Texas Instruments ADS5273IPFPT

Overview

ADS5273IPFPT 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 uses internal or external reference modes. It targets high-density portable ultrasound front-ends requiring low-power, multi-channel digitization.

For engineers reviewing the ADS5273IPFPT datasheet, ADS5273IPFPT pinout, ADS5273IPFPT application, or ADS5273IPFPT equivalent, key selection criteria include channel count, LVDS serialization format (LSB/MSB first), internal PLL multiplication factor (×12), LVDS output current programmability (2.5–6.0mA), and TQFP-80 PowerPAD thermal performance (θJC = 4.2°C/W).

Technical Context

The ADS5273IPFPT 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 input sampling clock by 12 to generate high-frequency LVDS bit clocks (up to 420MHz) and word clocks (up to 70MHz) for data transmission.

It supports dual reference modes: internal (1.95V REFT / 0.95V REFB, 2.03VPP full-scale) or external (REFT/REFB programmable within 1.825–2.0V and 0.9–1.075V). Serial configuration via SPI-like interface (SCLK/SDATA/CS) enables runtime control of LVDS current, data order, channel power-down, and test pattern generation.

Key Specifications

Pinout & Package

ADS5273IPFPT is housed in an HTQFP-80 PowerPAD™ package (12mm × 12mm, 0.5mm pitch) with exposed thermal pad (4.69–6.20mm²) for enhanced heat dissipation. Pin assignments are validated per TI SBAS305D datasheet Figure 18 (Pin Configuration) and Table 1 (Pin Descriptions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel, high-speed ADC applications.

Compared with ADS5273IPFPT, ADS5272IPFPT offers identical functionality at reduced speed for thermal margin, while ADS5277IPFPT sacrifices 2 bits of resolution to cut power and interface complexity-both retain pin compatibility but require firmware validation for register-level differences.

Availability

ADS5273IPFPT is available at Aetrix Electronics and suitable for portable ultrasound systems, automated test equipment, military radar receivers, and industrial NDT systems requiring stable component supply across extended production lifecycles.

Supply support for ADS5273IPFPT 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.

The ADS5273IPFPT belongs to TI's high-speed, multi-channel ADC product line designed specifically for portable medical imaging, test instrumentation, and defense electronics demanding low power, small footprint, and robust LVDS interfacing.

FAQ

What is the maximum sampling rate supported by the ADS5273IPFPT?

The ADS5273IPFPT supports a maximum sampling rate of 70MSPS across all eight channels simultaneously. This rate is fully characterized over the full operating temperature range (–40°C to +85°C) and enables digitization of input signals up to 35MHz under Nyquist criteria. The device maintains specified AC performance-including 71dBFS SNR at 5MHz-only when operated at or below this rated maximum.

Does the ADS5273IPFPT require an external reference voltage?

No, the ADS5273IPFPT includes a trimmed internal reference (1.95V REFT / 0.95V REFB) that delivers 2.03VPP full-scale differential input range and is recommended for best performance. External reference mode is optional and requires driving REFT and REFB pins within 1.825–2.0V and 0.9–1.075V respectively; it is used when system-level calibration or gain matching across multiple ADCs is required.

How is data serialized and transmitted from the ADS5273IPFPT?

The ADS5273IPFPT serializes each 12-bit ADC output into an 840Mbps LVDS stream using a ×12 internal PLL. Eight independent differential data pairs (OUT1P/N through OUT8P/N) transmit LSB-first by default. Two LVDS clock pairs-ADCLKP/N (70MHz word clock) and LCLKP/N (420MHz bit clock)-are provided, with programmable 2× current drive for improved signal integrity on long traces.

What package type and thermal characteristics does the ADS5273IPFPT use?

The ADS5273IPFPT is packaged in an HTQFP-80 PowerPAD™ (12mm × 12mm, 0.5mm pitch) with an exposed thermal pad. Its thermal resistance is θJC = 4.2°C/W (junction-to-case) and θJA = 19.4°C/W (junction-to-ambient, JEDEC standard board), enabling efficient heat transfer to the PCB ground plane-critical for maintaining performance in high-density portable ultrasound modules.

Can individual ADC channels be powered down on the ADS5273IPFPT?

Yes, the ADS5273IPFPT supports per-channel power-down via registers 2 and 3. Register 2 controls channels 1–4 (bits D3–D0), and register 3 controls channels 5–8. Setting a bit to '1' powers down the corresponding channel, reducing total power consumption. In full power-down mode (all channels off), the device draws only 95–149mW while maintaining clock functionality for rapid wake-up.