Texas Instruments ADS1100A3IDBVRG4

Overview

ADS1100A3IDBVRG4 from Texas Instruments is a self-calibrating, 16-bit delta-sigma analog-to-digital converter with differential inputs, I²C interface, programmable gain amplifier (PGA = 1/2/4/8), and 8–128 SPS data rate in SOT23-6 package. It operates ratiometrically using the supply voltage as reference and draws only 90 µA in active mode. It is used in precision low-power sensor measurement circuits such as smart transmitter front-ends.

For engineers reviewing the ADS1100A3IDBVRG4 datasheet, ADS1100A3IDBVRG4 pinout, ADS1100A3IDBVRG4 application, or ADS1100A3IDBVRG4 equivalent, key selection considerations include its fixed I²C address (1001011), 16-bit no-missing-codes performance, ±0.0125% FSR INL, 4 µV_P-P noise, and continuous self-calibration without user intervention.

Technical Context

The ADS1100A3IDBVRG4 implements a fully differential delta-sigma modulator with integrated digital filter and on-chip system clock - no external clock required. Its ratiometric operation ties full-scale range directly to V_DD/PGA, enabling stable measurements across supply variations from 2.7 V to 5.5 V.

It supports two operating modes: continuous conversion (ST/BSY always reads 1) and single-conversion (auto power-down after result). The configuration register controls data rate (8/16/32/128 SPS), PGA gain, and mode - all accessible via standard/fast/high-speed I²C up to 3.4 MHz.

Key Specifications

Pinout & Package

SOT23-6 package (DBV), 1.6 mm × 2.9 mm × 1.15 mm body, gull-wing leads, thermal pad not present. Pin 1 marked by dot or beveled edge; marking "AD3" confirms I²C address 1001011.

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 ADS1100A3IDBVRG4 uniquely combines guaranteed 16-bit no-missing-codes performance, continuous on-chip self-calibration, lowest active current (90 µA), and smallest footprint (SOT23-6), making it optimal for cost-sensitive, space-constrained, single-sensor precision measurement.

Availability

ADS1100A3IDBVRG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitter designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for ADS1100A3IDBVRG4 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 signal chain solutions.

The ADS1100 product line was designed specifically for ultra-compact, low-power, self-contained precision measurement in space- and energy-constrained systems - targeting smart sensors, portable test equipment, and loop-powered transmitters.

FAQ

What is the I²C address of the ADS1100A3IDBVRG4?

The ADS1100A3IDBVRG4 has a factory-programmed 7-bit I²C slave address of 1001011 (0x4B). This address is hardwired and cannot be changed. It is distinct from other ADS1100 variants (e.g., ADS1100A0 = 0x48, ADS1100A1 = 0x49), allowing up to eight devices on the same I²C bus without address conflict. The ADS1100A3IDBVRG4 responds only to this address during read/write operations.

Does the ADS1100A3IDBVRG4 require an external voltage reference?

No, the ADS1100A3IDBVRG4 does not require an external voltage reference. It operates ratiometrically using the V_DD supply voltage as its internal reference. Full-scale input range is ±V_DD/PGA, meaning measurement accuracy tracks supply variations - ideal for systems where a precision reference would add cost and board space. This eliminates the need for external reference ICs or trimming.

How does the self-calibration function in the ADS1100A3IDBVRG4 work?

The ADS1100A3IDBVRG4 performs continuous, automatic self-calibration of offset and gain errors without host intervention or external components. Calibration occurs internally during normal operation and cannot be disabled. All published electrical specifications - including ±0.0125% FSR INL and ±2.5 mV offset error - reflect calibrated performance across –40°C to +85°C. No user-initiated calibration sequence or timing window is required.

What are the power consumption characteristics of the ADS1100A3IDBVRG4 in single-conversion mode?

In single-conversion mode, the ADS1100A3IDBVRG4 draws 90 µA during active conversion and automatically powers down to 0.05–2 µA (typ./max) between conversions. For example, with one 8 SPS conversion per second and 10 ms conversion time, average current drops to ~0.9 µA. This makes the ADS1100A3IDBVRG4 highly suitable for battery-powered sensor nodes where duty cycling is essential for multi-year operation.

Can the ADS1100A3IDBVRG4 measure bipolar input signals?

Yes, the ADS1100A3IDBVRG4 accepts bipolar differential input signals (VIN+ – VIN−), but neither input may go below GND – 0.2 V or above V_DD + 0.2 V. For example, with V_DD = 3.3 V and PGA = 1, valid differential input range is ±3.3 V, but absolute voltages at VIN+ and VIN− must remain within 0 V to 3.5 V. External level-shifting is required for true negative-rail inputs.