Analog Devices Inc. LTC2287IUP#PBF

Overview

LTC2287IUP#PBF from Analog Devices (formerly Linear Technology) is a dual 10-bit, 40Msps low-noise analog-to-digital converter operating from a single 3V supply (2.7V–3.4V), delivering 61.8dB SNR and 85dB SFDR at Nyquist, with 110dB channel isolation at 100MHz. It targets high-fidelity digitization in broadband communications receivers and medical ultrasound front-ends where dual-channel synchronization and wide full-power bandwidth (575MHz) are critical.

For engineers reviewing the LTC2287IUP#PBF datasheet, LTC2287IUP#PBF pinout, LTC2287IUP#PBF application, or LTC2287IUP#PBF equivalent, key selection criteria include its 40Msps sample rate, dual independent clock inputs (CLKA/CLKB), flexible ±0.5V to ±1V differential input range, multiplexed or separate 10-bit parallel digital outputs, and support for offset binary or 2's complement output format via MODE pin configuration.

Technical Context

The LTC2287IUP#PBF implements a six-stage CMOS pipelined ADC architecture per channel, achieving 5-cycle pipeline latency and sub-0.07LSB_RMS transition noise. Its on-chip clock duty cycle stabilizer enables robust operation across wide input clock duty cycles without external correction circuitry.

Each channel features independent reference programming (SENSEA/SENSEB), separate shutdown control (SHDNA/SHDNB), and configurable output drivers with OVDD support from 0.5V to 3.6V - enabling direct interfacing with FPGA I/O banks or microcontroller parallel interfaces while maintaining signal integrity under varying logic voltage requirements.

Key Specifications

Pinout & Package

64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = 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 dual-channel ADC applications.

Compared with AD9233BCPZ-65 and LTC2289IUP#PBF, the LTC2287IUP#PBF provides optimal balance of dual-channel integration, 40Msps sample rate, and 235mW power - making it ideal for space-constrained, thermally sensitive applications where synchronized dual-path digitization is required without external alignment circuitry.

Availability

LTC2287IUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, and portable test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade (–40°C to +85°C).

Supply support for LTC2287IUP#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 industrial, automotive, communications, and healthcare markets.

The LTC2287IUP#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring dual-channel synchronization, low noise, and flexible interface options.

FAQ

What is the operating temperature range for the LTC2287IUP#PBF?

The LTC2287IUP#PBF is specified for industrial operation from –40°C to +85°C, as indicated by the "I" grade in the part number. This rating is validated across all AC and DC specifications in the datasheet, including SNR, SFDR, INL, and DNL, ensuring consistent performance in harsh environmental conditions encountered in outdoor wireless infrastructure or industrial automation systems.

Does the LTC2287IUP#PBF support single-ended analog inputs?

Yes, the LTC2287IUP#PBF supports single-ended analog inputs, though differential drive is recommended for optimal harmonic distortion performance. When driven single-ended, the input common-mode voltage must be set to 0.5V–2.0V (per datasheet Note 7), and SNR/SFDR will degrade by approximately 2–3dB compared to differential operation due to reduced noise rejection and increased even-order harmonics.

How does the MODE pin configure output format and clock stabilization on the LTC2287IUP#PBF?

The MODE pin on the LTC2287IUP#PBF selects both output coding and clock duty cycle stabilizer state: GND configures offset binary with stabilizer disabled; 1/3 VDD enables offset binary with stabilizer active; 2/3 VDD selects 2's complement with stabilizer active; VDD sets 2's complement with stabilizer disabled. This dual-function control reduces pin count while maintaining flexibility for FPGA interface compatibility and clock source variability.

Can the LTC2287IUP#PBF operate with different supply voltages for analog and digital outputs?

Yes, the LTC2287IUP#PBF uses separate supplies: VDD (2.7V–3.4V) powers the analog core and clocks, while OVDD (0.5V–3.6V) independently powers the digital output drivers. This allows direct interfacing with 1.8V, 2.5V, or 3.3V logic families without level shifters - critical for mixed-voltage FPGA or ASIC designs where output voltage compliance must match downstream receiver thresholds.

What is the purpose of the SENSEA and SENSEB pins on the LTC2287IUP#PBF?

The SENSEA and SENSEB pins on the LTC2287IUP#PBF program each channel's full-scale differential input range: connecting to VCMA/VCMB selects ±0.5V; to VDD selects ±1V; or to an external reference (0.5V–1.0V) scales the range to ±V_SENSE. This eliminates external gain-setting resistors and enables dynamic range optimization per channel - essential for multi-gain ultrasound receive paths or adaptive RF front-ends.