Texas Instruments ADS8924BRGER

Overview

ADS8924BRGER from Texas Instruments is a 16-bit, 250-kSPS successive approximation register (SAR) analog-to-digital converter with integrated reference buffer and LDO, designed for high-precision data acquisition in single-supply systems. It delivers ±0.25-LSB INL, 96.8-dB SNR, and –125-dB THD at 2 kHz, operating across –40°C to +125°C with 4-mm × 4-mm VQFN packaging.

For engineers reviewing the ADS8924BRGER datasheet, ADS8924BRGER pinout, ADS8924BRGER application, or ADS8924BRGER equivalent, this page provides verified technical context, validated pin functions, confirmed AC/DC performance metrics, and real-world implementation guidance for test equipment, medical imaging, and industrial DAQ systems.

Technical Context

The ADS8924BRGER implements a SAR architecture with no latency output and uses TI's Enhanced-SPI interface-supporting 18-MHz SCLK at 250-kSPS while appending parity bits for host-side data validation. Its integrated LDO enables operation from a single 1.65–5.5-V DVDD supply, eliminating external regulators.

It features a low-droop internal reference buffer accepting 2.5–5-V external references on REFIN, with REFBUFOUT pins providing buffered output and serving as reference input. The device supports unipolar differential input ranges of ±VREF and includes dedicated CONVST-triggered conversion control and RVS status signaling.

Key Specifications

Pinout & Package

ADS8924BRGER is housed in a 24-pin VQFN package (RGE) with 4-mm × 4-mm footprint and exposed thermal pad connected to GND. Pin functions are validated per TI SBAS729B Rev B datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8922BRGER and ADS8914BRGER, the ADS8924BRGER uniquely balances 16-bit precision, 250-kSPS throughput, and best-in-class 96.8-dB SNR-making it optimal for cost-sensitive, thermally demanding DAQ systems where spectral purity and temperature stability are critical.

Availability

ADS8924BRGER is available at Aetrix Electronics and suitable for test and measurement equipment, medical imaging subsystems, and industrial process control DAQ requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADS8924BRGER 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 signal chain solutions.

The ADS892xB family-including ADS8924BRGER-is engineered for high-speed, high-accuracy data acquisition in space-constrained, thermally demanding environments, emphasizing integrated reference buffering, low-noise performance, and simplified system power design.

FAQ

What is the maximum sample rate supported by the ADS8924BRGER?

The ADS8924BRGER is rated for a maximum sample rate of 250 kSPS, corresponding to a minimum conversion cycle time of 4 µs. This rate is fixed for the ADS8924B variant and is validated across the full –40°C to +125°C operating temperature range. The device achieves this throughput using TI's Enhanced-SPI interface with an 18-MHz SCLK, reducing timing constraints versus standard SPI implementations.

Does the ADS8924BRGER require an external reference voltage?

Yes, the ADS8924BRGER requires an external reference voltage applied to the REFIN pin within 2.5 V to 5 V. It integrates a low-droop reference buffer (REFBUFOUT pins 5 and 7), which can be used to buffer and feed back the external reference-but does not generate its own reference. The internal LDO powers the analog core but does not replace the external reference function.

What package type and pin count does the ADS8924BRGER use?

The ADS8924BRGER uses a 24-pin VQFN package (RGE) with a 4-mm × 4-mm body and exposed thermal pad. Pin functions-including AINP/AINM, CONVST, CS, SCLK, SDI, SDO-0 through SDO-3, RVDD, DVDD, GND, REFIN, REFM, REFBUFOUT (pins 5 and 7), DECAP (pins 13 and 14), RST, and RVS-are fully documented in TI SBAS729B Rev B and validated for this exact part number.

How does the Enhanced-SPI interface of the ADS8924BRGER differ from standard SPI?

The ADS8924BRGER Enhanced-SPI interface operates at lower SCLK frequencies (18 MHz at 250-kSPS vs up to 52 MHz for standard SPI), incorporates configurable parity bit output for error detection, and enforces quiet-time intervals between conversions to minimize digital switching noise coupling into analog sections-features not present in generic SPI peripherals.

Can the ADS8924BRGER operate from a single 3.3-V supply?

Yes, the ADS8924BRGER supports single-supply operation with DVDD = 3.3 V and RVDD = 3.3 V. Its integrated LDO generates a regulated 2.85-V analog supply from DVDD, and the digital interface remains fully functional across 1.65–5.5 V. However, REFIN must still be supplied externally (e.g., 2.5 V or 3.3 V reference IC) as the LDO does not replace the reference function.