Datasheet Linear Technology LT2940

Manufacturer	Linear Technology
Series	LT2940

Power and Current Monitor

Datasheets

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PDF, 350 Kb, File uploaded: Jul 31, 2016

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Packaging

	LT2940CDD#PBF	LT2940CDD#TRPBF	LT2940CMS#PBF	LT2940CMS#TRPBF	LT2940IDD#PBF	LT2940IDD#TRPBF	LT2940IMS#PBF	LT2940IMS#TRPBF
N	1	2	3	4	5	6	7	8
Package	3x3 DFN-12 Package Outline Drawing	3x3 DFN-12 Package Outline Drawing	MS-12 Package Outline Drawing	MS-12 Package Outline Drawing	3x3 DFN-12 Package Outline Drawing	3x3 DFN-12 Package Outline Drawing	MS-12 Package Outline Drawing	MS-12 Package Outline Drawing
Package Code	DD	DD	MS	MS	DD	DD	MS	MS
Package Index	05-08-1725	05-08-1725	05-08-1668	05-08-1668	05-08-1725	05-08-1725	05-08-1668	05-08-1668
Pin Count	12	12	12	12	12	12	12	12

Parametrics

Parameters / Models	LT2940CDD#PBF	LT2940CDD#TRPBF	LT2940CMS#PBF	LT2940CMS#TRPBF	LT2940IDD#PBF	LT2940IDD#TRPBF	LT2940IMS#PBF	LT2940IMS#TRPBF
Demo Boards	DC1495A	DC1495A	DC1495A	DC1495A	DC1495A	DC1495A	DC1495A	DC1495A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no	no	no	no	no
Features	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor	Voltage Monitor, Current Monitor, Power Monitor
I/O	Complementary Open Collector Comparator	Complementary Open Collector Comparator	Complementary Open Collector Comparator	Complementary Open Collector Comparator	Complementary Open Collector Comparator	Complementary Open Collector Comparator	Complementary Open Collector Comparator	Complementary Open Collector Comparator
Isupply, mA	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Number of Supplies	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Vin Range	4V to 80V	4V to 80V	4V to 80V	4V to 80V	4V to 80V	4V to 80V	4V to 80V	4V to 80V

Eco Plan

	LT2940CDD#PBF	LT2940CDD#TRPBF	LT2940CMS#PBF	LT2940CMS#TRPBF	LT2940IDD#PBF	LT2940IDD#TRPBF	LT2940IMS#PBF	LT2940IMS#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

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Unique Analog Multiplier Continuously Monitors Instantaneous Power and Simplifies Design of Power Control Loops &mdash LT Journal
PDF, 1.3 Mb, File published: Jun 30, 2010
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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 …

Model Line

Series: LT2940 (8)

LT2940CDD#PBF LT2940CDD#TRPBF LT2940CMS#PBF LT2940CMS#TRPBF LT2940IDD#PBF LT2940IDD#TRPBF LT2940IMS#PBF LT2940IMS#TRPBF

Manufacturer's Classification

Monitor, Control and Protection > Power Monitors