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Phys 105 Special Purpose Chips/IC’s 11/10/09 Introductory Notes: Integrated Circuit Nomenclature: each manufacturer has an alpha prefix, followed by a number. Many manufacturers may make the same part, after the original patent has expired. For example, LM741 and AD741 are the same opamp, manufactured by National Instruments and Analog Devices, respectively. They are entirely interchangeable. See the attached Phys 105 Parts Inventory list for a key to the main ones. Datasheets for the parts listed here are posted on Coursework, or can be accessed directly at http://www.stanford.edu/class/archive/physics/physics105/physics105.2002/datasheets/ Note there are several subcategories which are mostly self-explanatory. The ones that aren’t: a) Optoelectronics: light sources (LED’s) and detectors (phototransistor). Our phototransistor is the SDP-8405. There is also on SDP-8406 which is equivalent, but is a flat, rather than cylindrical, geometry. b) Linear IC’s: in electronics, linear = analog , meaning most of the IC’s you will use. 1. 7555 or TS555 timer – the most popular timing chip around, very flexible. Can be made to oscillate, pulse, or simply time things. The LM555 or NE555 are BJT versions. Improved, CMOS(FET) versions are: usually noted 7555 (we have the ICM Intersil version), but there are also LMC555 and TS555 in the lab. Use the CMOS version. Operation is explained in Section 5.14, Horowitz and Hill (the big reference), p. 286ff. The inputs to this chip are digital – you give them a hi or lo signal. However, the definitions of hi and lo are: a. Hi = >2/3 VDD where VDD is the positive rail, in digital CMOS-speak b. Lo = <1/3 VDD So when the spec sheet speaks of a negative-going pulse, it means going from high to low; it does not mean going from positive to negative voltage. IMPORTANT: do not give it an input below ground – it will permanently lock up the gates inside and be useless, even though it won’t look fried from the outside. See Class/Lab 10 in your Lab Manual, esp Lab parts 10-3, 10-4 2. DG403 Analog Switch: the chip of choice when using a digital signal to turn an analog signal on/off, such as you need to do in the Design Project. This is a dual SPDT switch. Dual means two separate switches on one chip, SPDT = single pole, double throw – the switch opens one set of contacts and simultaneously closes another. We also have quad (DG413) and single (419) versions. The single is smaller and saves real estate on the breadboard if you only need one switch. See Lab Manual, Class 11, p246, and Lab 11-1B p 259 to learn how to use it. 3. ICL 8038 Function generator on a chip build your own oscillator 4. LM358 Single Sided Op Amp – for battery operation – needs only a (+) rail5. LM3915/3916 LED Display driver – takes an analog input and drives an LED “ladder” display, below. Higher input, more LED’s are lit. You’ve seen it before. 6. DC-10EWA 10 LED’s in a ladder display. We also have different colors. 7. AD633 4-quad multiplier – for AM modulation – the proper way to multiply two signals. Also used for demodulation at the receiver. 4-quad means either signal can be positive or negative, i.e. in any quadrant. This was not true of your FET modulator in Lab 6. 8. AD622 Difference Amplifier, also called an Instrumentation Amp, a good way to subtract two signals. 9. LM386 Audio Power Amplifier a complete amplifier on a chip. Takes a (very small) input, amplifies it so it can drive an 8 ohm speaker. If you use this, change your speaker to an 8ohm version. 10. Dual/Quad chips: –multiple opamps or comparators on one chip – saves real estate on your board: a. LM348, HA4741: quad 741 b. LF412/LF347: dual/quad 411 c. LM319/339: dual/quad 311 d. NE558: quad 555 timer (BJT) 11. 7-segment display: digital digits are formed from 7 --count ‘em -- segments, either LED’s or LCD’. A chip that drives a 3-digit 7-segment display is the ICL7107. Takes an analog voltage input and has 21 outputs for the 3 digits. Double-black-diamond tricky to use. 12. Power Transistors: 2N4401/03, TIP31/32, TIP41/42 - NPN/PNP pairs for driving the speaker. If you do a push pull or other transistor follower, don’t use the 2N3904/3906 – these don’t have enough oomph. 13. 1N914/1N4148 Diodes – use these if you need a diode that can follow your audio signal. Called “signal” diodes, they’re designed for low power and high frequencies. The 1N400X diodes you used earlier in the course are called rectifiers, and are for higher power and low frequency. In the diode world, signal diodes are the fast, sleek race horses, rectifiers are the heavy mules. 14. Sample and Hold/Peak Detector – not a chip but a circuit design that will save the highest value of a voltage until you reset it. See Lab Manual Ch 11 and Lab 11-5Phys105 Parts Inventory12-Nov-09$ = try to be a little carefulwith these IC'sLM 311 comparatorLM 319 dual comparatorLM 324 quad BJT op amp--single supply (battery)$ LM 331 voltage controlled oscillator (VCO)LM 339 quad comparator --single supply (battery)LF 347 quad 411 (JFET op amp)LM 348 quad 741 (BJT op amp)LF 356 JFET Op ampLM 358 dual BJT op amp--single supply (battery)$ LM 386N-3 audio power amplifier. 0.5W$ DG 403 CMOS Analog Switch -- dualLF 411 JFET Op ampLF 412 dual 411$ DG 413 CMOS Analog Switch -- quad (SPST)$ DG 419 CMOS Analog Switch -- single (SPDT)LM, NE 555 Timer (BJT--see 7555 for better CMOS version)TS, LMC 555 CMOS version of 555$ LM 565 PLL (phase-locked loop)$ LM 566 VCO (Voltage Controlled Oscillator)NE 558 Quad timer (BJT)$$ AD 622 Instrumentation amplifier (difference amp) $$ AD 633 analog multiplierLM, AD 741 Op Amp (also HA 17-741)MC 1455 same as 555$ LM, MC 1496 Balanced Modulator/Demodulator (for AM)LM3909 LED FlasherLM 3915 LED display driver LM 3916 LED display driver HA, RC, uPC 4741 quad 741ICM 7555 CMOS Timer (also TS555, LMC555)ICM 7556 Dual 7555$$ ICL 7107 7-seg LED driver, A/D converter$$ ICL 8038 function generator on a chipSN74143 7-seg display driver, BCDDiscontinued (but still around)LM 710 OpAmp comparatorIC Mfg'r. Codes: LM/LF— National Semiconductor: www.national.com ICL/ICM, CA, CD — Intersil: www.intersil.com (CA is old RCA designation) HA — Harris, now part of Intersil, or Hitachi MC — www1.motorola.com; some products have been spun off to:(On Semiconductor, www.onsemi.com/pub/prod)


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Stanford PHYSICS 105 - Special Purpose Chips - IC’s

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