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LM2907/LM2917 Frequency to Voltage Converter
Bu sitede kullanılan tüm ürün adları, ticari markalar, markalar ve logolar ilgili sahiplerinin mülkiyetindedir. Bu adları, ticari markaları, markaları ve logoları içeren ürünlerin tasviri, açıklaması veya satışı yalnızca tanımlama amaçlıdır ve herhangi bir hak sahibi ile herhangi bir ilişkiyi veya yetkiyi göstermeyi amaçlamaz.
General Description
The LM2907,LM2917 series are monolithic frequency to voltage converters with a high gain op amp/comparator designed to operate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate. The tachometer uses a charge pump technique and offers frequency doubling for low ripple, full input protection in two versions (LM2907-8, LM2917-8) and its output swings to ground for a zero frequency input.
The op amp/comparator is fully compatible with the tachometer and has a floating transistor as its output. This feature allows either a ground or supply referred load of up to 50 mA The collector may be taken above VCC up to a maximum VCE of 28V.
The two basic configurations offered include an 8-pin device with a ground referenced tachometer input and an internal connection between the tachometer output and the op amp non-inverting input. This version is well suited for single speed or frequency switching or fully buffered frequency to voltage conversion applications.
The more versatile configurations provide differential tachometer input and uncommitted op amp inputs. With this version the tachometer input may be floated and the op amp becomes suitable for active filter conditioning of the tachometer output.
Both of these configurations are available with an active shunt regulator connected across the power leads. The regulator clamps the supply such that stable frequency to voltage and frequency to current operations are possible with any supply voltage and a suitable resistor.
Features
● Ground referenced tachometer input interfaces directly with variable reluctance magnetic pickups
● Op amp/comparator has floating transistor output
● 50 mA sink or source to operate relays, solenoids, meters, or LEDs
● Frequency doubling for low ripple
● Tachometer has built-in hysteresis with either differential input or ground referenced input
● Built-in zener on LM2917
● ±0.3% linearity typical
● Ground referenced tachometer is fully protected from damage due to swings above VCC and below ground
Applications
● Over/under speed sensing
● Frequency to voltage conversion (tachometer
● Speedometers
● Breaker point dwell meters
● Hand-held tachometer
● Speed governors
● Cruise control
● Automotive door lock control
● Clutch control
● Horn control
● Touch or sound switches
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Yedek Ürün
Substitute Product | Description |
---|---|
NE567 | A general-purpose tone and frequency decoder IC that is often used as a replacement in frequency-related applications. |
LM2917N-8 | An alternative with similar functionality, but with an internal 8V Zener regulator for improved performance in fluctuating conditions. |
TC9402 | A versatile frequency-to-voltage and voltage-to-frequency converter IC, suitable for various signal processing tasks. |
MC33039 | A precision frequency-to-voltage converter specifically designed for automotive and industrial applications. |
LM2907M-8 | Similar to LM2907N-8 but available in a different package (SOIC-8) for surface mount applications. |
Ürün Kullanımı
The LM2907N-8 is a frequency-to-voltage converter IC that is commonly used in applications where it is necessary to convert a frequency signal into a corresponding analog voltage signal. This type of IC is used in various circuits and applications. Here are some typical uses:
Typical Circuit Diagram:
In a basic application, the LM2907N-8 would be implemented as follows:
Example Schematic:
Calculation of Output Voltage:
The relationship between the input frequency (f) and the output voltage (Vout) is given by the internal design and external components. Using appropriate resistors and capacitors, you can scale the output voltage to match the input frequency range.
For detailed design, you would refer to the datasheet of the LM2907N-8, which provides formulas and design guidelines for selecting the external components appropriately.
Datasheet Reference:
If you are designing a circuit with the LM2907N-8, it is highly recommended to refer to its datasheet. The datasheet contains electrical characteristics, typical application circuits, and guidelines for selecting external components to achieve the desired performance.
Keep in mind that the actual implementation may vary depending on the specific requirements of your application, and might include additional elements for filtering, stabilization, or interfacing with other parts of your system.
Küresel Lojistik Ülke Listesi
Bayrak | Ülke | Tahmini Teslimat Süresi | Minimum İlk Ağırlık Maliyeti | ||
---|---|---|---|---|---|
Ekspres | Standart Kargo | Ekspres (0.5kg) | Standart Kargo (0.05kg) |
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İade
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LM2907N-8
LM2907N-8 dünya çapında bölgesel farklılıklar veya satın alma nedeniyle LM2907N-8 için alternatif adlara sahip olabilecek çeşitli markalara sahiptir. LM2907N-8 aşağıdaki isimlerle de biliniyor olabilir
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