Texas Instruments ADS1112IDRCTG4

Overview

ADS1112IDRCTG4 from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter with integrated PGA, 2.048V reference, I²C interface, and dual differential or triple single-ended input channels in a 10-pin SON (DRC) package. It delivers ±2.048V differential full-scale range, 15–240 SPS programmable data rate, and continuous self-calibration for precision sensor measurement in space-constrained industrial and portable systems.

For engineers reviewing the ADS1112IDRCTG4 datasheet, ADS1112IDRCTG4 pinout, ADS1112IDRCTG4 application, or ADS1112IDRCTG4 equivalent, key selection criteria include its onboard 2.048V ±0.05% reference drift (5 ppm/°C), 240 µA active supply current, I²C slave address configurability via A0/A1 pins, and guaranteed no-missing-codes performance across all 12–16-bit resolution modes.

Technical Context

The ADS1112IDRCTG4 implements a switched-capacitor delta-sigma modulator with digital filtering, using an internal 275 kHz oscillator to drive conversion at selectable rates (15/30/60/240 SPS). Its input multiplexer supports two differential pairs (AIN0–AIN1, AIN2–AIN3) or three single-ended channels referenced to AIN3, with configuration controlled via an 8-bit I²C register.

Onboard programmable gain amplifier (PGA) offers gains of 1, 2, 4, or 8-scaling small signals while maintaining 16-bit resolution at lowest data rate. The 2.048V reference is fixed and internal-only; it cannot be bypassed or externally measured, and its accuracy and drift are fully embedded in system-level INL (±0.01% FSR max) and offset error specs (≤1.5 mV at PGA=8).

Key Specifications

Pinout & Package

ADS1112IDRCTG4 uses a 10-pin SON (Small Outline No-Lead) package, 3 mm × 3 mm, wettable flank, RoHS-compliant (package code DRC). Pin 1 marked by top-side dot; thermal pad exposed on underside for enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1112IDRCTG4, ADS1115IDGSR trades integrated reference and lower power for expanded channel count, while MCP3424-E/ST provides higher resolution at same reference/PGA performance but sacrifices speed-making ADS1112IDRCTG4 optimal for balanced 16-bit, low-power, self-contained sensor digitization.

Availability

ADS1112IDRCTG4 is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and smart transmitter designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADS1112IDRCTG4 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 signal chains.

The ADS1112IDRCTG4 belongs to TI's precision delta-sigma ADC product line, designed specifically for space- and power-constrained sensor interfaces in industrial, medical, and portable instrumentation where integration, accuracy, and ease of use are critical.

FAQ

What is the maximum sampling rate of the ADS1112IDRCTG4 and how does it affect resolution?

The ADS1112IDRCTG4 supports four programmable data rates: 15, 30, 60, and 240 samples per second. At 15 SPS, it delivers full 16-bit resolution with no missing codes; resolution decreases to 15 bits at 30 SPS, 14 bits at 60 SPS, and 12 bits at 240 SPS. This trade-off is inherent to its delta-sigma architecture and is configured via DR[1:0] bits in the configuration register. The ADS1112IDRCTG4 maintains guaranteed linearity across all modes.

Does the ADS1112IDRCTG4 require an external reference voltage?

No, the ADS1112IDRCTG4 includes a fully integrated 2.048V reference with ±0.05% initial accuracy and 5 ppm/°C drift. This reference is internal-only and cannot be bypassed, measured, or replaced. All ADC performance specifications-including INL, offset, and gain error-incorporate the onboard reference, eliminating the need for external components and simplifying design validation for the ADS1112IDRCTG4.

How many I²C addresses can be assigned to the ADS1112IDRCTG4?

The ADS1112IDRCTG4 supports eight unique I²C slave addresses through hardware configuration of pins A0 and A1. Each pin can be tied HIGH, LOW, or left floating (NC), yielding eight valid combinations (binary 1001000 to 1001111). The address is latched at power-up or after an I²C General Call Reset, enabling up to eight ADS1112IDRCTG4 devices on a single I²C bus without address conflict or software remapping.

What input configurations does the ADS1112IDRCTG4 support?

The ADS1112IDRCTG4 supports two differential input channels (AIN0–AIN1 and AIN2–AIN3) or three single-ended channels (AIN0, AIN1, AIN2) referenced to AIN3, selected via INP[1:0] bits in the configuration register. It does not support true four-channel single-ended operation. Input voltage range is ±2.048V differential (at PGA=1), scaling inversely with PGA gain-e.g., ±256mV at PGA=8-making the ADS1112IDRCTG4 ideal for low-level sensor interfacing.

Is the ADS1112IDRCTG4 compatible with high-speed I²C mode?

Yes, the ADS1112IDRCTG4 is fully compatible with Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) I²C modes. In High-Speed mode, it responds to the Hs master code (00001xxx) following a START condition and activates internal filters to handle faster transitions. The device automatically exits Hs mode upon STOP condition. No firmware changes are needed-the ADS1112IDRCTG4 handles timing compliance transparently across all supported speeds.