This circuit can be thus used for making simple speedometers for 2 wheelers including bicycles etc. The discussed IC can be also used for achieving simple, inexpensive yet accurate frequency meters at home, using voltmeters for reading the output conversion. This is another excellent IC series which can be used for a multitude of different circuit applications. Basically it's a frequency to voltage converter tachometer IC with many interesting features.
Let's learn more. The pinouts details of the various available packages of the IC LM and LM can be witnessed in the below given images:. Another simple frequency to voltage converter can be seen in the above circuit diagram, using a single IC LM For more info, you can refer to this article. If you have any circuit related query, you may interact through comments, I'll be most happy to help! Your email:. Your email address will not be published. Notify me via e-mail if anyone answers my comment.
You'll also like: 1. Then can we convert high voltages into the frequency in similar way? Higher full-scale frequencies or longer count intervals can be used for higher resolution conversions.
The AD has a useful dynamic range of six decades allowing extremely high resolution measurements. Even at 1 MHz full scale, linearity is guaranteed less than ppm 0. In addition to analog-to-digital conversion, the AD can be used in isolated analog signal transmission applications, phased locked-loop circuits, and precision stepper motor speed controllers. The input signal range and full-scale output frequency are user-programmable with two external capacitors and one resistor.
Input offset voltage can be trimmed to zero with an external potentiometer. ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.
International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing. The package for this IC i. An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.
For detailed drawings and chemical composition please consult our Package Site. Pin Count is the number of pins, balls, or pads on the device. This is the acceptable operating range of the device. The various ranges specified are as follows:. Indicates the packing option of the model Tube, Reel, Tray, etc. This is the date Analog Devices, Inc. Most orders ship within 48 hours of this date.
Once an order has been placed, Analog Devices, Inc. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. In this circuit, lm is used to convert frequency into voltage. The voltage on the output is proportional to the frequency at the input.
It is an 8 pins IC. The source is connected to pin 8 and supplies 15V DC. Pins 3 and 4 are connected to ground. The input frequency is given at pin 6 and the output voltage is taken from pin 1. The input frequency is differentiated by using the resistor R7 and capacitor C3 and then the resultant pulse train goes to pin 6.
The timer circuit gets triggered by the built-in comparator circuit in the IC when the negative edge of the pulse train appears at pin 6. The current flowing out of pin 6 is proportional to the values of capacitor C1 and resistor R1 which are also known as the timing components and the input frequency.
Therefore we get the output voltage across the resistor R4 which is proportional to the frequency of the input. The value of the resistor R3 is dependent upon the supply voltage.
These converters are used in wide range of applications such as communication, power control, measurement and instrumentation systems etc. A digital tachometer is an electronic device which measures the rate of rotation of a wheel. They display the rate of rotation in the form of voltage which is why a frequency to voltage converter is required in them.
The diagram below shows a digital tachometer. The rate of occurrence of some events can be measured by a rate meter. It counts the events for a certain time period and then divides the number of events by the total time and hence we get a rate. This is the theory of operation of a simple tachometer. We are using an IC LM for this tachometer circuit. The capacitors C1 and C2 and the resistor R1 have specific values according to the circuit requirements.
These values can be studied from the data sheet of LM The input signal is given at pin 1 and at pin 11 we apply a reference voltage.
0コメント