Texas Instruments ADS8472IBRGZT

Overview

ADS8472IBRGZT 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 high-accuracy data acquisition systems requiring zero-latency conversion and low power (225 mW at 1 MSPS).

For engineers reviewing the ADS8472IBRGZT datasheet, ADS8472IBRGZT pinout, ADS8472IBRGZT application, or ADS8472IBRGZT equivalent, this page delivers verified technical context, package mapping, timing-critical interface behavior, and validated alternative options for medical instrumentation, optical networking, and transducer interface designs.

Technical Context

The ADS8472IBRGZT implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, enabling zero-latency conversion and 650 ns conversion time. Its pseudo-bipolar fully differential input accepts ±V_REF (±4.096 V) span with common-mode range centered at V_REF/2.

It supports dual bus modes: full 16-bit parallel output or 8-bit byte-folded transfer via BYTE control, with CMOS-compatible digital I/O operating from 2.7 V to 5.25 V. Internal reference drift is ±6 ppm/°C, and offset error is ±0.1 mV with ±0.05 ppm/°C drift.

Key Specifications

Pinout & Package

ADS8472IBRGZT is housed in a 48-lead 7×7 mm QFN package (RGZ) with exposed thermal pad requiring PCB soldering for thermal performance. Pin functions are validated per TI SLAS514 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8472IBRGZT, ADS8471IRGZT trades internal reference and tighter linearity for lower cost and external reference flexibility, while ADS8482IBRGZT delivers two extra bits of resolution at higher power and identical footprint-enabling upgrade paths without PCB redesign.

Availability

ADS8472IBRGZT is available at Aetrix Electronics and suitable for medical instrumentation, optical networking, and transducer interface applications requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and guaranteed 16-bit no-missing-code performance.

Supply support for ADS8472IBRGZT 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 ADS8472IBRGZT belongs to TI's high-speed SAR ADC family targeting precision measurement systems; it was engineered to deliver 16-bit accuracy at 1 MSPS with integrated reference and low-power operation for space-constrained instrumentation.

FAQ

What is the guaranteed integral nonlinearity (INL) specification for ADS8472IBRGZT?

The ADS8472IBRGZT guarantees ±0.65 LSB maximum integral nonlinearity over the full industrial temperature range (–40°C to +85°C), measured as endpoint INL per the SLAS514 datasheet. This ensures consistent 16-bit code transitions without deviation exceeding 0.001% of full scale, critical for calibration-sensitive applications like medical diagnostics and metrology.

Does ADS8472IBRGZT include an internal voltage reference, and what is its accuracy?

Yes, ADS8472IBRGZT integrates a 4.096-V internal reference with ±6 ppm/°C temperature drift and initial accuracy of ±0.035% FSR gain error. The reference output (REFOUT) must be connected to REFIN via a 1-µF storage capacitor and 0.1-µF decoupling capacitor to REFM, as specified in Figure 38 of the datasheet.

How does the BYTE pin affect data readout on ADS8472IBRGZT?

When BYTE = 0, ADS8472IBRGZT outputs full 16-bit data on DB[15:0] in one read cycle. When BYTE = 1, it folds the upper 8 bits (D[15:8]) onto DB[15:8] and outputs D[7:0] on DB[7:0] in the first read, then outputs D[15:8] again on DB[15:8] in the second read - enabling 8-bit bus microcontrollers to access 16-bit results without external latches.

What is the minimum acquisition time required before conversion starts on ADS8472IBRGZT?

The ADS8472IBRGZT specifies a minimum acquisition time of 320 ns (typical 350 ns) after the falling edge of CS or CONVST, during which the internal sampling capacitor settles to 16-bit accuracy. This timing must be respected in FPGA or microcontroller firmware to avoid missing codes or increased DNL.

Can ADS8472IBRGZT operate with separate analog and digital supplies, and what are the valid voltage ranges?

Yes, ADS8472IBRGZT uses independent analog (+VA) and digital bus (+VBD) supplies: +VA must be 4.75–5.25 V for the SAR core and analog circuitry, while +VBD supports 2.7–5.25 V for the parallel interface drivers. This separation minimizes digital noise coupling into the analog path and enables mixed-voltage system integration.