All Sections: LT - 6

51. ZXRE1004 — Datasheet Diodes
    Datasheets Diodes
    Low knee current 1.22V shunt reference The ZXRE1004 is a 1.22 volt bandgap reference circuit designed for ultra low current operation, typically 4µA. The device is available in a SOT23 surface mount package offering the ultimate in space and ...
    Nov 12, 2024

52. 80 MHz VFC with prescaler and preaccumulator
    Stephen Woodward
    Circuits Analog Devices LT1027
    In 1986, famed analog innovator Jim Williams, in “Designs for High Performance Voltage-to-Frequency Converters” ( Reference 1 ) published his 100 MHz “King Kong” VFC. If anyone’s ever done a faster VFC, I haven’t ...
    Oct 28, 2024

53. Floating output, variable potential battery simulator
    Jim Williams
    Circuits Analog Devices LT1010 LT1012 LT1021
    Battery stack voltage monitor development ( Reference 1 ) is aided by a floating, variable potential battery simulator. This capability permits monitor accuracy verification over a wide range of battery voltage. The floating battery simulator is ...
    Aug 22, 2024
54. Temperature compensated lead acid battery float charger
    Dave Conrad
    Circuits Analog Devices LT1086
    Editor’s note:Battery charging in a float or maintenance mode has been around for a while, especially for standby power, emergency lighting, telecom, uninterruptible power, and other critical power needs. The float method of charging is a ...
    Aug 5, 2024
55. Single cell V-F converter
    Jim Williams
    Circuits Analog Devices LT1017
    High speed and precision are not the only areas where special V-F circuits are needed. Figure 1 shows a circuit which runs from a single 1.5 V cell with only 125 µA current drain. The circuit uses an LT1017 dual micropower comparator in a ...
    Jul 31, 2024
56. High stability quartz stabilized V-F converter
    Jim Williams
    Circuits Analog Devices LM199 LT1001 LT1011 LT1056 LTC1043
    The gain temperature coefficient of conventional V-F circuits is affected by drift in the charge pumping capacitors. Although compensation schemes are employed to minimize the effect of this drift, another approach is required to get significantly ...
    Jul 30, 2024
57. Precision programmable current source uses two ICs
    Pietro Oliva Stefano Salvatori
    Circuits Analog Devices LT1991 LT1995 LT1996
    This Design Idea mates a precision current source IC with precision difference amp chips to create a programmable current source or sink. The resistor-programmable current source/sink in Figure 1 illustrates the basic topology, taking advantage of ...
    Jul 17, 2024
58. How to correctly charge the lithium-ion/lithium-polymer batteries
    Hesam Moshiri
    Articles Linear Technology LTC1733
    Electronic designers must be aware of the ideal charging method, as it increases the battery’s lifetime and enhances its performance. Nowadays Lithium-ion/Lithium-polymer are used extensively in portable electronic devices that are frequently ...
    Jun 18, 2024
59. The elegance of a flyback controller without a dedicated isolated feedback path
    Frederik Dostal
    Articles Analog Devices LT8300
    Figure 1 shows the architecture of a conventional isolated flyback converter. These converters can be found frequently in power classes of up to about 60 W. A supply voltage is converted to an output voltage with the help of a primary-side switch ...
    May 16, 2024
60. Virtual-zener circuit simplifies high-voltage interface
    Philip Lane
    Circuits Analog Devices LT1021
    This design for a photonic switch needs more than approximately 70 V at the cathode of a duo-lateral optical position-sensing device. This voltage gets speedy response at longer wavelengths, such as 980 nm. The circuit uses fast transimpedance ...
    Apr 1, 2024

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