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Datasheet Linear Technology LTC2338-18

ManufacturerLinear Technology

18-Bit, 1Msps, 10.24V True Bipolar, Fully Differential Input ADC with 100dB SNR


  • Download » Datasheet, PDF, 1.8 Mb, Revision: A, File uploaded 08-20-2017
    LTC2338-18 - 18-Bit, 1Msps, 10.24V True Bipolar, Fully Differential Input ADC with 100dB SNR
    Docket ↓
    18-Bit, 1Msps, ±10.24V
    True Bipolar, Fully Differential
    Input ADC with 100dB SNR
    1Msps Throughput Rate
    nn ±4LSB INL (Max)
    nn Guaranteed 18-Bit No Missing Codes
    nn Fully Differential Inputs
    nn True Bipolar Input Ranges ±6.25V, ±10.24V, ±12.5V
    nn 100dB SNR (Typ) at f = 2kHz
    nn –115dB THD (Typ) at f = 2kHz
    nn Guaranteed Operation to 125°C
    nn Single 5V Supply
    nn Low Drift (20ppm/°C Max) 2.048V Internal Reference
    nn Onboard Single-Shot Capable Reference Buffer
    nn No Pipeline Delay, No Cycle Latency
    nn 1.8V to 5V I/O Voltages
    nn SPI-Compatible Serial I/O with Daisy-Chain Mode
    nn Internal Conversion Clock
    nn Power Dissipation 50mW (Typ) ...




ADC INL, LSB111111
Bipolar/Unipolar InputTrue BipolarTrue BipolarTrue BipolarTrue BipolarTrue BipolarTrue Bipolar
Bits, bits181818181818
Number of Channels111111
Demo BoardsDC1908A-ADC1908A-ADC1908A-ADC1908A-ADC1908A-ADC1908A-A
Design ToolsLinduino File,LinearLabToolsLinduino File,LinearLabToolsLinduino File,LinearLabToolsLinduino File,LinearLabToolsLinduino File,LinearLabToolsLinduino File,LinearLabTools
Export Controlnononononono
I/OSerial SPISerial SPISerial SPISerial SPISerial SPISerial SPI
Input DriveFully DifferentialFully DifferentialFully DifferentialFully DifferentialFully DifferentialFully Differential
Input Span±6.25V, ±10.24V, ±12.5V±6.25V, ±10.24V, ±12.5V±6.25V, ±10.24V, ±12.5V±6.25V, ±10.24V, ±12.5V±6.25V, ±10.24V, ±12.5V±6.25V, ±10.24V, ±12.5V
Internal Referenceyesyesyesyesyesyes
Operating Temperature Range, °C0 to 700 to 70-40 to 125-40 to 125-40 to 85-40 to 85
Power, mW505050505050
SFDR, dB117117117117117117
SINAD, dB101101101101101101
SNR, dB100100100100100100
Speed, ksps100010001000100010001000
Supply Voltage Range5V5V5V5V5V5V
THD dB, dB-115-115-115-115-115-115

Eco Plan

Design Notes

  • Download » Design Notes - DN522, PDF, 452 Kb, 11-26-2013
    Generating a ±10.24V True Bipolar Input for an 18-Bit, 1Msps SAR ADC
    Docket ↓
    Generating a ±10.24V True Bipolar Input for an 18-Bit, 1Msps
    Design Note 522
    Guy Hoover
    The LTC ®2338 is an 18-bit fully differential SAR ADC
    that is remarkably easy to drive. This 1Msps ADC operates from a single 5V supply and achieves ±4LSB INL
    maximum with –111dB THD and 100dB SNR. Its fully
    differential ±20.48V true bipolar input range minimizes
    the need for range scaling, and its 2kΩ resistive input
    greatly reduces the charge kickback from the internal
    sampling capacitor.
    ADCs claiming similar performance require scaling
    to exceed what is typically a 0V to VREF input range,
    resulting in low impedance inputs or an additional
    buffer stage requirement. To band limit noise and
    minimize disturbances reflected into the buffer from
    sampling transients, other ADCs require filter circuitry
    composed of expensive film or C0G capacitors at the
    driver output. In contrast, the simple driver circuit
    presented here requires only a dual precision op amp
    and two resistors to drive the LTC2338-18. Layout
    strategies for this circuit are also shown. C59 ...

Moldel Line

Series: LTC2338-18 (6)

Manufacturer's Classification

  • Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs
  • Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) ADCs

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