Texas Instruments ADS1100A3IDBVTG4

Overview

ADS1100A3IDBVTG4 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 a SOT23-6 package. It operates ratiometrically using the supply voltage as reference and draws only 90 µA in active mode. It is used in portable instrumentation for high-resolution, low-power sensor signal digitization.

For engineers reviewing the ADS1100A3IDBVTG4 datasheet, ADS1100A3IDBVTG4 pinout, ADS1100A3IDBVTG4 application, or ADS1100A3IDBVTG4 equivalent, key selection criteria include its 16-bit no-missing-codes performance, continuous self-calibration, differential input architecture, I²C address 1001011 (AD3), and suitability for space-constrained, battery-powered measurement systems.

Technical Context

The ADS1100A3IDBVTG4 implements a fully differential delta-sigma modulator with integrated digital filter and internal system clock (~275 kHz nominal). Its ratiometric conversion uses VDD as reference, eliminating external reference components. The onboard PGA supports gains of 1, 2, 4, or 8 to optimize dynamic range for low-level signals like thermistor or bridge outputs.

It operates exclusively as an I²C slave device with fixed 7-bit address 1001011 (0x4B), supporting Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes. Conversion modes are software-selectable via configuration register: single-shot (auto power-down) or continuous, with ST/BSY bit indicating busy status.

Key Specifications

Pinout & Package

SOT23-6 package (DBV), 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, JEDEC MO-178AC compliant. Pin 1 marked by dot or beveled edge.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1100A3IDBVTG4, ADS1115IDGSR offers channel multiplexing but increases board area and power, while MCP3421A0T-E/CH delivers higher resolution at lower speed and demands external calibration effort-making ADS1100A3IDBVTG4 optimal for compact, self-contained, maintenance-free 16-bit sensing.

Availability

ADS1100A3IDBVTG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for ADS1100A3IDBVTG4 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 ADS1100 product line was designed for ultra-compact, low-power, high-accuracy sensor signal acquisition in space- and energy-constrained systems-emphasizing integration, self-calibration, and ease of use without external references or trimming.

FAQ

What is the I²C address of the ADS1100A3IDBVTG4?

The ADS1100A3IDBVTG4 has a fixed 7-bit I²C slave address of 1001011 (0x4B), corresponding to the AD3 variant per TI's ordering table. This address is factory-programmed and cannot be changed. It enables up to eight ADS1100 devices (A0–A7) on the same I²C bus without address conflict, provided their markings (AD0–AD7) differ. The ADS1100A3IDBVTG4 responds only to this address during read/write operations.

Does the ADS1100A3IDBVTG4 require an external voltage reference?

No, the ADS1100A3IDBVTG4 does not require an external voltage reference. It operates ratiometrically using the VDD supply voltage as its reference, meaning the full-scale range is ±VDD/PGA. This eliminates the need for precision external references, reduces BOM cost and PCB area, and simplifies design-especially in battery-powered or space-constrained applications where the ADS1100A3IDBVTG4 is commonly deployed.

How does the self-calibration function work in the ADS1100A3IDBVTG4?

The ADS1100A3IDBVTG4 performs continuous, automatic self-calibration of both offset and gain errors without user intervention or external commands. The calibration circuitry runs in the background during normal operation and cannot be disabled. All published specifications-including INL (±0.0125% FSR) and offset error (±2.5 mV/PGA)-already reflect the calibrated performance. No system-level calibration routine is needed, making ADS1100A3IDBVTG4 ideal for maintenance-free, long-life sensor modules.

What are the power consumption characteristics of the ADS1100A3IDBVTG4?

The ADS1100A3IDBVTG4 draws 90 µA typical in active conversion mode and as low as 0.05–2 µA in power-down mode. In single-conversion mode, it automatically powers down after each conversion, minimizing average current in intermittent-read applications. Supply voltage range is 2.7–5.5 V; power dissipation is 210 µW at 3.0 V and 450 µW at 5.0 V. These values make ADS1100A3IDBVTG4 suitable for coin-cell–powered portable instruments and energy-harvesting nodes.

Can the ADS1100A3IDBVTG4 interface with a 3.3 V microcontroller I²C bus?

Yes, the ADS1100A3IDBVTG4 is fully compatible with 3.3 V I²C buses. Its SDA and SCL inputs accept VIH ≥ 0.7 × VDD (so ≥ 2.31 V at VDD = 3.3 V) and VIL ≤ 0.3 × VDD (≤ 0.99 V), and its outputs drive to near-VDD levels. With appropriate pull-up resistors (e.g., 2.2 kΩ to 3.3 V), it interoperates reliably with standard-mode (100 kHz) and fast-mode (400 kHz) I²C masters. The ADS1100A3IDBVTG4 itself can operate from 2.7–5.5 V, so 3.3 V supply is within spec.