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ADS1251U - Texas Instruments

Description: 24-Bit, 20kHz, Low Power Analog-to-Digital Converter

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ADS1251U - Texas Instruments - PCB symbol
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PCB Footprints
ADS1251U - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D
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3D Models
ADS1251U - Texas Instruments - 3D model - Small Outline Packages - D
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ADS1251U Details

  • Manufacturer Part Number:

    ADS1251U

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Package Description:

    SOP-8

  • Pin Count:

    8

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.30

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog Input Voltage-Max:

    5.25 V

  • Analog Input Voltage-Min:

    -4.096 V

  • Conversion Time-Max:

    50 µs

  • Converter Type:

    ADC, DELTA-SIGMA

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e4

  • Length:

    4.9 mm

  • Linearity Error-Max (EL):

    0.0015%

  • Moisture Sensitivity Level:

    2

  • Number of Analog In Channels:

    1

  • Number of Bits:

    24

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Bit Code:

    OFFSET BINARY, 2S COMPLEMENT BINARY

  • Output Format:

    SERIAL

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Sample Rate:

    0.02 MHz

  • Sample and Hold / Track and Hold:

    SAMPLE

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max:

    2 mA

  • Supply Voltage-Min:

    4.75 V

  • Supply Voltage-Nom:

    5 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    3.9 mm

ADS1251U Frequently Asked Questions (FAQs)

  • The ADS1251U requires careful layout and routing to minimize noise and ensure accurate conversions. TI recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital traces separate. Additionally, decoupling capacitors should be placed close to the device.
  • The ADS1251U has a built-in calibration feature that can be used to optimize gain and offset. The device can be calibrated using an external calibration voltage source, and the calibration data can be stored in the device's internal registers. TI provides a calibration guide and software tools to assist with this process.
  • The ADS1251U requires a specific power-up sequence to ensure proper operation. The recommended sequence is to power up the analog supply (AVDD) first, followed by the digital supply (DVDD), and then the clock signal. This sequence helps to prevent latch-up and ensures that the device is properly initialized.
  • The ADS1251U has an internal clock that can be used to synchronize the conversion process. The device can also be synchronized with an external clock signal. TI recommends using a clock signal with a frequency of at least 10 MHz to ensure accurate conversions. Additionally, the device's clock synchronization feature can be used to synchronize multiple devices in a system.
  • The ADS1251U is a high-performance ADC that can generate heat during operation. TI recommends providing adequate thermal dissipation for the device, such as using a heat sink or thermal pad. The device's thermal characteristics are specified in the datasheet, and TI provides thermal modeling tools to help with thermal design.

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ADS1251U Overview

Use the download button to access the ADS1251U schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like ADS12, or try a keyword search, such as Analog to Digital Converters

About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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