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Compare this operational amplifier K2-W to the more modern ADA4523-1; under what conditions would each be the best choice?

Compare this operational amplifier K2-W to the more modern ADA4523-1; under what conditions would each be the best choice?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Compare this operational amplifier K2-W to the more modern ADA4523-1; under what
conditions would each be the best choice?

K2-W Picture Given in submission 

ADA4523-1 Link: https://www.analog.com/en/products/ada4523-1.html

Gain: SWANGEORGE A PHILBRICK RESEARCHES. INC.. 127 CLARENDON STREET. BOSTON, MASS. GAP/R MODEL K2-W 15,000 dc open loop ELECTRICAL Response: 2 μsec rise time with bandwidth over 100 kc when used as an inverter Drift Rate: £5 mv per day referred to the input Differential Input Levels: Voltage (Inputs together): -50 to +50 volts Current: Base: Either input less than 10 amp. (Insulation leakage and grid current) Impedance (either input): Above 100 M (open grid) Capacitance (Pin I grounded): 7 μμf Bias Required for Balance: Adjustable from 0.9 to 1.7 volts between Pin 1 and 2 (Pin 1 positive with respect to Pin 2). GENERAL Temperature: Max. allowable case temp. (hot spot) +65°C(149°F) Tube Complement: 2 12AX7A or 7025 Octal Plug Casing: Molded plastic, sealed unit CHARACTERISTICS OPERATIONAL SYMBOL IN Output Capabilities: Output Design Voltage Center +50V OV -50V Impedance: Load No load Full load (50K) Output Current (Steady State) W +2.0 ma +1.8 ma -2.4 ma -1.8 ma -1.0 ma Open loop-below 1K CHARACTERISTICS Max. Power Required (worst case): *6.3 vac or vdc Min. +1.0 ma OUT ma Supply Output Output Voltage +SOV -SOV vdc +300 +5.4 +4.1 -300 -4.7 -3.8 +300 +6.4 +3.1 <-300 -4.7 -3.8 6.3* 0.6 0.6 amp amp Installed: 3.0 oz. Packed: 5.6 oz. Dimensions: (Above socket) 13304" x 24" x 44" b (max) Weight: GENERAL DESCRIPTION The Model K2-W Operational Amplifier is a high gain plug-in unit designed and constructed for use as a basic subassembly. With these units, feedback computing de- vices of all speeds can be assembled with a minimum of external circuitry. A schematic diagram of the K2-W is shown in figure 4. The K2-W features balanced differential inputs for low drift, high input impedance, low output impedance, high performance, and economy of operation. Its range of operation is from d-c to above 100 kc. With appropriate feedback connections, the K2-W maintains the two inputs at nearly equal potentials. The residual offset can readily be biased out. (See BIASING METHODS.) Model K2-W Operational Amplifier APPLICATIONS In general terms, the field of application of the K2-W is in measurements and active transformations in the range from d-c to over 100 kc. It is primarily intended for use in feedback opera- tions, fidelity of output depending upon the choice of external circuit components and arrangements. The K2-W is especially useful for the construction of electronic analog computor circuits, such as the GAP/R Analog Components, and for the assembly of operating control circuitry. With appro- priate external circuitry, it will readily perform such feedback operations as addition, subtraction, integration, differentiation, multiplication, division, inversion, impedance-conversion, and the injection of current. A few typical examples of fundamental applications are illus- trated in figure 2. SAIN -6 -Ge R fe-eldt lel WIDE-RANGE AMPLIFIER The usual feedback and feed-for- ward resistors are here embodied in a single potentiometer. A voltage gain of minus one is given by the central setting. VOLTAGE REPRODUCER This exceedingly simple arrange- ment supplies the need for a "fol- lower without attenuation or distortion, and with an output im- pedance well below one ohm. ADDER-SUBTRACTOR A number of simpler and possibly more familiar circuits are special cases of this one. By using unequal resistors, a more general form of linear combination is made possible. SUBTRACTING INTEGRATOR A positive or negative integral may be obtained by grounding one input. Unless an integrator is in a stable loop it must be subjected to some sort of "clamping". STABLE DIFFERENTIATOR The smaller shunt capacitor will prevent ringing or singing, and in- troduces very little error. In certain difficult cases one might also add a small resistor in series with the in- put capacitor. ABSOLUTE-VALUE CIRCUIT Reversing both diodes will reverse the sign of the output. To the ac power engineer is simply a "full wave rectifier", but as a computing device it is useful in a much wider sense. Figure 2. Typical Applications of the K2-W Operational Amplifier The values of the various resistance and capacitance elements shown in the above connections may be selected over an ex- tremely wide range. It is suggested that resistors be kept between 50 K and 2 megohms. As for capacitance, a realistic range would be from 100 μuf to 10 μf.
