Texas Instruments ADS1110A1IDBVR

Overview

ADS1110A1IDBVR from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter with integrated 2.048V reference, programmable gain amplifier (PGA), and I²C interface in SOT23-6 package. It delivers ±0.01% FSR INL, 15–240 SPS data rate, and 240 µA active current for precision low-power sensing in space-constrained systems.

For engineers reviewing the ADS1110A1IDBVR datasheet, ADS1110A1IDBVR pinout, ADS1110A1IDBVR application, or ADS1110A1IDBVR equivalent, key selection criteria include its differential input range (±2.048V/PGA), self-calibrating architecture, I²C address 1001001, −40°C to +85°C operating range, and single-supply 2.7V–5.5V operation.

Technical Context

The ADS1110A1IDBVR implements a fully differential delta-sigma modulator with on-chip digital filtering and continuous self-calibration-no external calibration required. Its fixed 2.048V reference is internal-only and inseparable from the conversion chain, contributing directly to gain error (0.05–0.40%) and drift (5 ppm/°C) specs.

It operates exclusively in I²C slave mode with eight factory-programmed addresses; ADS1110A1IDBVR uses address 1001001 (ED1 marking). Conversion modes are software-selectable: continuous or single-cycle, with automatic power-down after each conversion in single mode to reduce idle current to 0.05 µA.

Key Specifications

Pinout & Package

SOT23-6 package (DBV), 1.6 mm × 2.9 mm × 1.15 mm, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1110A1IDBVR, ADS1113IDBVR trades PGA flexibility for lower cost and simpler biasing, while MCP3421A0T-E/CH offers higher resolution at the expense of speed and firmware portability - neither is pin- or register-compatible.

Availability

ADS1110A1IDBVR is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-term manufacturability, and guaranteed traceability.

Supply support for ADS1110A1IDBVR 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 acquisition and low-power design.

The ADS1110 product line was engineered for space- and power-constrained sensing applications-delivering complete 16-bit ADC functionality in SOT23-6 with no external components required beyond I²C pull-ups.

FAQ

What is the I²C address of the ADS1110A1IDBVR?

The ADS1110A1IDBVR has a fixed 7-bit I²C address of 1001001 (0x49 in hexadecimal), corresponding to the "A1" variant in the ADS1110 family. This address is factory-programmed and cannot be changed. It allows up to eight ADS1110 devices (A0–A7) to share one I²C bus without address conflict, provided each uses a unique variant code. The ADS1110A1IDBVR responds only to this address during read/write operations.

Does the ADS1110A1IDBVR support external reference voltage?

No, the ADS1110A1IDBVR does not support external reference voltage. It integrates a dedicated 2.048V reference with ±0.05% accuracy and 5 ppm/°C drift, which is hardwired to the ADC core and inaccessible to external circuitry. All conversions are referenced to this internal source, and the reference cannot be bypassed, disabled, or replaced. This design ensures consistent performance but precludes ratiometric measurements against system supply rails.

How does the PGA setting affect input range and noise in the ADS1110A1IDBVR?

In the ADS1110A1IDBVR, PGA gain settings (1/2/4/8) scale the full-scale input range inversely: at PGA = 8, the differential input range is ±256 mV; at PGA = 1, it is ±2.048 V. Higher gain increases effective resolution for small signals but reduces headroom. Input-referred noise remains constant (~1.5 µV_RMS), so SNR improves with gain-enabling detection of sub-millivolt changes while maintaining 16-bit integrity at 15 SPS.

Can the ADS1110A1IDBVR operate from a 3.3V supply?

Yes, the ADS1110A1IDBVR operates reliably from 2.7V to 5.5V, including standard 3.3V supplies. At 3.3V, its active supply current is ~240 µA (typical), and power dissipation drops to 0.675 mW. All specifications-including reference accuracy, INL, and I²C timing-are guaranteed across this range. The device maintains full functionality, including self-calibration and I²C communication, with no derating required at 3.3V.

What is the meaning of the "ED1" marking on the ADS1110A1IDBVR package?

The "ED1" laser marking on the ADS1110A1IDBVR indicates its factory-programmed I²C address variant: "ED" denotes the ADS1110 series, and "1" corresponds to binary address 1001001 (0x49). This marking is visible on the top of the SOT23-6 package and matches the "A1" suffix in the part number. It enables rapid visual identification during assembly or failure analysis and confirms compatibility with systems expecting the A1 variant's address configuration.