Texas Instruments ADS1013IRUGT

Overview

ADS1013IRUGT from Texas Instruments is a 12-bit, delta-sigma analog-to-digital converter (ADC) with integrated voltage reference and oscillator, supporting single-ended or differential input configurations. It operates from 2.0V to 5.5V, consumes 150μA in continuous-conversion mode, delivers up to 3.3kSPS, and targets space-constrained sensor measurement systems such as battery monitoring and portable instrumentation.

For engineers reviewing the ADS1013IRUGT datasheet, ADS1013IRUGT pinout, ADS1013IRUGT application, or ADS1013IRUGT equivalent, key selection criteria include its fixed ±2.048V full-scale range, absence of PGA/comparator, ultra-small X2QFN-10 (1.5mm × 2mm) package, I²C interface with four selectable addresses, and operation across –40°C to +125°C.

Technical Context

The ADS1013IRUGT implements a delta-sigma ADC core with internal 1MHz oscillator (divided to 250kHz modulator clock), fixed-gain signal path, and no programmable gain amplifier or digital comparator. Its analog front-end uses switched-capacitor sampling with typical common-mode input impedance of 6MΩ and differential input impedance of 4.9MΩ at ±2.048V FSR.

It supports two conversion modes - single-shot (auto-power-down after conversion) and continuous-conversion - with data rates selectable from 128SPS to 3300SPS. Conversion settles in one cycle, so conversion time equals 1/selected data rate (e.g., 303μs at 3.3kSPS).

Key Specifications

Pinout & Package

RUG package is a 10-pin, 1.5mm × 2mm × 0.4mm X2QFN with wettable flanks, designed for high-density PCB layouts and automated optical inspection (AOI). Thermal resistance R_θJA = 245.2°C/W enables operation at full speed without forced airflow in compact enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit I²C ADC applications.

Compared with ADS1014IRUGT, ADS1013IRUGT trades PGA/comparator capability for lower cost and simpler configuration; versus MCP3221A0T-E/OT, it provides greater integration (reference + oscillator) at the expense of maximum sample rate and architectural flexibility.

Availability

ADS1013IRUGT is available at Aetrix Electronics and suitable for battery voltage monitoring, portable instrumentation, and temperature measurement systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ADS1013IRUGT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The ADS101x product line was designed specifically for low-power, space-constrained sensor signal conditioning - integrating reference, oscillator, and I²C interface to minimize external components in battery-operated and high-density systems.

FAQ

Does ADS1013IRUGT support programmable gain?

No, ADS1013IRUGT does not include a programmable gain amplifier (PGA). Its full-scale range is fixed at ±2.048V, unlike ADS1014IRUGT and ADS1015IRUGT which offer selectable gains from ±0.256V to ±6.144V. This simplifies configuration and reduces cost where input signal range is known and stable - for example, in dedicated battery monitor circuits using fixed-ratio resistor dividers. The ADS1013IRUGT retains all other core features including internal reference, oscillator, and I²C interface.

What is the function of the ALERT/RDY pin on ADS1013IRUGT?

The ALERT/RDY pin on ADS1013IRUGT is not functional - it remains in a high-impedance state and serves no purpose in this variant. Unlike ADS1014IRUGT and ADS1015IRUGT, the ADS1013IRUGT lacks both the digital comparator and conversion-ready logic. Therefore, no external pullup is required on this pin, and it may be left unconnected or tied to GND without affecting operation. This reflects the device's simplified feature set targeting cost-sensitive, single-function sensor interfaces.

Can ADS1013IRUGT operate from a 1.8V supply?

No, ADS1013IRUGT cannot operate from a 1.8V supply. Its absolute minimum recommended supply voltage is 2.0V, and the absolute maximum rating is 7V. Operation below 2.0V may result in undefined behavior, including failure to start the internal oscillator or incorrect ADC conversions. For 1.8V systems, consider TI's ADS1113IRUGT (16-bit, 2.0V–5.5V) or evaluate level-shifting the supply rail - but note that the ADS1013IRUGT itself is not rated for 1.8V operation per its datasheet specifications.

Is ADS1013IRUGT pin-compatible with ADS1015IRUGT?

Yes, ADS1013IRUGT is pin-compatible with ADS1015IRUGT in the RUG (X2QFN-10) package - both share identical pin assignments and mechanical dimensions. However, functional differences exist: ADS1015IRUGT includes a 4-input multiplexer, PGA, and comparator, while ADS1013IRUGT supports only one differential or single-ended input with no PGA or comparator. Swapping them requires firmware updates to disable unused features and reconfigure register settings, but no PCB redesign is necessary.

What is the typical input impedance of ADS1013IRUGT at ±2.048V full-scale range?

At ±2.048V full-scale range, the ADS1013IRUGT exhibits a typical differential input impedance of 4.9MΩ and a common-mode input impedance of 6MΩ. These values derive from its switched-capacitor delta-sigma architecture and internal 250kHz modulator clock. High-impedance sensor sources (e.g., pH electrodes or thermistors without buffering) may load the input and cause gain error; for accuracy better than 0.1%, source impedance should remain below 1kΩ, or an op-amp buffer should be used before the ADS1013IRUGT inputs.