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ADS1120-Q1

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Automotive 16-bit 2-kSPS 4-ch low-power delta-sigma ADC with PGA and VREF for small signal sensors

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Data sheet

ADS1120-Q1

ACTIVE
Data sheet Order now

Product details

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 Automotive TI functional safety category Functional Safety-Capable 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 Automotive TI functional safety category Functional Safety-Capable 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 mm × 6.4 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Wide supply range: 2.3 V to 5.5 V
  • Programmable gain: 1 V/V to 128 V/V
  • Programmable data rates: 5 SPS 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)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Wide supply range: 2.3 V to 5.5 V
  • Programmable gain: 1 V/V to 128 V/V
  • Programmable data rates: 5 SPS 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)

The ADS1120-Q1 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-Q1 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. Communication to the device is established through a mode 1 SPI-compatible interface. The ADS1120-Q1 is offered in a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.

The ADS1120-Q1 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-Q1 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. Communication to the device is established through a mode 1 SPI-compatible interface. The ADS1120-Q1 is offered in a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.
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* Data sheet ADS1120-Q1 Automotive, 4-Channel, 2-kSPS, Low-Power, 16-Bit ADC With Integrated PGA and Reference datasheet (Rev. B) PDF | HTML May 15, 2020
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML Mar 18, 2024
Application note A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML Mar 13, 2024
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML Mar 29, 2023
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 (Rev. A) PDF | HTML Mar 27, 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) Jun 19, 2020
Functional safety information ADS1120-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML Apr 24, 2020
Analog design Journal How delta-sigma ADCs work, Part 1 (Rev. A) Sep 19, 2016
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar 19, 2015
Analog design Journal How delta-sigma ADCs work, Part 2 Nov 9, 2011

Design & development

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Evaluation board

ADS1120EVM — ADS1120 Evaluation Module

The ADS1120 evaluation module (EVM) is an evaluation system for the ADS1120, a 16-bit, multichannel, delta-sigma analog-to-digital converter (ADC). The EVM uses the ADS1120 along with minimal circuitry to demonstrate functionality for prototyping and part evaluation. The pins of the ADS1120 (...)

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ADS1220-C-EXAMPLE-CODE — ADS1220 Example Code

Expedite your embedded design using this example C code for the ADS1220 product family
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Simulation model

ADS1220 IBIS Model (Rev. A)

SBAM171A.ZIP (82 KB) - IBIS model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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TSSOP (PW) 16 Ultra Librarian
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