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Datasheet Linear Technology LTC2482

ManufacturerLinear Technology
SeriesLTC2482

16-Bit ΔΣ ADC with Easy Drive Input Current Cancellation

Datasheets

  • Download » Datasheet, PDF, 325 Kb, Revision: C, File uploaded 08-21-2017
    LTC2482 - 16-Bit Delta Sigma ADC with Easy Drive Input Current Cancellation
    Docket ↓
    LTC2482
    16-Bit ΔΣ ADC with
    Easy Drive Input Current
    Cancellation
    DESCRIPTION FEATURES Easy Drive™ Technology Enables Rail-to-Rail
    Inputs with Zero Differential Input Current
    Directly Digitizes High Impedance Sensors with
    Full Accuracy
    600nV RMS Noise, Independent of VREF
    Operates with a Reference as Low as 100mV with
    16-Bit Resolution
    GND to VCC Input/Reference Common Mode Range
    Simultaneous 50Hz/60Hz Rejection Mode
    2ppm INL, No Missing Codes
    1ppm Offset and 15ppm Total Unadjusted Error
    No Latency: Digital Filter Settles in a Single Cycle
    Single Supply 2.7V to 5.5V Operation
    Internal Oscillator
    Available in a Tiny (3mm × 3mm) 10-Lead
    DFN Package APPLICATIONS n Direct Sensor Digitizer
    Weight Scales
    Direct Temperature Measurement
    Strain Gauge Transducers ...

Prices

Packaging

Parametrics

LTC2482CDD#PBFLTC2482CDD#TRPBFLTC2482IDD#PBFLTC2482IDD#TRPBF
ADC INL, LSB0.130.130.130.13
ADCs1111
ArchitectureDelta SigmaDelta SigmaDelta SigmaDelta Sigma
Bipolar/Unipolar InputUnipolarUnipolarUnipolarUnipolar
Bits, bits16161616
Number of Channels1111
DNL, LSB1111
Demo BoardsDC941ADC941ADC941ADC941A
Design ToolsLinduino FileLinduino FileLinduino FileLinduino File
Export Controlnononono
FeaturesNo Latency, Easy Drive, 50Hz & 60Hz RejectionNo Latency, Easy Drive, 50Hz & 60Hz RejectionNo Latency, Easy Drive, 50Hz & 60Hz RejectionNo Latency, Easy Drive, 50Hz & 60Hz Rejection
I/OSerial SPISerial SPISerial SPISerial SPI
INL ppm, ppm2222
Input DriveDifferentialDifferentialDifferentialDifferential
Input Span±VREF/2±VREF/2±VREF/2±VREF/2
Internal Referencenononono
Operating Temperature Range, °C0 to 700 to 70-40 to 85-40 to 85
Power, mW0.480.480.480.48
Simultaneousnononono
Speed, ksps0.00680.00680.00680.0068
Supply Voltage Range2.7V to 5.5V2.7V to 5.5V2.7V to 5.5V2.7V to 5.5V

Eco Plan

LTC2482CDD#PBFLTC2482CDD#TRPBFLTC2482IDD#PBFLTC2482IDD#TRPBF
RoHSCompliantCompliantCompliantCompliant

Design Notes

  • Download » Design Notes - DN368, PDF, 75 Kb, 06-02-2005
    “Easy Drive” Delta-Sigma Analog-to-Digital Converters Cancel Input Current Errors
    Docket ↓
    “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 ...
  • Download » Design Notes - DN379, PDF, 146 Kb, 10-26-2005
    Easy Drive ADCs Simplify Measurement of High Impedance Sensors
    Docket ↓
    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 ...

Articles

  • Download » Articles - LT Journal, PDF, 346 Kb, 01-28-2008
    Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort
    Docket ↓
    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 ...
  • Download » Articles - LT Journal, PDF, 123 Kb, 09-01-2005
    Connect High Impedance Sensors Directly to an Easy Drive Delta Sigma ADC
    Docket ↓
    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 ...

Moldel Line

Series: LTC2482 (4)

Manufacturer's Classification

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

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