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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments ADS1112IDGSRG4

Name: ADS1112IDGSRG4
Brand: Texas Instruments
SKU: ADS1112IDGSRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADS1112IDGSRG4

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: ADS1112IDGSRG4.pdf

Description:: IC ADC 16BIT SIGMA-DELTA 10VSSOP

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Product details

Overview

ADS1112IDGSRG4 from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter with integrated PGA, 2.048V reference, I²C interface, and MSOP-10 package. It supports two differential or three single-ended input channels, programmable data rates from 15SPS to 240SPS, and operates from 2.7V to 5.5V. It delivers ±0.01% FSR INL and continuous self-calibration for high-accuracy sensor signal acquisition in space-constrained industrial sensing nodes.

For engineers reviewing the ADS1112IDGSRG4 datasheet, ADS1112IDGSRG4 pinout, ADS1112IDGSRG4 application, or ADS1112IDGSRG4 equivalent, key selection considerations include its onboard 2.048V ±0.05% reference drift (5ppm/°C), I²C address select via A0/A1 pins (8 options), 240µA active current, 12–16-bit resolution scaling with data rate, and differential input impedance of 2.8MΩ/PGA.

Technical Context

The ADS1112IDGSRG4 implements a delta-sigma modulator core with digital filtering, an internal 2.048V reference (not externally accessible), and a fixed-frequency oscillator driving conversion timing. Its multiplexer selects between two differential (AIN0–AIN1, AIN2–AIN3) or three single-ended (AIN0, AIN1, AIN2 referenced to AIN3) input configurations under software control via the configuration register.

It uses binary two's complement output coding, right-justified and sign-extended, with resolution varying per data rate: 12 bits at 240SPS, 14 at 60SPS, 15 at 30SPS, and full 16 bits at 15SPS. The onboard PGA provides gains of 1, 2, 4, or 8 - directly affecting input impedance (2.8MΩ/PGA) and offset error (0.4–1.2mV).

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	16 bits at 15SPS; scales down to 12 bits at 240SPS - enables trade-off between speed and precision without external decimation.
Data Rate	15/30/60/240 SPS - selectable via DR[1:0] bits; determines conversion time, noise floor, and effective resolution.
Input Range	±2.048V differential (PGA = 1); full-scale range = 4.096V/PGA - sets measurable voltage span before clipping.
INL	±0.01% of FSR max - ensures monotonicity and linearity critical for calibration-sensitive measurements like RTD or strain gauge readouts.
Reference Accuracy	2.048V ±0.05% (±1.024mV), 5ppm/°C drift - defines absolute accuracy baseline; not user-replaceable or externally monitored.
Supply Current	240µA active, 0.05–2µA power-down - supports battery-powered operation with rapid wake-on-conversion in single-cycle mode.
PGA Gains	1, 2, 4, 8 - adjusts input sensitivity and effective LSB size (e.g., 62.5µV/LSB at PGA=8, 15SPS), while scaling input impedance inversely.

Pinout & Package

ADS1112IDGSRG4 is packaged in MSOP-10 (DGS), a 3mm × 3mm, 0.5mm pitch surface-mount package rated for −40°C to +85°C operation. Pin functions are validated per TI SBAS282D datasheet.

Pin/Terminal	Circuit Role	Design Meaning
AIN0	Differential Channel 1 positive / Single-ended Channel 1 input	Primary analog input; must remain within GND−0.2V to VDD+0.2V; high-impedance node sensitive to source impedance.
AIN1	Differential Channel 1 negative / Single-ended Channel 2 input	Complements AIN0 in differential mode; serves as second single-ended channel; shares same voltage limits and impedance constraints.
GND	Analog and digital ground reference	Single-point return path for all analog and digital currents; requires low-inductance connection to system ground plane.
AIN2	Differential Channel 2 positive / Single-ended Channel 3 input	Enables second differential pair or third single-ended channel; referenced to AIN3 in single-ended mode.
AIN3	Differential Channel 2 negative / Single-ended common input	Shared reference for single-ended inputs; must be tied to system ground or stable bias point; not internally connected to GND.
VDD	Power supply input	Accepts 2.7V–5.5V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin to suppress switching current spikes.
SDA	I²C bidirectional serial data line	Open-drain interface; requires external pull-up resistor; supports Standard/Fast/High-Speed I²C modes up to 3.4MHz.
SCL	I²C serial clock input	Input-only clock line; driven by master; no clock stretching supported - simplifies bus arbitration in multi-device systems.
A0	I²C slave address select (LSB)	Configures one of eight possible 7-bit addresses (1001000–1001111); sampled at power-up or after General Call Reset.
A1	I²C slave address select (MSB)	Works with A0 to set unique I²C address; floating state is valid and defined in Table 4 of datasheet; no external pull required.

