Analog Devices Inc. LTC2259IUJ-14#PBF

Overview

LTC2259IUJ-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 80Msps ultralow-power analog-to-digital converter optimized for undersampling wideband IF signals in communications infrastructure. It delivers 73.1dB SNR, 85dB SFDR, and 0.17psRMS aperture jitter with single 1.8V supply, 800MHz full-power bandwidth, and selectable CMOS/LVDS output modes - deployed in portable medical imaging and multi-channel data acquisition systems.

For engineers reviewing the LTC2259IUJ-14#PBF datasheet, LTC2259IUJ-14#PBF pinout, LTC2259IUJ-14#PBF application, or LTC2259IUJ-14#PBF equivalent, this page provides verified specifications, validated pin functions, temperature-grade–specific performance data (–40°C to +85°C), and real-world substitution guidance for high-speed ADC selection in RF-sampling architectures.

Technical Context

The LTC2259IUJ-14#PBF implements a 14-bit pipelined ADC core with integrated sample-and-hold, correction logic, and configurable digital output drivers. Its architecture supports differential or single-ended clock inputs (ENC+/ENC–), optional duty cycle stabilization, and serial SPI configuration via PAR/SER-controlled interface.

It features dual reference options (internal 1.25V VREF or external SENSE-programmed range), programmable input common-mode bias (VCM), and three output configurations: full-rate CMOS, DDR CMOS, or DDR LVDS - each with independent OVDD supply and on-chip termination (LVDS mode).

Key Specifications

Pinout & Package

40-lead (6mm × 6mm) plastic QFN package (UJ) with exposed thermal pad (Pin 41 = GND). Requires soldering 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 AD9246BCPZ-80, LTC2259IUJ-14#PBF offers integrated reference, lower power, and CMOS/LVDS flexibility; compared with LTC2260IUJ-14#PBF, it trades 25Msps speed for 17mW lower power and relaxed timing margins - optimizing for thermal-constrained or battery-operated deployments.

Availability

LTC2259IUJ-14#PBF is available at Aetrix Electronics and suitable for cellular base stations, portable medical imaging, and nondestructive testing requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for LTC2259IUJ-14#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP solutions, serving precision instrumentation, communications, and industrial markets.

The LTC2259IUJ-14#PBF belongs to Linear's ultralow-jitter, low-power high-speed ADC family - designed specifically for undersampling RF/IF signals in space- and power-constrained communications and test equipment.

FAQ

What is the maximum sampling rate supported by the LTC2259IUJ-14#PBF?

The LTC2259IUJ-14#PBF supports a maximum sampling rate of 80Msps, as specified in its ordering part number suffix "-14" and confirmed in the Absolute Maximum Ratings and Dynamic Accuracy sections of the official datasheet. This rate is guaranteed across the full –40°C to +85°C operating temperature range with proper power supply decoupling and clock signal integrity.

Does the LTC2259IUJ-14#PBF include an internal voltage reference?

Yes, the LTC2259IUJ-14#PBF includes an internal 1.25V reference (VREF, Pin 38) with ±25ppm/°C drift and 1.225–1.275V tolerance. The SENSE pin (Pin 39) selects between ±0.5V and ±1V input ranges when using the internal reference, or accepts 0.625–1.3V external references for custom scaling - all verified in the Internal Reference Characteristics table.

Can the LTC2259IUJ-14#PBF operate with a 1.2V digital output supply (OVDD)?

Yes, the LTC2259IUJ-14#PBF supports OVDD from 1.1V to 1.9V in CMOS output modes. At OVDD = 1.2V, it delivers CMOS output levels of VOH ≥ 1.185V and VOL ≤ 0.010V (IO = ±500µA), enabling direct interfacing with 1.2V FPGA I/O banks - confirmed in the Digital Data Outputs (CMOS Modes) section of the datasheet.

What is the function of the PAR/SER pin on the LTC2259IUJ-14#PBF?

The PAR/SER pin (Pin 8) selects the programming interface mode: grounded for serial SPI control (CS/SCK/SDI/SDO active), or tied to VDD for parallel mode (CS/SCK/SDI repurposed for clock stabilizer, output mode, and sleep control). This dual-mode capability is explicitly defined in the Pin Functions section and enables both fine-grained configuration and simplified hardware control.

Is the LTC2259IUJ-14#PBF pin-compatible with other devices in the LTC22xx-14 family?

Yes, the LTC2259IUJ-14#PBF is fully pin-compatible with the LTC2260-14 and LTC2261-14 in the same UJ (40-lead QFN) package, sharing identical pin count, layout, and signal assignments - as stated in the Features list ("Pin Compatible 14-Bit and 12-Bit Versions") and confirmed in all three Pin Configuration diagrams (full-rate CMOS, DDR CMOS, DDR LVDS).