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Using Op-Amp Data Sheets Here we illustrate use of device data sheets for two commonly used operational ampli ers The rst, the LM741, is a general-purpose (low-cost) ampli er; the second, the LMC6061 is a precision CMOS high-input-impedance single-supply ampli er Excerpts from the data sheets are shown below, with some words of explanation Later in this chapter we compare the electrical characteristics of these two op-amps in more detail The complete data sheets can be found in the accompanying CD-ROM
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LM 741 General Description and Connection Diagrams This table summarizes the general characteristics of the op-amp The connection diagrams are shown Note that the op-amp is available in various packages: a metal can package, a dual-in-line package (DIP), and two ceramic dual-in-line options The dual-in-line (or SO) package is the one you are most likely to see in a laboratory Note that in this con guration the integrated circuit has eight connections, or pins: two for the voltage supplies (V + and V ); two inputs (inverting and noninverting); one output; two offset null connections (to be discussed layer in the chapter); and a no-connection pin (NC) LM741 Operational Ampli er General Description The LM741 series are general purpose operational ampli er which feature improved performance over industry standards like the LM709 They are direct, plug-in replacements for the 709C, LM201, MC1439 and 748 in most applications The ampli ers offer many features which make their application nearly foolproof: overload protection on the input and output, no latch-up when the common mode range is exceeded, as well as freedom from oscillations The LM741C/LM741E are identical to the LM741/LM741A except that the LM741C/LM741E have their performance guaranteed over a 0 C to +70 C temperature range, instead of 55 C to +125 C
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Metal Can Package NC 8 Offset null 1
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Ceramic Dual-In-Line Package NC 1 NC 2 14 NC 13 NC 12 NC 11 V + 10 Out 9 Offset null 8 NC
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7 V+ 6 Output
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+ Offset null 3 In 4 + In 5 V 6 NC 7
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Inverting input 2 Non-inverting input 3 4 V
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5 Offset null
Order Number LM741H, LM741H/883*, LM741AH/883 or LM41CH See NS Package Number H08C Dual-In-Line or SO Package Offset null 1 Inverting input 2 Non-inverting 3 input V 4 8 NC 7 V+ 6 Output 5 Offset null
Order Number LM741J-14/883*, LM741AJ-14/883** See NS Package Number J14A
*also available per JM38510/10101 **also available per JM38510/10102
Ceramic Flatpak NC + Offset null Input + Input V 1 2 3 4 5 10 9 8 7 6 NC NC V+ Output Offset null
LM741W
Order Number LM741J, LM741J/883, LM741CM, LM741CN or LM741EN See NS Package Number JO8A, MO8A or NO8E
Order Number LM741W/883 See NS Package Number W10A
(Continued)
12
Operational Ampli ers
(Concluded) LMC 6061 General Description and Connection Diagrams The description and diagram below reveal several similarities between the 741 and 6061 op-amp, but also some differences The 6061 uses more advanced technology, and is characterized by some very desirable features (eg, the very low power consumption of CMOS circuits results in typical supply currents of only 20 A!) You can also see from the connection diagram that pins 1 and 5 (used for offset null connections in the 741) are not used in this IC We return to this point later in the chapter A further point of comparison between these two devices is their (1998) cost: the LM 741 (in quantities of 1,000) costs $032/unit; the LMC 6061 sells for $079/unit, also in quantities of 1,000 or more
LMC6061 Precision CMOS Single Micropower Operational Ampli er General Description The LMC6061 is a precision single low offset voltage, micropower operational ampli er, capable of precision single supply operation Performance characteristics include ultra low input bias current, high voltage gain, rail-to-rail output swing, and an input common mode voltage range that includes ground These features, plus its low power consumption, make the LMC6061 ideally suited for battery powered applications Other applications using the LMC6061 include precision full-wave recti ers, integrators, references, sample-and-hold circuits, and true instrumentation ampli ers This device is built with National s advanced double-Poly Silicon-Gate CMOS process For designs that require higher speed, see the LMC6081 precision single operational ampli er For a dual or quad operational ampli er with similar features, see the LMC6062 or LMC6064 respectively
Features (Typical Unless Otherwise Noted) Low offset voltage 100 V Ultra low supply current 20 A Operates from 45V to 15V single supply Ultra low input bias current 10 fA Output swing within 10 mV of supply rail, 100k load Input common-mode range includes V High voltage gain 140 dB Improved latchup immunity
Applications Instrumentation ampli er Photodiode and infrared detector preampli er Transducer ampli ers Hand-held analytic instruments Medical instrumentation D/A converter Charge ampli er to piezoelectric transducers
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