Key Features

Feature	Design Value
Onboard 2.048V reference	Integrated, non-accessible reference with ±0.05% initial accuracy and 5ppm/°C drift - eliminates need for external precision reference and associated layout complexity.
Continuous self-calibration	Automatic offset and gain correction during operation - removes requirement for manual calibration routines or factory trim steps in end equipment.
Programmable gain amplifier (PGA)	Gains of 1/2/4/8 with matched channel gain error ≤0.01% - enables direct measurement of mV-level sensor outputs (e.g., thermocouples, bridge sensors) without external amplification.
Single-cycle conversion mode	Auto-power-down after conversion completes - reduces average current to sub-µA levels in intermittent sampling applications such as wireless sensor nodes.
I²C address select via A0/A1	Eight unique slave addresses using only two pins - supports up to eight ADS1112IDGSRG4 devices on one I²C bus without address conflict or additional logic.

Applications

Temperature Monitoring System	Industrial Pressure Transmitter
Use Scenario: Measuring RTD or thermistor voltage in handheld or panel-mounted temperature loggers with battery backup. IC Role / Device Role / Timing Role: Primary ADC acquiring bipolar differential sensor signals at 15–60SPS with 16-bit resolution and onboard reference stability. Use Value: Eliminates external reference and PGA, reducing BOM count and PCB area while maintaining ±0.1°C accuracy over −40°C to +85°C.	Use Scenario: Digitizing millivolt-level bridge output from pressure sensors in 4–20mA loop-powered transmitters. IC Role / Device Role / Timing Role: High-precision front-end ADC with programmable gain (up to 8×) and low 240µA supply current compatible with loop power budget. Use Value: Enables direct ratiometric measurement against onboard 2.048V reference, improving long-term stability and reducing calibration drift vs. discrete reference solutions.
Smart Home Environmental Sensor	Portable Multifunction Data Logger
Use Scenario: Simultaneous acquisition of humidity, ambient temperature, and CO₂ sensor analog outputs in compact IoT edge nodes. IC Role / Device Role / Timing Role: Multi-channel ADC supporting three single-ended inputs (AIN0/AIN1/AIN2 referenced to AIN3) with shared I²C interface. Use Value: Reduces component count versus dual-channel alternatives; A0/A1 address select allows co-location of multiple sensors on same bus without address collision.	Use Scenario: Field-deployable instrument capturing analog waveforms from vibration, acoustic, or current-sense shunts at variable sample rates. IC Role / Device Role / Timing Role: Configurable-resolution ADC with selectable data rates (15–240SPS) and automatic self-calibration for maintenance-free operation. Use Value: Delivers no-missing-codes performance and ±0.01% INL across full temperature range - enabling post-processing algorithms like FFT without amplitude distortion artifacts.

Temperature Monitoring System

Industrial Pressure Transmitter

Use Scenario: Measuring RTD or thermistor voltage in handheld or panel-mounted temperature loggers with battery backup.

IC Role / Device Role / Timing Role: Primary ADC acquiring bipolar differential sensor signals at 15–60SPS with 16-bit resolution and onboard reference stability.

Use Value: Eliminates external reference and PGA, reducing BOM count and PCB area while maintaining ±0.1°C accuracy over −40°C to +85°C.

Use Scenario: Digitizing millivolt-level bridge output from pressure sensors in 4–20mA loop-powered transmitters.

IC Role / Device Role / Timing Role: High-precision front-end ADC with programmable gain (up to 8×) and low 240µA supply current compatible with loop power budget.

Use Value: Enables direct ratiometric measurement against onboard 2.048V reference, improving long-term stability and reducing calibration drift vs. discrete reference solutions.

Smart Home Environmental Sensor

Portable Multifunction Data Logger

Use Scenario: Simultaneous acquisition of humidity, ambient temperature, and CO₂ sensor analog outputs in compact IoT edge nodes.

IC Role / Device Role / Timing Role: Multi-channel ADC supporting three single-ended inputs (AIN0/AIN1/AIN2 referenced to AIN3) with shared I²C interface.

Use Value: Reduces component count versus dual-channel alternatives; A0/A1 address select allows co-location of multiple sensors on same bus without address collision.

Use Scenario: Field-deployable instrument capturing analog waveforms from vibration, acoustic, or current-sense shunts at variable sample rates.

IC Role / Device Role / Timing Role: Configurable-resolution ADC with selectable data rates (15–240SPS) and automatic self-calibration for maintenance-free operation.

Use Value: Delivers no-missing-codes performance and ±0.01% INL across full temperature range - enabling post-processing algorithms like FFT without amplitude distortion artifacts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS1115IDGSR	4-channel, 16-bit, I²C, same MSOP-10 package; adds ALERT pin and wider PGA range (1–16×); higher 3mA supply current.	Supports four single-ended or two differential channels; includes programmable comparator and alert output - better suited for alarm-triggered logging.	Select ADS1115IDGSR when needing >3 analog inputs or hardware interrupt capability; ADS1112IDGSRG4 remains optimal for minimal footprint and lowest power in 2-/3-channel designs.
MCP3424-E/ST	4-channel, 18-bit ΔΣ ADC, I²C, TSSOP-14; external reference support; 15SPS–3.75kSPS; 250µA typical current.	Higher resolution (18-bit) and faster max rate; requires external reference and separate PGA configuration - increases design complexity and board area.	Choose MCP3424-E/ST for applications demanding <10ppm linearity or multi-voltage reference flexibility; ADS1112IDGSRG4 offers superior integration and lower system-level cost where 16-bit suffices.

