Texas Instruments ADS5547IRGZT

Overview

ADS5547IRGZT from Texas Instruments is a 14-bit, 210 MSPS analog-to-digital converter with DDR LVDS and parallel CMOS outputs, internal sample-and-hold, 73.3-dBFS SNR at 70-MHz IF, and 85-dBc SFDR at 70-MHz IF with 0-dB gain. It operates from 3.3-V analog and digital supplies in industrial temperature range (–40°C to 85°C) and targets high-speed signal acquisition in wireless infrastructure and radar systems.

For engineers reviewing the ADS5547IRGZT datasheet, ADS5547IRGZT pinout, ADS5547IRGZT application, or ADS5547IRGZT equivalent, this page delivers verified technical context, real-world timing margins, confirmed output interface behavior, validated power modes, and precise package-level integration guidance for high-frequency sampling designs.

Technical Context

The ADS5547IRGZT implements a fully differential pipeline ADC architecture with integrated clock duty cycle stabilizer, programmable gain up to +6 dB, and dual-output flexibility-supporting either DDR LVDS (with 225–425 mV differential swing) or parallel CMOS (3.3-V logic). Its analog input bandwidth reaches 800 MHz, enabling direct RF sampling of IF signals up to 170 MHz while maintaining ≥71 dBFS SNR.

It features an internal reference (0.5 V to 2.5 V), eliminates external reference decoupling, and supports external reference mode with 1.45–1.55 V common-mode voltage. Output clock position is programmable in 1/12-Ts steps to optimize setup/hold timing margins-critical for reliable capture in FPGA-based receivers operating at 210 MSPS.

Key Specifications

Pinout & Package

The ADS5547IRGZT is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad, θ_JA = 25.41°C/W (0 LFM), requiring soldered thermal pad for thermal compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5547IRGZT, ADS5546IRGZT offers drop-in compatibility at lower speed and power, while AD9446BSTZ-200 trades interface flexibility and RF-optimized specs for raw resolution-making ADS5547IRGZT the preferred choice for software-defined wireless and radar front-ends requiring balanced speed, spurious performance, and configurability.

Availability

ADS5547IRGZT is available at Aetrix Electronics and suitable for wireless infrastructure, radar signal processing, and test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature-grade performance.

Supply support for ADS5547IRGZT 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 ADS5547IRGZT belongs to TI's high-speed ADC product line, engineered specifically for demanding RF sampling applications-including wireless infrastructure, radar, and instrumentation-where simultaneous high resolution, wide bandwidth, and low power are essential.

FAQ

What is the maximum analog input frequency supported by the ADS5547IRGZT?

The ADS5547IRGZT specifies an analog input bandwidth of 800 MHz, enabling reliable digitization of differential signals up to 170 MHz IF while maintaining ≥71 dBFS SNR. This bandwidth supports direct sampling of first-IF stages in wireless and radar systems without requiring image-reject filtering prior to the ADC input.

Does the ADS5547IRGZT require external reference decoupling capacitors?

No-the ADS5547IRGZT integrates an internal reference (0.5 V to 2.5 V) and explicitly eliminates the need for external reference decoupling. This simplifies layout and improves noise immunity in high-density RF boards, as confirmed in the device's datasheet section "No External Reference Decoupling Required."

Can the ADS5547IRGZT operate with a 1.5-VPP differential input clock?

Yes-the ADS5547IRGZT supports differential input clock amplitudes from 400 mVPP up to 1.5 VPP (sine wave, ac-coupled), as specified in the Recommended Operating Conditions table. This allows direct interfacing with low-voltage clock generators or attenuated LO signals without external level-shifting circuitry.

What is the latency of the ADS5547IRGZT in DDR LVDS mode?

The ADS5547IRGZT exhibits a fixed latency of 14 clock cycles in DDR LVDS mode, as measured from input clock rising edge zero-cross to valid data at the LVDS output pairs. This deterministic latency enables precise synchronization in FPGA-based digital downconverters and real-time signal processing pipelines.

How does the programmable gain feature improve SFDR performance in the ADS5547IRGZT?

The ADS5547IRGZT's programmable gain (up to +6 dB) increases effective input sensitivity at lower full-scale ranges, reducing quantization noise contribution relative to distortion products-thereby improving SFDR by up to 3–5 dBc at 70 MHz IF when gain is applied, as verified in AC characteristics tables.

Is the ADS5547IRGZT pin-compatible with other devices in the ADS554x family?

Yes-the ADS5547IRGZT shares the same 48-pin QFN (RGZ) package and pinout with ADS5546IRGZT and ADS5545IRGZT, enabling hardware reuse across 210/190/170 MSPS variants. However, register maps and timing parameters differ, so firmware must be validated per speed grade.