Texas Instruments ADS5546IRGZT

Overview

ADS5546IRGZT from Texas Instruments is a 14-bit, 190 MSPS analog-to-digital converter with DDR LVDS and parallel CMOS outputs, internal sample-and-hold, programmable gain up to 6 dB, and 73.2-dBFS SNR at 70-MHz IF. It operates from 3.3-V analog and digital supplies in a 48-pin QFN package and targets high-IF sampling in wireless infrastructure and radar systems.

For engineers reviewing the ADS5546IRGZT datasheet, ADS5546IRGZT pinout, ADS5546IRGZT application, or ADS5546IRGZT equivalent, this page delivers verified technical context, validated pin functions, confirmed AC/DC specifications, real-world use scenarios, and two rigorously cross-checked alternative parts for high-speed data acquisition design.

Technical Context

The ADS5546IRGZT implements a fully differential pipeline ADC architecture with integrated clock duty cycle stabilizer and low-jitter clock buffer, enabling stable 190-MSPS operation with 73.2-dBFS SNR at 70 MHz. Its dual-output interface supports either DDR LVDS (with programmable output clock edge alignment) or parallel CMOS, each with distinct timing margins and load requirements.

It features dual reference modes-internal (0.5 V to 2.5 V, no external decoupling required) and external-with programmable gain control that trades full-scale input range for improved SFDR at lower signal amplitudes. Power scaling modes reduce total dissipation to 100 mW in standby without performance loss.

Key Specifications

Pinout & Package

ADS5546IRGZT is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad. Pin functions are validated per TI SLWS183D datasheet Figures 1–3 and Tables 1–7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5546IRGZT, ADS5545IRGZT offers identical functionality at lower speed and power, while AD9246BCPZ-190 provides comparable speed but mandates external reference design effort and forfeits DDR LVDS capability - making ADS5546IRGZT optimal for compact, high-SFDR, dual-interface RF receiver designs.

Availability

ADS5546IRGZT is available at Aetrix Electronics and suitable for wireless infrastructure, radar signal processing, and medical ultrasound requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for ADS5546IRGZT 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 ADS5546IRGZT belongs to TI's high-speed precision ADC product line, engineered for demanding RF/IF digitization in wireless infrastructure, defense radar, and test instrumentation where SNR, SFDR, and interface flexibility are critical.

FAQ

What is the maximum analog input frequency supported by the ADS5546IRGZT?

The ADS5546IRGZT has an analog input bandwidth of 500 MHz (–3 dB), meaning it can accurately digitize signals up to approximately 500 MHz with minimal amplitude attenuation. This supports direct sampling of L-band and S-band RF signals in certain architectures, though its specified AC performance (e.g., SNR, SFDR) is optimized for IF frequencies up to 300 MHz per the datasheet test conditions.

Does the ADS5546IRGZT require external reference decoupling capacitors?

No, the ADS5546IRGZT does not require external reference decoupling capacitors when operating in internal reference mode. Its integrated reference (0.5 V to 2.5 V) eliminates the traditional REFB/REFT pins and associated bypass components, reducing BOM count and PCB area. External reference mode remains supported but requires proper decoupling per design guidelines.

How many bits of resolution does the ADS5546IRGZT provide, and is it guaranteed monotonic?

The ADS5546IRGZT provides true 14-bit resolution with no missing codes across its full operating range, as explicitly guaranteed in the datasheet. This ensures monotonicity and predictable code transitions, essential for closed-loop applications like power amplifier linearization and precision instrumentation where code ambiguity would degrade control accuracy.

Can the ADS5546IRGZT operate with a 1.8-V digital supply?

No, the ADS5546IRGZT requires 3.3-V supplies for both AVDD and DRVDD, with absolute maximum ratings of 3.9 V and recommended operating range of 3.0 V to 3.6 V. It is not compatible with 1.8-V I/O standards; interfacing with lower-voltage FPGAs or processors requires level-shifting or careful selection of compatible logic families.

What is the latency of the ADS5546IRGZT, and how is it affected by output mode?

The ADS5546IRGZT has a fixed latency of 14 clock cycles, independent of LVDS or CMOS output mode. This value is measured from the input clock zero-crossing to valid data appearing at the output pins and is consistent across all sampling rates and configurations, enabling deterministic timing in real-time signal processing pipelines.