Texas Instruments ADS8472IBRGZR

Overview

ADS8472IBRGZR from Texas Instruments is a 16-bit, 1-MSPS pseudo-bipolar fully differential SAR analog-to-digital converter with integrated 4.096-V reference, ±0.65 LSB max INL, ±0.5 LSB max DNL, and 95 dB SNR. It operates over –40°C to +85°C in a 48-pin 7×7 QFN package and targets high-accuracy data acquisition in medical instruments and transducer interfaces.

For engineers reviewing the ADS8472IBRGZR datasheet, ADS8472IBRGZR pinout, ADS8472IBRGZR application, or ADS8472IBRGZR equivalent, key selection criteria include its zero-latency parallel interface, unipolar differential input range (±V_REF), internal reference drift (±6 ppm/°C), and support for both 8-bit and 16-bit bus transfers under 2.7–5.25 V digital supply.

Technical Context

The ADS8472IBRGZR implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, enabling zero-latency conversion at 1 MSPS. Its pseudo-bipolar fully differential input accepts ±V_REF (±4.096 V) differential span while maintaining common-mode range centered at V_REF/2.

It features dual power domains: +VA (4.75–5.25 V) for analog circuitry and +VBD (2.7–5.25 V) for digital I/O, with separate AGND and BDGND pins. The internal 4.096-V reference includes start-up time of 120 ms and ±6 ppm/°C drift, buffered at REFOUT for external use or internal feedback.

Key Specifications

Pinout & Package

The ADS8472IBRGZR is housed in a thermally enhanced 48-pin QFN package (7 mm × 7 mm, 0.4 mm pitch) with exposed thermal pad requiring solder connection to PCB ground plane for optimal thermal and mechanical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8472IBRGZR, ADS8471IRGZR trades internal reference integration for marginally relaxed linearity, while ADS8482IBRGZR upgrades resolution and dynamic performance at the cost of power and compatibility with legacy 16-bit data paths.

Availability

ADS8472IBRGZR 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 traceable sourcing.

Supply support for ADS8472IBRGZR 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 ADS8472IBRGZR belongs to TI's high-speed SAR ADC product line, engineered for applications demanding zero-latency, high linearity, and integrated reference stability in space- and power-constrained systems.

FAQ

What is the maximum sample rate supported by the ADS8472IBRGZR?

The ADS8472IBRGZR supports a maximum throughput rate of 1 MSPS, with a fixed conversion time of 650 ns. This enables continuous sampling of input signals up to 500 kHz while maintaining Nyquist compliance. The device achieves this using an internal conversion clock and charge-redistribution SAR architecture without pipeline latency.

Does the ADS8472IBRGZR require an external reference voltage?

No, the ADS8472IBRGZR includes a factory-trimmed 4.096-V internal reference with ±6 ppm/°C drift and 120 ms start-up time. It can operate autonomously using REFOUT tied to REFIN with 1-µF storage and 0.1-µF decoupling capacitors. An external reference (3.0–4.2 V) may be applied to REFIN if higher accuracy or different voltage scaling is needed.

How does the BYTE pin affect data output on the ADS8472IBRGZR?

The BYTE pin on the ADS8472IBRGZR configures the parallel bus transfer mode: when BYTE = 0, full 16-bit data appears on DB[15:0]; when BYTE = 1, the upper byte (DB[15:8]) carries D[9:2] of the MSB word, enabling 8-bit microcontroller interfacing without data bus remapping. This foldback mode retains 16-bit resolution but reduces physical bus width.

What are the power supply requirements for the ADS8472IBRGZR?

The ADS8472IBRGZR requires two independent supplies: +VA (4.75–5.25 V) for analog circuitry and +VBD (2.7–5.25 V) for digital I/O. Typical supply current is 45–50 mA at +VA and ~1 mA at +VBD, resulting in 225–250 mW total dissipation at 1 MSPS. Separate AGND and BDGND connections are mandatory for noise isolation.

Can the ADS8472IBRGZR interface directly with a 3.3-V FPGA or microcontroller?

Yes, the ADS8472IBRGZR supports +VBD from 2.7 V to 5.25 V, making it compatible with 3.3-V logic families without level shifters. Its CMOS-compatible digital outputs (VIH = +VBD – 1 V, VOL = 0.8 V max) meet 3.3-V interface thresholds. Ensure BDGND is tied to the FPGA's digital ground and decouple +VBD with 0.1-µF ceramic capacitors near the package.