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ADS112U04

ACTIVE

16-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & UART interface

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Data sheet

ADS112U04

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 16 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type UART Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal 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), GPIO, Oscillator, PGA, Small Size, 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 UART Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal 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), GPIO, Oscillator, PGA, Small Size, 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) WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • 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
  • 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:
    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
  • Three General-Purpose Inputs/Outputs
  • 2-Wire UART Compatible Interface (8-N-1 Format) With Baud Rates up to 120 kBaud and
    Auto-Baud-Rate Detection
  • 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
  • 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:
    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
  • Three General-Purpose Inputs/Outputs
  • 2-Wire UART Compatible Interface (8-N-1 Format) With Baud Rates up to 120 kBaud and
    Auto-Baud-Rate Detection
  • Package: 3.0-mm × 3.0-mm × 0.75-mm WQFN

The ADS112U04 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, 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 ADS112U04 ideally suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors.

The ADS112U04 features a 2-wire, UART-compatible interface. In applications that require galvanic isolation this universal asynchronous receiver/transmitter (UART) interface minimizes the number of digital isolation channels, thus saving cost, board space, and power.

The ADS112U04 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 ADS112U04 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, 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 ADS112U04 ideally suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors.

The ADS112U04 features a 2-wire, UART-compatible interface. In applications that require galvanic isolation this universal asynchronous receiver/transmitter (UART) interface minimizes the number of digital isolation channels, thus saving cost, board space, and power.

The ADS112U04 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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ADS112C04 ACTIVE 16-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC with PGA, VREF, 2x IDACs & I2C interface Has I2C interface

Technical documentation

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Top documentation Type Title Format options Date
* Data sheet ADS112U04 16-Bit, 4-Channel, 2-kSPS, Delta-Sigma ADC With UART Interface datasheet (Rev. A) PDF | HTML Oct 25, 2018
Application note A Simple, Java-Based CRC Calculator PDF | HTML Mar 4, 2026
Application note K-type thermocouple measurement circuit with precision ADC (Rev. A) PDF | HTML Sep 20, 2024
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 A Basic Guide to RTD Measurements (Rev. A) PDF | HTML Mar 29, 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML Mar 29, 2023
Application note A Basic Guide to Thermocouple Measurements (Rev. A) PDF | HTML Mar 29, 2023
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) Sep 9, 2021
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML Aug 23, 2021
Application note RTD Wire-Break Detection Using Precision Delta-Sigma ADCs PDF | HTML Feb 18, 2021
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) Jun 19, 2020
Application brief Low-Cost, Single-Chip, Diff Temp Measurement Solution Using Delta-Sigma ADCs (Rev. A) May 4, 2018
Application brief Reducing System Cost, Size and Power in Isolated DAQ Systems Using ADS122U04 (Rev. A) Jun 15, 2017
Analog design Journal How delta-sigma ADCs work, Part 1 (Rev. A) Sep 19, 2016
Analog design Journal How delta-sigma ADCs work, Part 2 Nov 9, 2011

Design & development

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

Evaluation board

ADS112U04EVM — ADS112U04 evaluation module

The ADS112U04 evaluation module (EVM) is a platform for evaluation of the ADS112U04 analog-to-digital converter (ADC). The ADS112U04 is a 16-bit, 2-kSPS, 4-channel, low-power Delta-Sigma ADC with a UART interface for sensor measurement and process control applications. The ADS112U04 also includes (...)

User guide: PDF
Supported products & hardware
Application software & framework

ADC-TEMP-SENSOR-FW — Temperature-sensor firmware source files

This temperature-sensor linearization firmware provides a software routine for measuring and linearizing most common temperature sensors, including resistance temperature detectors (RTDs), thermocouples, thermistors (NTC, PTC, etc.) and analog temperature sensors.

This software includes an (...)

Supported products & hardware
Support software

ADS122U04-C-EXAMPLE-CODE — ADS122U04 example C code

Expedite your embedded design using this example C code for the ADS122U04 product family
Supported products & hardware
Simulation model

ADS112U04 IBIS Model

SBAM348.ZIP (92 KB) - IBIS model
Supported products & hardware
Calculation tool

ADC-RTD-CONFIG-CALC — RTD Configuration Calculator for Precision ADCs

This resistance temperature detector (RTD) configuration calculator is a Microsoft® Excel-based tool that helps the user identify a system solution for an RTD application. Two-, three- and four-wire RTD configurations are shown by default, with options for a high-side or low-side reference (...)

Supported products & hardware
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 (...)

Supported products & hardware
Design tool

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.
Supported products & hardware
Reference design

TIDA-010019 — RTD replacement for cold junction compensation reference design in a temperature sensor

Temperature-sensing applications that use a thermocouple (TC) require an accurate local temperature sensor to achieve high accuracy. Solutions for design challenges such as cold-junction compensation (CJC) or including an ultra-low power TC analog front-end are highlighted and addressed in this (...)
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 16 Ultra Librarian
WQFN (RTE) 16 Ultra Librarian
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