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ADS1120

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4-kanaliger, energieeffizienter, kompakter Delta-Sigma-ADC, 16 Bit, 2 kSPS, mit PGA, VREF, 2x IDACs

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ADS1120

AKTIV
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Produktdetails

Resolution (Bits) 16 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal, Supply Input voltage range (max) (V) 2.85, 5.6 Input voltage range (min) (V) -2.85, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 1.4 Analog supply voltage (min) (V) 2.3 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.3 Digital supply (max) (V) 5.5
Resolution (Bits) 16 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal, Supply Input voltage range (max) (V) 2.85, 5.6 Input voltage range (min) (V) -2.85, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 1.4 Analog supply voltage (min) (V) 2.3 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.3 Digital supply (max) (V) 5.5
TSSOP (PW) 16 32 mm² 5 x 6.4 VQFN (RVA) 16 12.25 mm² 3.5 x 3.5
  • Low Current Consumption:
    As Low as 120 µA (typ) in Duty-Cycle Mode
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 V/V to 128 V/V
  • Programmable Data Rates: Up to 2 kSPS
  • 16-Bit Noise-Free Resolution at 20 SPS
  • Simultaneous 50-Hz and 60-Hz Rejection at
    20 SPS with Single-Cycle Settling Digital Filter
  • Two Differential or Four Single-Ended Inputs
  • Dual-Matched Programmable Current Sources:
    50 µA to 1.5 mA
  • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
  • Internal 2% Accurate Oscillator
  • Internal Temperature Sensor:
    0.5°C (typ) Accuracy
  • SPI-Compatible Interface (Mode 1)
  • Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN
  • Low Current Consumption:
    As Low as 120 µA (typ) in Duty-Cycle Mode
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 V/V to 128 V/V
  • Programmable Data Rates: Up to 2 kSPS
  • 16-Bit Noise-Free Resolution at 20 SPS
  • Simultaneous 50-Hz and 60-Hz Rejection at
    20 SPS with Single-Cycle Settling Digital Filter
  • Two Differential or Four Single-Ended Inputs
  • Dual-Matched Programmable Current Sources:
    50 µA to 1.5 mA
  • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
  • Internal 2% Accurate Oscillator
  • Internal Temperature Sensor:
    0.5°C (typ) Accuracy
  • SPI-Compatible Interface (Mode 1)
  • Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN

The ADS1120 is a precision, 16-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.

The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128 V/V. This PGA makes the ADS1120 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements.

Power consumption is as low as 120 µA when operating in duty-cycle mode with the PGA disabled. The ADS1120 is offered in a leadless VQFN-16 or a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.

The ADS1120 is a precision, 16-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.

The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128 V/V. This PGA makes the ADS1120 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements.

Power consumption is as low as 120 µA when operating in duty-cycle mode with the PGA disabled. The ADS1120 is offered in a leadless VQFN-16 or a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet ADS1120 4-Channel, 2-kSPS, Low-Power, 16-Bit ADC with Integrated PGA and Reference datasheet (Rev. C) PDF | HTML 20 Feb 2017
Application note K-type thermocouple measurement circuit with precision ADC (Rev. A) PDF | HTML 20 Sep 2024
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18 Mär 2024
Application note A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 13 Mär 2024
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 Dez 2023
Application note A Basic Guide to RTD Measurements (Rev. A) PDF | HTML 29 Mär 2023
Application note A Basic Guide to Thermocouple Measurements (Rev. A) PDF | HTML 29 Mär 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mär 2023
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 (Rev. A) PDF | HTML 27 Mär 2023
Technical article Designing signal chains for portable diagnostics PDF | HTML 18 Mai 2022
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) 09 Sep 2021
Application note RTD Wire-Break Detection Using Precision Delta-Sigma ADCs PDF | HTML 18 Feb 2021
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 Jun 2020
Application brief Low-Cost, Single-Chip, Diff Temp Measurement Solution Using Delta-Sigma ADCs (Rev. A) 04 Mai 2018
Application brief Reducing System Cost, Size and Power in Isolated DAQ Systems Using ADS122U04 (Rev. A) 15 Jun 2017
Analog Design Journal How delta-sigma ADCs work, Part 1 (Rev. A) 19 Sep 2016
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mär 2015
Analog Design Journal How delta-sigma ADCs work, Part 2 09 Nov 2011

Design und Entwicklung

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Anwendungssoftware und Frameworks

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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
TSSOP (PW) 16 Ultra Librarian
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