Texas Instruments ADS1100A0IDBVR

Overview

ADS1100A0IDBVR from Texas Instruments is a self-calibrating, 16-bit delta-sigma analog-to-digital converter with differential inputs, I²C interface, and programmable gain amplifier (PGA = 1/2/4/8) in SOT23-6 package. It operates from 2.7V to 5.5V, achieves ≤0.0125% FSR INL, 4µV_P-P noise, and supports data rates of 8–128 SPS. It is used in portable instrumentation for high-resolution, low-power sensor signal digitization.

For engineers reviewing the ADS1100A0IDBVR datasheet, ADS1100A0IDBVR pinout, ADS1100A0IDBVR application, or ADS1100A0IDBVR equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-ready availability details - all grounded in TI's SBAS239B datasheet.

Technical Context

The ADS1100A0IDBVR implements a fully differential delta-sigma modulator with integrated digital filter and internal system clock (nominal 275 kHz), eliminating need for external timing components. Its ratiometric conversion uses VDD as reference, and continuous self-calibration compensates for offset and gain drift without user intervention.

Input impedance is PGA-dependent (2.4 MΩ/PGA differential, 8 MΩ common-mode), requiring low-impedance sources or buffering for accuracy. The device supports only slave-mode I²C communication (7-bit address 1001000), with full compatibility across Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) bus modes.

Key Specifications

Pinout & Package

SOT23-6 package (DBV), 1.6 mm × 2.9 mm × 1.15 mm body, lead pitch 0.95 mm, moisture sensitivity level 1. Pin 1 marked by dot or beveled edge; marking "AD0" confirms A0 I²C address.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1115IRUGR and MCP3421A0T-E/CH, the ADS1100A0IDBVR uniquely combines self-calibration, PGA, and sub-100 µA active current in SOT23-6 - making it optimal for space-constrained, maintenance-free, single-sensor measurement nodes.

Availability

ADS1100A0IDBVR is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply with guaranteed long-term sourcing and full traceability.

Supply support for ADS1100A0IDBVR 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 focused on analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The ADS1100 product line was designed specifically for ultra-compact, low-power, high-accuracy sensor signal acquisition in space- and energy-constrained applications - emphasizing self-calibration, I²C simplicity, and robustness across industrial temperature ranges.

FAQ

What is the I²C address of the ADS1100A0IDBVR?

The ADS1100A0IDBVR has a fixed 7-bit I²C slave address of 1001000 (0x48), corresponding to the "A0" variant in the ADS1100 family. This address is factory-programmed and cannot be changed. The AD0 pin (Pin 1) is an internal marker, not a user-configurable address line - confirming identity as the A0 version. All communication with ADS1100A0IDBVR must target 0x48.

Does the ADS1100A0IDBVR require an external reference voltage?

No, the ADS1100A0IDBVR uses its VDD supply as the ratiometric reference - eliminating need for external precision references. Its output code is proportional to (VIN+ − VIN–)/VDD, so measurement accuracy tracks supply variations. This simplifies design in battery-powered systems where VDD may drift, as long as the sensor output scales similarly - a key advantage over reference-dependent ADCs like MCP3421A0T-E/CH.

How does the PGA affect full-scale input range in the ADS1100A0IDBVR?

In the ADS1100A0IDBVR, full-scale differential input range equals ±VDD/PGA. At VDD = 5.0 V and PGA = 8, the usable range is ±625 mV; at PGA = 1, it is ±5.0 V. This scaling allows direct digitization of low-level sensor outputs (e.g., 10 mV bridge signals) without external amplification - preserving SNR while avoiding clipping. The PGA setting is configured via bits PGA1:PGA0 in the configuration register.

Can the ADS1100A0IDBVR operate from a 3.3 V supply?

Yes, the ADS1100A0IDBVR is fully specified for 2.7 V to 5.5 V operation, including 3.3 V. At 3.3 V, its typical supply current remains 90 µA, and full-scale differential input range adjusts ratiometrically (e.g., ±412.5 mV at PGA = 8). Electrical characteristics such as INL (±0.0125% FSR) and noise (4 µV_P-P) are maintained across the entire voltage range per TI SBAS239B.

Is the ADS1100A0IDBVR pin-compatible with other ADS1100 variants like ADS1100A1IDBVR?

Yes - all ADS1100 variants (A0 through A7) share identical SOT23-6 (DBV) packaging, pinout, electrical behavior, and register map. The only difference is factory-programmed I²C address (e.g., ADS1100A0IDBVR = 0x48, ADS1100A1IDBVR = 0x49). This allows drop-in replacement in designs where bus addressing is managed in firmware, enabling flexible multi-node configurations without PCB changes.