Texas Instruments ADS8319IBDGSR

Overview

ADS8319IBDGSR from Texas Instruments is a 16-bit, 500-kSPS successive-approximation register (SAR) analog-to-digital converter with unipolar single-ended input (0 V to VREF), SPI-compatible serial interface, and zero-latency operation. It operates from 2.25-V to 5.5-V external reference, delivers 93.6-dB SNR at 10 kHz, and achieves ±1.5-LSB max INL and ±1-LSB max DNL. It targets precision data acquisition in battery-powered instrumentation.

For engineers reviewing the ADS8319IBDGSR datasheet, ADS8319IBDGSR pinout, ADS8319IBDGSR application, or ADS8319IBDGSR equivalent, key selection considerations include its micropower scaling (3.6 mW at 100 kSPS), daisy-chain-capable 50-MHz SPI interface, low 0.25 µW power-down current, and dual 10-pin VSSOP/VSON package support for space-constrained designs.

Technical Context

The ADS8319IBDGSR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling true zero-latency conversion at full 500-kSPS throughput. Its control logic supports both 3-wire (CS mode) and 4-wire SPI configurations, with SDI level at conversion start determining interface mode.

It features a dedicated Busy Indicator output synchronized to SCLK, simplifying host synchronization. The analog input stage accepts unipolar single-ended signals referenced to REFIN, while –IN is internally limited to ±0.1 V and typically grounded via decoupling capacitance.

Key Specifications

Pinout & Package

The ADS8319IBDGSR is packaged in a 10-pin VSSOP (DGS) with nominal body size 3.00 mm × 3.00 mm, optimized for compact PCB layouts and thermal performance (RθJA = 107.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8319IBDGSR, ADS8320IBDGSR trades zero-latency and SNR for speed, while ADS8323IBDGSR replaces unipolar flexibility with differential rejection-neither offers pin-to-pin compatibility, requiring layout and firmware updates.

Availability

ADS8319IBDGSR is available at Aetrix Electronics and suitable for battery-powered equipment, industrial process controls, and portable medical electronics requiring stable component supply and long-term manufacturability.

Supply support for ADS8319IBDGSR 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 low-power design.

The ADS8319IBDGSR belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, and fast-turnaround data acquisition in portable and industrial instrumentation.

FAQ

What is the maximum supported reference voltage for the ADS8319IBDGSR?

The ADS8319IBDGSR supports an external reference voltage (REFIN) from 2.25 V to 4.096 V, with absolute maximum of +VA + 0.1 V. At +VA = 5 V, the practical upper limit is 5.1 V, but operation above 4.096 V may reduce accuracy due to increased gain error drift. The ADS8319IBDGSR is commonly paired with 4.096-V references like the REF5040 for optimal 16-bit code utilization.

Does the ADS8319IBDGSR support true differential input mode?

No, the ADS8319IBDGSR is a unipolar, single-ended input ADC. Its –IN pin is not a full differential input but rather a limited-range (±0.1 V) complementary terminal typically tied to ground via a decoupling capacitor. For true differential operation, TI recommends the ADS8323IBDGSR, which shares the same package and speed but requires redesign of the analog front-end and firmware interface.

How does the ADS8319IBDGSR achieve zero-latency operation?

The ADS8319IBDGSR achieves zero-latency operation through its successive-approximation register (SAR) architecture with integrated sample-and-hold-unlike pipelined or sigma-delta ADCs, it produces the final 16-bit result immediately upon conversion completion, with no pipeline stages or digital filtering delay. This makes the ADS8319IBDGSR ideal for closed-loop control and real-time waveform capture where deterministic timing is critical.

Can the ADS8319IBDGSR operate with a 3.3-V digital supply (+VBD)?

Yes, the ADS8319IBDGSR supports +VBD from 2.375 V to 5.5 V, including standard 3.3-V logic levels. At +VBD = 3.3 V, SCLK timing relaxes slightly (min period increases from 20 ns to 30 ns), and VIH/VIL thresholds scale accordingly (VIH ≥ 2.31 V, VIL ≤ 0.99 V). All core specifications-including 500-kSPS throughput and 93.6-dB SNR-remain guaranteed across this range.

What package options are available for the ADS8319IBDGSR?

The ADS8319IBDGSR is offered in two 10-pin packages: VSSOP (DGS) and VSON (DRC), both with identical 3.00 mm × 3.00 mm body size. The VSSOP variant provides exposed pad-less thermal performance (RθJA = 107.5°C/W), while the VSON includes an exposed thermal pad for improved heat dissipation (RθJA = 87.2°C/W). Both are RoHS-compliant and rated MSL2 at 260°C.