compatible with the LM358 and offers greater bandwidth and input resistance over the LM358. These features will improve the performance of many existing single-supply applications. Note, however, that the supply voltage range of the LMC6032 is smaller than that of the LM358.
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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com TYPICAL SINGLE-SUPPLY APPLICATIONS (continued) + (V = 5.0 VDC) Figure 28. Low-Leakage Sample-and-Hold Figure 29. 1 Hz Square-Wave Oscillator Figure 30. Power Amplifier fO = 10 Hz Q = 2.1 Gain = −8.8 Figure 31.
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LMC6032 www.ti.com SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 TYPICAL SINGLE-SUPPLY APPLICATIONS (continued) + (V = 5.0 VDC) Figure 32. 1 Hz Low-Pass Filter (Maximally Flat, Dual Supply Only) fc = 10 Hz d = 0.895 Gain = 1 2 dB passband ripple Figure 33. 10 Hz High-Pass Filter Gain = −46.8 Output offset voltage reduced to the level of the input offset voltage of the bottom amplifier (typically 1 mV). Figure 34.
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LMC6032 SNOS609C – NOVEMBER 1994 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 18 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 1-Nov-2013 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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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 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LMC6032IMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6032IMX/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 26-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMC6032IMX SOIC D 8 2500 367.0 367.0 35.0 LMC6032IMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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