Texas Instruments ADS5474IPFP

Overview

ADS5474IPFP from Texas Instruments is a 14-bit, 400-MSPS analog-to-digital converter with 1.4-GHz input bandwidth, 69.8-dBFS SNR at 230 MHz, and LVDS-compatible outputs. It operates from dual supplies (5 V AVDD5 and 3.3 V DVDD3/AVDD3), integrates on-chip track-and-hold and reference circuitry, and targets high-speed data acquisition in radar and software-defined radio systems.

For engineers reviewing the ADS5474IPFP datasheet, ADS5474IPFP pinout, ADS5474IPFP application, or ADS5474IPFP equivalent, key selection considerations include its 400-MSPS sample rate, 11.2-bit ENOB at 70 MHz, differential 2.2-VPP input range, LVDS output timing alignment (data transitions on both edges of half-rate clock), and HTQFP-80 PowerPAD thermal performance.

Technical Context

The ADS5474IPFP employs a BiCom3 bipolar process and features an integrated analog input buffer isolating the track-and-hold stage from source impedance effects. Its architecture supports DC-coupled operation via the VCM pin (3.1 V nominal) and accepts differential sinusoidal clocks up to 404 MSPS with 0.5–5 VPP amplitude.

Digital outputs use LVDS signaling with guaranteed 247–454 mV differential swing and 1.125–1.375 V common-mode voltage. Latency is fixed at 3.5 clock cycles, and timing parameters-including tDATA (800–2000 ps) and tDRY (1000–1800 ps)-are specified under 10-pF parasitic loading conditions.

Key Specifications

Pinout & Package

The ADS5474IPFP is housed in an 80-pin HTQFP PowerPAD package (12 mm × 12 mm body, 14 mm × 14 mm footprint) with exposed thermal pad connected to AGND. The PowerPAD provides primary thermal conduction path to PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with ADS5463IPFP and ADS54J60IRGC, the ADS5474IPFP delivers optimal balance of 14-bit resolution, LVDS parallel interface simplicity, and industrial-temperature reliability-making it ideal for legacy and new designs where pin compatibility and analog performance are prioritized over serial interface or ultra-low power.

Availability

ADS5474IPFP is available at Aetrix Electronics and suitable for test and measurement instrumentation, software-defined radio development, and radar system prototyping requiring stable component supply and long-term industrial-grade availability.

Supply support for ADS5474IPFP 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 high-performance data converters for industrial, automotive, and communications markets.

The ADS5474IPFP belongs to TI's high-speed ADC portfolio designed for wideband signal acquisition in demanding RF and instrumentation applications, emphasizing analog fidelity, thermal robustness, and system-level integration ease.

FAQ

What is the maximum clock frequency supported by the ADS5474IPFP?

The ADS5474IPFP supports a maximum sample rate of 404 MSPS per the latest revision of its datasheet (SLAS525D, December 2017). This applies to sine-wave clock inputs meeting the specified 0.5–5 VPP amplitude and 40–60% duty cycle requirements. At 400 MSPS, the device achieves its rated 69.8-dBFS SNR and 80-dBc SFDR performance at 230 MHz input frequency. Operation above 400 MSPS may reduce AC performance margins and is not guaranteed across temperature.

Does the ADS5474IPFP require an external reference voltage?

No, the ADS5474IPFP includes an internal 2.4-V reference (VREF) and a buffered 3.1-V common-mode output (VCM) for DC-coupled applications. External reference is optional: VREF can be overdriven if higher accuracy or temperature stability is required, but the internal reference suffices for most SDR and instrumentation uses. A 0.1-μF capacitor from VREF to AGND is recommended for noise suppression, and VCM must be decoupled similarly when used.

How does the power-down mode function on the ADS5474IPFP?

The ADS5474IPFP enters 50-mW power-down mode when the PWD pin (pin 33) is driven logic HIGH. Wake-up time is 5 μs after PWD returns LOW, and the device resumes full operation with valid data within 3.5 clock cycles plus propagation delay. During power-down, analog and digital supplies remain active, but the track-and-hold and core ADC circuitry are disabled. PWD is not used on pin-compatible family members (ADS5440/ADS5444/ADS5463), making it a unique control feature of the ADS5474IPFP.

What thermal design considerations apply to the ADS5474IPFP package?

The ADS5474IPFP uses an HTQFP-80 PowerPAD package with RθJB = 9.8 °C/W, meaning junction-to-board thermal resistance is optimized through the exposed thermal pad soldered to a dedicated AGND copper plane. To maintain ≤125°C junction temperature at 2.5 W dissipation, ≥4 cm² of 2-oz copper with ≥6 thermal vias (0.3-mm diameter) under the pad is recommended. RθJA = 25.9 °C/W assumes standard JEDEC test board; actual system-level thermal performance depends on PCB stack-up and airflow.

Is the ADS5474IPFP pin-compatible with other devices in its family?

Yes, the ADS5474IPFP is pin-similar and pin-compatible with the ADS5463IPFP (12-bit), ADS5440IPFP, and ADS5444IPFP (13-bit) - all share identical HTQFP-80 PowerPAD packaging, pin functions, and footprint. This enables direct hardware substitution across resolution grades without PCB redesign. However, functional differences exist: VCM and PWD pins are unique to ADS5474IPFP and float on other family members; unused pins (e.g., NC 4, 5, 43–46) must remain unconnected per datasheet guidance.