Datasheet

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LMC6442

www.ti.com

SNOS013E –SEPTEMBER 1997–REVISED MARCH 2013

LMC6442 Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier

Check for Samples: LMC6442

FEATURES

DESCRIPTION

The LMC6442 is ideal for battery powered systems,

• (Typical, V

= 2.2V)

where very low supply current (less than one

• Output Swing to Within 30 mV of Supply Rail

microamp per amplifier) and Rail-to-Rail output swing

• High Voltage Gain 103 dB

is required. It is characterized for 2.2V to 10V

operation, and at 2.2V supply, the LMC6442 is ideal

• Gain Bandwidth Product 9.5 KHz

for single (Li-Ion) or two cell (NiCad or alkaline)

• Ensured for: 2.2V, 5V, 10V

battery systems.

• Low Supply Current 0.95 µA/Amplifier

The LMC6442 is designed for battery powered

• Input Voltage Range −0.3V to V

-0.9V

systems that require long service life through low

• 2.1 µW/Amplifier Power Consumption

supply current, such as smoke and gas detectors,

and pager or personal communications systems.

• Stable for A

≥ +2 or A

≤ −1

Operation from single supply is enhanced by the wide

APPLICATIONS

common mode input voltage range which includes the

ground (or negative supply) for ground sensing

• Portable Instruments

applications. Very low (5 fA, typical) input bias current

• Smoke/Gas/CO/Fire Detectors

and near constant supply current over supply voltage

• Pagers/Cell Phones

enhance the LMC6442's performance near the end-

of-life battery voltage.

• Instrumentation

• Thermostats

Designed for closed loop gains of greater than plus

two (or minus one), the amplifier has typically 9.5

• Occupancy Sensors

KHz GBWP (Gain Bandwidth Product). Unity gain can

• Cameras

be used with a simple compensation circuit, which

• Active Badges

also allows capacitive loads of up to 300 pF to be

driven, as described in the Application Information

section.

Connection Diagram

Top View

Figure 1. 8-Pin SOIC / PDIP Package

See Package Numbers D0008A, P0008E

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 (24 pages)

