App note from Maxim Integrated creating voltage negative reference from charge-pump inverter plus positive voltage reference combo. Link here (PDF) This application note discusses how to build a negative voltage reference without using external resistors or a negative supply by simply combining a simple charge-pump inverter and a positive output voltage reference.
Tag Archives: Voltage reference
App note: Nonvolatile STANDBY/ON Switch
Power status recovery in this application note from Maxim Integrated. Link here (PDF) Using an electronically programmable voltage reference (DS4305) as a single-bit nonvolatile memory cell, this circuit remembers the state of a STANDBY/ON switch that changes state with no operator present.
App note: Voltage reference long-term stability reduces industrial process control calibration costs
Application note from Maxim Integrated about improved long term stability of their voltage references. Link here (PDF) Large industrial plants such as those in the oil, gas, electricity, pharmaceutical, and food and beverage industries rely on electronic instrumentation to provide accurate, stable measurements to control their processes. The stability of an instrument very much depends […]
App note: Voltage reference calibration and voltage ADC usage
An app note from Atmel, voltage reference calibration and voltage ADC usage (PDF!): Features • Voltage reference calibration. – 1.100V +/-1mV (typical) and < 90ppm/°C drift from –10°C to +70°C. • Interrupt controlled voltage ADC sampling. • Calculation of voltage and temperature from voltage ADC measurements. Some of the new Atmel AVR Smart Battery devices contain […]
A look inside a ’70s voltage and current standard
SQKYBeaver did a teardown of a Techtron Standards type 51 voltage and current standard: Absolutely amazing inside! The wires to the front panel look like the were loomed by a professional Spacecraft mechanic. every one individually numbered it must have taken hours. only 4 rc4136 quad opamps for all this functionality, two dating back to 1973.
Voltage reference project
SUF shared his voltage reference project in the forum: To achieve the things above I designed a small battery good indicator circuit with a zener an opamp two LEDs and a few resistors. If you switch it on and the battery fall below 8V the red LED will lit instead of the green. I wanted to […]
Erl’s voltage reference
Erl shared his voltage reference project in the forum: I had almost 6 x 6 cm left over on a 10 x 10 board I was ordering from Seeed Studios, so inspired by the Mr. Ref voltage reference project, I made something similar. It’s based on the MAX6126 2.048 V reference, uses 3 AAA […]
App note: Voltage reference circuit collection
Here is a voltage reference circuit collection from Linear Technology. This is a 32 page article with a ton of reference designs and specifications for each. How to select passive components for best performance is also covered.