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Datasheet Linear Technology LT2940IDD#PBF

Производитель	Linear Technology
Серия	LT2940
Модель	LT2940IDD#PBF

Power and Current Monitor

Datasheets

Скачать » Datasheet, PDF, 350 Кб, Файл закачен 31-07-2016
LT2940 - Power and Current Monitor
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LT2940
Power and Current Monitor
FEATURES n DESCRIPTION Four-Quadrant Power Measurement
В±5% Power Measurement Accuracy
4V to 80V High Side Sense, 100V Max
Current Mode Power and Current Outputs
Output Bandwidth Exceeds 500kHz
В±3% Current Measurement Accuracy
6V to 80V Supply Range, 100V Max
Inverting and Noninverting Open-Collector
Comparator Outputs
Available in 12-Pin DFN (3mm Г— 3mm) and 12-Lead
MSOP Packages The LTВ®2940 measures a high side current and a differential voltage, multiplies them and outputs a current
proportional to instantaneous power. Bidirectional high
side currents and bipolar voltage differences are correctly
handled by the four-quadrant multiplier and push-pull
output stage, which allows the LT2940 to indicate forward
and reverse power п¬‚ow.
An integrated comparator with inverting and noninverting open-collector outputs makes the LT2940 a complete
power level monitor. In addition, an output current proportional to the sensed high side current allows current
monitoring. The current mode outputs make scaling,
п¬Ѓltering and time integration as simple as selecting external resistors and/or capacitors. APPLICATIONS Board Level Power and Current Monitoring
Line Card and Server Power Monitoring ...

Цены

LT2940IDD#PBF на РадиоЛоцман.Цены

DFN

Поставщик	Производитель	Наименование	Цена
Элитан	Linear Technology	LT2940IDD	280 руб.
Кремний	Linear Technology	LT2940IDD PBF	по запросу
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Цены » Профессиональная электроника и электротехника

Корпус / Упаковка / Маркировка

Корпус	3x3 DFN-12
Код корпуса	DD
Индекс корпуса	05-08-1725

Параметры

Demo Boards	DC1495A
Design Tools	LTspice Model
Экспортный контроль	нет
Основные особенности	Voltage Monitor, Current Monitor, Power Monitor
I/O	Complementary Open Collector Comparator
Isupply	3.5 мА
Number of Supplies	1
Рабочий диапазон температур	от -40 до 85 °C
Vin Range	4V to 80V

Экологический статус

RoHS	Совместим

Статьи

Скачать » Статьи - LT Journal, PDF, 1.3 Мб, 30-06-2010
Unique Analog Multiplier Continuously Monitors Instantaneous Power and Simplifies Design of Power Control Loops
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Unique Analog Multiplier Continuously Monitors
Instantaneous Power and Simplifies Design of
Power Control Loops
Mitchell Lee and Thomas DiGiacomo As energy consumption in electronics is increasingly scrutinized, the ability to accurately
monitor and control power becomes an important part of any system design. To measure
instantaneous power, one must simultaneously measure current and voltage and multiply
the results. While traditional analog multiplier ICs can perform continuous multiplication,
they typically lack the operating range and input sensitivity required for power monitoring
and control. The high price of the multiplier itself and the necessary additional signal
conditioning circuits make such a solution costly both in dollars and in board area.
Digital solutions, on the other hand,
can provide sensitivity and dynamic
range, but lack the ability to continuously monitor power. For instance, the
LTC4151 combines a 7V to 80V operating
voltage range, a current sense amplifier,
a MUX, and an I2C interface with a 12-bit
ADC to measure current and voltage.
Multiplication is performed in a host
processor. This makes for an accurate
power monitoring solution, but the 7.5Hz
conversion rate of the ADC limits its utility in closed loop applications, where it
is unable to respond to rapid changes.
The LT2940 power monitor solves the ...