PDF LMC660 Data sheet ( Hoja de datos )

Número de pieza	LMC660
Descripción	CMOS Quad Operational Amplifier
Fabricantes	National Semiconductor
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No Preview Available ! June 2006 LMC660 CMOS Quad Operational Amplifier General Description The LMC660 CMOS Quad operational amplifier is ideal for operation from a single supply. It operates from +5V to +15.5V and features rail-to-rail output swing in addition to an input common-mode range that includes ground. Perfor- mance limitations that have plagued CMOS amplifiers in the past are not a problem with this design. Input VOS, drift, and broadband noise as well as voltage gain into realistic loads (2 kΩ and 600Ω) are all equal to or better than widely accepted bipolar equivalents. This chip is built with National’s advanced Double-Poly Silicon-Gate CMOS process. See the LMC662 datasheet for a dual CMOS operational amplifier with these same features. Features n Rail-to-rail output swing n Specified for 2 kΩ and 600Ω loads n High voltage gain: 126 dB n Low input offset voltage: 3 mV n Low offset voltage drift: 1.3 µV/˚C n Ultra low input bias current: 2 fA n Input common-mode range includes V− n Operating range from +5V to +15.5V supply n ISS = 375 µA/amplifier; independent of V+ n Low distortion: 0.01% at 10 kHz n Slew rate: 1.1 V/µs Applications n High-impedance buffer or preamplifier n Precision current-to-voltage converter n Long-term integrator n Sample-and-Hold circuit n Peak detector n Medical instrumentation n Industrial controls n Automotive sensors Connection Diagram 14-Pin SOIC/MDIP LMC660 Circuit Topology (Each Amplifier) 00876701 00876704 © 2006 National Semiconductor Corporation DS008767 www.national.com 1 page Typical Performance Characteristics VS = ±7.5V, TA = 25˚C unless otherwise specified. Supply Current vs. Supply Voltage Offset Voltage Input Bias Current 00876724 00876725 Output Characteristics Current Sinking 00876726 Output Characteristics Current Sourcing 00876727 Input Voltage Noise vs. Frequency 00876728 5 00876729 www.national.com 5 Page Typical Single-Supply Applications (V+ = 5.0 VDC) Additional single-supply applications ideas can be found in the LM324 datasheet. The LMC660 is pin-for-pin compatible with the LM324 and offers greater bandwidth and input resistance over the LM324. These features will improve the performance of many existing single-supply applications. Note, however, that the supply voltage range of the LMC660 is smaller than that of the LM324. Low-Leakage Sample-and-Hold Sine-Wave Oscillator 00876707 Instrumentation Amplifier 00876709 Oscillator frequency is determined by R1, R2, C1, and C2: fosc = 1/2πRC, where R = R1 = R2 and C = C1 = C2. This circuit, as shown, oscillates at 2.0 kHz with a peak-to- peak output swing of 4.5V. 1 Hz Square-Wave Oscillator If R1 = R5, R3 = R6, and R4 = R7; then 00876708 ∴ AV ≈100 for circuit shown. For good CMRR over temperature, low drift resistors should be used. Matching of R3 to R6 and R4 to R7 affect CMRR. Gain may be adjusted through R2. CMRR may be adjusted through R7. Power Amplifier 00876710 00876711 11 www.national.com 11 Page

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