Texas Instruments ADS8472IRGZTG4

Overview

ADS8472IRGZTG4 from Texas Instruments is a 16-bit, 1-MSPS pseudo-bipolar fully differential SAR analog-to-digital converter with integrated 4.096-V reference, parallel 16-/8-bit interface, and zero-latency operation. It delivers ±0.65 LSB max INL, 95 dB SNR, and 225 mW power consumption at full throughput, targeting high-accuracy data acquisition in medical instruments and transducer interfaces.

For engineers reviewing the ADS8472IRGZTG4 datasheet, ADS8472IRGZTG4 pinout, ADS8472IRGZTG4 application, or ADS8472IRGZTG4 equivalent, key selection criteria include its guaranteed 16-bit no-missing-codes performance over –40°C to +85°C, ±0.1-mV offset error, 48-pin 7×7 QFN package, and support for unipolar differential input range of ±V_REF.

Technical Context

The ADS8472IRGZTG4 employs a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, enabling true zero-latency conversion. Its internal 4.096-V reference features ±6 ppm/°C drift and is buffered for low-noise operation, while the pseudo-bipolar fully differential input accepts ±V_REF differential span with common-mode range centered at V_REF/2.

Timing is controlled via asynchronous parallel interface signals - CONVST initiates conversion on falling edge, BUSY indicates active conversion, and RD/CS manage data read cycles. The device supports both 16-bit single-cycle reads and 8-bit folded-back transfers using the BYTE pin, with all timing specified under 20-pF load conditions.

Key Specifications

Pinout & Package

ADS8472IRGZTG4 is housed in a thermally enhanced 48-pin QFN package (7 mm × 7 mm, RGZ designation) with exposed thermal pad requiring PCB soldering for thermal and mechanical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8472IRGZTG4, ADS8471IRGZT removes integrated reference functionality to reduce cost and die size, while ADS8482IPM extends resolution and reference precision at the expense of package size and unit price - making ADS8472IRGZTG4 the optimal balance of accuracy, integration, and compactness for industrial DAQ.

Availability

ADS8472IRGZTG4 is available at Aetrix Electronics and suitable for medical instrumentation, optical networking monitoring, and high-accuracy data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for ADS8472IRGZTG4 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 converters and industrial-grade IC design.

The ADS8472IRGZTG4 belongs to TI's high-speed SAR ADC family optimized for zero-latency, high-SFDR, and integrated reference performance in demanding measurement applications - designed specifically for systems where accuracy, speed, and simplicity must coexist.

FAQ

What is the guaranteed operating temperature range for the ADS8472IRGZTG4?

The ADS8472IRGZTG4 is fully characterized and guaranteed over the industrial temperature range of –40°C to +85°C. All specifications - including INL, DNL, offset error, and SNR - are validated across this range, ensuring reliable performance in harsh environments like factory automation and outdoor instrumentation. The device uses thermal design techniques including dedicated AGND/BDGND separation and thermal-pad soldering to maintain stability.

Does the ADS8472IRGZTG4 require an external reference, or can it operate with its internal reference?

The ADS8472IRGZTG4 can operate with either its internal 4.096-V reference or an external reference applied to the REFIN pin. When using the internal reference, REFOUT must be connected to REFIN via a 0.1-µF capacitor, and a 1-µF storage capacitor must be placed between REFOUT and REFM. Internal reference operation eliminates external components and meets ±0.035 %FSR gain error and ±6 ppm/°C drift specs - making ADS8472IRGZTG4 self-contained for most precision applications.

How does the BYTE pin affect data readout on the ADS8472IRGZTG4?

The BYTE pin on the ADS8472IRGZTG4 selects between 16-bit and 8-bit parallel data transfer modes. When BYTE = 0, DB[15:0] outputs the full 16-bit result in one cycle. When BYTE = 1, the upper byte (DB[15:8]) carries D[9:2] of the MSB word, and the lower byte (DB[7:0]) carries D[15:8], enabling 8-bit bus access without external latches. This foldback mode simplifies interface to legacy 8-bit microcontrollers while preserving full 16-bit resolution.

What is the significance of "pseudo-bipolar" input in the ADS8472IRGZTG4?

"Pseudo-bipolar" in the ADS8472IRGZTG4 means the differential input accepts a unipolar voltage range of ±V_REF (i.e., –4.096 V to +4.096 V differential) but does not require negative supply rails. The analog inputs (+IN and –IN) operate between –0.2 V and V_REF + 0.2 V relative to AGND, allowing use with single 5-V analog supplies. This simplifies power design versus true bipolar-input ADCs while retaining wide dynamic range for AC-coupled or offset-referenced sensor signals.

Can the ADS8472IRGZTG4 achieve 16-bit performance without calibration?

Yes - the ADS8472IRGZTG4 guarantees 16-bit no-missing-codes performance across temperature and supply variations, with typical INL of ±0.4 LSB and max ±0.65 LSB. Its capacitor DAC architecture, matched internal components, and factory characterization eliminate the need for end-system offset/gain calibration in most applications. Only systems demanding <±0.1 LSB absolute accuracy may require one-time calibration - supported by the device's low drift (±0.05 ppm/°C offset, ±0.4 ppm/°C gain).