Texas Instruments ADS1110A2IDBVTG4

Overview

ADS1110A2IDBVTG4 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 ±2.048V differential input range, 15–240 SPS data rate, and continuous self-calibration for precision measurement in space-constrained systems such as portable instrumentation and smart transmitters.

For engineers reviewing the ADS1110A2IDBVTG4 datasheet, ADS1110A2IDBVTG4 pinout, ADS1110A2IDBVTG4 application, or ADS1110A2IDBVTG4 equivalent, key selection considerations include its fixed I²C address (1001010), PGA gain options (1/2/4/8), differential input architecture, onboard oscillator (no external clock support), and guaranteed no-missing-codes performance across all data rates.

Technical Context

The ADS1110A2IDBVTG4 implements a fully differential, switched-capacitor delta-sigma modulator with digital filtering and binary two's complement output coding. Its self-calibrating architecture eliminates manual offset/gain trimming and ensures stable performance over temperature without user intervention.

It operates exclusively in slave mode on the I²C bus with fixed 7-bit address 1001010 (0x4A), supports Standard/Fast/High-Speed I²C modes up to 3.4 MHz, and uses an internal oscillator-no external clock input is accepted. The device features two registers: a 16-bit output register and an 8-bit configuration register controlling data rate, PGA gain, and conversion mode.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1110A2IDBVTG4, ADS1115IRUGR adds channel multiplexing at the cost of higher power and no integrated reference tightness, while MCP3421A0T-E/CH trades speed for resolution and removes I²C address flexibility-both require layout changes due to different pinouts and register maps.

Availability

ADS1110A2IDBVTG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for ADS1110A2IDBVTG4 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, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade signal chains.

The ADS1110 product line was designed specifically for ultra-compact, low-power, high-accuracy measurement in battery-operated and space-constrained systems-emphasizing integration, ease of use, and guaranteed performance without external calibration.

FAQ

What is the I²C address of the ADS1110A2IDBVTG4?

The ADS1110A2IDBVTG4 has a fixed 7-bit I²C address of 1001010 (0x4A), corresponding to the "A2" 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. The ADS1110A2IDBVTG4 responds only to this address during read/write operations.

Does the ADS1110A2IDBVTG4 support external reference voltage?

No, the ADS1110A2IDBVTG4 does not support external reference voltage. It integrates a precision 2.048 V reference with ±0.05% initial accuracy and 5 ppm/°C drift, which is permanently tied to the ADC core. The reference cannot be bypassed, disconnected, or replaced. All gain and linearity specifications-including INL, offset error, and drift-are specified relative to this internal reference, and no external reference pins are provided on the SOT23-6 package.

Can the ADS1110A2IDBVTG4 operate with a 3.3 V supply?

Yes, the ADS1110A2IDBVTG4 operates reliably from 2.7 V to 5.5 V, including standard 3.3 V rails. At 3.3 V, its active supply current remains 240 µA typical, and its input voltage range scales proportionally: full-scale differential input stays at ±2.048 V (independent of VDD), while absolute input limits become GND − 0.2 V to 3.5 V. Logic thresholds adjust automatically (VIH = 0.7 × VDD), ensuring compatibility with 3.3 V microcontrollers without level shifting.

How does the PGA affect input impedance in the ADS1110A2IDBVTG4?

In the ADS1110A2IDBVTG4, differential input impedance is inversely proportional to PGA setting: approximately 2.8 MΩ ÷ PGA (e.g., 2.8 MΩ at PGA = 1, 350 kΩ at PGA = 8). Common-mode impedance also varies with PGA (e.g., 3.5 MΩ at PGA = 1, 0.9 MΩ at PGA = 8). These values derive from the switched-capacitor input stage and onboard oscillator frequency (~275 kHz). High-source-impedance sensors may require buffering to avoid gain error; the datasheet provides exact impedance vs. PGA tables.

Is the ADS1110A2IDBVTG4 pin-compatible with other ADS1110 variants like ADS1110A0IDBVT?

Yes, all ADS1110 variants-including ADS1110A2IDBVTG4, ADS1110A0IDBVT, and ADS1110A7IDBVR-share identical SOT23-6 (DBV) packaging, pinout, electrical behavior, and register map. The only difference is the factory-programmed I²C address (1001000 for A0, 1001010 for A2, etc.). No PCB layout change is needed when substituting between variants; only firmware I²C address initialization must be updated to match the new device's address.