Analog Devices Inc. LTC2233IUK#PBF

Overview

LTC2233IUK#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 80Msps high-speed analog-to-digital converter optimized for undersampling wideband IF signals in communications infrastructure. It delivers 61dB SNR at 140MHz input and 75dB SFDR up to 200MHz, operates from a single 3.3V supply, dissipates only 366mW, and supports ±0.5V or ±1V differential input ranges - enabling use in cable head-end digitization and power amplifier linearization.

For engineers reviewing the LTC2233IUK#PBF datasheet, LTC2233IUK#PBF pinout, LTC2233IUK#PBF application, or LTC2233IUK#PBF equivalent, key selection criteria include its 775MHz full-power bandwidth, 0.15psRMS aperture jitter, flexible output voltage range (0.5V–3.6V), shutdown/nap modes, and compatibility with LVDS/PECL/TTL/CMOS clock inputs - all in a thermally enhanced 48-pin 7mm × 7mm QFN package.

Technical Context

The LTC2233IUK#PBF employs a five-stage CMOS pipelined ADC architecture with integrated sample-and-hold, correction logic, and flexible reference programming via SENSE and MODE pins. Its differential analog input path supports both high-impedance and low-impedance drive, while the separate OVDD rail enables direct interfacing with 1.8V/2.5V/3.3V logic families.

It features an optional clock duty cycle stabilizer, data-ready CLOCKOUT signal, over/underflow flag (OF), and configurable output format (offset binary or 2's complement). The internal 1.6V VCM bias generator and programmable full-scale range provide system-level flexibility without external reference components.

Key Specifications

Pinout & Package

Package: 48-lead plastic QFN (7mm × 7mm), exposed pad (Pin 49) soldered to PCB ground for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9215BRUZ-80, LTC2233IUK#PBF offers superior jitter performance and integrated reference flexibility; compared with LTC2232IUK#PBF, it trades 25Msps sample rate for 109mW lower power - making it optimal for thermally constrained 80Msps IF receivers.

Availability

LTC2233IUK#PBF is available at Aetrix Electronics and suitable for cable head-end systems, wireless base station receivers, and power amplifier linearization circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2233IUK#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 industrial, automotive, communications, and healthcare markets.

The LTC2233IUK#PBF belongs to ADI's high-speed data converter product line, engineered specifically for demanding communications infrastructure applications where low jitter, wide bandwidth, and low power are critical.

FAQ

What is the maximum input frequency supported by the LTC2233IUK#PBF before SNR degrades below 60dB?

The LTC2233IUK#PBF maintains ≥60.4dB SNR up to 140MHz input frequency when using a 2Vpp differential input range. At 250MHz, SNR drops to 61.1dB (2Vpp) - still above 60dB - but further increases in input frequency reduce SNR due to bandwidth roll-off and aperture jitter effects. For guaranteed ≥61dB SNR, limit input to ≤140MHz.

Does the LTC2233IUK#PBF require external reference components to operate?

No. The LTC2233IUK#PBF includes an internal 1.6V VCM generator and supports fully self-contained operation using only the SENSE pin to select ±0.5V or ±1V input range. External references are optional and only needed if custom full-scale ranges (e.g., ±0.75V) are required - in which case a precision voltage applied to SENSE sets the range.

How does the MODE pin configuration affect the output data format and clock stabilizer on the LTC2233IUK#PBF?

The MODE pin on the LTC2233IUK#PBF selects both output format and duty cycle stabilizer state: grounded = offset binary + stabilizer off; 1/3 VDD = offset binary + stabilizer on; 2/3 VDD = 2's complement + stabilizer on; VDD = 2's complement + stabilizer off. This dual-function pin reduces external control lines while enabling precise matching of data format to host processor requirements.

Can the LTC2233IUK#PBF interface directly with a 1.8V FPGA I/O bank?

Yes. The LTC2233IUK#PBF uses a separate OVDD supply pin (Pins 23, 28, 33, 37) that accepts 0.5V–3.6V. Setting OVDD = 1.8V configures all D0–D9 outputs and CLOCKOUT to 1.8V logic levels with guaranteed VOL ≤ 0.09V and VOH ≥ 1.79V at 1.6mA load - meeting standard 1.8V LVTTL/LVCMOS specifications without level shifters.

What is the pipeline latency of the LTC2233IUK#PBF, and how does it impact system timing alignment?

The LTC2233IUK#PBF has a fixed pipeline latency of 5 clock cycles - meaning the digital output corresponding to a given analog sample appears 5 sampling periods after the sample is acquired. This deterministic delay enables precise time-of-flight compensation in closed-loop systems like DPD, and CLOCKOUT's tight skew (±0.6ns) to data allows synchronous capture in FPGA fabric without additional deskew logic.