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Datasheet Linear Technology LTC2484IDD#TRPBF

Linear Technology
LTC2484
LTC2484IDD#TRPBF

24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation

Datasheets

  • » Datasheet, PDF, 768 , 31-07-2016
    LTC2484 - 24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation
    LTC2484
    24-Bit ∆Σ ADC with
    Easy Drive Input Current Cancellation
    Features Description Easy Drive Technology Enables Rail-to-Rail Inputs
    with Zero Differential Input Current
    n Directly Digitizes High Impedance Sensors with
    Full Accuracy
    n 600nV
    RMS Noise
    n GND to V
    CC Input/Reference Common Mode Range
    n Programmable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode
    n 2ppm INL, No Missing Codes
    n 1ppm Offset and 15ppm Total Unadjusted Error
    n Selectable 2× Speed Mode (15Hz Using Internal
    Oscillator)
    n No Latency: Digital Filter Settles in a Single Cycle
    n Single Supply 2.7V to 5.5V Operatio Internal Oscillator
    n Available in a Tiny (3mm × 3mm) 10-Lead DFN Package The LTC®2484 combines a 24-bit No Latency ∆Σ™ analogto-digital converter with patented Easy Drive™ technology.
    The patented sampling scheme eliminates dynamic input
    current errors and the shortcomings of on-chip buffering
    through automatic cancellation of differential input current.
    This allows large external source impedances and input ...

/ /

3x3 DFN-10
DD
05-08-1699

ADC INL33.5 LSB
ADCs1
Delta Sigma
Bipolar/Unipolar InputUnipolar
Bits24 bits
1
DNL1 LSB
Demo BoardsDC939A,DC2126A
Design ToolsLinduino File
No Latency, Easy Drive, Temp Sensor, 50Hz & 60Hz Rejection
I/OSerial SPI
INL ppm2 ppm
Input DriveDifferential
Input Span±VREF/2
Internal Reference
-40 85 °C
Power0.48 mW
Simultaneous
Speed0.015 ksps
2.7V to 5.5V

RoHS

Design Notes

  • » Design Notes - DN368, PDF, 75 , 02-06-2005
    “Easy Drive” Delta-Sigma Analog-to-Digital Converters Cancel Input Current Errors
    “Easy Drive” Delta-Sigma Analog-to-Digital Converters
    Cancel Input Current Errors – Design Note 368
    Mike Mayes
    Introduction
    It is now possible to place large RC networks directly in front of high resolution ∆Σ analog-to-digital
    converters without degrading their DC accuracy
    (see Figure 1). The LTC ®248x family of converters
    solves this problem with Easy Drive™ technology,
    a fully passive sampling network that automatically
    cancels the differential input current. Easy Drive
    technology does not use on-chip buffers, which
    compromise performance (see What is Wrong with
    On-Chip Buffers?), but instead uses a new architecture
    that maintains 0.002% full-scale error with input RC
    networks up to 100kΩ and 10μF. This new technology
    offers many advantages over previous generation ∆Σ
    ADCs: Rail-to-rail common mode input range Direct digitization of high impedance sensors Elimination of sampling spikes seen at the ADC input
    pins Simple external lowpass filtering Noise/power reduction Cancellation of external RC settling errors Easy interface to external amplifiers Removal of transmission line effects for remote
    sensors
    RSOURCE
    SENSOR IDIFF = 0
    RSOURCE VIN+
    CEXT Easy Drive ...
  • » Design Notes - DN379, PDF, 146 , 26-10-2005
    Easy Drive ADCs Simplify Measurement of High Impedance Sensors
    advertisement Easy Drive™ ADCs Simplify Measurement of
    High Impedance Sensors – Design Note 379
    Mark Thoren
    Delta-sigma ADCs, with their high accuracy and high noise
    immunity, are ideal for directly measuring many types
    of sensors. Nevertheless, input sampling currents can
    overwhelm high source impedances or low-bandwidth,
    micropower signal conditioning circuits. The LTC®2484
    family of delta sigma converters solves this problem by
    balancing the input currents, thus simplifying or eliminating the need for signal conditioning circuits.
    A common application for a delta-sigma ADC is thermistor
    measurement. Figure 1 shows the LTC2484 connections
    for direct measurement of thermistors up to 100kΩ. Data
    I/O is through a standard SPI interface and the sampling
    current in each input is approximately:
    ⎛ VREF ⎞
    ⎜⎝
    ⎟ – VCM
    V + + VIN–
    2 ⎠
    , where VCM = IN
    1.5MΩ
    2 ...

