Texas Instruments ADS1100A6IDBVT

Overview

ADS1100A6IDBVT from Texas Instruments is a self-calibrating, 16-bit delta-sigma analog-to-digital converter with differential inputs, I²C interface, programmable gain amplifier (gain = 1/2/4/8), and 8–128 SPS data rate in SOT23-6 package. It operates ratiometrically using the supply voltage as reference and achieves ±0.0125% FSR INL and 4 µV_P-P noise for high-accuracy sensor signal digitization in space-constrained industrial sensing nodes.

For engineers reviewing the ADS1100A6IDBVT datasheet, ADS1100A6IDBVT pinout, ADS1100A6IDBVT application, or ADS1100A6IDBVT equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in smart transmitters and portable instrumentation, and validated alternative options - all grounded in TI's SBAS239B datasheet and official ordering information.

Technical Context

The ADS1100A6IDBVT 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 architecture ties full-scale range directly to VDD/PGA, enabling stable measurements under supply variation.

It supports two operating modes - continuous conversion (ST/BSY always reads 1) and single-shot (auto power-down post-conversion, reducing active current to 90 µA). The I²C slave interface accepts Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes, with address 1001110 (A6 variant) fixed at factory.

Key Specifications

Pinout & Package

SOT23-6 package (DBV), 1.6 mm × 2.9 mm × 1.1 mm body, gull-wing leads, thermal pad not present. Pin 1 marked by dot or beveled edge; marking "AD6" indicates I²C address 1001110.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1115IRUGT and MCP3424-E/SL, the ADS1100A6IDBVT offers the smallest footprint (SOT23-6), lowest quiescent current (90 µA), and guaranteed continuous self-calibration - making it optimal for single-channel, space- and power-constrained industrial sensing where long-term zero-drift performance is non-negotiable.

Availability

ADS1100A6IDBVT is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.

Supply support for ADS1100A6IDBVT 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 personal electronics markets since 1930.

The ADS1100 product line was designed specifically for ultra-compact, low-power, high-accuracy sensor signal acquisition in battery-operated and space-constrained industrial systems - prioritizing self-calibration, ratiometric simplicity, and minimal external component count.

FAQ

What is the I²C address of the ADS1100A6IDBVT?

The ADS1100A6IDBVT has a fixed 7-bit I²C slave address of 1001110 (0x4E in hexadecimal), corresponding to the "A6" variant per TI's ordering table. This address is factory-programmed and cannot be changed. When communicating, the full address byte sent by the master is 1001110R/W, where R/W is the read/write bit. The device acknowledges only this specific address and responds to General Call Reset (00H + 06H).

Does the ADS1100A6IDBVT require an external reference voltage?

No, the ADS1100A6IDBVT does not require an external reference voltage. It operates ratiometrically using its VDD supply as the reference; full-scale input range equals ±VDD/PGA. This eliminates the need for precision voltage references and reduces BOM cost and board area. The internal reference is inherently tied to VDD, so any supply variation directly scales the measurement - a feature beneficial in battery-powered systems where absolute accuracy is secondary to relative stability.

How does the programmable gain amplifier (PGA) affect the input voltage range of the ADS1100A6IDBVT?

The PGA in the ADS1100A6IDBVT scales the differential input voltage before digitization. With gains of 1, 2, 4, or 8, the full-scale input range becomes ±VDD/PGA. For example, at VDD = 5.0 V and PGA = 8, the usable input span is ±0.625 V - enabling high-resolution digitization of small signals like thermistor or bridge outputs without external amplification. Input voltage limits remain GND – 0.2 V to VDD + 0.2 V on both VIN+ and VIN− regardless of PGA setting.

Can the ADS1100A6IDBVT operate from a 3.3 V supply?

Yes, the ADS1100A6IDBVT is fully specified to operate from 2.7 V to 5.5 V, including standard 3.3 V rails. At 3.3 V, its active supply current is typically 90 µA, power dissipation drops to ~210 µW, and full-scale range at PGA = 1 becomes ±3.3 V. All electrical characteristics - including INL (±0.0125% FSR), noise (4 µV_P-P), and common-mode rejection (>94 dB at PGA = 8) - are guaranteed across this range per the SBAS239B datasheet.

What is the purpose of continuous self-calibration in the ADS1100A6IDBVT?

Continuous self-calibration in the ADS1100A6IDBVT automatically corrects for offset and gain drift caused by temperature changes and long-term aging - without interrupting conversions or requiring host intervention. The calibration circuitry runs transparently in the background, and all published specifications (e.g., ±0.0125% FSR INL, ±2.5 mV offset error) include its effect. This ensures consistent accuracy over –40°C to +85°C and throughout product lifetime, eliminating manual recalibration routines in field-deployed equipment.