Texas Instruments ADS7254IRTET

Overview

ADS7254IRTET from Texas Instruments is a dual, simultaneous-sampling, 12-bit analog-to-digital converter (ADC) with fully differential inputs, 1 MSPS throughput, ±1 LSB max INL, 72 dB SNR, and operation over –40°C to +125°C. It supports independent reference sources per channel and is used in motor position feedback loops requiring synchronized sampling of encoder A/B signals.

For engineers reviewing the ADS7254IRTET datasheet, ADS7254IRTET pinout, ADS7254IRTET application, or ADS7254IRTET equivalent, this page delivers verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative parts - all confirmed against TI's SBAS556B production datasheet.

Technical Context

The ADS7254IRTET integrates two independent SAR ADC cores sharing a common serial interface, enabling true simultaneous sampling with <40 ps inter-channel aperture mismatch. Its dual buffered 2.5-V internal reference supports system-level gain calibration without external components.

It operates in 16- or 32-clock interface modes, supports AVDD = 5 V and DVDD = 1.65–5.5 V, and features STANDBY and power-down modes for dynamic power management. All timing, DC accuracy, and AC performance specs are fully characterized across the extended industrial temperature range.

Key Specifications

Pinout & Package

ADS7254IRTET is packaged in a 16-pin WQFN (3 mm × 3 mm) with exposed thermal pad. Pin compatibility is maintained across the ADSxx54 family (ADS8354/ADS7854/ADS7254), enabling resolution-scaling on same PCB layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7254IRTET, ADS7854IRTET offers +2 bits of resolution and +15 dB SNR at identical throughput, while ADS8354IRTET trades 300 kSPS for +4 bits and +20 dB SNR - enabling selection based on whether speed, precision, or dynamic range dominates the system requirement.

Availability

ADS7254IRTET is available at Aetrix Electronics and suitable for motor control, power quality measurement, and protection relay applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS7254IRTET 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 high-performance data converters and industrial-grade signal chain solutions.

The ADSxx54 family-including ADS7254IRTET-is designed specifically for industrial motor control, power electronics, and protection systems demanding simultaneous dual-channel sampling, robust EMC performance, and extended temperature operation.

FAQ

What is the maximum sampling rate of the ADS7254IRTET?

The ADS7254IRTET achieves a maximum sampling rate of 1 MSPS in both 16-clock and 32-clock interface modes. This throughput is fully specified across the –40°C to +125°C operating range with AVDD = 5 V and DVDD = 3.3 V, enabling real-time capture of fast transient events in motor control and power monitoring applications. The ADS7254IRTET maintains timing integrity without derating at temperature extremes.

Does the ADS7254IRTET support external reference inputs?

Yes, the ADS7254IRTET supports external reference inputs via REFIO_A and REFIO_B pins. Each channel can accept an external reference voltage between 2.4 V and AVDD (for ±VREF mode) or between 2.4 V and AVDD/2 (for ±2×VREF mode). When using external references, the internal 2.5-V reference is automatically disabled, and the device draws only 300 µA per reference input, minimizing system power overhead. This capability is explicitly confirmed in Section 7.8 of the SBAS556B datasheet.

What package type is used for the ADS7254IRTET?

The ADS7254IRTET uses a 16-pin WQFN package (RTE variant) measuring 3.00 mm × 3.00 mm with an exposed thermal pad. This compact, thermally enhanced package is pin-compatible with the TSSOP-16 (PW) variant of the ADSxx54 family, allowing layout reuse across resolution grades. TI recommends connecting the thermal pad directly to PCB ground for optimal thermal performance and noise immunity, as documented in the "Thermal Information" section of the datasheet.

How does the ADS7254IRTET handle simultaneous sampling across its two channels?

The ADS7254IRTET employs matched sample-and-hold circuits and tightly controlled internal timing to achieve true simultaneous sampling with <40 ps inter-channel aperture mismatch. Both ADC cores initiate conversion on the same clock edge, and their results are output sequentially via SDO_A and SDO_B. This architecture preserves phase relationships between sampled signals-critical for encoder quadrature decoding and three-phase power calculations-and is validated across temperature and supply variations per SBAS556B Section 7.8.

Is the ADS7254IRTET suitable for automotive under-hood applications?

Yes, the ADS7254IRTET is fully specified for operation from –40°C to +125°C and qualified per extended industrial standards, making it suitable for automotive under-hood applications such as electric power steering (EPS) motor current sensing and battery management system (BMS) cell voltage monitoring. Its dual differential inputs provide 70 dB CMRR up to 20 kHz, and its simultaneous sampling eliminates phase skew in torque estimation algorithms-both key requirements validated in TI's production-grade SBAS556B datasheet.