Texas Instruments ADS8924BRGET

Overview

ADS8924BRGET from Texas Instruments is a 16-bit, 250-kSPS successive approximation register (SAR) analog-to-digital converter with integrated reference buffer and low-dropout regulator (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 unipolar differential input range ±VREF (2.5 V to 5 V).

For engineers reviewing the ADS8924BRGET datasheet, ADS8924BRGET pinout, ADS8924BRGET application, or ADS8924BRGET equivalent, key selection considerations include its enhanced SPI interface (18-MHz SCLK at 250 kSPS), integrated LDO enabling 1.65–5.5-V DVDD operation, low-power reference buffer with no droop, and 4-mm × 4-mm VQFN-24 package with thermal pad.

Technical Context

The ADS8924BRGET implements a SAR architecture with no latency output and supports both standard and enhanced SPI protocols-including configurable parity bits for host-side data validation. Its internal LDO powers the analog core from DVDD, eliminating need for external analog supply regulation.

It features dual power domains: RVDD (3–5.5 V) for analog circuitry and DVDD (1.65–5.5 V) for digital interface, with independent decoupling requirements (DECAP pins for LDO output, CREFBUF = 10 µF on REFBUFOUT). The device supports quiet-time acquisition (30 ns) and aperture jitter of 2 ps RMS.

Key Specifications

Pinout & Package

ADS8924BRGET 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 ADS8922BRGET, the ADS8924BRGET trades throughput for lower power and reduced thermal load; versus ADS8914BRGET, it offers proven 16-bit linearity with simpler reference design and lower cost-ideal for volume industrial DAQ where 16-bit fidelity suffices.

Availability

ADS8924BRGET is available at Aetrix Electronics and suitable for test and measurement equipment, medical imaging subsystems, and industrial process monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS8924BRGET 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 family was developed to address high-speed, high-accuracy data acquisition needs in space-constrained, thermally demanding applications-emphasizing integrated power management, noise immunity, and simplified digital interfacing.

FAQ

What is the maximum sampling rate of the ADS8924BRGET?

The ADS8924BRGET has a fixed maximum sampling rate of 250 kSPS, corresponding to a minimum conversion cycle time of 4 µs. This rate is guaranteed across the full –40°C to +125°C operating temperature range and does not require oversampling or firmware configuration to achieve.

Does the ADS8924BRGET require an external reference voltage?

The ADS8924BRGET supports both internal and external reference configurations. While it includes an integrated low-droop reference buffer, an external reference voltage (2.5 V to 5 V) must be applied to the REFIN pin; the device does not generate its own reference.

How does the enhanced SPI interface of the ADS8924BRGET differ from standard SPI?

The ADS8924BRGET enhanced SPI adds configurable parity bit transmission on SDO lines and supports 4-bit parallel data output (SDO-0 through SDO-3), enabling faster readout than standard single-bit SPI at the same SCLK frequency-reducing interface timing constraints in FPGA-based systems.

What power supply configurations are supported by the ADS8924BRGET?

The ADS8924BRGET supports independent analog (RVDD: 3–5.5 V) and digital (DVDD: 1.65–5.5 V) supplies. Its integrated LDO allows DVDD to serve as the sole input supply, generating the required analog rail internally-eliminating need for a separate analog LDO.

Is the ADS8924BRGET pin-compatible with other devices in the ADS89xxB family?

Yes, the ADS8924BRGET is pin-to-pin compatible with ADS8920BRGET and ADS8922BRGET within the same RGE (VQFN-24) package, enabling hardware reuse across 1-MSPS, 500-kSPS, and 250-kSPS variants without PCB redesign.