Texas Instruments ADS7047IRUGR

Overview

ADS7047IRUGR from Texas Instruments is a 12-bit, 3-MSPS successive-approximation register (SAR) analog-to-digital converter with fully differential input range of ±AVDD, 1.5 mm × 1.5 mm X2QFN-8 package, and operation from –40°C to +125°C. It delivers 72.8-dB SINAD at 2 kHz and consumes only 4 mW at full throughput with 3.3-V AVDD, targeting high-resolution, space-constrained data acquisition in optical encoders and sonar receivers.

For engineers reviewing the ADS7047IRUGR datasheet, ADS7047IRUGR pinout, ADS7047IRUGR application, or ADS7047IRUGR equivalent, key selection criteria include its SPI-compatible 60-MHz serial interface, integrated offset calibration across temperature, JESD8-7A-compliant digital I/O, and support for independent 1.65–3.6-V DVDD and 2.35–3.6-V AVDD supplies.

Technical Context

The ADS7047IRUGR implements a SAR architecture with internal capacitive DAC and comparator, where sampling occurs on the CS falling edge and conversion is clocked by SCLK with 15-cycle minimum timing. Its fully differential front-end accepts inputs referenced to AVDD/2 ± 0.1 V, enabling rejection of common-mode noise in precision sensor interfaces.

Offset calibration is performed automatically at power-up and optionally during normal operation, maintaining ±1-LSB INL and ±0.2-LSB DNL over full temperature and supply ranges. The device operates in three functional states-ACQ, CNV, and OFFCAL-governed solely by CS and SCLK timing, with SDO tri-stated when CS is high.

Key Specifications

Pinout & Package

The ADS7047IRUGR is housed in an 8-pin X2QFN package measuring 1.5 mm × 1.5 mm × 0.35 mm, with wettable flank leads for automated optical inspection and robust solder-joint reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SAR ADC applications.

Compared with ADS7044IRUGR and ADS7046IRUGR, the ADS7047IRUGR uniquely combines 3-MSPS throughput with fully differential input architecture in the same compact X2QFN-8 package-enabling high-fidelity, noise-immune digitization without sacrificing speed or board space.

Availability

ADS7047IRUGR is available at Aetrix Electronics and suitable for optical encoders, sonar receivers, and ultrasonic flow meters requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADS7047IRUGR 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 specializing in analog and embedded processing technologies, with leadership in precision data converters and low-power signal chain solutions.

The ADS7047IRUGR belongs to TI's high-speed, low-power SAR ADC family designed for space-constrained, battery-operated instrumentation requiring high resolution, wide temperature operation, and minimal external components.

FAQ

What is the maximum sampling rate supported by the ADS7047IRUGR?

The ADS7047IRUGR supports a maximum throughput rate of 3 MSPS, achieved with a 60-MHz SCLK and proper timing adherence to tCONV (15 × tSCLK) and tACQ (80 ns) requirements. This rate is guaranteed across the full operating temperature range (–40°C to +125°C) and AVDD supply range (2.35 V to 3.6 V). At 3 MSPS, the ADS7047IRUGR consumes 4 mW with 3.3-V AVDD, making it suitable for high-speed, low-power data acquisition systems.

Does the ADS7047IRUGR require an external voltage reference?

No, the ADS7047IRUGR uses AVDD as its internal reference voltage-no external reference is needed. The analog input full-scale range is ±AVDD, and the device relies on a clean, well-decoupled AVDD supply (TI recommends a 3.3-µF ceramic capacitor between AVDD and GND). This simplifies BOM and layout while maintaining accuracy, as long as AVDD stability and noise meet specifications outlined in the ADS7047IRUGR datasheet.

How does the integrated offset calibration function in the ADS7047IRUGR?

The ADS7047IRUGR performs automatic offset calibration at power-up and optionally during normal operation. This calibration maintains offset error within ±1 LSB over the full –40°C to +125°C temperature range and 2.35–3.6-V AVDD range. The process occurs in the OFFCAL state, triggered internally or via host-controlled timing, and eliminates the need for system-level calibration routines-reducing firmware complexity and improving long-term measurement stability in the ADS7047IRUGR.

Can the ADS7047IRUGR interface directly with a 1.8-V microcontroller?

Yes, the ADS7047IRUGR supports DVDD from 1.65 V to 3.6 V and complies with JESD8-7A for 1.65–1.95-V logic levels. When DVDD = 1.8 V, VIH = 0.65 × DVDD = 1.17 V and VIL = 0.35 × DVDD = 0.63 V, ensuring reliable communication with standard 1.8-V GPIOs. No level-shifting circuitry is required, simplifying host interface design while preserving timing margins specified in the ADS7047IRUGR switching characteristics table.

What package type and dimensions does the ADS7047IRUGR use?

The ADS7047IRUGR is packaged in an 8-pin X2QFN (RUG) package with nominal body dimensions of 1.5 mm × 1.5 mm × 0.35 mm. It features wettable flank leads for automated optical inspection and high-yield reflow soldering. This ultra-small footprint occupies less than 2.3 mm² of PCB area-ideal for miniaturized sensor modules, handheld instruments, and space-constrained industrial electronics where the ADS7047IRUGR delivers high performance without layout compromise.