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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 LMC6442 Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier Check for Samples: LMC6442 FEATURES DESCRIPTION • • • • • • • • • The LMC6442 is ideal for battery powered systems, where very low supply current (less than one microamp per amplifier) and Rail-to-Rail output swing is required. It is characterized for 2.2V to 10V operation, and at 2.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 (1) (2) Absolute Maximum Ratings ESD Tolerance www.ti.com (3) 2 kV Differential Input Voltage ±Supply Voltages (V+) + 0.3V, (V−) − 0.3V Voltage at Input/Output Pin Supply Voltage (V+ − V−): Current at Input Pin 16V (4) Current at Output Pin (5) ±5 mA (6) ±30 mA Lead Temp. (soldering 10 sec) 260°C −65°C to +150°C Storage Temp. Range: Junction Temp.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 2.2V Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 2.2V, V− = 0V, VCM = VO = V +/2, and RL = 1 MΩ to V+/2. Boldface limits apply at the temperature extremes. Parameter VCM Input Common-Mode Voltage Range AV Large Signal Voltage Gain Test Conditions 1.3 CMRR ≥ 50 dB Sourcing Sinking −0.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com 5V Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 5V, V− = 0V, VCM = VO = V +/2, and RL = 1 MΩ to V+/2. Boldface limits apply at the temperature extremes. Parameter VCM Test Conditions Input Common-Mode Voltage Range AV 4.1 CMRR ≥ 50 dB Large Signal Voltage Gain Sourcing Sinking −0.4 (4) Output Swing IS LMC6442I Limit (2) Units 3.85 3.75 3.85 3.75 V min −0.2 0 −0.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 10V Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TJ = 25°C, V+ = 10V, V− = 0V, VCM = VO = V +/2, and RL = 1 MΩ to V+/2. Boldface limits apply at the temperature extremes. Parameter VCM Input Common-Mode Voltage Range AV Large Signal Voltage Gain Test Conditions Typ 9.1 CMRR ≥ 50 dB Sourcing Sinking −0.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics VS = 5V, Single Supply, TA = 25°C unless otherwise specified 6 Total Supply Current vs. Supply Voltage Total Supply Current vs. Supply Voltage (Negative Input Overdrive) Figure 2. Figure 3. Total Supply Current vs. Supply Voltage (Positive Input Overdrive) Input Bias Current vs. Temperature Figure 4. Figure . Offset Voltage vs. Common Mode Voltage (VS = 2.2V) Offset Voltage vs.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = 5V, Single Supply, TA = 25°C unless otherwise specified Offset Voltage vs. Common Mode Voltage (VS = 10V) Swing Towards V− vs. Supply Voltage Figure 7. Figure 8. Swing Towards V+ vs. Supply Voltage Swing From Rail(s) vs. Temperature Figure 9. Figure 10. Output Source Current vs. Output Voltage Output Sink Current vs. Output Voltage Figure 11. Figure 12.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = 5V, Single Supply, TA = 25°C unless otherwise specified 8 Maximum Output Voltage vs. Load Resistance Large Signal Voltage Gain vs. Supply Voltage Figure 13. Figure 14. Open Loop Gain/Phase vs. Frequency Open Loop Gain/Phase vs. Frequency For Various CL (ZL = 1 MΩ II CL) Figure 15. Figure 16. Open Loop Gain/Phase vs.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = 5V, Single Supply, TA = 25°C unless otherwise specified Phase Margin (Worst Case) vs. Supply Voltage CMRR vs. Frequency Figure 19. Figure 20. PSRR vs. Frequency Positive Slew Rate vs. Supply Voltage Figure 21. Figure 22. Negative Slew Rate vs. Supply Voltage Cross-Talk Rejection vs. Frequency Figure 23. Figure 24.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) VS = 5V, Single Supply, TA = 25°C unless otherwise specified 10 Input Voltage Noise vs. Frequency Output Impedance vs. Frequency Figure 25. Figure 26. THD+N vs. Frequency THD+N vs. Amplitude Figure 27. Figure 28. Maximum Output Swing vs. Frequency Small Signal Step Response (AV = +2) (CL = 12 pF, 100 pF) Figure 29. Figure 30.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 Typical Performance Characteristics (continued) VS = 5V, Single Supply, TA = 25°C unless otherwise specified Large Signal Step Response (AV = +2) (CL = 100 pF) Small Signal Step Response (AV = −1) (CL= 1MΩ II 100 pF, 200 pF) Figure 31. Figure 32. Small Signal Step Response (AV = +1) For Various CL Large Signal Step Response (AV = +1) (CL = 200 pF) Figure 33. Figure 34.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com APPLICATIONS INFORMATION USING LMC6442 IN UNITY GAIN APPLICATIONS LMC6442 is optimized for maximum bandwidth and minimal external components when operating at a minimum closed loop gain of +2 (or −1). However, it is also possible to operate the device in a unity gain configuration by adding external compensation as shown in Figure 35: Figure 35.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 Looking at the problem from a different view, with RF defined by AV•Rin, one could select a value for R in the “T” Network and then determine R1 based on this selection: (4) Figure 37. “T” Network Values for Various Values of R For convenience, Figure 37 shows R1 vs. RF for different values of R.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com Figure 38. Minimum Operating Gain vs. Capacitive Load Figure 39.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 Application Circuits V + = 5V: IS < 10 µA, f/VC = 4.3 (Hz/V) Figure 40. Micropower Single Supply Voltage to Frequency Converter Figure 41.
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LMC6442 SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 www.ti.com Figure 42.
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LMC6442 www.ti.com SNOS013E – SEPTEMBER 1997 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision D (March 2013) to Revision E • 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 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 LMC6442AIMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6442AIMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMC6442IMX/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) LMC6442AIMX SOIC D 8 2500 367.0 367.0 35.0 LMC6442AIMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMC6442IMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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