LM13700AN National Semiconductor, LM13700AN Datasheet
LM13700AN
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LM13700AN Summary of contents
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... ABC superior to that of the LM13600 in audio applications. Features n g adjustable over 6 decades m Connection Diagram Dual-In-Line and Small Outline Packages Order Number LM13700M, LM13700N or LM13700AN © 1999 National Semiconductor Corporation DS007981 n Excellent g linearity m n Excellent matching between amplifiers n Linearizing diodes n High impedance buffers ...
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... Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. ± Note 2: For selections to a supply voltage above www.national.com (Note 1) Operating Temperature Range LM13700N, LM13700AN DC Input Voltage Storage Temperature Range Soldering Information Dual-In-Line Package ± ...
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Electrical Characteristics (Note 5) (Continued) Note 3: For operation at ambient temperatures above 25˚C, the device must be derated based on a 150˚C maximum junction temperature and a thermal resistance, junction to ambient, as follows: LM13700N, 90˚C/W; LM13700M, 110˚C/W. Note ...
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Typical Performance Characteristics Peak Output Current DS007981-41 Input Leakage DS007981-44 Amplifier Bias Voltage vs Amplifier Bias Current DS007981-47 www.national.com (Continued) Peak Output Voltage and Common Mode Range DS007981-42 Transconductance DS007981-45 Input and Output Capacitance DS007981-48 4 Leakage Current DS007981-43 Input ...
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Typical Performance Characteristics Distortion vs Differential Input Voltage DS007981-50 Leakage Current Test Circuit Circuit Description The differential transistor pair Q and Q form a transcon ductance stage in that the ratio of their collector currents is defined by ...
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Circuit Description (Continued) Q and Q , all transistors and diodes are identical in size Transistors Q and Q with Diode D form a current mirror which forces the sum of currents I and I ...
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Applications: Voltage Controlled Amplifiers (Continued) maximizes their linearizing action when balanced against value recommended for cific application demands otherwise. FIGURE 2. Voltage Controlled Amplifier FIGURE 3. Equivalent VCA Input Circuit ...
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Stereo Volume Control www.national.com (Continued) FIGURE 4. Stereo Volume Control FIGURE 5. Amplitude Modulator 8 DS007981-11 DS007981-12 ...
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Stereo Volume Control (Continued) Noting that the gain of the LM13700 amplifier of Figure 3 may be controlled by varying the linearizing diode current I as well as by varying I , Figure 7 shows an AGC Amplifier ABC using ...
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Voltage Controlled Resistors FIGURE 8. Voltage Controlled Resistor, Single-Ended FIGURE 9. Voltage Controlled Resistor with Linearizing Diodes Voltage Controlled Filters OTA’s are extremely useful for implementing voltage con- trolled filters, with the LM13700 having the advantage that the required buffers ...
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Voltage Controlled Filters FIGURE 10. Floating Voltage Controlled Resistor FIGURE 11. Voltage Controlled Low-Pass Filter (Continued) 11 DS007981-17 DS007981-18 www.national.com ...
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Voltage Controlled Filters FIGURE 12. Voltage Controlled Hi-Pass Filter FIGURE 13. Voltage Controlled 2-Pole Butterworth Lo-Pass Filter www.national.com (Continued) 12 DS007981-19 DS007981-20 ...
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Voltage Controlled Filters FIGURE 14. Voltage Controlled State Variable Filter Voltage Controlled Oscillators The classic Triangular/Square Wave VCO of Figure 15 is one of a variety of Voltage Controlled Oscillators which may be built utilizing the LM13700. With the component ...
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Voltage Controlled Oscillators www.national.com (Continued) FIGURE 15. Triangular/Square-Wave VCO FIGURE 16. Ramp/Pulse VCO 14 DS007981-22 DS007981-23 ...
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Voltage Controlled Oscillators Figure 18 shows how to build a VCO using one amplifier when the other amplifier is needed for another function. FIGURE 18. Single Amplifier VCO (Continued) FIGURE 17. Sinusoidal VCO Additional Applications Figure 19 presents an interesting ...
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Additional Applications The operation of the multiplexer of Figure 20 is very straight- forward. When A1 is turned on it holds V when A2 is supplied with bias current then it controls V and R serve to stabilize the unity-gain ...
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Additional Applications (Continued) The Schmitt Trigger of Figure 22 uses the amplifier output current into R to set the hysteresis of the comparator; thus = Varying I will produce a Schmitt Trigger with ...
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Additional Applications Figure 23 shows a Tachometer or Frequency-to-Voltage con- verter. Whenever A1 is toggled by a positive-going input, an amount of charge equal to (V – sourced into This once ...
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Additional Applications (Continued) DS007981-32 FIGURE 25. Sample-Hold Circuit FIGURE 26. Ramp and Hold 19 DS007981-33 www.national.com ...
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Additional Applications The circuit of Figure voltage reference of variable Temperature Coefficient. The 100 k potentiometer adjusts the output voltage which has a positive TC above 1.2V, zero TC at about 1.2V, and negative TC below 1.2V. ...
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Additional Applications (Continued) FIGURE 28. Delta VBE Reference FIGURE 29. Pulse Width Modulator 21 DS007981-35 DS007981-36 www.national.com ...
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Additional Applications www.national.com (Continued) FIGURE 30. Logarithmic Current Source 22 DS007981-37 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM13700N or LM13700AN S.O. Package (M) Order Number LM13700M NS Package Number M16A Molded Dual-In-Line Package (N) NS Package Number N16A 23 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...