  • » - LT Journal, PDF, 346 , 28-01-2008
    Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort
    LINEAR TECHNOLOGY MArch 2007 IN THIS ISSUE…
    Cover Article
    Easy Drive Delta-Sigma ADCs Deliver
    Powerful Features and Reduce Design
    Effort.1
    Mark Thoren Linear Technology in the News….2
    Design Features
    Current Mode Flyback DC/DC Controller
    Provides Tremendous Design Flexibility
    .8
    Arthur Kelley Isolated Forward Controllers Offer
    Buck Simplicity and Performance.10
    Charles Hawkes and Arthur Kelley Rugged 3.3V RS485/RS422
    Transceivers with Integrated
    Switchable Termination.14
    Steven Tanghe and Ray Schuler Tiny High Efficiency 2A Buck Regulator
    Directly Accepts Automotive, Industrial
    and Other Wide Ranging Inputs.18
    Kevin Huang 36V Dual 1.4A Monolithic
    Step-Down Converter has Start-Up
    Tracking and Sequencing.21 VOLUME XVII NUMBER 1 Easy Drive Delta-Sigma
    ADCs Deliver Powerful
    Features and Reduce ...
  • » - LT Journal, PDF, 123 , 01-09-2005
    Connect High Impedance Sensors Directly to an Easy Drive Delta Sigma ADC
    DESIGN IDEAS Connect High Impedance Sensors
    Directly to an Easy Drive
    Delta Sigma ADC
    by Mark Thoren
    Delta Sigma ADCs are accurate and
    have high noise immunity, making
    them ideal for directly measuring many
    types of sensors. Nevertheless, input
    sampling currents can overwhelm
    high source impedances or low-bandwidth, micropower signal conditioning
    circuits. The LTC2480 family of Delta
    Sigma converters solves this problem
    by balancing the input currents, thus
    simplifying or eliminating the need for
    signal conditioning circuits.
    A common application for a delta
    sigma ADC is thermistor measurement. Figure 1 shows the LTC2480
    connections for direct measurement of
    thermistors up to 100kΩ. Data I/O is
    through a standard SPI interface, and
    the sampling current in each input is
    approximately 5V
    C8 ...
  • » - LT Journal, PDF, 866 , 01-07-2014
    Wireless Precision Temperature Sensor Powers Itself, Forms Own Network, Enabling Easy Deployment in Industrial Environments
    Wireless Precision Temperature Sensor Powers Itself,
    Forms Own Network, Enabling Easy Deployment
    in Industrial Environments
    Kris Lokere While the Internet connects people via a worldwide computer network, the Internet of
    Things (IoT) refers to a growing trend to create relatively simple devices that interconnect
    and share data independent of computer or human intervention. The IoT has the potential
    to increase efficiency, improve safety and enable entirely new business models in just about
    any facet of life or industry. For example, to reliably and efficiently operate an industrial plant,
    it helps to have as many monitoring (or control) points as possible—more sensors means
    better monitoring. The device-to-device networking of the IoT simplifies distribution and
    networking, making it easy to expand the number and reach of sensors throughout a plant.
    Exponential increases in the number of
    sensors can be achieved by eliminating
    all cabling requirements through the use
    of robust, wireless, micropower sensors
    that run for years on a small battery.
    Better yet, eliminate the need to replace
    or recharge batteries. Instead, sensors
    harvest energy from their immediate
    environment, taking advantage of locally
    available energy sources, such as light,
    vibration or temperature gradients.
    This article shows how to easily build ...

: LTC2484 (8)

  • Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs

:

LTC2484IDDTRPBF, LTC2484IDD TRPBF

: Datasheet Linear Technology LTC2484IDD#TRPBF

     -225
-225
, .
: 1500 .
:
 Rohde Schwarz RTB2002
Rohde&Schwarz RTB2002
: 128 . .
:
 KPA-2106QWF-D
KPA-2106QWF-D
, 350
: 2.25 .
:
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