Texas Instruments ADS8319IBDRCT

Overview

ADS8319IBDRCT 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 features ±1.5-LSB max INL, 93.6-dB typical SNR at 10 kHz, and operates from 2.25–5.5-V external reference - used in portable instrumentation for high-accuracy voltage monitoring.

For engineers reviewing the ADS8319IBDRCT datasheet, ADS8319IBDRCT pinout, ADS8319IBDRCT application, or ADS8319IBDRCT 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 options.

Technical Context

The ADS8319IBDRCT implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling true zero-latency conversion at full 500-kSPS throughput. Its digital interface supports both 3-wire (CS mode) and 4-wire configurations, with CONVST doubling as chip select and SDI level at conversion start selecting operational mode.

It uses separate analog (+VA) and digital I/O (+VBD) supplies (2.375–5.5 V), supports external reference inputs from 2.25 V to +VA + 0.1 V, and delivers stable performance across –40°C to +85°C with <6 ps RMS aperture jitter and 15-MHz small-signal bandwidth.

Key Specifications

Pinout & Package

ADS8319IBDRCT is available in a 10-pin VSSOP package (3.00 mm × 3.00 mm body size) with exposed thermal pad not connected internally. Pin functions are validated per TI SLAS600C datasheet Rev C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8319IBDRCT, ADS8320IBDRCT trades 200 kSPS extra throughput for higher active power, while ADS8322IBDRCT sacrifices reference flexibility for reduced component count - both retain identical pinout and SPI protocol compatibility.

Availability

ADS8319IBDRCT is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial data acquisition systems, medical electronics, and optical networking monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS8319IBDRCT 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, embedded processing, and connectivity technologies with decades of precision data converter innovation.

The ADS8319IBDRCT belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, and low-latency signal acquisition in portable and space-constrained systems.

FAQ

What is the maximum sampling rate supported by the ADS8319IBDRCT?

The ADS8319IBDRCT supports a maximum sampling rate of 500 kSPS, delivering a complete 16-bit conversion every 2 µs. This rate is achievable with +VBD ≥4.5 V and proper timing margins; at lower +VBD (e.g., 2.7 V), the minimum SCLK period increases to 30 ns but full throughput remains attainable with adjusted interface timing.

Does the ADS8319IBDRCT require an external reference voltage?

Yes, the ADS8319IBDRCT requires an external reference voltage applied to the REFIN pin. It accepts 2.25 V to +VA + 0.1 V, supporting common references such as 2.5 V, 4.096 V, or 5 V. The device does not include an internal reference, so external decoupling (0.1 µF + 10 µF) is mandatory for stable operation.

Can the ADS8319IBDRCT operate with different analog and digital supply voltages?

Yes, the ADS8319IBDRCT uses independent analog (+VA) and digital I/O (+VBD) supplies. +VA ranges from 4.5 V to 5.5 V, while +VBD supports 2.375 V to 5.5 V - enabling direct interfacing with 1.8-V, 2.7-V, or 3.3-V microcontrollers without level shifters.

What package options are available for the ADS8319IBDRCT?

The ADS8319IBDRCT is offered in two RoHS-compliant packages: 10-pin VSSOP (DGS) and 10-pin VSON (DRC), both with 3.00 mm × 3.00 mm body size. The VSON variant includes an exposed thermal pad for improved heat dissipation, though it is not electrically connected in this device.

How does the daisy-chain mode work on the ADS8319IBDRCT?

In daisy-chain mode, multiple ADS8319IBDRCT devices share one SPI bus: SCLK and CONVST are common, while SDO of each device connects to SDI of the next. A single 16×N-bit frame reads all N devices sequentially, eliminating need for individual chip selects and simplifying multi-channel synchronization.