Circuits & Schematics Analog Devices

1. Fast response 1 Hz to 2.5 MHz V-F converter
   Jim Williams
   Circuits Measurement Analog Devices LT1004 LT319A LTC1052 LT1056
   Figure 1’s circuit is not as fast as some other circuits, but its 2.5 MHz output settles from a full-scale input step in only 3 us. This makes the circuit a good candidate for FM applications or any area where fast response to input movement ...
   May 14, 2025
2. LM4041 voltage regulator impersonates precision current source
   Stephen Woodward
   Circuits Supply Analog Devices LM4041
   The LM4041 has been around for over 20 years. During those decades, while primarily marketed as a precision adjustable shunt regulator, this classic device also found its way into alternative applications. These include voltage comparators, ...
   Apr 27, 2025

3. Water-leak detector uses 9V batteries
   Yongping Xia
   Circuits Measurement Analog Devices MAX934
   A previously published Design Idea describes a practical gadget that has the potential to save a lot with little investment ( Reference 1 ). However, the circuit uses 120 V line voltage and, as such, it is not that convenient for many applications. ...
   Apr 18, 2025
4. White-LED driver provides 64-step logarithmic dimming
   Will Hadden
   Circuits Supply Light Analog Devices MAX1573 MAX4480
   The circuit of Figure 1 is designed for portable-power applications that require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as many as four white LEDs from a 3.3 V source and adjusts the total LED current from 1 to ...
   Apr 14, 2025
5. Test technique quantifies jitter of discrete-comparator design
   Tim Davis
   Circuits Measurement Analog Devices AD8220 ADR5041 LT1634 LT3081 REF195
   A colleague asked for the measured jitter number on a single-supply comparator design based on the LM359 IC ( Ref. 1 ). He wanted to know how the jitter performance of the discrete comparator compared to an IC comparator, which was used with an ...
   Apr 9, 2025
6. Design an RTD interface with a spreadsheet
   Robert S. Villanucci
   Circuits Analogue Design Measurement Analog Devices AD633 OP177
   RTDs (resistance-temperature detectors) are the preferred sensor choices for designs requiring precision. Although RTDs are approximately linear over the limited temperature range of 0 to 100 C, these sensors exhibit a slight but progressively more ...
   Feb 25, 2025
7. Resistive dummy load draws constant current from 1.2 to 50 V
   John Guy
   Circuits Measurement Supply Analog Devices MAX480 MAX6006A
   This dummy-load circuit has been in use at Maxim for more than 10 years (see the Figure 1). It's useful for testing power supplies and power amplifiers as well as drivers for LEDs, relays, and solenoids. Plus, it overcomes the limitations of ...
   Dec 26, 2024
8. Expanding output range of step-up converter
   Peter Demchenko
   Circuits Supply Analog Devices ADP1611
   This is one real-life quest: How do we increase the output voltage of a step-up converter? If you have unlimited access to the right ICs, you are one lucky dog, but what if you don’t? Or maybe you are limited to a specific chip due to ...
   Dec 17, 2024
9. Adjust tempco in size and sign
   Michael Wyatt
   Circuits Analogue Design Tools and Technologies Analog Devices AD590KR
   Zeroing out temperature variations on a production line is a challenging task when the device to be compensated has a temperature coefficient that varies in both magnitude and sign from unit to unit. This simple circuit can meet the challenge (see ...
   Dec 13, 2024
10. Precise photovoltaic I-V characterization
    Aaron Schultz Catherine Chang Henry Surtihadi
    Circuits Measurement Analog Devices LTC2058
    Introduction Photovoltaic (PV) modules are popular and affordable sources of renewable energy. Most photovoltaic modules last about 20 years, but thermal stress and moisture ingress, among other causes, can degrade a module’s output power ...
    Nov 6, 2024

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