Texas Instruments ADS5294IPFP

Overview

ADS5294IPFP from Texas Instruments is an octal-channel, 14-bit, 80-MSPS analog-to-digital converter with integrated digital processing block, LVDS serial outputs, and internal/external reference support. It delivers 75.5-dBFS SNR at 5 MHz input and 84-dBc SFDR, operating at 1.8 V with 77 mW/channel power consumption. It targets high-channel-count, low-noise data acquisition in ultrasound imaging systems.

For engineers reviewing the ADS5294IPFP datasheet, ADS5294IPFP pinout, ADS5294IPFP application, or ADS5294IPFP equivalent, key selection criteria include its 8-channel 14-bit resolution at 80 MSPS, programmable FIR/IIR filtering, flexible LVDS output mapping (1- or 2-wire per channel), and HTQFP-80 package compatibility with ADS5292 for migration paths.

Technical Context

The ADS5294IPFP implements a CMOS-based sampling circuit with differential analog inputs across eight channels, each supporting up to 2 V_PP input range and 0.95-V common-mode voltage. Its digital processing block includes programmable decimation filters (by 2/4/8), IIR high-pass filtering for DC offset suppression, and 0–12 dB digital gain - all configurable via SPI interface.

LVDS serialization supports two modes: 1-wire (14×) at up to 700 Mbps or 2-wire (7×) at up to 560 Mbps, with independent frame (ACLKP/ACLKN) and bit (LCLKP/LCLKN) clocks. The device uses separate analog (AVDD/AGND) and digital (LVDD/LGND) supplies and integrates a trimmed internal reference (1.45 V/0.45 V on REFT/REFB) for optimal SNR performance.

Key Specifications

Pinout & Package

ADS5294IPFP is housed in an HTQFP-80 package (12 mm × 12 mm) with exposed thermal pad (tied to AGND). Pin functions are validated per TI SLAS776E Rev E datasheet, including dual-supply separation (AVDD/LVDD), differential clock (CLKP/CLKN), eight differential analog inputs (IN1P/IN1N through IN8P/IN8N), and dual LVDS output pairs per channel (OUTxA_P/OUTxA_N and OUTxB_P/OUTxB_N).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal-channel ADC applications.

Compared with ADS5294IPFP, ADS5292IPFP offers lower power and cost at the expense of 5.5 dB SNR and 2-bit resolution, while ADS5295IPFP trades resolution for 25% higher sample rate and increased power - making ADS5294IPFP the optimal balance for high-SNR, 80-MSPS, 8-channel systems.

Availability

ADS5294IPFP is available at Aetrix Electronics and suitable for ultrasound imaging systems, multi-channel data acquisition platforms, and communications baseband receivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS5294IPFP 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 data converters, power management, and signal chain solutions.

The ADS5294IPFP belongs to TI's high-performance, low-power octal ADC product line designed specifically for medical ultrasound, sonar, and instrumentation applications demanding high channel density, excellent SNR, and flexible digital processing.

FAQ

What is the maximum input frequency supported by the ADS5294IPFP?

The ADS5294IPFP supports analog input frequencies up to 80 MHz at 2-VPP amplitude, as specified under recommended operating conditions. This corresponds to the Nyquist limit for its 80-MSPS maximum sample rate. Performance metrics such as SNR and SFDR are characterized at 5 MHz, but the device maintains functional linearity and overload recovery across the full 0–40 MHz baseband range.

Does the ADS5294IPFP require external reference components when using internal reference mode?

No, the ADS5294IPFP does not require external reference components in internal reference mode. The device outputs precisely trimmed 1.45 V (REFT) and 0.45 V (REFB) reference voltages, and the VCM pin provides a stable 0.95-V common-mode level. TI specifies that no decoupling capacitors are needed on REFT or REFB in this mode, simplifying layout and reducing BOM count.

How does the programmable LVDS output mapping benefit PCB design for the ADS5294IPFP?

The programmable LVDS output mapping in the ADS5294IPFP allows engineers to assign any ADC channel to any physical LVDS output pair (e.g., OUT1A_P/N, OUT3B_P/N) via register configuration. This eliminates fixed routing constraints, reduces layer count by avoiding trace crossovers, and enables optimal FPGA pin assignment - particularly valuable in space-constrained ultrasound or instrumentation boards.

Can the ADS5294IPFP operate with a single-ended clock input?

Yes, the ADS5294IPFP supports single-ended clock operation: tie CLKN to AGND and drive CLKP with a CMOS signal (VIH >1.5 V, VIL <0.3 V) or AC-coupled sine wave (0.2–1.5 VPP). The device's clock input circuitry accommodates this configuration without performance degradation, though differential clocking is recommended for best jitter immunity and SNR.

What is the purpose of the SYNC input on the ADS5294IPFP, and when is it required?

The SYNC input on the ADS5294IPFP synchronizes sampling across multiple ADS5294IPFP devices or aligns ADC conversion cycles with external system events. It is required in multi-chip time-interleaved or beamformed systems (e.g., ultrasound transducer arrays) to ensure deterministic phase relationships between channels. When unused, TI recommends a ≤10-kΩ pulldown resistor to prevent floating input.