Texas Instruments ADS1113IDGSR

Overview

ADS1113IDGSR from Texas Instruments is a 16-bit, delta-sigma analog-to-digital converter with single differential or single-ended input, internal voltage reference and oscillator, I²C interface, 860 SPS max data rate, and 150 µA operating current - used for precision battery monitoring and portable sensor interfaces.

For engineers reviewing the ADS1113IDGSR datasheet, ADS1113IDGSR pinout, ADS1113IDGSR application, or ADS1113IDGSR equivalent, key selection criteria include its ultra-small X2QFN-10 package (2.0 mm × 1.5 mm), ±0.256 V to ±6.144 V programmable full-scale range, single-cycle settling, and operation across –40°C to +125°C.

Technical Context

The ADS1113IDGSR implements a delta-sigma ADC core with integrated 1 MHz oscillator divided to 250 kHz modulator frequency, internal low-drift voltage reference, and I²C-compatible serial interface supporting four pin-selectable addresses. It operates in single-shot or continuous-conversion mode with no external clock required.

Unlike ADS1114/ADS1115, it lacks a programmable gain amplifier (PGA) and digital comparator; its analog input stage uses switched-capacitor sampling with Z_CM ≈ 6 MΩ and Z_DIFF ≈ 4.9 MΩ at ±2.048 V FSR, requiring low-impedance signal sources or external buffering for high-accuracy measurements.

Key Specifications

Pinout & Package

ADS1113IDGSR is packaged in a 10-pin X2QFN (RUG) package measuring 2.0 mm × 1.5 mm × 0.4 mm, with wettable flanks and exposed thermal pad for enhanced thermal performance in space-constrained layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit I²C ADC applications.

Compared with ADS1114IDGSR, ADS1113IDGSR trades PGA/comparator functionality for lower cost and reduced firmware overhead; compared with MCP3421A0T-E/CH, it delivers 57× higher maximum sample rate and superior noise performance at 860 SPS while maintaining identical 10-pin X2QFN footprint.

Availability

ADS1113IDGSR is available at Aetrix Electronics and suitable for battery voltage monitoring, portable temperature sensing, and industrial current sensing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS1113IDGSR 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 low-power signal chain solutions.

The ADS111x product line was designed for space- and power-constrained sensor measurement applications - delivering integrated reference, oscillator, and I²C interface in ultra-small packages without sacrificing 16-bit accuracy.

FAQ

What is the maximum sample rate supported by the ADS1113IDGSR?

The ADS1113IDGSR supports a maximum sample rate of 860 samples per second (SPS) in continuous-conversion mode. This rate is programmable across eight discrete values (8, 16, 32, 64, 128, 250, 475, and 860 SPS), with each setting optimized for specific noise-performance trade-offs. At 860 SPS, the device achieves 16-bit effective resolution with 187.5 µV_RMS input-referred noise at ±6.144 V full-scale range, making it suitable for high-speed sensor monitoring without external oversampling.

Does the ADS1113IDGSR include a programmable gain amplifier (PGA)?

No, the ADS1113IDGSR does not include a programmable gain amplifier. Unlike the ADS1114IDGSR and ADS1115IDGSR, which integrate a PGA supporting gains from 1× to 16× (±0.256 V to ±6.144 V FSR), the ADS1113IDGSR provides fixed-gain conversion only. Its input stage accepts differential or single-ended signals directly within the full-scale range set by the selected reference - requiring external amplification for sub-millivolt signals. This simplifies design for applications with well-conditioned inputs like battery taps or ratiometric sensors.

What package type is used for the ADS1113IDGSR, and what are its dimensions?

The ADS1113IDGSR uses the RUG package - a 10-pin X2QFN variant measuring 2.0 mm × 1.5 mm × 0.4 mm with an exposed thermal pad. This ultra-small leadless package features wettable flanks for reliable automated optical inspection (AOI) and offers 245.2°C/W junction-to-ambient thermal resistance. Its compact size reduces PCB area by more than 60% versus the VSSOP-10 alternative, making it ideal for wearable electronics, medical patches, and dense sensor modules where space is constrained.

Can the ADS1113IDGSR operate from a 2.0 V supply?

Yes, the ADS1113IDGSR is fully specified to operate from a minimum supply voltage of 2.0 V up to 5.5 V. At 2.0 V, it maintains 150 µA typical operating current and retains full 16-bit performance across its –40°C to +125°C temperature range. The internal voltage reference remains stable, and I²C timing complies with Fast Mode specifications down to 2.0 V. This wide supply range allows direct integration with single-cell Li-ion (2.7–4.2 V), coin-cell (3 V), and legacy 5 V systems without regulators or level shifters.

Is the ALERT/RDY pin functional on the ADS1113IDGSR?

Yes, the ALERT/RDY pin on the ADS1113IDGSR functions exclusively as a conversion-ready (RDY) indicator in open-drain configuration. It asserts low when a conversion completes and the result is ready in the conversion register. Unlike ADS1114IDGSR and ADS1115IDGSR, it does not support comparator mode because the ADS1113IDGSR lacks an integrated digital comparator. A pull-up resistor to VDD is required, and the pin can be polled or used with MCU interrupt capability to eliminate periodic I²C reads.