Compared with ADS1115IDGSR and MCP3424-E/ST, ADS1112IDGSRG4 provides the smallest footprint (MSOP-10), lowest active current (240µA), and highest level of integration (reference + oscillator + PGA + ADC in one die), making it ideal for ultra-compact, low-power sensor nodes where channel count and resolution requirements align precisely with its specification envelope.

Availability

ADS1112IDGSRG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-lifecycle availability, and guaranteed traceability.

Supply support for ADS1112IDGSRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The ADS1112IDGSRG4 belongs to TI's precision delta-sigma ADC product line, engineered specifically for low-power, space-constrained sensor signal conditioning in industrial, medical, and portable measurement systems.

FAQ

What is the operating temperature range for ADS1112IDGSRG4?

The ADS1112IDGSRG4 is specified for operation from −40°C to +85°C. This range is validated per the Absolute Maximum Ratings and Electrical Characteristics tables in the official SBAS282D datasheet. All performance parameters-including INL, offset error, and reference drift-are guaranteed across this full industrial temperature span, making ADS1112IDGSRG4 suitable for deployment in harsh environments such as factory floors or outdoor sensor enclosures.

Does ADS1112IDGSRG4 support external reference voltage?

No, ADS1112IDGSRG4 does not support external reference voltage. It contains an internal 2.048V reference that is permanently connected to the ADC core and cannot be disabled, bypassed, or replaced. The reference is not accessible at any pin and is not intended for use by external circuitry. All gain and offset specifications for ADS1112IDGSRG4 include the contribution of this onboard reference, and its 5ppm/°C drift is part of the total system error budget.

How many I²C addresses can be configured on ADS1112IDGSRG4?

ADS1112IDGSRG4 supports eight unique I²C slave addresses via the A0 and A1 pins. Each pin can be tied LOW, HIGH, or left floating (unconnected), yielding eight valid combinations as defined in Table 4 of the SBAS282D datasheet. The address is latched at power-up or after an I²C General Call Reset command (06h), and remains fixed until the next reset event. This enables up to eight ADS1112IDGSRG4 devices to share a single I²C bus without address conflict.

What is the maximum achievable data rate and corresponding resolution for ADS1112IDGSRG4?

The maximum data rate for ADS1112IDGSRG4 is 240 samples per second (SPS), achieved when DR[1:0] = 00 in the configuration register. At this rate, the device delivers 12-bit resolution with no missing codes. Resolution scales with data rate: 14 bits at 60SPS, 15 bits at 30SPS, and full 16-bit resolution at the minimum 15SPS setting. This trade-off is inherent to the delta-sigma architecture and is documented in Table 1 and the "Data Rate" section of the SBAS282D datasheet.

Can ADS1112IDGSRG4 measure true bipolar differential signals?

Yes, ADS1112IDGSRG4 can measure true bipolar differential signals - for example, ±2.048V across AIN0–AIN1 - but neither input may go below GND−0.2V or above VDD+0.2V. The device does not support negative supply rails; both inputs must remain within the specified absolute voltage limits relative to GND. In practice, this means differential inputs must be centered within the supply range (e.g., using a mid-supply bias) to avoid clipping when measuring bipolar waveforms.

ADS1112IDGSRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Number of Bits:: 16

Sampling Rate (Per Second):: 240

Number of Inputs:: 2, 3

Input Type:: Differential, Single Ended

Data Interface:: I2C

Configuration:: MUX-PGA-ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: Internal

Voltage - Supply, Analog:: 2.7V ~ 5.5V

Voltage - Supply, Digital:: 2.7V ~ 5.5V

Features:: PGA, Selectable Address

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 10-VSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

ADS1112IDGSRG4 FAQ

1.How can I place an order for ADS1112IDGSRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADS1112IDGSRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADS1112IDGSRG4 reliable?

The price and inventory of ADS1112IDGSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1112IDGSRG4 is usually 5 days.

3.What payment methods are accepted for ADS1112IDGSRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1112IDGSRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADS1112IDGSRG4?

ADS1112IDGSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADS1112IDGSRG4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADS1112IDGSRG4?

For technical support, including ADS1112IDGSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1112IDGSRG4 requirements.

6.How does Aetrix verify that ADS1112IDGSRG4 is sourced from the original manufacturer or authorized distributors?

All ADS1112IDGSRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS1112IDGSRG4 meets industry standards.

7.What is the process for return or replacement of ADS1112IDGSRG4?

All ADS1112IDGSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1112IDGSRG4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADS1112IDGSRG4 part is unused and in its original packaging.

Return procedure for ADS1112IDGSRG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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