Product details

Resolution (Bits) 16 Number of input channels 4 Sample rate (Max) (kSPS) 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Automotive TI functional safety category Functional Safety-Capable Reference mode Ext, Int, Supply Input range (Max) (V) 2.85, 5.6 Input 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 voltage AVDD (Min) (V) 2.3 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 1.3 Digital supply (Min) (V) 2.3 Digital supply (Max) (V) 5.5
Resolution (Bits) 16 Number of input channels 4 Sample rate (Max) (kSPS) 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Automotive TI functional safety category Functional Safety-Capable Reference mode Ext, Int, Supply Input range (Max) (V) 2.85, 5.6 Input 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 voltage AVDD (Min) (V) 2.3 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 1.3 Digital supply (Min) (V) 2.3 Digital supply (Max) (V) 5.5
TSSOP (PW) 16 22 mm² 5 x 4.4
  • 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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Technical documentation

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Type Title Date
* Data sheet ADS1120-Q1 Automotive, 4-Channel, 2-kSPS, Low-Power, 16-Bit ADC With Integrated PGA and Reference datasheet (Rev. B) 15 May 2020
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Functional safety information ADS1120-Q1 Functional Safety FIT Rate, FMD and Pin FMA 24 Apr 2020
Application note Digital Filter Types in Delta-Sigma ADCs 27 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 Mar 2015
Technical article My New Year’s Resolution: Benefit from the high resolution delta-sigma ADCs 06 Jan 2015
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 13 Mar 2013
Analog design journal How delta-sigma ADCs work, Part 2 09 Nov 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 (...)

Simulation model

ADS1220 IBIS Model (Rev. A)

SBAM171A.ZIP (82 KB) - IBIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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Simulation tool

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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool

ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
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