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Datasheet Linear Technology LTC2990

Quad I2C Voltage, Current and Temperature Monitor

Datasheets

• Download » Datasheet, PDF, 304 Kb, Revision: E, File uploaded 09-25-2017
  LTC2990 - Quad I2C Voltage, Current and Temperature Monitor
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  LTC2990
  Quad I2C Voltage, Current
  and Temperature Monitor
  Features Description Measures Voltage, Current and Temperature
  nn Measures Two Remote Diode Temperatures
  nn ±0.5°C Accuracy, 0.06°C Resolution (Typ)
  nn ±1°C Internal Temperature Sensor (Typ)
  nn 14-Bit ADC Measures Voltage/Current
  nn 3V to 5.5V Supply Operating Voltage
  nn Four Selectable Addresses
  nn Internal 10ppm/°C Voltage Reference
  nn 10-Lead MSOP Package The LTC®2990 is used to monitor system temperatures,
  voltages and currents. Through the I2C serial interface,
  the device can be configured to measure many combinations of internal temperature, remote temperature,
  remote voltage, remote current and internal VCC. The
  internal 10ppm/°C reference minimizes the number of
  supporting components and area required. Selectable
  address and configurable functionality give the LTC2990
  flexibility to be incorporated in various systems needing
  temperature, voltage or current data. The LTC2990 fits
  well in systems needing sub-millivolt voltage resolution,
  1% current measurement and 1°C temperature accuracy
  or any combination of the three. nn Applications ...

Prices

Packaging

Parametrics

	LTC2990CMS#PBF	LTC2990CMS#TRPBF	LTC2990IMS#PBF	LTC2990IMS#TRPBF
ADC	14-Bit	14-Bit	14-Bit	14-Bit
Number of Channels	2	2	2	2
Demo Boards	DC1338B	DC1338B	DC1338B	DC1338B
Design Tools	Linduino File	Linduino File	Linduino File	Linduino File
Export Control	no	no	no	no
External Temp Sense Accuracy, °C	1.5	1.5	1.5	1.5
I/O	Serial I2C	Serial I2C	Serial I2C	Serial I2C
Internal Temp Sense Accuracy, °C	3	3	3	3
Isupply, mA	1.1	1.1	1.1	1.1
Monitors	External V, External I, External Temperature, Internal Vs, Internal Temperature	External V, External I, External Temperature, Internal Vs, Internal Temperature	External V, External I, External Temperature, Internal Vs, Internal Temperature	External V, External I, External Temperature, Internal Vs, Internal Temperature
Operating Temperature Range, °C	0 to 70	0 to 70	-40 to 85	-40 to 85
Output	Digital	Digital	Digital	Digital
Sensor Type	Diode, Internal	Diode, Internal	Diode, Internal	Diode, Internal
Supply Voltage Range	2.9V to 5.5V	2.9V to 5.5V	2.9V to 5.5V	2.9V to 5.5V

Eco Plan

Articles

• Download » Articles - LT Journal, PDF, 1.1 Mb, 01-18-2011
  I2C System Monitor Combines Temperature, Voltage and Current Measurements for Single-IC System Monitoring
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  I2C System Monitor Combines Temperature, Voltage and
  Current Measurements for Single-IC System Monitoring
  David Schneider LTC2990 Features Measures Voltage, Current and Temperature Measures Two Remote Diode Temperatures ±1ºC Accuracy, 0.06ºC Resolution ±2ºC Internal Temperature 15-Bit ADC Measures Voltage and Current 3V to 5.5V Supply Operating Voltage I2C Serial Interface with Four
  Selectable Addresses Internal 10ppm Voltage Reference 10-Lead MSOP Package 22 | January 2011 : LT Journal of Analog Innovation 1.0 380
  100µA
  10µA 0.8 ∆VD
  0.6 0.4
  100 200 300 RSERIES = 0Ω
  RSERIES = 30Ω 360
  DIODE TEMPERATURE (K) DIODE VOLTAGE (V) The limit on the complexity
  of large integrated circuits
  is dominated by how much
  power they can dissipate.
  The trend in µprocessors
  and FPGAs is toward
  packing more features into
  smaller ICs, run at ever-lower
  voltages. The resulting rise
  in power dissipation makes
  it increasingly difficult to
  monitor and control sources
  of heat. Where it was once
  suitable to have a single ...
• Download » Articles - LT Journal, PDF, 261 Kb, 04-19-2017
  Making Accurate Temperature Measurements with Devices with Different Ideality Factors
  Docket ↓
  Making Accurate Temperature Measurements with Devices
  with Different Ideality Factors
  Hamza Salman Afzal and Shuilin Tian The ability to accurately measure temperature is critical
  to the reliable operation of power systems. Accurate
  temperature data can reveal the instantaneous health of a
  system, and enable real-time protection functions such as
  thermal shutdown. For instance, significant rates of change
  in temperature can indicate increased power consumption.
  If a proper temperature feedback loop is implemented, this
  information can be used to reduce power consumption
  before temperatures escalate to dangerous levels.
  Perhaps the least expensive and most
  ubiquitous temperature sensor is a diode.
  A silicon p-n junction has a forward
  drop of approximately 700mV and a
  temperature coefficient of -2.2mV/C
  at room temperature. This sensitivity
  to temperature is exploited in many
  systems as a means of measuring
  temperature by simply biasing the diode
  with a constant current and measuring
  the resulting voltage (see Figure 1)
  This method has achieved wide acceptance ...

Moldel Line

• LTC2990CMS#PBF LTC2990CMS#TRPBF LTC2990IMS#PBF LTC2990IMS#TRPBF

Manufacturer's Classification

• Signal Conditioning > Amplifiers > Current Sense Amplifiers
• Monitor, Control and Protection > Power Monitors
• Monitor, Control and Protection > Temperature Monitors > Digital Temperature Measurement Systems