Analog Devices Inc. LTC2234CUK#PBF

Overview

LTC2234CUK#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 135Msps pipeline analog-to-digital converter optimized for high-frequency signal digitization in communications infrastructure. It delivers 61dB SNR at 30MHz input, 75dB SFDR up to 400MHz, and 775MHz full-power bandwidth with 0.15psRMS aperture jitter - enabling undersampling of IF signals in cable head-end and wireless baseband systems.

For engineers reviewing the LTC2234CUK#PBF datasheet, LTC2234CUK#PBF pinout, LTC2234CUK#PBF application, or LTC2234CUK#PBF equivalent, key selection criteria include its ±0.5V/±1V selectable input range, CMOS output swing (0.5V–3.6V), clock duty cycle stabilizer, shutdown/nap modes, and 48-pin 7mm × 7mm QFN package with exposed thermal pad.

Technical Context

The LTC2234CUK#PBF implements a five-stage pipelined ADC architecture with integrated sample-and-hold, correction logic, and flexible reference control. Its differential analog input stage supports ±0.5V or ±1V ranges via SENSE pin configuration, while ENC+/ENC– accepts PECL/LVDS/TTL/CMOS clocks with optional duty cycle stabilization.

Digital outputs are CMOS-compatible with separate OVDD supply (0.5V–3.6V), enabling level-shifting to FPGA or ASIC interfaces. Pipeline latency is fixed at 5 cycles, and timing parameters including tD (1.3–3.5ns ENC-to-data delay) and tC (1.3–3.5ns ENC-to-CLOCKOUT delay) are specified over 0°C to 70°C operating range.

Key Specifications

Pinout & Package

Package: 48-lead plastic QFN (7mm × 7mm) with exposed thermal pad (Pin 49 = GND). Requires soldering of exposed pad to PCB ground plane 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 AD9215BCPZ-130 and LTC2224IUK#PBF, the LTC2234CUK#PBF uniquely combines 135Msps speed, 75dB SFDR at 400MHz, and on-chip input range flexibility - making it optimal for reconfigurable IF receivers where signal amplitude varies across standards or bands.

Availability

LTC2234CUK#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 production continuity.

Supply support for LTC2234CUK#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 DSP technologies, serving aerospace, industrial, automotive, and communications markets.

The LTC2234CUK#PBF belongs to Linear's high-speed ADC product line, engineered specifically for demanding communications applications requiring ultralow jitter, wide full-power bandwidth, and flexible interface options.

FAQ

What is the operating temperature range for the LTC2234CUK#PBF?

The LTC2234CUK#PBF is rated for commercial temperature operation from 0°C to 70°C. This grade is indicated by the "C" suffix in the part number and is validated per the absolute maximum and electrical specifications in the official datasheet. The device maintains full performance across this range, including guaranteed 61dB SNR and 75dB SFDR at 25°C and endpoint temperatures.

Does the LTC2234CUK#PBF support both offset binary and 2's complement output formats?

Yes, the LTC2234CUK#PBF supports both output formats via the MODE pin (Pin 42). Connecting MODE to 0V or VDD selects offset binary; connecting to 1/3 VDD or 2/3 VDD selects 2's complement. The clock duty cycle stabilizer is independently enabled or disabled based on the same voltage level, allowing format and jitter control to be configured together.

How is the input full-scale range selected on the LTC2234CUK#PBF?

The LTC2234CUK#PBF uses the SENSE pin (Pin 43) to select input range: tying SENSE to VCM (1.6V) configures ±0.5V differential range; tying to VDD (3.3V) configures ±1V differential range. An external voltage between 0.5V and 1V applied to SENSE sets ±V_SENSE, enabling precise matching to signal chain gain without external resistive dividers.

What is the purpose of the CLOCKOUT signal on the LTC2234CUK#PBF?

The CLOCKOUT signal (Pin 20) is a data-valid strobe synchronized to the internal sampling clock. Its falling edge marks the time when D0–D9 outputs are stable and ready for capture by an FPGA or ASIC. With ≤±0.6ns skew relative to data, CLOCKOUT enables reliable synchronous latching without additional timing margin constraints in high-speed digital interfaces.

Can the LTC2234CUK#PBF operate with a single-ended analog input?

Yes, the LTC2234CUK#PBF supports single-ended analog input: drive AIN+ with the signal and tie AIN– to VCM (1.6V). While SNR and DNL remain unaffected, INL and harmonic distortion degrade slightly versus differential drive. This mode is suitable for cost-sensitive applications where second-harmonic suppression is not critical, such as certain broadband monitoring functions.