Analog Devices Inc. LTC2284CUP#PBF

Overview

LTC2284CUP#PBF from Analog Devices (formerly Linear Technology) is a dual 14-bit, 105Msps low-power analog-to-digital converter operating from a single 3V supply. It delivers 72.4dB SNR and 88dB SFDR at Nyquist, with 110dB channel isolation at 100MHz and 575MHz full-power bandwidth - optimized for high-fidelity digitization in broadband communications and imaging systems.

For engineers reviewing the LTC2284CUP#PBF datasheet, LTC2284CUP#PBF pinout, LTC2284CUP#PBF application, or LTC2284CUP#PBF equivalent, key selection considerations include dual-channel timing alignment, flexible ±0.5V to ±1V differential input range, clock duty cycle stabilization, and QFN-64 package thermal management via exposed ground pad.

Technical Context

The LTC2284CUP#PBF implements a six-stage CMOS pipelined ADC architecture with integrated sample-and-hold, internal 1.5V reference, and independent channel control logic. Each channel features dedicated REFH/REFL pairs, SENSE pins for input range programming, and separate shutdown (SHDNA/SHDNB) and output enable (OEA/OEB) controls.

It supports offset binary or 2's complement output formats selected via MODE pin voltage, and includes a clock duty cycle stabilizer that maintains performance across 30%–70% input clock duty cycles. Dual digital output busses (DA0–DA13/DB0–DB13) can be multiplexed via MUX pin or operated independently.

Key Specifications

Pinout & Package

Package: 64-lead (9mm × 9mm) plastic QFN with exposed thermal pad (Pin 65 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity (θ_JA = 20°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9288BSTZ-100 and LTC2282IUP#PBF, the LTC2284CUP#PBF provides 2 extra bits of resolution and integrated clock stabilization - delivering higher ENOB and simplified board design at the cost of slightly lower SFDR and higher power than the 8-bit alternative.

Availability

LTC2284CUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, spectral analysis, and portable instrumentation requiring stable component supply across extended temperature ranges (0°C to 70°C).

Supply support for LTC2284CUP#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 communications, industrial, automotive, and healthcare markets.

The LTC2284CUP#PBF belongs to ADI's high-speed precision ADC product line, engineered for demanding digitization tasks where simultaneous dual-channel acquisition, low jitter, and wide input bandwidth are essential.

FAQ

What is the operating temperature range for the LTC2284CUP#PBF?

The LTC2284CUP#PBF is rated for commercial temperature operation from 0°C to 70°C. This grade is designated by the "C" suffix in the part number and is validated per the datasheet's LTC2284C specifications, including DC accuracy, SNR, and power consumption across that range.

Does the LTC2284CUP#PBF require external reference components?

No - the LTC2284CUP#PBF integrates an internal 1.5V reference and supports both internal and external reference configurations. When using the internal reference, SENSEA/SENSEB must be tied to VCMA/VCMB (±0.5V range) or VDD (±1V range); external references connect directly to REFHA/REFLA and REFHB/REFLB pins.

How does the clock duty cycle stabilizer function in the LTC2284CUP#PBF?

The clock duty cycle stabilizer in the LTC2284CUP#PBF is enabled when the MODE pin is set to 1/3 VDD or 2/3 VDD. It actively corrects input clock duty cycles from 30% to 70%, ensuring consistent aperture jitter and maintaining 72.4dB SNR at full 105Msps without external clock conditioning circuitry.

Can the LTC2284CUP#PBF drive standard LVCMOS logic levels?

Yes - the LTC2284CUP#PBF digital outputs are LVCMOS-compatible with configurable OVDD supply (0.5V to 3.6V). At OVDD = 3V, VOH ≥2.7V and VOL ≤0.4V under 1.6mA load, meeting standard 3.3V LVCMOS thresholds; at OVDD = 1.8V, it interfaces directly with 1.8V FPGA I/O banks.

What is the purpose of the exposed pad (Pin 65) on the LTC2284CUP#PBF QFN package?

The exposed pad (Pin 65) on the LTC2284CUP#PBF is electrically connected to GND and serves as the primary thermal and electrical ground path. It must be soldered to a PCB copper pour tied to system ground to achieve θ_JA = 20°C/W and ensure stable operation at 540mW dissipation.