Texas Instruments ADS8323Y/2K

Overview

ADS8323Y/2K from Texas Instruments is a 16-bit, 500kSPS successive approximation register (SAR) analog-to-digital converter with internal 2.5V reference, bipolar differential input range (±2.5V), parallel byte-mode interface, and TQFP-32 package. It delivers 81dB SINAD, 94dB SFDR, and ±4 LSB integral linearity error at industrial temperature range (–40°C to +85°C), enabling high-fidelity data acquisition in motor control feedback loops.

For engineers reviewing the ADS8323Y/2K datasheet, ADS8323Y/2K pinout, ADS8323Y/2K application, or ADS8323Y/2K equivalent, key selection considerations include its 1.6μs conversion time, 350ns acquisition time, CMOS-compatible parallel interface with BYTE-selectable 8/16-bit read mode, and dual-ground (AGND/DGND) layout requirements for noise-sensitive precision systems.

Technical Context

The ADS8323Y/2K implements a capacitor-based SAR architecture with integrated sample-and-hold amplifier and internal 2.5V bandgap reference. Its differential input stage supports true bipolar operation (–VREF to +VREF) and achieves 70dB common-mode rejection at DC and 50dB at 1MHz.

Timing is externally clocked (25kHz–10MHz), with CONVST-triggered conversion initiation, BUSY-driven status signaling, and RD/CS-synchronized parallel data latching. The BYTE pin enables flexible 8-bit bus interfacing via two sequential reads of MSB and LSB bytes.

Key Specifications

Pinout & Package

TQFP-32 package with exposed thermal pad (PBS marking); 5mm × 5mm body, 0.8mm pitch, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS8323Y/2K, ADS8325Y/2K trades parallel interface determinism for lower power and smaller footprint, while AD7682BCPZ offers lower cost and proven reliability in non-real-time ATE fixtures but requires additional support components and sacrifices 200kSPS throughput.

Availability

ADS8323Y/2K is available at Aetrix Electronics and suitable for motor control feedback, optical power monitoring, and automated test equipment requiring stable component supply across extended industrial temperature ranges and long production lifecycles.

Supply support for ADS8323Y/2K 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 ADS8323Y/2K belongs to TI's precision SAR ADC product line, engineered for high-speed, high-resolution data acquisition in noise-sensitive industrial and instrumentation applications where deterministic timing and bipolar input capability are critical.

FAQ

What is the maximum clock frequency supported by the ADS8323Y/2K?

The ADS8323Y/2K supports an external CLOCK input up to 10MHz, which corresponds to its rated 500kSPS sampling rate. The minimum clock period is 100ns, with minimum high and low times of 40ns each. Operation below 25kHz is permitted but reduces throughput proportionally to 1.25kSPS at 25kHz.

Does the ADS8323Y/2K require an external reference voltage?

No - the ADS8323Y/2K includes an internal 2.5V bandgap reference. When using it, REFOUT (pin 32) must be connected directly to REFIN (pin 31). An external reference between 1.5V and 2.55V may also be used to scale the full-scale input range from 3.0V to 5.1V differentially.

How does the BYTE pin function on the ADS8323Y/2K?

When BYTE = low, all 16 data bits appear simultaneously on DB15–DB0. When BYTE = high, only the upper 8 bits (DB15–DB8) are placed on DB7–DB0, enabling use with 8-bit microcontrollers via two sequential RD cycles - first reading LSBs, then MSBs after BYTE toggles.

What is the significance of separate AGND and DGND pins on the ADS8323Y/2K?

Separate analog and digital ground pins prevent digital switching noise from modulating the analog input path. They must be connected to a single clean ground point on the PCB - typically near the device - to maintain 81dB SINAD and avoid degradation of integral linearity beyond ±4 LSB.

Can the ADS8323Y/2K interface directly with bipolar ±10V sensor outputs?

No - the ADS8323Y/2K accepts only ±2.5V differential input. To interface with ±10V sensors, a precision resistive level-shifter circuit (e.g., TI's Figure 21 design using OPA132 and four matched resistors) is required to attenuate and center the signal within the ADC's specified input range.