LMC6462 Dual/LMC6464 Quad

Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifier

General 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.

The LMC6462/4 provides an input common-mode voltage range that exceeds both rails. The rail-to-rail output swing of the amplifier, guaranteed for loads down to 25 kΩ, assures maximum dynamic sigal range. This rail-to-rail performance of the amplifier, combined with its high voltage gain makes it unique among rail-to-rail amplifiers. The LMC6462/4 is an excellent upgrade for circuits using limited common-mode range amplifiers.

The LMC6462/4, with guaranteed specifications at 3V and 5V, is especially well-suited for low voltage applications. A quiescent power consumption of 60 µW per amplifier (at VS = 3V) can extend the useful life of battery operated systems. The amplifier’s 150 fA input current, low offset voltage of 0.25 mV, and 85 dB CMRR maintain accuracy in battery-powered systems.

Features

(Typical unless otherwise noted)

• Ultra Low Supply Current 20 µA/Amplifier

• Guaranteed Characteristics at 3V and 5V

• Rail-to-Rail Input Common-Mode Voltage Range

• Rail-to-Rail Output Swing (within 10 mV of rail, VS = 5V and RL = 25 kΩ)

• Low Input Current 150 fA

• Low Input Offset Voltage 0.25 mV

Applications

• Battery Operated Circuits

• Transducer Interface Circuits

• Portable Communication Devices

• Medical Applications

• Battery Monitoring

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

ESD Tolerance (Note 2) 2.0 kV

Differential Input Voltage ±Supply Voltage

Voltage at Input/Output Pin (V+ ) + 0.3V, (V− ) − 0.3V

Supply Voltage (V+ − V− ) 16V

Current at Input Pin (Note 12) ±5 mA

Current at Output Pin (Notes 3, 8) ±30 mA

Current at Power Supply Pin 40 mA

Lead Temp. (Soldering, 10 sec.) 260˚C

Storage Temperature Range −65˚C to +150˚C

Junction Temperature (Note 4) 150˚C

Operating Ratings (Note 1)

Supply Voltage 3.0V ≤ V+ ≤ 15.5V

Junction Temperature Range

LMC6462AM, LMC6464AM −55˚C ≤ TJ ≤ +125˚C

LMC6462AI, LMC6464AI −40˚C ≤ TJ ≤ +85˚C

LMC6462BI, LMC6464BI −40˚C ≤ TJ ≤ +85˚C

Thermal Resistance (θJA)

N Package, 8-Pin Molded DIP 115˚C/W

M Package, 8-Pin Surface Mount 193˚C/W

N Package, 14-Pin Molded DIP 81˚C/W

M Package, 14-Pin Surface Mount 126˚C/W

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

Note 2: Human body model, 1.5 kΩ in series with 100 pF. All pins rated per method 3015.6 of MIL-STD-883. This is a class 2 device rating.

Note 3: Applies to both single supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150˚C. Output currents in excess of ±30 mA over long term may adversely affect reliability.

Note 4: The maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(max) − TA)/θJA. All numbers apply for packages soldered directly into a PC board.

Note 5: Typical Values represent the most likely parametric norm.

Note 6: All limits are guaranteed by testing or statistical analysis.

Note 7: V+ = 15V, VCM = 7.5V and RL connected to 7.5V. For Sourcing tests, 7.5V ≤ VO ≤ 11.5V. For Sinking tests, 3.5V ≤ VO ≤ 7.5V.

Note 8: Do not short circuit output to V+, when V+ is greater than 13V or reliability will be adversely affected.

Note 9: V+ = 15V. Connected as Voltage Follower with 10V step input. Number specified is the slower of either the positive or negative slew rates.

Note 10: Input referred, V+ = 15V and RL = 100 kΩ connected to 7.5V. Each amp excited in turn with 1 kHz to produce VO = 12 VPP.

Note 11: Connected as Voltage Follower with 2V step input. Number specified is the slower of either the positive or negative slew rates.

Note 12: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings.

Note 13: Guaranteed limits are dictated by tester limitations and not device performance. Actual performance is reflected in the typical value.

Note 14: For guaranteed Military Temperature Range parameters see RETSMC6462/4X.

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