Circuits & Schematics Analog Devices - 8

71. Add a manual reset to a standard three-pin-reset supervisor
    Derek Vanditmars
    Circuits Supply Microcontrollers Usage Analog Devices ADM809
    Adding a manual reset to a design usually involves designing in a new part with a manual-reset input. But, by adding a couple of low-value resistors, a standard three-pin-reset supervisor can work in most applications. The circuit in Figure 1 ...
    Feb 20, 2023
72. Simple circuit provides high-side current sensing
    B Kazay Martin Ossmann
    Circuits Measurement Supply Analog Devices OP90
    In power supplies or battery chargers, you often need information about the current flowing in the high-side rail. Figure 1 shows a common circuit for obtaining this information. Figure 1. This method for measuring high-side supply current requires ...
    Feb 14, 2023

73. RF-telemetry transmitter features minimal parts count
    Francis Rodes
    Circuits Wireless Measurement Analog Devices LTC1250
    Requirements for portable, short-range telemetry systems frequently include low power consumption, small size, and low cost. The circuit in Figure 1 meets these criteria and uses only three off-the-shelf ICs and a few passive components. Although ...
    Feb 13, 2023
74. Resistive DAC and op amp form hybrid divider
    Marián Štofka
    Circuits Analogue Design Oscillators Analog Devices AD5293 AD8677
    A resistive DAC in a resistive-feedback loop of an op amp lets you create an analog-digital-analog divider. The resistance, R WA , between the W and A terminals of the Analog Devices AD5293 (Figure 1) decreases linearly with increasing the ...
    Feb 6, 2023
75. Transistor ∆VBE-based oscillator measures absolute temperature
    Stephen Woodward
    Circuits Oscillators Measurement Analog Devices LT1009 LTC1043 LTC1150
    On June 12, 2011, the analog EE world lost a star when guru James M. Williams died. Jim’s hundreds of articles, books, and application notes were (and continue to be) a bottomless wellspring of information, inspiration, and the joy of seeing ...
    Jan 10, 2023
76. Precision thermocouple amplifier
    Rajkumar Sharma
    Circuits Measurement Analog Devices MAX31856
    Figure 1. Common view of the Precision Thermocouple Amplifier board. This precision thermocouple sensor module performs cold-junction compensation and digitizes the signal from any type of thermocouple. The output data is formatted in degrees ...
    Dec 23, 2022
77. Impedance Transformer Flags Failed Fuse
    Kevin Ackerley
    Circuits Supply Analog Devices AD8606
    Figure 1 depicts a circuit that detects the opening of a miniature circuit breaker or high-rupture-capability fuse in a high-reliability telecommunications power supply. The circuit generates an alarm when a failure changes the impedance of an ...
    Nov 18, 2022
78. Protect MOSFETs in heavy-duty inductive switched-mode circuits
    Marián Štofka
    Circuits Supply Power Analog Devices ADP3624
    The MOSFET power switch is commonly the most vulnerable part of a new switched-mode high-power circuit. One threat for this device is exceeding the value of the maximum allowed pulse current. You cannot exceed this limit, even for pulse durations ...
    Oct 28, 2022
79. Waveform generator minimizes amplitude dependency
    Marián Štofka
    Circuits Oscillators Analog Devices AD8475 ADA4899-1 ADCMP601 ADG736 ADR431
    Engineers have long used function- generator circuits employing analog integrators and high-hysteresis comparators. The outputs of these circuits often depend on variations in temperature, power-supply voltage, load, and parts. However, you can ...
    Oct 26, 2022
80. Measure humidity and temperature on one TTL line
    Shyam Tiwari
    Circuits Measurement Interfaces Analog Devices AD590JF
    By combining the responses of AD590 temperature sensor and a HS1101 humidity sensor, you can generate a single TTL-level signal containing information from both sensors (Figure 1). This design uses a 74HC123 monostable multivibrator, IC 1 , to form ...
    Sep 22, 2022

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