Texas Instruments ADS5424IPJY

Overview

ADS5424IPJY from Texas Instruments is a 14-bit, 105 MSPS analog-to-digital converter (ADC) designed for high-performance IF sampling in communication receivers. It features 74 dBc SNR and 93 dBc SFDR at 50 MHz input frequency, operates from 5 V analog and 3.3 V digital supplies, and delivers CMOS-compatible parallel outputs in two's complement format. Its on-chip analog buffer, track-and-hold, and internal 2.4 V reference simplify system design in base station infrastructure.

For engineers reviewing the ADS5424IPJY datasheet, ADS5424IPJY pinout, ADS5424IPJY application, or ADS5424IPJY equivalent, key selection considerations include its 2.2 Vpp differential input range, industrial temperature rating (−40°C to 85°C), 52-pin HTQFP package with exposed heatsink, latency of 3 clock cycles, and pin compatibility with AD6645 for drop-in replacement in existing designs.

Technical Context

The ADS5424IPJY implements a monolithic pipeline architecture using Texas Instruments' BiCom3 bipolar process, where both rising and falling clock edges advance samples through successive resolution stages. Conversion is initiated on the rising edge of the differential clock, and digital error correction logic combines stage outputs to achieve 14-bit accuracy without missing codes.

Its analog front-end includes a differential input buffer isolating the signal source from internal switching noise, a 1 kΩ differential input impedance, and an internally generated 2.4 V reference that sets the common-mode voltage and enables full-scale 2.2 Vpp differential swing. The device supports dc-coupled operation when paired with differential amplifiers like THS4509.

Key Specifications

Pinout & Package

The ADS5424IPJY is housed in a 52-pin HTQFP package (PJY suffix) with an exposed thermal pad (PowerPad™) for enhanced heat dissipation. Package dimensions are 10 mm × 10 mm × 1.0 mm, and the exposed pad must be soldered to PCB ground plane via ≥25 thermal vias (5×5 array) per TI thermal guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD6645ASVZ-105, the ADS5424IPJY reduces system BOM by integrating reference and buffer functions, while ADS5463IPFP trades power efficiency and package size for raw resolution-making ADS5424IPJY optimal for cost- and thermally constrained IF sampling where 14-bit fidelity suffices.

Availability

ADS5424IPJY is available at Aetrix Electronics and suitable for base station infrastructure, instrumentation digitizers, video signal acquisition systems, and digital oscilloscope front-ends requiring stable component supply across extended product lifecycles.

Supply support for ADS5424IPJY 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 ADS5424IPJY belongs to TI's high-speed ADC portfolio targeting IF sampling in wireless infrastructure; it was engineered to deliver best-in-class SFDR and SNR at 105 MSPS while minimizing external component count and thermal footprint.

FAQ

What is the absolute maximum clock voltage rating for ADS5424IPJY?

The ADS5424IPJY specifies an absolute maximum differential clock voltage of ±2.5 V across CLK and CLK pins. Exceeding this rating risks permanent damage to the internal clock buffer. Recommended operating conditions specify a 3 Vpp sine-wave differential clock amplitude, with common-mode voltage centered at AVDD/2 (2.5 V). Always observe the 50% duty cycle requirement to maintain aperture jitter below 150 fs.

Does ADS5424IPJY support dc-coupled analog inputs?

Yes, ADS5424IPJY supports dc-coupled analog inputs when used with a differential amplifier such as THS4509 configured to set the input common-mode voltage to 2.4 V. The internal reference and input buffer allow direct connection without ac-coupling capacitors. However, input common-mode range must remain within AVDD − 0.3 V to AVDD + 0.3 V (4.7 V to 5.3 V), and differential swing must not exceed 2.2 Vpp to avoid overrange (OVR) assertion.

How is the 3-cycle latency of ADS5424IPJY implemented in the pipeline architecture?

The ADS5424IPJY achieves 3-cycle latency through a synchronous pipeline structure where each half-clock cycle advances the sample through one stage. Rising and falling edges of the 105 MSPS clock drive successive stages, resulting in deterministic output timing: data sampled at clock edge N appears on D[0:13] at edge N+3. This fixed latency enables precise synchronization with FPGA-based digital downconverters and eliminates variable delay compensation logic.

What thermal vias configuration is required for the ADS5424IPJY's exposed PowerPad?

The ADS5424IPJY's exposed thermal pad requires ≥25 thermal vias arranged in a 5×5 array, each with diameter ≥0.3 mm and filled or plated-through, connecting the pad directly to an internal or bottom-layer solid ground plane. TI's datasheet specifies θJC = 2°C/W under this condition. Insufficient via count increases junction-to-case thermal resistance, risking thermal shutdown or accelerated parameter drift above 70°C ambient.

Can ADS5424IPJY be used with 2.5 V digital supplies instead of 3.3 V?

No, ADS5424IPJY requires DRVDD = 3.0–3.6 V for guaranteed CMOS-compatible output levels (VOH ≥ 2.6 V, VOL ≤ 0.6 V). Operating DRVDD at 2.5 V violates the recommended conditions and results in marginal VOH (potentially <2.0 V), increasing setup/hold timing violations in downstream logic. The device's digital I/O is not 2.5 V tolerant; use level translators if interfacing with 2.5 V systems.