Texas Instruments ADS8920BRGER

Overview

ADS8920BRGER from Texas Instruments is a 16-bit, 1-MSPS successive approximation register (SAR) analog-to-digital converter with integrated reference buffer and low-dropout regulator (LDO), designed for high-precision data acquisition in space-constrained industrial and test equipment. It delivers 96.8dB SNR, ±0.25LSB INL, and operates across –40°C to +125°C with unipolar differential input range up to ±5V.

For engineers reviewing the ADS8920BRGER datasheet, ADS8920BRGER pinout, ADS8920BRGER application, or ADS8920BRGER equivalent, this page provides verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for precision DAQ system design.

Technical Context

The ADS8920BRGER implements a charge-redistribution SAR architecture with internal clocking, enabling zero-latency output at full 1-MSPS throughput. Its integrated LDO accepts single 3–5.5V RVDD supply and powers internal analog circuitry, while the reference buffer supports external 2.5–5V references with <±250µV offset and no droop during burst-mode acquisition.

It uses TI's enhanced multiSPI™ interface-backward-compatible with standard SPI-with configurable parity, 18MHz SCLK support at 1-MSPS, and source-synchronous timing modes. The device disconnects AINP/AINM during conversion and reacquires in <300ns, ensuring accurate sampling of fast-changing signals without external hold circuitry.

Key Specifications

Pinout & Package

RGE package: 24-pin VQFN, 4mm × 4mm body with exposed thermal pad (connected to GND). Compatible with standard reflow profiles and suitable for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8922BRGER and ADS8924BRGER, the ADS8920BRGER delivers the highest throughput (1 MSPS) within the pin-compatible ADS892xB family, making it the only option for real-time closed-loop control or wideband spectral analysis requiring full 1-MSPS sustained sampling.

Availability

ADS8920BRGER is available at Aetrix Electronics and suitable for precision multifunction DAQ, parametric measurement units (PMU), and AC analog input modules requiring stable component supply and long-term industrial lifecycle support.

Supply support for ADS8920BRGER 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 ADS892xB product line was engineered specifically for high-speed, high-accuracy data acquisition in space- and power-constrained industrial, test & measurement, and medical systems-emphasizing integration, thermal robustness, and simplified digital interfacing.

FAQ

What is the maximum sample rate supported by the ADS8920BRGER?

The ADS8920BRGER supports a maximum sample rate of 1 million samples per second (1 MSPS), confirmed in the datasheet Section 1 (Features) and Table 5-6 (Timing Requirements). This is the highest throughput among the ADS892xB family and enables real-time capture of signals with bandwidths up to ~400 kHz. The ADS8920BRGER achieves this without pipeline latency, delivering zero-latency output synchronized to the CONVST rising edge.

Does the ADS8920BRGER require an external reference voltage?

Yes, the ADS8920BRGER requires an external reference voltage applied to the REFIN pin, with a specified range of 2.5 V to 5 V. It does not include an internal reference; instead, it integrates a high-precision reference buffer (REFBUFOUT) that conditions and stabilizes the external reference. The buffer eliminates droop during burst-mode acquisition and supports margining functionality via the EN_MARG register bit, making the ADS8920BRGER suitable for metrology-grade calibration workflows.

What package type and footprint does the ADS8920BRGER use?

The ADS8920BRGER uses the RGE package: a 24-pin VQFN with 4 mm × 4 mm body size and an exposed thermal pad. This is explicitly documented in Table 3-1 (Package Information) and Figure 4-1 (Pin Configuration). The thermal pad must be soldered to a GND plane for optimal thermal performance and EMI suppression. The RGE package is RoHS-compliant and compatible with standard surface-mount assembly processes.

How does the enhanced multiSPI™ interface of the ADS8920BRGER differ from standard SPI?

The ADS8920BRGER's enhanced multiSPI™ interface maintains backward compatibility with standard SPI but adds configurable features including parity output, source-synchronous timing modes (internal or external clock), and optimized data framing that reduces required SCLK frequency by up to 2× at full 1-MSPS throughput. As stated in Section 6.3, this simplifies timing closure with FPGAs and DSPs, lowers EMI, and eases firmware development-while retaining full register-level compatibility with legacy SPI controllers.

What is the operating temperature range for the ADS8920BRGER?

The ADS8920BRGER is fully specified and tested over an operating free-air temperature range of –40°C to +125°C, as confirmed in Section 5.3 (Recommended Operating Conditions) and Section 1 (Features). This extended range qualifies the device for deployment in demanding industrial environments such as motor drives, power inverters, and outdoor instrumentation-where ambient temperatures exceed commercial-grade limits and thermal stability is critical for measurement repeatability.