Texas Instruments ADS8920BRGET

Overview

ADS8920BRGET from Texas Instruments is a 16-bit, 1-MSPS successive approximation register (SAR) analog-to-digital converter with integrated reference buffer, low-dropout regulator (LDO), and enhanced-SPI interface. It delivers ±0.5-LSB INL, 101-dB SNR at 2 kHz, and operates from single 1.65–5.5-V DVDD and 3–5.5-V RVDD supplies. Used in high-precision data acquisition systems requiring low-latency, no-missing-codes conversion.

For engineers reviewing the ADS8920BRGET datasheet, ADS8920BRGET pinout, ADS8920BRGET application, or ADS8920BRGET equivalent, this page provides verified technical context, validated pin functions, confirmed 4-mm × 4-mm VQFN-24 package mapping, real-world AC/DC performance metrics, and two rigorously cross-checked alternative parts for 16-bit SAR ADC selection.

Technical Context

The ADS8920BRGET implements a true single-cycle, no-latency SAR architecture with internal LDO enabling single-supply operation and eliminating external analog supply regulation. Its integrated reference buffer supports 2.5–5-V external reference input with <±250-µV offset and <1-µV/°C drift, while the enhanced-SPI interface operates up to 20 MHz at 1-MSPS with configurable parity output for host-side data validation.

It features dual power domains (RVDD for analog core, DVDD for digital interface), independent power-down controls for ADC and reference buffer, and a source-synchronous strobe (RVS) supporting both internal and external clock modes - all within –40°C to +125°C extended temperature range.

Key Specifications

Pinout & Package

The ADS8920BRGET is housed in a 24-pin Very Thin Quad Flat No-Lead (VQFN) package with 0.5-mm pitch and exposed thermal pad. Pin assignment follows TI's ADS89xxB family layout, with dedicated analog (RVDD, AINP/AINM, REFM/REFIN), digital (DVDD, CS, SCLK, SDI, SDO-0–SDO-3), and multifunction (RVS, CONVST, RST) terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS8920BRGET, ADS8900BRGET trades higher resolution and SNR for increased power and cost, while ADS8922BRGET offers identical functionality at half the speed and lower power - enabling scalable design reuse across product tiers.

Availability

ADS8920BRGET is available at Aetrix Electronics and suitable for test and measurement equipment, medical imaging front-ends, and industrial motor control systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for ADS8920BRGET 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 ADS89xxB product line was engineered for high-speed, high-accuracy data acquisition in harsh environments - delivering integrated reference buffers, LDOs, and enhanced interfaces to simplify system design while maintaining 16–20-bit performance.

FAQ

What is the maximum sample rate supported by the ADS8920BRGET?

The ADS8920BRGET supports a maximum sample rate of 1 million samples per second (1-MSPS). This is achieved with an acquisition time of 300 ns and conversion time of ≤640 ns, resulting in a total cycle time of 1 µs. The device maintains full 16-bit performance including ±0.5-LSB INL and 101-dB SNR at this rate, as verified in the SBAS707B datasheet under recommended operating conditions.

Does the ADS8920BRGET require an external reference voltage?

Yes, the ADS8920BRGET requires an external reference voltage applied to the REFIN pin, ranging from 2.5 V to 5 V. It integrates a precision reference buffer (REFBUFOUT) that accepts this external reference and conditions it for internal use. The device does not include an internal reference; the buffer eliminates droop and provides low-drift performance, but the reference source itself must be supplied externally.

What package type and dimensions does the ADS8920BRGET use?

The ADS8920BRGET uses a 24-pin VQFN package with 4-mm × 4-mm body size, 0.5-mm pin pitch, and an exposed thermal pad. This RoHS-compliant package is designated RGE in TI documentation and requires soldering the thermal pad to the PCB ground plane for optimal thermal dissipation and noise performance, as specified in the SBAS707B mechanical drawings.

How does the enhanced-SPI interface of the ADS8920BRGET differ from standard SPI?

The ADS8920BRGET enhanced-SPI interface supports 4-bit parallel data output (SDO-0 through SDO-3), enabling full 16-bit conversion results plus parity to be read in a single frame. Unlike standard SPI, it also provides a source-synchronous strobe (RVS) that aligns with valid data windows, simplifying timing closure in FPGA-based systems. It operates up to 20 MHz at 1-MSPS and supports configurable parity for error detection - features not found in basic SPI peripherals.

Can the ADS8920BRGET operate from a single supply voltage?

Yes, the ADS8920BRGET supports single-supply operation via its integrated low-dropout regulator (LDO), which generates a stable 2.85-V analog supply from the RVDD rail. While separate RVDD (3–5.5 V) and DVDD (1.65–5.5 V) supplies are recommended for optimal noise isolation, the LDO allows the analog core to function even if only RVDD is powered - simplifying power architecture in space-constrained designs.