Texas Instruments ADS5444IPFP

Overview

ADS5444IPFP from Texas Instruments is a 13-bit, 250 MSPS analog-to-digital converter (ADC) with fully buffered differential inputs, LVDS-compatible digital outputs, and an internal 2.4 V reference. It operates from a 5 V analog supply and 3.3 V output driver supply, delivering 69 dBc SNR at 100 MHz IF and 76 dBc SFDR-optimized for high-frequency receiver front-ends in wireless infrastructure.

For engineers reviewing the ADS5444IPFP datasheet, ADS5444IPFP pinout, ADS5444IPFP application, or ADS5444IPFP equivalent, key selection criteria include its 800 MHz analog input bandwidth, 4-cycle latency, 2.2 VPP differential input range, industrial temperature rating (–40°C to 85°C), and TQFP-80 PowerPAD™ package compatibility with ADS5440.

Technical Context

The ADS5444IPFP employs a monolithic pipeline architecture with bipolar BiCom3X process technology, using both clock edges to advance samples every half-cycle. Its input stage integrates a fully differential buffer and track-and-hold, isolating the signal source from internal switching noise while maintaining 1 kΩ differential input resistance and 1.5 pF input capacitance.

Conversion timing is synchronized to the rising edge of the differential CLK input, with deterministic 4-cycle latency and DataReady (DRY) signaling. Digital outputs follow offset binary format over 13 LVDS pairs (D0–D12), plus OVR and DRY status signals-all compliant with ANSI/TIA/EIA-644 LVDS standards at 3.3 V DRVDD.

Key Specifications

Pinout & Package

The ADS5444IPFP is housed in an 80-pin HTQFP PowerPAD™ package (PFP designation) with exposed thermal slug soldered to PCB ground plane. Thermal resistance θ_JA is 21.7°C/W with airflow and 50°C/W without airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5440IPFP, the ADS5444IPFP delivers 40 MSPS higher throughput and 4 dB better SFDR-critical for wideband 5G FR1 receivers. Against ADS5424IPFP, it trades 1-bit resolution for >2× speed and superior dynamic range at RF frequencies, making it optimal for IF-sampling architectures.

Availability

ADS5444IPFP is available at Aetrix Electronics and suitable for multi-channel basestation receivers, software-defined radio platforms, communications instrumentation, and Tx digital predistortion systems requiring stable component supply across extended product lifecycles.

Supply support for ADS5444IPFP 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 ADS5444IPFP belongs to TI's high-speed ADC portfolio designed specifically for wireless infrastructure and test equipment-emphasizing RF-sampling capability, low jitter sensitivity, and robust thermal performance in compact packages.

FAQ

What is the absolute maximum clock input voltage for ADS5444IPFP?

The absolute maximum differential clock voltage for ADS5444IPFP is ±2.5 V, with individual CLK/CLK pins rated from –0.3 V to AVDD+0.3 V (i.e., –0.3 V to 5.3 V). Exceeding these limits risks permanent damage. TI recommends a 3 VPP differential sine wave clock for optimal jitter performance, as specified in the recommended operating conditions.

Does ADS5444IPFP require an external reference voltage?

No, ADS5444IPFP does not require an external reference voltage. It integrates an internal 2.4 V reference generator that sets the full-scale differential input range to 2.2 VPP. The VREF pin is provided for optional external monitoring or calibration but is not needed for normal operation-reducing system component count and layout complexity.

What is the latency of ADS5444IPFP and how is it synchronized?

The ADS5444IPFP has a fixed latency of 4 clock cycles from CLK rising edge to valid data on D[12:0]. This latency is deterministic and independent of input frequency or temperature. Data validity is signaled by the DRY LVDS pair, which transitions synchronously with the clock falling edge-enabling precise timing alignment in FPGA or ASIC capture logic.

Can ADS5444IPFP be used with single-ended clock inputs?

Yes, ADS5444IPFP supports single-ended clock inputs. TI documentation shows CLK connected to ground via 0.01 µF capacitor while CLK is AC-coupled to the clock source. Performance remains comparable to differential mode for low-jitter applications, though differential clocking is preferred for RF-sensitive systems due to common-mode noise rejection and higher slew rate tolerance.

What thermal management is required for ADS5444IPFP in continuous operation?

ADS5444IPFP requires thermal vias under the PowerPAD™ slug (7.5 mm × 7.5 mm) connected to a solid ground plane to achieve θ_JA = 21.7°C/W with 250 LFPM airflow. Without airflow, θ_JA rises to 50°C/W. At 2.28 W dissipation and 85°C ambient, junction temperature must be kept below 150°C-necessitating ≥36 thermal vias (6×6 array) and adequate copper area per TI's application guidelines.