Transcribed Image Text:Gain: SWANGEORGE A PHILBRICK RESEARCHES. INC.. 127 CLARENDON STREET. BOSTON, MASS. GAP/R MODEL K2-W 15,000 dc open loop ELECTRICAL Response: 2 μsec rise time with bandwidth over 100 kc when used as an inverter Drift Rate: £5 mv per day referred to the input Differential Input Levels: Voltage (Inputs together): -50 to +50 volts Current: Base: Either input less than 10 amp. (Insulation leakage and grid current) Impedance (either input): Above 100 M (open grid) Capacitance (Pin I grounded): 7 μμf Bias Required for Balance: Adjustable from 0.9 to 1.7 volts between Pin 1 and 2 (Pin 1 positive with respect to Pin 2). GENERAL Temperature: Max. allowable case temp. (hot spot) +65°C(149°F) Tube Complement: 2 12AX7A or 7025 Octal Plug Casing: Molded plastic, sealed unit CHARACTERISTICS OPERATIONAL SYMBOL IN Output Capabilities: Output Design Voltage Center +50V OV -50V Impedance: Load No load Full load (50K) Output Current (Steady State) W +2.0 ma +1.8 ma -2.4 ma -1.8 ma -1.0 ma Open loop-below 1K CHARACTERISTICS Max. Power Required (worst case): *6.3 vac or vdc Min. +1.0 ma OUT ma Supply Output Output Voltage +SOV -SOV vdc +300 +5.4 +4.1 -300 -4.7 -3.8 +300 +6.4 +3.1 <-300 -4.7 -3.8 6.3* 0.6 0.6 amp amp Installed: 3.0 oz. Packed: 5.6 oz. Dimensions: (Above socket) 13304" x 24" x 44" b (max) Weight: GENERAL DESCRIPTION The Model K2-W Operational Amplifier is a high gain plug-in unit designed and constructed for use as a basic subassembly. With these units, feedback computing de- vices of all speeds can be assembled with a minimum of external circuitry. A schematic diagram of the K2-W is shown in figure 4. The K2-W features balanced differential inputs for low drift, high input impedance, low output impedance, high performance, and economy of operation. Its range of operation is from d-c to above 100 kc. With appropriate feedback connections, the K2-W maintains the two inputs at nearly equal potentials. The residual offset can readily be biased out. (See BIASING METHODS.) Model K2-W Operational Amplifier APPLICATIONS In general terms, the field of application of the K2-W is in measurements and active transformations in the range from d-c to over 100 kc. It is primarily intended for use in feedback opera- tions, fidelity of output depending upon the choice of external circuit components and arrangements. The K2-W is especially useful for the construction of electronic analog computor circuits, such as the GAP/R Analog Components, and for the assembly of operating control circuitry. With appro- priate external circuitry, it will readily perform such feedback operations as addition, subtraction, integration, differentiation, multiplication, division, inversion, impedance-conversion, and the injection of current. A few typical examples of fundamental applications are illus- trated in figure 2. SAIN -6 -Ge R fe-eldt lel WIDE-RANGE AMPLIFIER The usual feedback and feed-for- ward resistors are here embodied in a single potentiometer. A voltage gain of minus one is given by the central setting. VOLTAGE REPRODUCER This exceedingly simple arrange- ment supplies the need for a "fol- lower without attenuation or distortion, and with an output im- pedance well below one ohm. ADDER-SUBTRACTOR A number of simpler and possibly more familiar circuits are special cases of this one. By using unequal resistors, a more general form of linear combination is made possible. SUBTRACTING INTEGRATOR A positive or negative integral may be obtained by grounding one input. Unless an integrator is in a stable loop it must be subjected to some sort of "clamping". STABLE DIFFERENTIATOR The smaller shunt capacitor will prevent ringing or singing, and in- troduces very little error. In certain difficult cases one might also add a small resistor in series with the in- put capacitor. ABSOLUTE-VALUE CIRCUIT Reversing both diodes will reverse the sign of the output. To the ac power engineer is simply a "full wave rectifier", but as a computing device it is useful in a much wider sense. Figure 2. Typical Applications of the K2-W Operational Amplifier The values of the various resistance and capacitance elements shown in the above connections may be selected over an ex- tremely wide range. It is suggested that resistors be kept between 50 K and 2 megohms. As for capacitance, a realistic range would be from 100 μuf to 10 μf.
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