Analog Devices Inc. LTC2142CUP-14#PBF

Overview

LTC2142CUP-14#PBF from Analog Devices (acquired Linear Technology) is a 14-bit, 65Msps dual-channel simultaneous-sampling ADC with 73.2dB SNR, 90dB SFDR, and 750MHz full-power bandwidth, operating from a single 1.8V supply and supporting CMOS/DDR CMOS/DDR LVDS outputs for high-fidelity IF digitization in cellular base stations.

For engineers reviewing the LTC2142CUP-14#PBF datasheet, LTC2142CUP-14#PBF pinout, LTC2142CUP-14#PBF application, or LTC2142CUP-14#PBF equivalent, key selection criteria include simultaneous sampling integrity, ultralow 0.08psRMS jitter for undersampling, configurable 1–2VP-P input range, and SPI-configurable power modes (Nap/Sleep) for dynamic system-level power management.

Technical Context

This ADC employs a two-channel interleaved sample-and-hold architecture with independent analog front-ends, enabling true simultaneous sampling critical for phase-coherent I/Q demodulation and multi-channel data acquisition. Its internal reference supports ±1V or ±0.5V input ranges via SENSE pin configuration, and the ENC+/ENC– differential clock interface accepts PECL/LVDS/TTL/CMOS inputs with optional duty cycle stabilization.

Digital output flexibility includes full-rate CMOS (1.2–1.8V swing), DDR CMOS, or DDR LVDS (1.75mA/3.5mA modes), each with separate OVDD supply and on-chip 100Ω LVDS termination. The SPI port enables real-time configuration of output format, randomizer, and power modes without external logic.

Key Specifications

Pinout & Package

64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND, must be soldered). Pin functions are validated per Linear Technology datasheet 21421014fa, including dual analog input pairs (AIN1±, AIN2±), independent VCM1/VCM2 bias outputs, and dedicated digital I/O banks (ENC+, ENC–, CS, SCK, SDI, SDO, D1_[0–13], D2_[0–13]).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9257BCPZ-65 and ADS52J90IRGCT, the LTC2142CUP-14#PBF offers superior simultaneous sampling fidelity and simpler parallel interface implementation, making it optimal for phase-critical dual-channel applications where deterministic latency and minimal FPGA resource usage are prioritized.

Availability

LTC2142CUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging requiring stable component supply and long-term production continuity.

Supply support for LTC2142CUP-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving communications, industrial, automotive, and healthcare markets.

The LTC2142CUP-14#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, low jitter, and flexible digital interfacing.

FAQ

What is the maximum sampling rate supported by the LTC2142CUP-14#PBF?

The LTC2142CUP-14#PBF supports a maximum sampling rate of 65Msps per channel, delivering true simultaneous sampling across both channels. This rate is specified under recommended operating conditions (VDD = 1.8V, differential encode input, 2VP-P input range) and is validated across the 0°C to 70°C commercial temperature range for the C-grade variant.

Does the LTC2142CUP-14#PBF support external reference voltage?

Yes, the LTC2142CUP-14#PBF supports external reference voltage applied to the SENSE pin within 0.625V to 1.300V. When an external reference is used, the device operates with that reference instead of the internal 1.25V reference, enabling custom input range scaling and improved system-level accuracy through a precision external source.

How does the LTC2142CUP-14#PBF achieve simultaneous sampling between its two channels?

The LTC2142CUP-14#PBF achieves simultaneous sampling using matched, independent sample-and-hold circuits for each channel, driven by a common encode clock edge. Inter-channel skew is minimized to <1ps through monolithic layout matching and shared clock distribution, ensuring phase coherence required for I/Q demodulation and beamforming without post-processing calibration.

What digital output formats does the LTC2142CUP-14#PBF support?

The LTC2142CUP-14#PBF supports three digital output formats: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Output format is selected via SPI register configuration or parallel control pins (SCK in PAR/SER = VDD mode), with separate OVDD supply allowing CMOS swing adjustment (1.2–1.8V) or LVDS current-mode selection (1.75mA or 3.5mA).

What power-saving features are available on the LTC2142CUP-14#PBF?

The LTC2142CUP-14#PBF provides Nap mode (10mW) and Sleep mode (1mW) accessible via SPI command or parallel control (SDI/SDO combination). These modes retain register settings and reference bias while disabling analog core and output drivers, enabling rapid wake-up (<1μs) for burst-mode or time-division duplex (TDD) applications without recalibration.