Analog Devices Inc. LTC2263CUJ-14#PBF

Overview

LTC2263CUJ-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for low-power, high-dynamic-range signal digitization at 25Msps. It delivers 73.4dB SNR and 90dB SFDR at 70MHz input, features ultralow 0.15psRMS jitter, ±1LSB INL (typ), and operates from a single 1.8V supply. It serves as the front-end ADC in portable medical imaging and multichannel data acquisition systems requiring precise undersampling of IF signals.

For engineers reviewing the LTC2263CUJ-14#PBF datasheet, LTC2263CUJ-14#PBF pinout, LTC2263CUJ-14#PBF application, or LTC2263CUJ-14#PBF equivalent, this page provides verified specifications, QFN-40 package layout, LVDS serialization modes, internal reference configuration, and validated alternative parts for design-in and BOM optimization.

Technical Context

The LTC2263CUJ-14#PBF integrates two independent 14-bit ADC cores with shared sample-and-hold (800MHz full-power bandwidth) and a PLL-based clocking subsystem. Its differential analog inputs support 1VP-P to 2VP-P selectable ranges via the SENSE pin, and its serial LVDS outputs operate in either 1-lane (14-bit) or 2-lane (7-bit per lane) mode with programmable 1.75mA/3.5mA drive strength.

It supports SPI configuration (via CS/SCK/SDI/SDO) and parallel mode programming (via PAR/SER), includes shutdown and nap modes (1mW/60mW), and features an internal clock duty cycle stabilizer enabling robust operation across wide input duty cycles - critical for RF sampling applications where clock sources exhibit asymmetry.

Key Specifications

Pinout & Package

Package: 40-lead (6mm × 6mm) plastic QFN (UJ), exposed pad (Pin 41) soldered to PCB ground for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 14-bit ADC applications.

Compared with LTC2263CUJ-14#PBF, LTC2264CUJ-14#PBF offers higher throughput without layout change, while AD9257BCPZ-25 trades LVDS simplicity for JESD204B scalability - making LTC2263CUJ-14#PBF optimal for cost-sensitive, thermally constrained, or legacy-FPGA designs needing plug-and-play analog interface.

Availability

LTC2263CUJ-14#PBF is available at Aetrix Electronics and suitable for portable medical imaging, multichannel data acquisition, nondestructive testing, and compact SDR receivers requiring stable component supply across production lifecycles.

Supply support for LTC2263CUJ-14#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 solutions, serving communications, industrial, automotive, and healthcare markets.

The LTC2263CUJ-14#PBF belongs to the LTC226x-14 family of low-power, dual-channel, high-SFDR ADCs designed specifically for portable instrumentation, radar front-ends, and communications infrastructure where dynamic range, jitter, and power efficiency are critical.

FAQ

What is the maximum sampling frequency supported by the LTC2263CUJ-14#PBF?

The LTC2263CUJ-14#PBF is rated for a maximum sampling frequency of 25Msps, as confirmed in the "Timing Characteristics" table of the official datasheet. This speed grade is fixed per part number - unlike the pin-compatible LTC2264-14 (40Msps) or LTC2265-14 (65Msps), the LTC2263CUJ-14#PBF's internal architecture and timing margins are optimized specifically for 25Msps operation with guaranteed AC performance including 73.4dB SNR at 70MHz input.

Does the LTC2263CUJ-14#PBF require an external reference voltage?

No, the LTC2263CUJ-14#PBF includes a precision internal 1.25V reference (VREF pin) and supports fully self-contained operation. The SENSE pin configures input range: tied to VDD yields ±1V, to GND yields ±0.5V, or an external 0.625–1.3V applied to SENSE sets ±0.8×VSENSE. External references are optional and only needed if tighter initial accuracy or temperature drift specs than the internal reference provides are required.

How does the LVDS serialization mode affect data interface timing for the LTC2263CUJ-14#PBF?

The LTC2263CUJ-14#PBF supports two LVDS serialization modes selected via the PAR/SER pin and CS logic: 1-lane mode outputs all 14 bits sequentially on OUT1A+/– and OUT2A+/– (tSER = 1/(14·fS)), while 2-lane mode splits each 14-bit word into two 7-bit nibbles across OUT1A+/– + OUT1B+/– (and similarly for Channel 2), halving the serial bit rate (tSER = 1/(7·fS)). Frame (FR) and data clock (DCO) timing scales accordingly - critical for FPGA capture logic setup/hold validation.

What is the function of the exposed pad (Pin 41) on the LTC2263CUJ-14#PBF QFN package?

The exposed pad (Pin 41) on the LTC2263CUJ-14#PBF is electrically and thermally connected to GND. Per the Absolute Maximum Ratings and Pin Configuration diagrams, it must be soldered directly to the PCB ground plane using multiple thermal vias. This connection is mandatory for achieving specified thermal resistance (θJA = 32°C/W), minimizing junction temperature rise, and maintaining analog performance stability - floating or unconnected pads cause thermal runaway and increased noise.

Can the LTC2263CUJ-14#PBF operate with a single-ended encode clock input?

Yes, the LTC2263CUJ-14#PBF supports single-ended encode clock operation: tie ENC– to GND and drive ENC+ with a 0.2–3.6V logic signal (e.g., 1.8V square wave). In this mode, conversion triggers on the ENC+ rising edge only. The datasheet specifies VIH = 1.2V and VIL = 0.6V under VDD = 1.8V conditions, and input capacitance is 3.5pF - allowing direct interfacing with standard FPGA or microcontroller GPIOs without level-shifting.