Texas Instruments ADS1110A7IDBVR

Overview

ADS1110A7IDBVR 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 ±0.01% INL, 15–240 SPS data rate, and 240 µA active current for high-resolution sensor digitization in space-constrained systems.

For engineers reviewing the ADS1110A7IDBVR datasheet, ADS1110A7IDBVR pinout, ADS1110A7IDBVR application, or ADS1110A7IDBVR equivalent, key selection factors include its factory-set I²C address (1001111), −40°C to +85°C operating range, differential input architecture, self-calibrating operation, and single-supply 2.7V–5.5V compatibility.

Technical Context

The ADS1110A7IDBVR implements a fully differential, switched-capacitor delta-sigma modulator with digital filtering and continuous on-chip self-calibration-no external calibration required. Its internal 2.048V reference is fixed and non-externalizable, and its oscillator is embedded with no external clock option.

It operates exclusively as an I²C slave device with open-drain SDA/SCL, supports Standard/Fast/High-Speed I²C modes up to 3.4 MHz, and uses binary two's complement output coding with right-justified, sign-extended 12–16 bit results depending on selected data rate.

Key Specifications

Pinout & Package

SOT23-6 package (DBV), 2.9 mm × 1.6 mm × 1.15 mm, surface-mount, moisture-sensitive level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1110A7IDBVR, ADS1115IDGSR adds channel multiplexing at the cost of board area and external reference dependency, while MCP3421A0T-E/CH trades PGA flexibility and lower current for fixed 18-bit resolution-neither offers identical feature parity in size, integration, or power-performance balance.

Availability

ADS1110A7IDBVR is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitter designs requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for ADS1110A7IDBVR 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 and embedded processing technologies, with decades of expertise in precision data acquisition and low-power design.

The ADS1110 product line targets compact, battery-operated measurement systems where integration, size, and self-contained accuracy outweigh multi-channel or ultra-high-speed requirements.

FAQ

What is the I²C address of the ADS1110A7IDBVR?

The ADS1110A7IDBVR has a factory-programmed 7-bit I²C address of 1001111 (0x4F). This is fixed and cannot be changed via hardware pins or software configuration. The address is unique among the eight ADS1110 variants, allowing up to eight devices-including other ADS1110A0–A6 versions-to coexist on the same I²C bus without conflict. ADS1110A7IDBVR uses this address in all communication, including read and write operations to its configuration and output registers.

Does the ADS1110A7IDBVR require an external reference voltage?

No, the ADS1110A7IDBVR does not require or support an external reference voltage. It integrates a precision 2.048V ±0.05% reference with 5 ppm/°C drift, which is permanently tied to the ADC core and cannot be bypassed or replaced. All full-scale ranges (±2.048V/PGA) are derived solely from this internal reference, eliminating external components and associated layout sensitivity. This integration is confirmed in the "Voltage Reference" section of the SBAS276A datasheet and applies specifically to ADS1110A7IDBVR.

How does the PGA setting affect input impedance in the ADS1110A7IDBVR?

In the ADS1110A7IDBVR, differential input impedance scales inversely with PGA gain: it is 2.8 MΩ at PGA=1, 1.4 MΩ at PGA=2, 0.7 MΩ at PGA=4, and 0.35 MΩ at PGA=8. This behavior arises from the switched-capacitor input stage whose effective resistance depends on modulation frequency and capacitor values set by the PGA. At higher gains, lower impedance may load high-output-impedance sources (e.g., thermistors), requiring buffering-details are specified in the Electrical Characteristics table of the SBAS276A datasheet for ADS1110A7IDBVR.

Can the ADS1110A7IDBVR operate from a 3.3V supply?

Yes, the ADS1110A7IDBVR operates reliably from a 3.3V supply, as confirmed by its specified 2.7V–5.5V VDD range. At 3.3V, typical active supply current is 240 µA, power dissipation drops to ~0.675 mW, and logic thresholds (VIH = 0.7×VDD ≈ 2.31V, VIL = 0.3×VDD ≈ 0.99V) remain compatible with standard 3.3V microcontrollers. All performance specifications-including INL, offset error, and reference accuracy-are guaranteed across this full voltage range for ADS1110A7IDBVR.

What is the maximum sampling rate of the ADS1110A7IDBVR?

The maximum sampling rate of the ADS1110A7IDBVR is 240 samples per second (SPS), achieved when the DR[1:0] bits in the configuration register are set to '00'. At this rate, resolution is 12 bits (−2048 to +2047), with no missing codes. Higher data rates reduce effective resolution but improve temporal response-15 SPS yields full 16-bit resolution. This 240 SPS limit is inherent to the delta-sigma modulator's internal clock and filter design and is consistent across all ADS1110 variants, including ADS1110A7IDBVR.