Texas Instruments ADS8365IPAGR

Overview

ADS8365IPAGR from Texas Instruments is a 16-bit, 250kSPS, six-channel simultaneous-sampling SAR analog-to-digital converter with fully differential inputs, internal 2.5V reference, and parallel interface in TQFP-64 package. It delivers 4µs per-channel throughput, 80dB CMRR at 50kHz, and operates across –40°C to +85°C for motor control and multi-axis positioning systems.

For engineers reviewing the ADS8365IPAGR datasheet, ADS8365IPAGR pinout, ADS8365IPAGR application, or ADS8365IPAGR equivalent, key selection criteria include simultaneous sampling capability across three channel pairs (A/B/C), 16-bit resolution with ±4 LSB INL, low-power Nap mode (5mW), and support for both 3V and 5V digital I/O supplies.

Technical Context

The ADS8365IPAGR integrates six independent SAR ADC cores, each paired with a differential sample-and-hold amplifier, enabling true simultaneous acquisition across all six channels. Its architecture maintains full differential signaling from input to conversion core, delivering 80dB common-mode rejection at 50kHz and 95dB channel-to-channel isolation.

It supports three operational modes-direct address, cycle, and FIFO-with flexible timing via CLK, RD/WR, CS, and BYTE controls. The device includes dedicated hold signals (HOLDA/HOLDB/HOLDC) per channel pair and an internal 2.5V reference with ±1% initial accuracy and 20ppm/°C drift.

Key Specifications

Pinout & Package

TQFP-64 package with exposed thermal pad; 10 mm × 10 mm body, 0.5 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.

Compared with ADS8364IPAG and AD7656ASTZ, the ADS8365IPAGR uniquely combines internal 2.5V reference, parallel interface for low-latency access, and guaranteed 16-bit monotonicity - making it optimal for deterministic real-time control loops requiring minimal external components.

Availability

ADS8365IPAGR is available at Aetrix Electronics and suitable for motor control, multi-axis positioning systems, and 3-phase power control requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for ADS8365IPAGR 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 ICs.

The ADS8365IPAGR belongs to TI's high-performance simultaneous-sampling ADC product line, designed specifically for real-time control applications demanding phase-coherent multi-channel acquisition in harsh electrical environments.

FAQ

What is the maximum clock frequency supported by the ADS8365IPAGR?

The ADS8365IPAGR supports a clock frequency range of 0.05 MHz to 5 MHz. At 5 MHz, it achieves its rated 250kSPS throughput with 3.2 µs conversion time per ADC. Operation outside this range may result in reduced accuracy or failure to meet timing specifications such as aperture jitter (50 ps typical) and acquisition time (800 ns).

Does the ADS8365IPAGR require an external reference voltage?

No - the ADS8365IPAGR includes an internal 2.5V reference with ±1% initial accuracy and ±20 ppm/°C drift. It can operate using REFOUT (pin 61) connected directly to REFIN (pin 62). An external reference between 1.5V and 2.6V is optional and used only when tighter reference tolerance or different full-scale range is needed.

How does the HOLDA/HOLDB/HOLDC functionality work on the ADS8365IPAGR?

HOLDA, HOLDB, and HOLDC are active-low digital inputs that initiate simultaneous sampling on their respective channel pairs: A0/A1, B0/B1, and C0/C1. Asserting HOLDA captures both A0 and A1 at the same instant; similarly for HOLDB and HOLDC. This enables flexible group-level sampling control without requiring global hold, supporting partial-channel acquisition strategies in the ADS8365IPAGR.

What power supply configurations does the ADS8365IPAGR support?

The ADS8365IPAGR uses separate analog (AVDD = 4.75–5.25 V) and digital I/O (BVDD = 2.7–5.5 V) supplies. AVDD powers the ADC core and reference; BVDD powers the parallel interface. This dual-supply architecture allows interfacing with 3V or 5V logic families while maintaining analog integrity - a key feature of the ADS8365IPAGR design.

Can the ADS8365IPAGR operate in low-power modes, and how are they enabled?

Yes - the ADS8365IPAGR supports Nap mode (5 mW) and Power-down mode (50 µW). Nap mode is enabled by driving the NAP pin (pin 20) high; Power-down is activated via hardware reset or software command through the control register. Both modes retain register settings and reference state, allowing rapid resumption of conversion - essential for duty-cycled industrial monitoring using the ADS8365IPAGR.