Texas Instruments ADC32J25IRGZT

Overview

ADC32J25IRGZT from Texas Instruments is a dual-channel, 12-bit, 160-MSPS analog-to-digital converter with JESD204B subclass 0/1/2 serial interface, 70.3 dBFS SNR at 70 MHz input, 88 dBc SFDR, and ultralow 454 mW total power consumption. It serves as the front-end digitizer in high-frequency RF receivers requiring precise multichip synchronization via SYSREF and deterministic latency.

For engineers reviewing the ADC32J25IRGZT datasheet, ADC32J25IRGZT pinout, ADC32J25IRGZT application, or ADC32J25IRGZT equivalent, key selection criteria include JESD204B lane count (1 per channel), 160-MSPS sampling rate capability, VQFN-48 thermal performance (RθJB = 3.0°C/W), and dither-enabled SNR optimization for wideband signal capture in SDR and radar systems.

Technical Context

The ADC32J25IRGZT integrates two independent 12-bit ADC cores sharing a single 1.8-V analog supply (AVDD) and digital supply (DVDD), with internal PLL multiplying the input clock by 20 to generate the 3.2-Gbps JESD204B bit clock. Its architecture supports multichip synchronization through differential SYSREFP/SYSREFM inputs and JESD204B SYNC~ signals, enabling coherent sampling across distributed receiver arrays.

It employs internal dither to improve SFDR and noise floor flatness, features flexible clock division (÷1/÷2/÷4), and delivers 105 dB channel isolation up to 300 MHz - critical for quadrature I/Q sampling and diversity radio architectures where crosstalk must be suppressed below –100 dB.

Key Specifications

Pinout & Package

VQFN-48 (7 mm × 7 mm) package with exposed thermal pad on backside; optimized for low-inductance grounding and efficient heat dissipation in RF signal chains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, JESD204B ADC applications.

Compared with ADC32J24IRGZT and ADC32J45IRGZT, the ADC32J25IRGZT uniquely balances 160-MSPS throughput, 70.3 dBFS SNR, and 454 mW power in a thermally optimized VQFN-48 - making it optimal for size-constrained, wideband SDR and radar front-ends where both speed and efficiency are critical.

Availability

ADC32J25IRGZT is available at Aetrix Electronics and suitable for multi-carrier cellular base stations, radar signal processing, software-defined radios, and communications test equipment requiring stable component supply and long-term production continuity.

Supply support for ADC32J25IRGZT 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 and embedded processing technologies, with decades of expertise in high-performance data converters and RF signal chain solutions.

The ADC32J2x family was designed for demanding communications infrastructure and defense applications requiring high linearity, ultralow power, and deterministic JESD204B synchronization - targeting direct RF sampling in SDR, radar, and 5G systems.

FAQ

What is the maximum sampling rate supported by the ADC32J25IRGZT?

The ADC32J25IRGZT supports a maximum sampling rate of 160 MSPS, verified in the datasheet's Section 7.7 and confirmed by AC performance tables for ADC32J25 at fS = 160 MSPS. This rate enables Nyquist bandwidth up to 80 MHz and is achievable with the internal PLL configured for 20× multiplication of the input clock. The ADC32J25IRGZT maintains specified SNR (70.3 dBFS) and SFDR (88 dBc) at this full rate with dither enabled.

Does the ADC32J25IRGZT support multichip synchronization, and how is it implemented?

Yes, the ADC32J25IRGZT supports multichip synchronization via differential SYSREFP/SYSREFM inputs and JESD204B SYNCM~/SYNCP~ signals. SYSREF provides a common timing reference for aligning sample clocks across multiple devices, while SYNC~ initiates JESD204B link initialization sequences (CGS and ILA). Timing diagrams in Section 8.1 and functional description in Section 9.4 confirm deterministic latency alignment with sub-cycle precision, essential for phased-array radar and massive MIMO systems.

What package type and thermal characteristics does the ADC32J25IRGZT use?

The ADC32J25IRGZT uses a VQFN-48 (7 mm × 7 mm) package with an exposed thermal pad on the backside. Its thermal metrics include RθJB = 3.0°C/W (junction-to-board) and RθJA = 25.7°C/W (junction-to-ambient), as specified in Section 7.4. This package enables efficient heat transfer to the PCB, supporting reliable operation at full 454 mW power dissipation in compact RF modules without forced airflow.

Can the ADC32J25IRGZT operate with a single 1.8-V supply, and what are the supply current requirements?

Yes, the ADC32J25IRGZT operates from a single 1.8-V analog supply (AVDD) and a separate 1.8-V digital supply (DVDD), both within 1.7–1.9 V range per Section 7.3. At 160 MSPS, typical analog supply current is 302 mA and digital supply current is 80 mA, totaling 454 mW. These values are confirmed in Section 7.7's Electrical Characteristics table for ADC32J25 and validated by thermal design guidelines in Section 11.

What JESD204B subclass and lane configuration does the ADC32J25IRGZT support?

The ADC32J25IRGZT supports JESD204B subclasses 0, 1, and 2 at speeds up to 3.2 Gbps, with one lane per ADC channel (two lanes total) as stated in Section 1 Features and Section 9.3. Each lane carries serialized 12-bit data from its respective channel using CML output drivers with 0.4 V differential swing. Subclass 1 operation enables deterministic latency required for synchronized multichip systems, and lane configuration is fixed - no programmable lane aggregation.