Diodes: Cheat Sheet

DEPARTMENT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE MASSACHUSETTS INSTITUTE OF TECHNOLOGY CAMBRIDGE, MASSACHUSETTS 02139 Types of Diodes Diode Name Rectifier Diode, Fast Switching Rectifier Signal Diode Used for: Converting AC to DC; Linear and switching power supplies HF rectification, detection Special Characteristics Can be had in very high current capacities, too slow for hf signal use. Small tr = few ns Zener Diode Voltage reference, regulation Used in reverse breakdown Light-emitting Diode [LED] Indication, 7-segment displays VF ‘s vary with color Light detection, mech.electrical conversion; solar cell Electrical isolation Reverse current is increased by light; in FWD direction=solar cell LED and photodiode in an opaque package Schottky Diode VHF rectification, detecting small signals No stored charges, >300 MHz, 0.25V VF [metal jn] Varactor Diode Tuning radio and TV receivers Fairly linear C with VR Varistor AC line spike protection 2 back-back zeners Current Regulator Constant current source Step-recovery Diode “snap” diode generates harmonics, f multipliers Exploits reverse-current phenomenon Back Diode Very small signal rectification VR smaller than VF Tunnel Diode High frequency oscillators Part of forward char. has negative resistance Laser Diode Reading, writing CD, DVD etc. PIN Diode RF switching diode Photodiode Optocoupler Diode types Chart Diode Symbol O 1 of 1 02/07/05 Cite as: Ron Roscoe, course materials for 6.101 Introductory Analog Electronics Laboratory, Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of Technology. Downloaded on [DD Month YYYY]. DIODES VR(max)a (V) Type IR(max)b (µA) PAD-1 45 1pA@20V FJT1100 30 0.001 ID101 30 10pA@10V Continuous Peak VF @ IF (V) (mA) VF @ IF (V) (A) 0.8 0.8 5 Reverse recovery (ns) Capacitance (10V) (pF) Class Comments - - - 0.8 lowest IR Siliconix 1.1 0.05 - 1.2 very low IR 1pA@5V, 10pA@15V 1.1 0.03 - 0.8 very low IR Intersil; dual 10 <1.0 0.2 3000 8.0 low IR 1nA@125V indus std; same as 1N4148 1 1N3595 150 3 0.7 1N914 75 5 0.75 10 1.1 0.1 4 1.3 gen purp sig diode 1N6263 60 10 0.4 1 0.7 0.01 0 1.0 Schottky: low VF 1N3062 75 50 <1.0 b - - 2 0.6 low cap, sig diode 1N4305 75 50 0.6 1 - - 4 1.5 controlled VF 100 50 0.9 1000 2.3 25 3500 15 1000 50 0.9 1000 2.3 25 5000 10 1N5819 40 10000 0.4 1000 1.1 20 - 1N5822 40 20000 0.45 3000 1.3 50 1N5625 400 50 1.1 5000 2.0 50 50 1000 1N4002 1N4007 } 1N1183A 20 1.3 100 1.1 40000 1pF at 0 volts 1-amp rect indus std; 7-member fam 50 pwr Schottky lead mounted - 180 pwr Schottky lead mounted 2500 45 5-amp rect lead mounted high curr rect 1N1183RA reverse - - o (a) VR(max) is repetitive peak reverse voltage, 25 C, 10µA leakage. (b) IR(max) is reverse leakage current at VR and 100oC ambient temperature. Figure by MIT OpenCourseWare. Cite as: Ron Roscoe, course materials for 6.101 Introductory Analog Electronics Laboratory, Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of Technology. Downloaded on [DD Month YYYY]. Circuit Input/Output Basic Negative Series Clipper RL Vin Vin RL 0V Vin + DC - -V 0V RL VRL Output +Vpk = 0 V -Vpk = - Vin- (-0.7 V) -V +V 0V VRL 0 V Vin DC + +V -V +V RL Biased Positive Series Clipper Vin -Vpk = 0 V Vin Biased Negative Series Clipper Vin +V 0V VRL Output +Vpk = + Vin pk -0.7 V VRL Basic Positive Series Clipper Vin +V 0V -V +V 0V -V 0V -V Output +Vpk = Vin pk -0.7 V -Vpk = + VDC Output +Vpk = -VDC -Vpk = -Vin - (-0.7 V) Diode Series Clipper Circuits. Figure by MIT OpenCourseWare. Cite as: Ron Roscoe, course materials for 6.101 Introductory Analog Electronics Laboratory, Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of Technology. Downloaded on [DD Month YYYY]. Circuit Input/Output Basic Negative Shunt Clipper Vin Rs RL Basic Positive Shunt Clipper Vin Rs RL Biased Negative Shunt Clipper Vin Rs - DC RL + Biased Positive Shunt Clipper Vin Rs + DC - RL Variable Shunt Clipper Vin +V R1 Rs RL Output Vin 0V VRL +V 0V Vin +V 0V VRL +Vpk = 0V VRL 0V Vin 0V VRL 0V Vin 0V VRL 0V Vin 0V Output +Vpk = +0.7 V RL -Vpk = RS+RL RL VRL 0V Vin 0V VRL 0V RL Vin pk RL+RS -Vpk = (-VDC) + (-0.7 V) +Vpk = Output +Vpk = VDC + 0.7 V -Vpk = RL -Vpk = -Vin pk Output VZ VF Vin 0V VRL 0V +Vpk = +VZ -Vpk = -0.7 V Output VF Symmetrical Zener Shunt Clipper RL (-Vin pk) +Vpk = R1 adjustable VZ Vin RL RL+RS Output Zener Shunt Clipper (+Clipped, -Zenered) Vin (-Vin pk ) Output Zener Shunt Clipper (-Clipped, +Zenered) Vin Vin pk -Vpk = -0.7 V 0V -V Vin RL RS+RL +Vpk = +0.7 V -Vpk = -VZ Output +Vpk = VZ + 0.7 V -Vpk = (-Vz) + (-0.7 V) Diode Shunt Clipper Circuits. Figure by MIT OpenCourseWare. Cite as: Ron Roscoe, course materials for 6.101 Introductory Analog Electronics Laboratory, Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of Technology. Downloaded on [DD Month YYYY]. Circuit Input/Output Negative Clamper Vin Vin RL VRL +V 0V Output -V +Vpk = +0.7 V 0V -Vpk = -Vin pk-pk -V Positive Clamper Vin Vin RL +V 0V -V VRL +V Output +Vpk = +Vin pk-pk -Vpk = -0.7 V 0V Diode Clamper Circuits. Figure by MIT OpenCourseWare. Cite as: Ron Roscoe, course materials for 6.101 Introductory Analog Electronics Laboratory, Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of Technology. Downloaded on [DD Month YYYY].