DATASHEET MAX038 PDF

This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. The circuit includes an auto ranging as well as reset switch and produces very accurate and stable readings. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. It is a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc.

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The output amplitude is fixed at 2VP-P, symmetrical around ground, for all output waveforms. OUT has an output resistance of under 0.

REF is a stable 2. It can also be used for other applications external to the MAX Bypass REF with nF to min- imize noise. The MAX produces a stable output frequency over time and temperature, but the capacitor and resistors that determine frequency can degrade performance if they are not carefully chosen. Capacitors should be chosen for low temperature coefficient over the whole tempera- ture range. NPO ceramics are usually satisfactory. Polarized capacitors are generally not recommended because of their outrageous tem- perature dependence and leakage currents , but if they are used, the negative terminal should be connected to COSC and the positive terminal to GND.

Large-value capacitors, necessary for very low frequencies, should be chosen with care, since potentially large leakage currents and high dielectric absorption can interfere with the orderly charge and discharge of CF. If possi- ble, for a given frequency, use lower IIN currents to reduce the size of the capacitor. The SYNC output is a square wave whose rising edge coincides with the output rising sine or triangle wave as it crosses through 0V.

This spike is difficult to see with oscilloscopes having less than MHz band- width. The inductance and capacitance of IC sockets tend to amplify this effect, so sockets are not recom- mended when SYNC is on. RPD sets the gain of the phase detector, while the capacitor attenuates high-frequency components and forms a pole in the phase-locked loop filter.

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