Product details

Resolution (Bits) 24 Number of input channels 4 Sample rate (Max) (kSPS) 2 Interface type I2C Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int 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, Small Size 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 Digital supply (Min) (V) 2.3 Digital supply (Max) (V) 5.5
Resolution (Bits) 24 Number of input channels 4 Sample rate (Max) (kSPS) 2 Interface type I2C Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int 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, Small Size 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 Digital supply (Min) (V) 2.3 Digital supply (Max) (V) 5.5
TSSOP (PW) 16 22 mm² 5 x 4.4 WQFN (RTE) 16 9 mm² 3 x 3
  • Current Consumption as Low as 315 µA (typ)
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 to 128
  • Programmable Data Rates: Up to 2 kSPS
  • Up to 20 Bits Effective Resolution
  • 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:
    10 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
  • I2C-Compatible Interface
  • Supported I2C Bus Speed Modes:
    Standard-Mode, Fast-Mode, Fast-Mode Plus
  • 16 Pin-Configurable I2C Addresses
  • Package: 3.0-mm × 3.0-mm × 0.75-mm WQFN
  • Current Consumption as Low as 315 µA (typ)
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 to 128
  • Programmable Data Rates: Up to 2 kSPS
  • Up to 20 Bits Effective Resolution
  • 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:
    10 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
  • I2C-Compatible Interface
  • Supported I2C Bus Speed Modes:
    Standard-Mode, Fast-Mode, Fast-Mode Plus
  • 16 Pin-Configurable I2C Addresses
  • Package: 3.0-mm × 3.0-mm × 0.75-mm WQFN

The ADS122C04 is a precision, 24-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, 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. This PGA makes the ADS122C04 ideally suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors.

The ADS122C04 features a 2-wire, I2C-compatible interface that supports I2C bus speeds up to 1 Mbps. Two address pins allow selection of 16 different I2C addresses for the device.

The ADS122C04 is offered in a leadless 16-pin WQFN or a 16-pin TSSOP package and is specified over a temperature range of –40°C to +125°C.

The ADS122C04 is a precision, 24-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, 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. This PGA makes the ADS122C04 ideally suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors.

The ADS122C04 features a 2-wire, I2C-compatible interface that supports I2C bus speeds up to 1 Mbps. Two address pins allow selection of 16 different I2C addresses for the device.

The ADS122C04 is offered in a leadless 16-pin WQFN or a 16-pin TSSOP 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 ADS122C04 24-Bit, 4-Channel, 2-kSPS, Delta-Sigma ADC With I2C Interface datasheet (Rev. B) 19 Oct 2018
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) 09 Sep 2021
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) 23 Aug 2021
Application note RTD Wire-Break Detection Using Precision Delta-Sigma ADCs 18 Feb 2021
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Application note K-type thermocouple measurement circuit with precision ADC 19 Mar 2019
Application note A Basic Guide to Thermocouple Measurements 28 Sep 2018
Application note A Basic Guide to RTD Measurements 19 Jun 2018
Application note Low-Cost, Single-Chip, Diff Temp Measurement Solution Using Delta-Sigma ADCs (Rev. A) 04 May 2018
User guide ADS1x2C04 Evaluation Module User's Guide 12 Oct 2017
Application note Thermocouple Temperature Measurements Using Isolated Amplifiers (Rev. A) 11 Aug 2017
Application note Digital Filter Types in Delta-Sigma ADCs 27 Jun 2017
Application note Reducing System Cost, Size and Power in Isolated DAQ Systems Using ADS122U04 (Rev. A) 15 Jun 2017
White paper Fully integrated signal and power isolation – applications and benefits 10 Feb 2017
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 13 Mar 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ADS122C04EVM — ADS122C04 evaluation module

The ADS122C04 evaluation module (EVM) is a platform for evaluating the ADS122C04 analog-to-digital converter (ADC). The ADS122C04 is a 24-bit, 2-kSPS, 4-channel, low-power delta-sigma ADC with an I2C interface for sensor measurement and process control applications. The ADS122C04 also includes an (...)

Simulation model

ADS122C04 IBIS Model

SBAM329.ZIP (37 KB) - IBIS Model
Simulation tool

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

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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 (...)
Reference designs

TIDA-01526 — High Precision Temperature Measurement for Heat and Cold Meters Reference Design

This reference design implements a high-precision differential temperature measurement (DTM) subsystem using a 24-bit, low-power, delta-sigma ADC. Heat and cold meter DTM subsystems typically use two 2- or 4-wire Resistance Temperature Detectors (RTD) such as PT100, PT500, or PT1000 and can (...)
Package Pins Download
TSSOP (PW) 16 View options
WQFN (RTE) 16 View options

Ordering & quality

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