Texas Instruments ADS5273IPFP

Overview

ADS5273IPFP from Texas Instruments is an 8-channel, 12-bit, 70MSPS analog-to-digital converter with integrated PLL, simultaneous sample-and-hold, and serialized LVDS outputs. It delivers 71dBFS SNR at 5MHz IF, operates from 3.3V analog/digital supplies, and supports internal or external reference modes. It targets high-density portable ultrasound front-ends requiring low-power, multi-channel digitization.

For engineers reviewing the ADS5273IPFP datasheet, ADS5273IPFP pinout, ADS5273IPFP application, or ADS5273IPFP equivalent, this page provides verified technical context, real-world timing behavior, LVDS serialization format (LSB/MSB selectable), channel power-down control, and validated alternative options for multi-channel medical and test equipment designs.

Technical Context

The ADS5273IPFP integrates eight independent 12-bit ADC cores sharing a single ADCLK input, each with dedicated S/H and LVDS serializer. An on-chip PLL multiplies the sampling clock by 12 to generate 420MHz LCLK for data serialization, while ADCLKP/ADCLKN outputs run at 6× sampling rate (e.g., 420MHz at 70MSPS).

Each channel outputs 12-bit straight offset binary data over differential LVDS pairs (OUTxP/OUTxN), with configurable output current (2.5–6.0mA) and optional deskew/sync test patterns. The device supports per-channel power-down via registers 2 and 3, and uses VCM (1.45V typical) to bias all eight analog inputs in AC-coupled configurations.

Key Specifications

Pinout & Package

ADS5273IPFP is housed in an HTQFP-80 PowerPAD™ package (12mm × 12mm, 0.5mm pitch) with exposed thermal pad (4.69–6.20mm²). Pin assignments follow TI's standardized layout for 8-channel ADC families, enabling mechanical compatibility with ADS5270–ADS5272.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-channel ADC applications.

Compared with ADS5273IPFP, ADS5272IPFP trades 5MSPS bandwidth for reduced power and cost, while ADS5271IPFP further lowers speed and power for less demanding applications-both retain full software and layout compatibility within the ADS527x family.

Availability

ADS5273IPFP is available at Aetrix Electronics and suitable for portable ultrasound systems, automated test equipment, military radar receivers, and high-density data acquisition systems requiring stable component supply across extended production lifecycles.

Supply support for ADS5273IPFP 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 for mission-critical applications.

The ADS5273IPFP belongs to TI's ADS527x family of multi-channel, high-speed ADCs designed specifically for portable medical imaging, defense electronics, and automated test systems demanding synchronized sampling, low power, and robust LVDS interfacing.

FAQ

What is the maximum sampling rate supported by the ADS5273IPFP?

The ADS5273IPFP supports a maximum sampling rate of 70MSPS across all eight channels simultaneously. This rate is validated over the full –40°C to +85°C temperature range with AVDD and LVDD at 3.3V. At this rate, the device achieves 71dBFS SNR at 5MHz input frequency and maintains no missing codes performance. Exceeding 70MSPS is not guaranteed and may degrade AC specifications such as SFDR and ENOB.

Does the ADS5273IPFP require an external reference voltage?

No, the ADS5273IPFP includes an internal reference that provides a 2.03VPP full-scale range and is enabled by default via internal pull-up on the INT/EXT pin (pin 69). When INT/EXT is held high, the internal reference operates with 1.95V typical VREFT and 0.95V typical VREFB. External reference mode (INT/EXT = low) allows use of user-supplied REFT/REFB pins but requires careful decoupling with ≥0.1µF capacitors.

How does the LVDS serialization work on the ADS5273IPFP?

The ADS5273IPFP serializes each 12-bit ADC output into a continuous LVDS bitstream per channel, transmitted over dedicated OUTxP/OUTxN pairs. Data is output LSB-first by default (configurable to MSB-first via register 1), with LCLKP/LCLKN providing the 420MHz word clock and ADCLKP/ADCLKN delivering the 420MHz bit clock. Each channel outputs at 840Mbps (70MSPS × 12 bits), enabling compact 16-wire interface versus parallel alternatives.

Can individual ADC channels be powered down on the ADS5273IPFP?

Yes, the ADS5273IPFP supports per-channel power-down via two 4-bit configuration registers: Register 2 controls channels 1–4 (bits D3–D0), and Register 3 controls channels 5–8. Writing '1' to a bit disables the corresponding channel's ADC core, reducing total power by approximately 125mW per channel. All eight channels remain active after reset, and power-down state persists until reconfigured via the serial interface (SCLK/SDATA/CS).

What package type and thermal characteristics does the ADS5273IPFP use?

The ADS5273IPFP uses the HTQFP-80 PowerPAD™ package (12mm × 12mm, 0.5mm pitch) with an exposed thermal pad. Its thermal resistance is θJA = 19.4°C/W and θJC = 4.2°C/W, enabling efficient heat transfer to the PCB. The package supports standard reflow profiles and requires proper thermal via placement under the pad for reliable operation at full 1.099W dissipation in industrial temperature ranges.