Texas Instruments ADS5484IRGCR

Overview

ADS5484IRGCR from Texas Instruments is a 16-bit, 170-MSPS analog-to-digital converter with on-chip high-impedance analog buffer, 78 dBFS noise floor, 95 dBc SFDR at 30 MHz input, and LVDS-compatible DDR outputs. It operates from dual supplies (5 V and 3.3 V) and targets high-fidelity signal acquisition in wireless infrastructure baseband receivers.

For engineers reviewing the ADS5484IRGCR datasheet, ADS5484IRGCR pinout, ADS5484IRGCR application, or ADS5484IRGCR equivalent, key selection considerations include its 170-MSPS sampling rate, dither-enabled SFDR improvement, QFN-64 PowerPAD package thermal performance, industrial temperature range (–40°C to 85°C), and pin compatibility with ADS5483/5482/5481 family members.

Technical Context

The ADS5484IRGCR implements a track-and-hold architecture with integrated analog input buffer isolating source impedance from internal switching transients. Its dual-supply design separates 5-V analog core (AVDD5) and 3.3-V analog/digital domains (AVDD3/DVDD3), enabling optimized noise isolation and power efficiency.

Internal reference generation (1.2 V nominal) and programmable VCM output (3.1 V) support flexible analog interface design. Dither control (via DITHER pin) improves SFDR by randomizing quantization error, while PDWNF/PDWNS pins enable light-sleep (600 µs wake-up) and deep-sleep (6 ms wake-up) modes for dynamic power management.

Key Specifications

Pinout & Package

ADS5484IRGCR is housed in a QFN-64 PowerPAD™ package (9 mm × 9 mm footprint) with exposed thermal pad (Pin 65 = AGND) for enhanced heat dissipation. The package supports soldered thermal vias and achieves RθJA = 20°C/W (no airflow) per TI thermal characterization.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5485IRGCR and ADS5483IRGCR, the ADS5484IRGCR delivers optimal balance of 170-MSPS throughput, 95 dBc SFDR, and thermal efficiency in the ADS548x family-making it ideal for next-generation wireless infrastructure requiring proven performance without over-spec'ing sample rate.

Availability

ADS5484IRGCR is available at Aetrix Electronics and suitable for wireless infrastructure baseband receivers, test and measurement digitizers, and software-defined radio platforms requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS5484IRGCR 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 ADS548x product line was designed for high-dynamic-range, wideband digitization in demanding RF and IF receiver chains-emphasizing SFDR, SNR, and thermal robustness in compact QFN packages.

FAQ

What is the maximum sampling rate supported by the ADS5484IRGCR?

The ADS5484IRGCR supports a maximum sampling rate of 170 MSPS. This is confirmed in the Electrical Characteristics table and timing specifications of the SLAS610C datasheet. At this rate, the device maintains 16-bit resolution, 75.9 dBFS SNR at 30 MHz input, and 95 dBc SFDR. The clock input must be a 3-VPP differential sine wave with 45–55% duty cycle to ensure reliable operation at full speed.

Does the ADS5484IRGCR require an external reference voltage?

No, the ADS5484IRGCR includes an internal 1.2-V reference generator and does not require an external reference. The REF pin can be used as an input if an external reference is preferred, but doing so requires pulling both PDWNF and PDWNS high to disable the internal reference. For most applications, the internal reference is sufficient and simplifies system design, as confirmed in the Functional Description and Pin Functions sections of the ADS5484IRGCR datasheet.

How does dither improve performance in the ADS5484IRGCR?

Dither in the ADS5484IRGCR improves SFDR by injecting controlled noise to randomize quantization error, thereby reducing deterministic harmonics and spurs. When enabled via the DITHER pin, SFDR increases by up to 10 dB at mid-band frequencies (e.g., 70–130 MHz), as shown in Figures G001 and G009. This is especially valuable in multi-tone environments like LTE/5G base stations where spur suppression directly impacts adjacent-channel leakage ratio (ACLR).

What are the power-down modes available on the ADS5484IRGCR?

The ADS5484IRGCR offers two hardware-controlled power-down modes: light sleep (enabled by asserting PDWNF high) consumes 680 mW and wakes in 600 µs; deep sleep (enabled by asserting PDWNS high) consumes 100 mW and wakes in 6 ms. Both modes retain register state. These modes are validated in the Electrical Characteristics table under POWER SUPPLY section and support dynamic power scaling in burst-mode or time-division systems.

Is the ADS5484IRGCR pin-compatible with other devices in the ADS548x family?

Yes, the ADS5484IRGCR is pin-for-pin compatible with ADS5483IRGCR, ADS5482IRGCR, and ADS5481IRGCR per the datasheet's Feature list and Package/Ordering Information table. All share the QFN-64 RGC package, identical pin functions (e.g., INP/INM, CLKP/CLKM, DRY_P/M), and compatible power/signal routing. This allows seamless migration across 80–200 MSPS sample rates without PCB redesign.