Analog Devices Inc. LTC2228CUH#TRPBF

Overview

LTC2228CUH#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 65Msps low-power 3V analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in imaging and communications systems. It delivers 71.3dB SNR and 90dB SFDR at Nyquist, features ±0.3LSB typical INL, 575MHz full-power bandwidth, and operates from a single 2.7V–3.4V supply consuming 205mW.

For engineers reviewing the LTC2228CUH#TRPBF datasheet, LTC2228CUH#TRPBF pinout, LTC2228CUH#TRPBF application, or LTC2228CUH#TRPBF equivalent, key selection criteria include its 65Msps sampling rate, differential input support with flexible 1VP-P to 2VP-P range, clock duty cycle stabilizer, shutdown/nap modes, and QFN-32 package compatibility with space-constrained RF front-ends and portable instrumentation.

Technical Context

The LTC2228CUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and aperture jitter of 0.2psRMS. Its sample-and-hold circuit supports both differential and single-ended analog inputs, with common-mode bias provided by an internal 1.5V VCM output.

It integrates a flexible reference system-supporting internal ±0.5V/±1V ranges via SENSE pin programming or external reference inputs-and includes dedicated REFH/REFL pins with dual-capacitor bypassing requirements. The clock input is single-ended, and optional duty cycle stabilization maintains AC performance across 30%–70% duty cycles.

Key Specifications

Pinout & Package

Package: 32-lead (5mm × 5mm) plastic QFN (UH package) with exposed pad (Pin 33) soldered to PCB ground for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9226BCPZ-65 and LTC2248IUH#TRPBF, the LTC2228CUH#TRPBF offers optimal balance of 12-bit precision, 65Msps speed, and integrated analog features-including programmable input range, on-chip VCM, and duty cycle stabilization-in a thermally efficient 5mm × 5mm QFN, making it ideal for size- and power-constrained RF and medical platforms.

Availability

LTC2228CUH#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical ultrasound, portable instrumentation, and high-speed data acquisition requiring stable component supply and long-term production continuity.

Supply support for LTC2228CUH#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2228CUH#TRPBF belongs to ADI's high-speed precision ADC product line, designed specifically for applications demanding wide dynamic range, low power, and robust AC performance in compact form factors.

FAQ

What is the maximum recommended clock duty cycle range for optimal performance of the LTC2228CUH#TRPBF?

The LTC2228CUH#TRPBF achieves full specified AC performance (71.3dB SNR, 90dB SFDR) across a 30%–70% clock duty cycle when the MODE pin is biased to 1/3 VDD to enable the internal duty cycle stabilizer. Without stabilizer activation (MODE = GND or VDD), performance degrades outside 45%–55%, requiring external clock conditioning for non-50% sources.

How does the SENSE pin configure input range on the LTC2228CUH#TRPBF?

The SENSE pin directly programs the LTC2228CUH#TRPBF's full-scale differential input range: connecting to VCM selects ±0.5V, to VDD selects ±1V, and to an external voltage between 0.5V–1V selects ±V_SENSE. This eliminates external resistive dividers or programmable gain amplifiers in multi-range sensor interfaces.

Can the LTC2228CUH#TRPBF operate with a 1.8V OVDD supply while maintaining full-speed performance?

Yes - the LTC2228CUH#TRPBF supports OVDD from 0.5V to 3.6V. At OVDD = 1.8V, it delivers full 65Msps operation with VOH ≥ 1.79V and VOL ≤ 0.09V under 1.6mA load, enabling direct interfacing to 1.8V FPGAs or ASICs without level shifters.

What is the purpose of the OF (Over/Under Flow) pin on the LTC2228CUH#TRPBF?

The OF pin on the LTC2228CUH#TRPBF asserts high for one clock cycle whenever the analog input exceeds the selected full-scale range (±V_SENSE), indicating saturation. This flag enables real-time automatic gain control (AGC) in receivers or clipping detection in test equipment without host processor intervention.

Does the LTC2228CUH#TRPBF require external reference components for basic operation?

No - the LTC2228CUH#TRPBF includes an internal reference and requires only external bypass capacitors on REFH/REFL (0.1μF + 2.2μF ceramic) for stable operation. External references are optional and used only when higher accuracy or temperature stability than the internal ±0.5% reference is needed.