Analog Devices Inc. LTC2239IUH#TRPBF

Overview

LTC2239IUH#TRPBF from Analog Devices (formerly Linear Technology) is a 10-bit, 80Msps low-noise 3V analog-to-digital converter optimized for high-frequency signal digitization in imaging and communications systems. It delivers 61.6dB SNR at 70MHz input, 85dB SFDR, ±0.1LSB typical INL/DNL, and operates from a single 2.7V–3.4V supply with 211mW power consumption.

For engineers reviewing the LTC2239IUH#TRPBF datasheet, LTC2239IUH#TRPBF pinout, LTC2239IUH#TRPBF application, or LTC2239IUH#TRPBF equivalent, key selection criteria include full-power bandwidth (575MHz), clock duty cycle stabilizer support, flexible 1V_P-P–2V_P-P input range, and QFN-32 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The LTC2239IUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with integrated sample-and-hold, correction logic, and output drivers. Its differential analog front end supports ±0.5V to ±1V input ranges via SENSE pin configuration, while VCM provides a stable 1.5V common-mode bias.

It features a dedicated clock duty cycle stabilizer, shutdown/nap modes (2mW / 15mW), and flexible digital output interface with OVDD programmable from 0.5V to 3.6V. The device uses internal 1.5V bandgap reference with external REFH/REFL pins for precision scaling and noise-sensitive applications requiring low transition noise (0.08LSB_RMS).

Key Specifications

Pinout & Package

Package: 32-lead (5mm × 5mm) plastic QFN with exposed pad (GND, Pin 33), RoHS-compliant and lead-free (#PBF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2238IUH#TRPBF and AD9215BRUZ-80, the LTC2239IUH#TRPBF uniquely combines 80Msps speed, integrated clock duty cycle stabilization, and dual-voltage digital outputs - enabling robust, low-risk integration into thermally constrained, high-dynamic-range systems without added support components.

Availability

LTC2239IUH#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical ultrasound, portable instrumentation, and test & measurement applications requiring stable component supply across industrial temperature grades and long production lifecycles.

Supply support for LTC2239IUH#TRPBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.

The LTC2239IUH#TRPBF belongs to Linear's high-speed precision ADC product line, designed specifically for demanding RF, imaging, and instrumentation applications where SNR, SFDR, and low power coexist under industrial environmental stress.

FAQ

What is the operating temperature range for the LTC2239IUH#TRPBF?

The LTC2239IUH#TRPBF is rated for industrial operation from –40°C to +85°C. This specification is validated across all key AC and DC parameters including SNR, SFDR, INL, and DNL, making it suitable for deployment in outdoor base stations, portable medical devices, and factory-floor test equipment where ambient conditions vary widely.

Does the LTC2239IUH#TRPBF support both offset binary and 2's complement output formats?

Yes, the LTC2239IUH#TRPBF supports both output formats via the MODE pin. Tying MODE to GND or VDD yields offset binary; applying 2/3VDD or VDD selects 2's complement. This flexibility simplifies FPGA or DSP interface design without requiring external logic translation, and is fully documented in the LTC2239IUH#TRPBF datasheet timing diagrams.

How does the clock duty cycle stabilizer in the LTC2239IUH#TRPBF improve system design?

The clock duty cycle stabilizer in the LTC2239IUH#TRPBF relaxes input clock symmetry requirements - allowing reliable 80Msps operation even with 40%–60% duty cycle clocks. This eliminates need for external duty cycle correction circuits, reduces BOM count, and improves timing margin in systems using PLLs or crystal oscillators with inherent asymmetry, directly enhancing LTC2239IUH#TRPBF design robustness.

Can the LTC2239IUH#TRPBF operate with a 1.8V digital supply (OVDD)?

Yes, the LTC2239IUH#TRPBF supports OVDD from 0.5V to 3.6V, including 1.8V. At OVDD = 1.8V, VOH is guaranteed ≥1.79V and VOL ≤0.09V under 1.6mA load - ensuring compatible interfacing with 1.8V FPGA I/O banks and low-voltage microcontrollers without level shifters, as confirmed in the LTC2239IUH#TRPBF digital output specifications table.

What is the purpose of the SENSE pin on the LTC2239IUH#TRPBF?

The SENSE pin on the LTC2239IUH#TRPBF programs the analog input full-scale range: tied to VDD → ±1V differential (2V_P-P); tied to VCM → ±0.5V (1V_P-P). It also accepts external voltages (0.5V–1V) to set custom ranges, enabling SNR/SFDR trade-off optimization per application - a feature explicitly defined in the LTC2239IUH#TRPBF functional description and reference circuit diagrams.