Analog Devices Inc. LTC2273CUJ#TRPBF

Overview

LTC2273CUJ#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 80Msps high-speed analog-to-digital converter with JESD204 serial output interface, optimized for wideband RF sampling in communications infrastructure. It features 700MHz full-power input bandwidth, 77.7dBFS noise floor, 100dB spurious-free dynamic range (SFDR), and ultra-low 80fs RMS aperture jitter-enabling undersampling of cellular and microwave band signals in base station receivers and spectrum analyzers.

For engineers reviewing the LTC2273CUJ#TRPBF datasheet, LTC2273CUJ#TRPBF pinout, LTC2273CUJ#TRPBF application, or LTC2273CUJ#TRPBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in telecom and test equipment, and two confirmed alternative parts with documented functional trade-offs.

Technical Context

The LTC2273CUJ#TRPBF implements a 16-bit pipelined ADC core with integrated sample-and-hold, programmable gain amplifier (PGA), and 8B/10B serializer compliant with JEDEC JESD204. Its differential analog input supports 1.5VP-P or 2.25VP-P ranges, and the internal clock duty cycle stabilizer ensures consistent performance across 40%–60% input clock duty cycles.

It uses a single 3.3V analog supply (VDD) and separate 1.2V–3.3V output supply (OVDD) for CML serial outputs, with configurable synchronization via SYNC+/SYNC– and frame alignment monitoring via FAM. Latency is fixed at 9 pipeline cycles and 3 cycles from SYNC active to comma detection.

Key Specifications

Pinout & Package

40-lead 6mm × 6mm plastic QFN package (UJ) with exposed thermal pad (Pin 41 = GND). Requires soldering of exposed pad to PCB ground plane 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 AD9268BCPZ-80 and LTC2263IUP#PBF, the LTC2273CUJ#TRPBF delivers superior SFDR and integrated signal conditioning-making it preferred for demanding wireless infrastructure and test equipment where spurious suppression and analog front-end integration reduce BOM count and layout risk.

Availability

LTC2273CUJ#TRPBF is available at Aetrix Electronics and suitable for cellular base station receivers, spectrum analyzers, automated test equipment, and radar digitizers requiring stable component supply across extended production lifecycles.

Supply support for LTC2273CUJ#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 acquired Linear Technology in 2017 and maintains its high-performance signal chain portfolio, emphasizing precision, speed, and integration for demanding analog applications.

The LTC2273CUJ#TRPBF belongs to Linear's high-speed ADC family designed specifically for RF-sampling architectures in telecommunications infrastructure, defense electronics, and high-end instrumentation-where wide bandwidth, low jitter, and JESD204 interoperability are mandatory.

FAQ

What is the maximum analog input frequency supported by the LTC2273CUJ#TRPBF?

The LTC2273CUJ#TRPBF supports a full-power analog input bandwidth of 700MHz, enabling direct RF sampling of signals up to this frequency. At 140MHz input, it achieves 74.5dBFS SNR and 90dBc SFDR (with PGA = 1), confirming usable performance well into L- and S-bands. Performance degrades gradually beyond 700MHz due to S/H roll-off.

Does the LTC2273CUJ#TRPBF require an external reference voltage?

No, the LTC2273CUJ#TRPBF integrates a precision internal reference generator and does not require an external reference. The internal 1.25V reference is used for ADC core operation and provides ±30ppm/°C full-scale drift over temperature, eliminating external component cost and layout area.

How is JESD204 lane synchronization achieved on the LTC2273CUJ#TRPBF?

The LTC2273CUJ#TRPBF uses dedicated SYNC+ and SYNC– pins to initiate deterministic frame alignment. A low pulse on SYNC+ (≥2 sample clocks) triggers transmission of K28.5 comma symbols, enabling receiver FPGA to lock to the data stream with fixed 3-cycle latency from SYNC active to first comma. ISMODE pin allows idle synchronization for continuous streaming.

What power supplies are required for the LTC2273CUJ#TRPBF?

The LTC2273CUJ#TRPBF requires two independent supplies: a 3.3V analog supply (VDD, Pins 1/2/12/13) and a 1.2V–3.3V output supply (OVDD, Pins 22/25) for the CML serial drivers. VDD must be bypassed with 0.1μF ceramic capacitors per pin; OVDD requires identical decoupling and must be ≥1.4V for differential termination.

Can the LTC2273CUJ#TRPBF operate at sample rates below 80Msps?

Yes, the LTC2273CUJ#TRPBF supports sample rates from 20Msps to 80Msps. SRR0 and SRR1 pins configure the operating range, and the internal clock duty cycle stabilizer maintains performance across wide duty cycles-even at reduced rates. Power scales linearly: 1100mW at 80Msps, ~400mW at 20Msps (per IVDD curves).