Analog Devices Inc. LTC2217IUP#PBF

Overview

LTC2217IUP#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 105Msps analog-to-digital converter optimized for high-frequency undersampling applications up to 400MHz full-power bandwidth, with fixed 2.75V_P-P differential input range, 85fs_RMS aperture jitter, and 81.3dBFS noise floor. It serves as the front-end digitizer in wideband receivers, spectrum analyzers, and cellular base station transceivers.

For engineers reviewing the LTC2217IUP#PBF datasheet, LTC2217IUP#PBF pinout, LTC2217IUP#PBF application, or LTC2217IUP#PBF equivalent, key selection criteria include SFDR >90dB at 70MHz, LVDS/CMOS output flexibility, internal dither enablement, clock duty cycle stabilization, and –40°C to +85°C industrial temperature rating.

Technical Context

The LTC2217IUP#PBF employs a 16-bit pipelined ADC architecture with integrated sample-and-hold, correction logic, and shift register output staging. Its ultra-low 85fs_RMS aperture jitter enables accurate undersampling of RF signals beyond Nyquist, while the 400MHz full-power bandwidth supports direct IF sampling of LTE and 5G NR bands.

Dual-output mode support includes standard or low-power LVDS (100Ω differential termination) and configurable CMOS (full-rate or demultiplexed), with separate OVDD supply (0.5V–3.6V) enabling interface compatibility with FPGA I/O banks. Clock inputs accept differential sine, PECL, LVDS, TTL, or CMOS, and an optional internal duty cycle stabilizer maintains performance across 30%–70% duty cycles.

Key Specifications

Pinout & Package

Package: 64-pin (9mm × 9mm) plastic QFN with exposed thermal pad (Pin 65 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9268BCPZ-105 and LTC2208IUP#PBF, the LTC2217IUP#PBF uniquely combines 105Msps speed, on-chip dither, clock duty cycle stabilization, and single 3.3V supply-making it optimal for new RF undersampling designs demanding both flexibility and verified wideband linearity.

Availability

LTC2217IUP#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, spectrum analysis equipment, and automated test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2217IUP#PBF 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

Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving communications, industrial, automotive, and healthcare markets with precision data conversion solutions.

The LTC2217IUP#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding RF and IF digitization in wireless infrastructure, defense electronics, and scientific instrumentation where wide dynamic range and low jitter are non-negotiable.

FAQ

What is the guaranteed operating temperature range for the LTC2217IUP#PBF?

The LTC2217IUP#PBF is specified for continuous operation from –40°C to +85°C, with all critical AC and DC parameters-including INL (±4LSB), SFDR (≥85dBc at 70MHz), and SNR (≥79.3dBFS)-guaranteed across this full industrial temperature range per the official datasheet.

Does the LTC2217IUP#PBF support both LVDS and CMOS digital outputs simultaneously?

No-the LTC2217IUP#PBF supports either LVDS or CMOS output modes, selected via the LVDS pin (Pin 61). In LVDS mode, all data and clock outputs are differential; in CMOS mode, outputs are single-ended and configurable as full-rate (16-bit bus @ 105MHz) or demultiplexed (two 16-bit buses @ 52.5MHz).

How does the internal dither function improve SFDR in the LTC2217IUP#PBF?

When enabled via DITH pin (Pin 20), the LTC2217IUP#PBF injects controlled noise into the ADC core, breaking up harmonic correlation and reducing spurious tones. This raises SFDR from 105dBFS to 115dBFS at –25dBFS input levels-critical for detecting low-level signals near strong interferers in spectrum analysis.

Is the LTC2217IUP#PBF pin-compatible with earlier Linear Technology ADCs?

Yes-the LTC2217IUP#PBF is pin-compatible with the LTC2208, sharing identical 64-QFN footprint, pin numbering, and core signal assignments (e.g., AIN+, ENC+, D0–/D0+, VDD, GND). This enables drop-in replacement in existing layouts without PCB revision, provided clock and power delivery meet the higher 105Msps requirements.

What is the purpose of the VCM pin (Pin 3) on the LTC2217IUP#PBF?

The VCM pin on the LTC2217IUP#PBF provides a buffered 1.575V output used as the common-mode bias voltage for the differential analog input (AIN+/AIN–). It must be bypassed with ≥2.2μF ceramic capacitance to ground to maintain low-noise operation and ensure stable input common-mode rejection across temperature and frequency.