Texas Instruments ADS5525IRGZT

Overview

ADS5525IRGZT from Texas Instruments is a 12-bit, 170 MSPS analog-to-digital converter with DDR LVDS and parallel CMOS outputs, internal sample-and-hold, programmable gain up to 6 dB, and 70.5-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 wireless infrastructure signal acquisition.

For engineers reviewing the ADS5525IRGZT datasheet, ADS5525IRGZT pinout, ADS5525IRGZT application, or ADS5525IRGZT equivalent, this page delivers verified specifications including SNR/SFDR performance at 70 MHz, LVDS/CMOS output flexibility, clock duty cycle stabilization, internal reference architecture, and programmable output clock positioning for timing margin optimization.

Technical Context

The ADS5525IRGZT employs a fully differential pipeline ADC architecture with integrated sample-and-hold and low-jitter clock buffer to achieve 70.5-dBFS SNR and 84-dBc SFDR at 70-MHz input frequency. Its dual-output interface supports DDR LVDS (with internal 100-Ω termination option) or 12-bit parallel CMOS, both configurable via pin-strapping or serial interface.

Programmable features include output clock edge position (±1/12 Ts alignment), gain control (0–6 dB), low-speed mode (1–60 MSPS), and reference selection (internal 2.5-V/0.5-V or external). The device uses a single 3.3-V supply for analog and digital domains and eliminates external reference decoupling via integrated reference regulation.

Key Specifications

Pinout & Package

ADS5525IRGZT is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad. Pin functions are validated per TI SLWS191B datasheet Figures 1–3 and Tables 3–7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5525IRGZT, ADS5500IRGZT trades speed for resolution and lacks DDR LVDS, while AD9233BCPZ-170 replaces parallel interfaces with JESD204B-requiring protocol-aware FPGA design but reducing I/O count by ~40%.

Availability

ADS5525IRGZT is available at Aetrix Electronics and suitable for wireless infrastructure, software-defined radio, and radar systems requiring stable component supply, long-term obsolescence management, and guaranteed traceability.

Supply support for ADS5525IRGZT 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, communications, and automotive markets.

The ADS5525IRGZT belongs to TI's high-speed ADC portfolio designed specifically for demanding IF sampling in wireless infrastructure and defense electronics-emphasizing SNR/SFDR at high input frequencies and flexible digital interfacing.

FAQ

What is the maximum input frequency supported by the ADS5525IRGZT?

The ADS5525IRGZT has an analog input bandwidth of 500 MHz (–3 dB) and is characterized for AC performance up to 300 MHz input frequency. At 70 MHz, it delivers 70.5-dBFS SNR and 84-dBc SFDR-making it suitable for high-IF sampling in wireless infrastructure. Performance degrades gradually beyond 100 MHz due to aperture jitter and front-end roll-off, but usable signals can be acquired up to Nyquist (85 MHz at 170 MSPS) with verified ENOB ≥11 bits.

Does the ADS5525IRGZT require external reference decoupling capacitors?

No, the ADS5525IRGZT does not require external reference decoupling capacitors. Its internal reference architecture (2.5 V top / 0.5 V bottom) integrates regulation and filtering, eliminating the need for traditional 10-µF bypass caps on REFT/REFB pins. This reduces PCB area and BOM count. External reference mode remains supported, but only when using a low-noise, well-decoupled external source.

How is output clock positioning controlled on the ADS5525IRGZT?

Output clock positioning on the ADS5525IRGZT is controlled via the SEN pin (parallel mode) or Register 0x62 (serial mode). In LVDS mode, SEN voltage selects among four positions: default alignment, or ±1/12 Ts shift. In CMOS mode, it shifts CLKOUT rising edge later by 1/12, 2/12, or 3/12 of the sampling period. This programmability directly adjusts setup/hold margins for FPGA capture logic without changing PCB layout.

Can the ADS5525IRGZT operate at sampling rates below 50 MSPS?

Yes, the ADS5525IRGZT supports low-speed operation from 1 MSPS to 60 MSPS using its LOW SPEED mode, enabled by setting SCLK = DRVDD. In this mode, power consumption scales down-total dissipation drops to ~100–150 mW in STANDBY-while maintaining full 12-bit resolution and no missing codes. Timing parameters (e.g., setup/hold) are recalculated per the datasheet's Output Timing section for accurate FPGA interface design.

What are the key differences between DDR LVDS and parallel CMOS output modes on the ADS5525IRGZT?

DDR LVDS uses six differential pairs (D0_D1_P/M through D10_D11_P/M) to transmit 12 bits on both clock edges, reducing pin count and EMI while requiring matched-length traces and 100-Ω termination. Parallel CMOS uses 12 single-ended outputs (D0–D11) with 3.3-V logic levels, simplifying FPGA connection but consuming more I/O and increasing switching noise. Mode selection is controlled by the DFS pin voltage or Register 0x6C.