Analog Devices Inc. LTC2233CUK#PBF

Overview

LTC2233CUK#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 digitizers and power amplifier linearization loops.

For engineers reviewing the LTC2233CUK#PBF datasheet, LTC2233CUK#PBF pinout, LTC2233CUK#PBF application, or LTC2233CUK#PBF equivalent, key selection criteria include its 775MHz full-power bandwidth, 0.15psRMS aperture jitter, 48-pin 7mm × 7mm QFN package with exposed thermal pad, and support for offset binary or 2's complement output formats via MODE pin configuration.

Technical Context

The LTC2233CUK#PBF implements a five-stage CMOS pipelined ADC architecture with integrated sample-and-hold, correction logic, and flexible reference management. Its differential ENC+/ENC– clock interface accepts sine wave, LVDS, PECL, TTL, or CMOS inputs, and optional duty cycle stabilization maintains performance across non-50% clock waveforms.

It features separate analog (VDD) and digital output (OVDD) supplies - allowing output drivers to interface with 0.5V–3.6V logic families - and includes SHDN/OE control for shutdown, nap, and high-impedance output modes. Pipeline latency is fixed at 5 cycles, with tD (ENC to DATA delay) specified at 1.3–4ns over temperature.

Key Specifications

Pinout & Package

Package: 48-lead 7mm × 7mm plastic QFN with exposed thermal pad (Pin 49 = GND), RoHS-compliant lead-free finish (#PBF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9215BRUZ-80, LTC2233CUK#PBF offers superior high-frequency SFDR and integrated reference flexibility; compared with LTC2223CUK#PBF, it trades 2 bits of resolution for 109mW lower power and better spurious performance in wideband IF sampling.

Availability

LTC2233CUK#PBF is available at Aetrix Electronics and suitable for cable head-end systems, wireless infrastructure equipment, and communications test instrumentation requiring stable component supply and long-term obsolescence management.

Supply support for LTC2233CUK#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2233CUK#PBF belongs to Linear's high-speed ADC product line, engineered specifically for communications infrastructure where wide input bandwidth, low jitter, and flexible power/performance trade-offs are essential.

FAQ

What is the operating temperature range for the LTC2233CUK#PBF?

The LTC2233CUK#PBF is rated for commercial operation from 0°C to 70°C (C-grade). This is explicitly defined in the Absolute Maximum Ratings table and confirmed across all DC and AC specifications marked with the ● symbol for full-temperature-range compliance. The part marking "CUK" denotes the C-grade variant, distinct from the I-grade (–40°C to 85°C) version LTC2233IUK#PBF.

Does the LTC2233CUK#PBF require an external reference voltage?

No, the LTC2233CUK#PBF includes an internal 1.6V reference buffer (VCM pin) and supports fully self-contained operation. Input range is selected via the SENSE pin: connecting SENSE to VCM configures ±0.5V range; to VDD configures ±1V range. External references are optional and only used when precise custom input scaling (e.g., ±0.75V) is needed.

Can the LTC2233CUK#PBF interface directly with a 1.8V FPGA I/O bank?

Yes - the LTC2233CUK#PBF uses a separate OVDD supply pin (Pins 23, 28, 33, 37) that accepts 0.5V to 3.6V. Setting OVDD = 1.8V configures all D0–D9 outputs, CLOCKOUT, and OF to swing between 0V and 1.8V, meeting standard 1.8V LVCMOS voltage thresholds without level-shifting circuitry.

What is the pipeline latency of the LTC2233CUK#PBF, and how does it affect system timing?

The LTC2233CUK#PBF has a fixed pipeline latency of 5 conversion cycles. For example, at 80Msps, this equals 62.5ns. This deterministic delay is critical for closed-loop applications like digital predistortion, where the feedback path must account for this fixed offset to align captured output samples with corresponding input stimuli.

How does the MODE pin configure output format and clock duty cycle stabilization on the LTC2233CUK#PBF?

The MODE pin voltage selects both output coding and stabilizer state: 0V → offset binary + stabilizer off; 1/3 VDD (~1.1V) → offset binary + stabilizer on; 2/3 VDD (~2.2V) → 2's complement + stabilizer on; VDD → 2's complement + stabilizer off. This dual-function pin eliminates external configuration registers and simplifies PCB layout.