Texas Instruments ADS8354IRTER

Overview

ADS8354IRTER from Texas Instruments is a dual, simultaneous-sampling, 16-bit analog-to-digital converter (ADC) with fully-differential inputs, 700 kSPS throughput, ±2.5 LSB max INL, 93 dB SNR, and operation over –40°C to 125°C. It serves as the high-resolution data acquisition core in motor position feedback loops and three-phase power control systems.

For engineers reviewing the ADS8354IRTER datasheet, ADS8354IRTER pinout, ADS8354IRTER application, or ADS8354IRTER equivalent, key selection considerations include simultaneous dual-channel sampling integrity, differential input common-mode rejection (70 dB), internal 2.5-V reference accuracy (±1 mV matching), and WQFN-16 package thermal performance (R_θJA = 33.3°C/W).

Technical Context

The ADS8354IRTER integrates two independent 16-bit SAR ADCs sharing a single serial interface, each with dedicated reference inputs (REFIO_A/REFIO_B) and ground references (REFGND_A/REFGND_B) to maintain channel isolation (–110 dB ISOXT). Its 32-clock interface mode enables deterministic timing for synchronized sampling across both channels.

It supports flexible reference configurations: internal 2.5-V buffered reference (±10 ppm/°C drift), external reference up to 5 V, or pseudo-differential input ranges. Power management includes STANDBY (2.5 mA) and SPD (10 µA) modes, with AVDD = 5 V and DVDD = 3.3 V supplies decoupled separately.

Key Specifications

Pinout & Package

ADS8354IRTER is housed in a 3-mm × 3-mm WQFN-16 package with exposed thermal pad (pin 17, connected to PCB GND). The package supports high-density layout and efficient heat dissipation in thermally constrained motor control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7854IRTER, ADS8354IRTER trades 300 kSPS speed for 2-bit resolution gain and 5 dB SNR improvement-critical for resolver-based FOC. Against ADS8354IPWR, the IRTER variant provides 2.6× better thermal dissipation in space-constrained motor control modules.

Availability

ADS8354IRTER is available at Aetrix Electronics and suitable for motor control, power quality monitoring, and optical networking applications requiring stable component supply, extended temperature qualification, and simultaneous dual-channel precision.

Supply support for ADS8354IRTER 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and industrial-grade ICs.

The ADSxx54 family-including ADS8354IRTER-is designed specifically for high-fidelity, simultaneous-sampling data acquisition in real-time control systems such as servo drives, energy meters, and optical amplifiers.

FAQ

What is the maximum input voltage range supported by the ADS8354IRTER?

The ADS8354IRTER supports two differential input ranges: ±V_REF (e.g., ±2.5 V with internal reference) and ±2×V_REF (e.g., ±5 V with external 5-V reference), provided AVDD ≥ 2×V_REF. Absolute input voltage at AINP_x/AINM_x must remain between 0 V and V_REF (or 2×V_REF) relative to their respective REFGND_x pins. Exceeding these limits risks damage or nonmonotonic behavior.

Does the ADS8354IRTER require external reference components?

No-the ADS8354IRTER includes an integrated 2.5-V reference with ±10 ppm/°C drift and ±1 mV matching between channels, eliminating need for external reference ICs in most applications. A 10-µF ceramic capacitor is required at REFIO pins for stability. External references (up to 5 V) are optional for improved accuracy or wider input range.

How does the ADS8354IRTER achieve simultaneous sampling across both channels?

The ADS8354IRTER uses a shared sampling capacitor array and dual independent SAR conversion engines triggered by a single CS falling edge. Aperture jitter is matched to 40 ps between channels, and conversion completes in parallel-ensuring sampled data from AINP_A/AINM_A and AINP_B/AINM_B reflects identical instants in time, critical for vector control algorithms.

What are the power supply requirements for the ADS8354IRTER?

The ADS8354IRTER requires AVDD = 4.5–5.5 V (analog supply) and DVDD = 1.65–5.5 V (digital I/O supply), typically 3.3 V. AVDD powers the ADC core and reference; DVDD powers the serial interface. Supplies must be decoupled with 100-nF ceramics near each VDD pin. Ground separation between AVDD, DVDD, and REFGND_x is mandatory for specified AC performance.

Can the ADS8354IRTER operate in standalone mode without a host processor?

No-the ADS8354IRTER has no internal memory or autonomous control logic. It requires continuous SPI clock (SCLK) and chip-select (CS) signals from a host controller (e.g., C2000 MCU or FPGA) to initiate conversions and read data. All configuration (clock mode, reference source, power mode) is controlled via the serial interface; no default "run" state exists.