Texas Instruments ADS7854IRTET

Overview

ADS7854IRTET from Texas Instruments is a 14-bit, 1 MSPS dual simultaneous-sampling analog-to-digital converter with fully differential inputs, ±1.5 LSB max INL, 88 dB SNR (typ), and operation over –40°C to +125°C. It supports independent reference sources per channel and is used in high-precision motor position feedback and three-phase power control systems.

For engineers reviewing the ADS7854IRTET datasheet, ADS7854IRTET pinout, ADS7854IRTET application, or ADS7854IRTET equivalent, this page delivers verified specifications, package mapping, functional context, and real-world implementation guidance for industrial ADC selection and layout planning.

Technical Context

The ADS7854IRTET integrates two independent SAR ADC cores with synchronized sampling control, enabling true simultaneous capture of two fully differential analog signals. Its flexible serial interface operates across 1.65–5.5 V DVDD and supports both 16-clock and 32-clock readout modes.

Each channel features programmable buffered 2.5-V internal reference (±1 mV matching), dedicated REFGND pins, and support for external reference up to AVDD/2. Aperture jitter is 50 ps, and ADC-to-ADC isolation exceeds –90 dB at 15 kHz.

Key Specifications

Pinout & Package

ADS7854IRTET is available in a 3-mm × 3-mm WQFN-16 package with exposed thermal pad. Pin assignment is identical to the TSSOP-16 variant (PW), ensuring layout flexibility across density requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8354IRTET and ADS7254IRTET, the ADS7854IRTET delivers optimal balance of speed (1 MSPS), precision (14-bit), and noise performance (88 dB SNR) for mid-tier motor control and power quality applications-without requiring PCB redesign due to shared WQFN-16 footprint.

Availability

ADS7854IRTET is available at Aetrix Electronics and suitable for motor control, three-phase power monitoring, and protection relay applications requiring stable component supply, extended temperature operation, and long-term industrial lifecycle support.

Supply support for ADS7854IRTET 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 signal chain solutions.

The ADSxx54 family-including ADS7854IRTET-is designed specifically for high-fidelity simultaneous sampling in demanding industrial automation, energy infrastructure, and motor drive systems where channel synchronization and DC/AC accuracy are non-negotiable.

FAQ

What is the maximum sampling rate of the ADS7854IRTET?

The ADS7854IRTET achieves a maximum throughput of 1 MSPS in both 16-clock and 32-clock serial interface modes. This rate is guaranteed across the full operating temperature range (–40°C to +125°C) with AVDD = 5 V and DVDD = 3.3 V. The device maintains specified INL, SNR, and THD performance at this rate, making ADS7854IRTET suitable for real-time control loops requiring sub-microsecond sampling intervals.

Does the ADS7854IRTET support external reference voltage?

Yes, the ADS7854IRTET supports external reference input on REFIO_A and REFIO_B pins, accepting 2.4 V to AVDD/2 (for ±2×VREF mode) or 2.4 V to AVDD (for ±VREF mode). When using external reference, the internal 2.5-V reference must be disabled via configuration register CFR.B6 = 0. ADS7854IRTET specifies ±0.1 μA DC leakage and recommends 10 μF ceramic decoupling per REFIO pin for stability.

What package options are available for the ADS7854IRTET?

The ADS7854IRTET is offered exclusively in the WQFN-16 (RTE) package: 3.00 mm × 3.00 mm body with 0.5-mm pitch and exposed thermal pad. This matches the pinout of the TSSOP-16 (PW) variant but provides superior thermal performance (RθJB = 7.3°C/W vs. 39.1°C/W) and smaller footprint-critical for space-constrained motor drive and power module designs using ADS7854IRTET.

How does the ADS7854IRTET handle channel-to-channel isolation?

The ADS7854IRTET achieves –90 dB ADC-to-ADC isolation at 15 kHz (fIN = 15 kHz, 10%FS), measured between channels A and B. This is enabled by separate analog front-end paths, isolated REFGND_A/REFGND_B supplies, and differential architecture. The specification ensures minimal crosstalk during simultaneous sampling-essential for accurate phase difference measurement in three-phase systems using ADS7854IRTET.

Can the ADS7854IRTET operate with different analog and digital supply voltages?

Yes, ADS7854IRTET supports independent supply domains: AVDD = 4.5–5.5 V for the analog core and DVDD = 1.65–5.5 V for digital I/O. This allows interfacing with 1.8-V, 3.3-V, or 5-V controllers without level shifters. Decoupling is required per supply-0.1 μF + 10 μF for AVDD, 0.1 μF for DVDD-and AVDD and DVDD grounds must be connected at a single point near the device to minimize noise coupling in ADS7854IRTET systems.