Texas Instruments ADS7854IPW

Overview

ADS7854IPW from Texas Instruments is a dual, simultaneous-sampling, 14-bit analog-to-digital converter (ADC) with fully differential inputs, 1 MSPS throughput, ±1.5 LSB max INL, 88 dB SNR, and operation over –40°C to +125°C. It serves as the high-speed data acquisition core in motor position feedback loops and three-phase power control systems.

For engineers reviewing the ADS7854IPW datasheet, ADS7854IPW pinout, ADS7854IPW application, or ADS7854IPW equivalent, this page delivers verified electrical specs, TSSOP-16 pin mapping, real-world use cases in protection relays and optical networking gain control, and two validated alternative parts for design flexibility.

Technical Context

The ADS7854IPW integrates two independent ADC cores sharing a common serial interface, enabling true simultaneous sampling of two fully differential analog channels (AINP_A/AINM_A and AINP_B/AINM_B). Its internal 2.5-V reference is buffered and programmable per channel, supporting system-level gain calibration without external components.

It supports both 16-clock and 32-clock serial interface modes, with configurable power modes (normal, standby, power-down) to optimize current draw-7.5 mA at 1 MSPS with internal reference, dropping to 1 µA in power-down. All timing and DC/AC performance is fully specified across the extended industrial temperature range.

Key Specifications

Pinout & Package

TSSOP-16 package (5.00 mm × 4.40 mm), thermally enhanced with exposed pad (not electrically connected); compatible with standard reflow profiles and IPC-7351B land pattern PW.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7854IPW, ADS8354IPW trades 300 kSPS for 2 extra bits and 5 dB SNR-ideal for metrology-grade systems-while ADS7254IPW retains full speed at 12-bit resolution for simpler control loops where quantization noise is less critical.

Availability

ADS7854IPW is available at Aetrix Electronics and suitable for motor control, optical networking, and protection relay applications requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing.

Supply support for ADS7854IPW 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 chains.

The ADSxx54 family-including ADS7854IPW-is designed specifically for high-reliability, simultaneous-sampling applications in motor drives, power quality meters, and optical infrastructure where channel-to-channel timing integrity is non-negotiable.

FAQ

What is the maximum sampling rate of the ADS7854IPW?

The ADS7854IPW achieves a maximum throughput of 1 million samples per second (1 MSPS) in both 16-clock and 32-clock serial interface modes. This rate is fully supported across the entire operating temperature range (–40°C to +125°C) with AVDD = 5 V and DVDD = 3.3 V, making ADS7854IPW suitable for demanding real-time control loops where deterministic latency is critical.

Does the ADS7854IPW require an external reference voltage?

No-the ADS7854IPW includes an integrated, buffered 2.5-V reference with ±1 mV matching between channels and ±10 ppm/°C drift. REFIO_A and REFIO_B can operate as outputs (default) or accept external references (2.4 V to AVDD). Using the internal reference eliminates BOM cost and layout complexity while maintaining channel matching essential for differential measurements in ADS7854IPW systems.

How does the ADS7854IPW handle simultaneous sampling of two channels?

The ADS7854IPW uses a shared sample-and-hold architecture with independent conversion paths, guaranteeing true simultaneous sampling with <40 ps inter-channel aperture jitter match. Both channels acquire their analog inputs at the exact same instant-critical for vector math in motor control-and output results via dedicated SDO_A and SDO_B pins to avoid serialization delay. This architecture is intrinsic to ADS7854IPW's dual-core design.

What package options are available for the ADS7854IPW?

The ADS7854IPW is offered exclusively in the TSSOP-16 (PW) package: 5.00 mm × 4.40 mm body size with 0.65-mm lead pitch. It is pin-compatible with the WQFN-16 (RTE) variant of the ADSxx54 family but is not available in WQFN. The TSSOP-16 footprint supports standard automated assembly and provides adequate thermal dissipation (θ_JA = 86.9°C/W) for most industrial applications without heatsinking.

Can the ADS7854IPW operate with different analog and digital supply voltages?

Yes-ADS7854IPW supports independent supply domains: AVDD = 4.5 V to 5.5 V (analog core and internal reference) and DVDD = 1.65 V to 5.5 V (digital I/O). This allows interfacing with 1.8-V, 3.3-V, or 5-V microcontrollers while maintaining optimal analog performance. Ground separation (GND vs. REFGND_A/B) and proper decoupling per the ADS7854IPW datasheet are mandatory to preserve 88 dB SNR.