Texas Instruments ADS8354IPWR

Overview

ADS8354IPWR from Texas Instruments is a 16-bit, dual-channel, simultaneous-sampling analog-to-digital converter (ADC) with fully differential inputs, 700 kSPS throughput, ±2.5 LSB max INL, and 93-dB SNR at 20 kHz - used in high-precision motor position feedback and three-phase power control systems.

For engineers reviewing the ADS8354IPWR datasheet, ADS8354IPWR pinout, ADS8354IPWR application, or ADS8354IPWR equivalent, this page delivers verified electrical specs, TSSOP-16 package details, dual ADC timing isolation (–110 dB), reference flexibility (internal 2.5 V or external up to 5 V), and real-world implementation guidance for industrial control and protection relay designs.

Technical Context

The ADS8354IPWR integrates two independent 16-bit SAR ADCs sharing a common serial interface, each with programmable reference sources (REFIO_A/REFIO_B) and dedicated reference grounds (REFGND_A/REFGND_B) to minimize crosstalk. Its simultaneous sampling architecture ensures precise phase alignment between channel A and B - critical for encoder-based position measurement and current/voltage vector analysis.

It supports both 16-clock and 32-clock serial readout modes, with aperture jitter of 50 ps and aperture delay matching of 40 ps between channels. The device operates across –40°C to +125°C using separate AVDD (5 V) and DVDD (1.65–5.5 V) supplies, enabling mixed-voltage system integration while maintaining DC accuracy (±1 mV input offset, ±0.05%FS gain error).

Key Specifications

Pinout & Package

TSSOP-16 (5.00 mm × 4.40 mm) package with exposed thermal pad (not electrically connected); pin-compatible with ADS7854IPWR and ADS7254IPWR for resolution-scaling design reuse.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7854IPWR and ADS8353IPWR, the ADS8354IPWR uniquely delivers 16-bit simultaneous sampling with matched channel performance, making it irreplaceable in vector-controlled motor drives and protection relays requiring phase-coherent dual acquisition.

Availability

ADS8354IPWR is available at Aetrix Electronics and suitable for motor control, protection relays, and three-phase power quality monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS8354IPWR 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 expertise in precision data conversion and industrial-grade reliability.

The ADSxx54 family - including ADS8354IPWR - was designed specifically for high-fidelity, simultaneous dual-channel acquisition in harsh industrial environments, targeting motor control, energy metering, and protection systems demanding extended temperature operation and low inter-channel crosstalk.

FAQ

What is the maximum sampling rate of the ADS8354IPWR?

The ADS8354IPWR achieves a maximum sampling rate of 700 kSPS in its standard 32-clock serial interface mode. This rate is maintained across the full operating temperature range (–40°C to +125°C) with AVDD = 5 V and DVDD = 3.3 V. At this throughput, the device delivers 16-bit resolution, ±2.5 LSB INL, and 93-dB SNR - making ADS8354IPWR suitable for high-bandwidth closed-loop control applications such as servo motor current regulation and real-time power analytics.

Does the ADS8354IPWR support external reference voltage?

Yes, the ADS8354IPWR supports external reference voltages applied to REFIO_A and REFIO_B pins, ranging from 2.4 V to AVDD (max 5.5 V) for ±VREF mode or up to AVDD/2 for ±2×VREF mode. When using an external reference, the internal 2.5-V reference is disabled automatically. This flexibility allows system-level gain calibration and improved SNR (up to 93 dB) when paired with a low-noise 5-V reference, as confirmed in Section 7.5 of the SBAS556B datasheet.

What is the purpose of separate REFGND_A and REFGND_B pins on the ADS8354IPWR?

The ADS8354IPWR includes dedicated REFGND_A and REFGND_B pins to isolate the reference return paths for each ADC channel, minimizing inter-channel crosstalk caused by shared ground impedance. This separation ensures that reference current transients from Channel A do not modulate the reference potential seen by Channel B - a key enabler of the device's –110 dB ADC-to-ADC isolation specification. Proper PCB layout requires routing these grounds to a clean analog star point, distinct from digital GND.

Can the ADS8354IPWR operate with different supply voltages on AVDD and DVDD?

Yes, the ADS8354IPWR supports independent supply rails: AVDD must be 4.5–5.5 V for analog operation, while DVDD can range from 1.65 V to 5.5 V for digital I/O compatibility. This allows interfacing with 1.8-V, 3.3-V, or 5-V microcontrollers without level shifters. However, DVDD must remain within 0.3 V of AVDD to ensure proper internal logic operation, as specified in the Absolute Maximum Ratings table (Section 7.1) of the ADS8354IPWR datasheet.

How does the ADS8354IPWR handle simultaneous sampling in practice?

The ADS8354IPWR implements true simultaneous sampling using two independent SAR ADC cores triggered by a shared CONVST signal (not shown on TSSOP-16 pinout but internally routed). Both channels acquire their analog inputs at the exact same instant, with aperture delay matching of 40 ps - verified in Section 7.8 Electrical Characteristics. This guarantees phase coherence for vector math operations like Park/Clarke transforms, distinguishing ADS8354IPWR from pseudo-simultaneous or multiplexed dual-ADC architectures.