Texas Instruments ADS5277IPFPG4

Overview

ADS5277IPFPG4 from Texas Instruments is an 8-channel, 10-bit, 65MSPS analog-to-digital converter with integrated PLL, simultaneous sample-and-hold, and serialized LVDS outputs. It delivers 61.7dBFS SNR at 5MHz IF, operates from 3.3V analog/digital supplies, and supports internal or external reference modes. It targets high-density portable ultrasound systems requiring low-power, multi-channel digitization.

For engineers reviewing the ADS5277IPFPG4 datasheet, ADS5277IPFPG4 pinout, ADS5277IPFPG4 application, or ADS5277IPFPG4 equivalent, key selection considerations include its 8-channel LVDS serialization architecture, 12-bit word format (10-bit ADC + 2 LSB zeros), frame/bit pattern generation capability, and configurable LVDS output current (2.5–6.0mA per channel).

Technical Context

The ADS5277IPFPG4 integrates eight independent 10-bit ADC cores with simultaneous sampling, each followed by a serializer that outputs 12-bit words (10 valid bits + 2 zero LSBs) over LVDS pairs. An on-chip PLL multiplies the ADCLK input by 12 to generate the 390MHz LCLK for serialization.

It supports LSB-first or MSB-first data ordering via register control, provides four programmable LVDS output current levels, and includes dedicated registers for channel power-down, clock current doubling, and test pattern generation (deskew, sync, custom). Reference mode is selected via INT/EXT pin with internal 1.95V top / 0.95V bottom references.

Key Specifications

Pinout & Package

ADS5277IPFPG4 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 in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5272IPFP and ADS5273IPFP, the ADS5277IPFPG4 delivers the lowest power consumption and tightest aperture jitter at its rated 65MSPS, making it the most efficient choice for portable, thermally constrained, and timing-critical 10-bit digitization tasks.

Availability

ADS5277IPFPG4 is available at Aetrix Electronics and suitable for portable ultrasound systems, automated test equipment, and communications baseband receivers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.

Supply support for ADS5277IPFPG4 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 medical applications.

The ADS5277IPFPG4 belongs to TI's high-speed, multi-channel ADC product line designed specifically for portable medical imaging and test instrumentation where simultaneous sampling, low power, and serialized interface density are critical.

FAQ

What is the maximum sampling rate supported by the ADS5277IPFPG4?

The ADS5277IPFPG4 supports a maximum sampling rate of 65MSPS. This rate is specified across the full operating temperature range (–40°C to +85°C) with AVDD and LVDD at 3.3V, and applies to all eight channels simultaneously. The device accepts ADCLK inputs from 20MHz to 65MHz with a 45–55% duty cycle requirement to maintain specification compliance. At 65MSPS, the ADS5277IPFPG4 achieves 61.7dBFS SNR at 5MHz input frequency.

Does the ADS5277IPFPG4 require an external reference voltage?

No, the ADS5277IPFPG4 does not require an external reference voltage. It includes an internal reference with REFT = 1.95V and REFB = 0.95V (typical), providing a 1.0V reference span and 1.45V common-mode voltage (VCM). The INT/EXT pin selects internal mode by default (weak internal pull-up). External reference mode is optional and requires REFT/REFB voltages within 1.825–2.0V and 0.9–1.075V respectively, with VCM matching within ±50mV.

How many LVDS data output pairs does the ADS5277IPFPG4 provide?

The ADS5277IPFPG4 provides eight differential LVDS data output pairs: OUT1P/OUT1N through OUT8P/OUT8N - one pair per ADC channel. Each pair transmits a 12-bit serialized word containing the 10-bit ADC result (plus two zero LSBs) in either LSB-first or MSB-first order, configurable via serial register. Additionally, it outputs two LVDS clock pairs: ADCLKP/ADCLKN (1× ADCLK) and LCLKP/LCLKN (6× ADCLK).

What package type and thermal characteristics does the ADS5277IPFPG4 use?

The ADS5277IPFPG4 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. The thermal pad must be soldered to a solid copper plane for effective heat dissipation. The device operates from –40°C to +85°C ambient, with a maximum junction temperature of +105°C. Proper PCB layout with dedicated AVDD/LVDD planes and thermal vias under the pad is essential for reliable operation at full power (911mW).

Can individual ADC channels be powered down on the ADS5277IPFPG4?

Yes, the ADS5277IPFPG4 supports per-channel power-down via two dedicated configuration registers. Register 2 controls power state for 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 and associated LVDS driver, reducing dynamic power proportionally. For example, powering down four channels cuts total power by approximately 450mW (based on per-channel analog + LVDS contribution), while maintaining full functionality for active channels.