Analog Devices Inc. LTC2142IUP-14#TRPBF

Overview

LTC2142IUP-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, dual-channel simultaneous-sampling analog-to-digital converter with 65Msps sampling rate, 73.2dB SNR, and 90dB SFDR. It operates from a single 1.8V supply, supports CMOS/DDR-CMOS/DDR-LVDS outputs, and targets high-performance communications systems including cellular base stations and software-defined radios.

For engineers reviewing the LTC2142IUP-14#TRPBF datasheet, LTC2142IUP-14#TRPBF pinout, LTC2142IUP-14#TRPBF application, or LTC2142IUP-14#TRPBF equivalent, key selection criteria include its 750MHz full-power bandwidth, ultralow 0.08psRMS jitter for IF undersampling, ±1LSB INL, and support for differential or single-ended clock inputs with optional duty cycle stabilization.

Technical Context

The LTC2142IUP-14#TRPBF implements two independent 14-bit ADC cores with synchronized sample-and-hold circuits, enabling true simultaneous sampling across channels. Its architecture includes an internal 1.25V reference, programmable input range (1VP-P to 2VP-P), and selectable output formats - full-rate CMOS, DDR-CMOS, or DDR-LVDS - with separate OVDD supply for output voltage scaling.

It features a serial SPI interface for configuration of modes including shutdown, nap, data randomization, and clock duty cycle stabilization. The ENC+/ENC– encode inputs accept differential (LVDS/PECL) or single-ended (TTL/CMOS) signals, and the device achieves <1.2LSB_RMS transition noise with no missing codes over temperature.

Key Specifications

Pinout & Package

Package: 64-lead (9mm × 9mm) plastic QFN with exposed thermal pad (Pin 65 = GND, must be soldered to PCB). Thermal resistance θ_JA = 20°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9250BCPZ-65 and LTC2262IUP-14#TRPBF, the LTC2142IUP-14#TRPBF uniquely delivers dual-channel simultaneity in a parallel-output, ultra-low-jitter, sub-100mW package-making it irreplaceable for phase-coherent I/Q systems without JESD204B support or where second channel is mandatory.

Availability

LTC2142IUP-14#TRPBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging requiring stable component supply across extended temperature ranges.

Supply support for LTC2142IUP-14#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.

The LTC2142IUP-14#TRPBF belongs to the LTC214x family of ultra-low-power, high-SFDR dual ADCs designed specifically for demanding communications and instrumentation applications where simultaneity, jitter performance, and power efficiency are critical.

FAQ

What is the operating temperature range for the LTC2142IUP-14#TRPBF?

The LTC2142IUP-14#TRPBF is rated for industrial operation from –40°C to +85°C, as indicated by the "I" grade in the part number. This range is validated across all specified AC and DC performance parameters, including SNR, SFDR, INL, and power consumption, ensuring reliability in base station outdoor units and portable medical devices.

Does the LTC2142IUP-14#TRPBF support external reference voltage?

Yes, the LTC2142IUP-14#TRPBF supports external reference via the SENSE pin (Pin 63). Applying 0.625V–1.3V to SENSE enables external reference mode, allowing precise control of input range and improved system-level accuracy when paired with a low-drift external reference IC. Internal reference remains active unless SENSE is externally driven.

How does the clock duty cycle stabilizer function in the LTC2142IUP-14#TRPBF?

The clock duty cycle stabilizer in the LTC2142IUP-14#TRPBF is enabled via SPI register control and corrects asymmetric encode clocks (e.g., 30/70% duty cycle) to near 50/50 before sampling. This maintains optimal aperture window timing and prevents SNR degradation - especially critical at 65Msps where even minor duty cycle errors increase jitter-induced noise.

Can the LTC2142IUP-14#TRPBF operate with a 1.2V OVDD supply?

Yes, the LTC2142IUP-14#TRPBF supports OVDD from 1.1V to 1.9V. At 1.2V OVDD, CMOS outputs deliver VOH ≥1.185V and VOL ≤0.010V under 500μA load, enabling direct interfacing with 1.2V FPGA I/O banks while reducing switching power by ~40% versus 1.8V operation - a key advantage in thermally constrained designs.

What is the pipeline latency of the LTC2142IUP-14#TRPBF in DDR CMOS mode?

In DDR CMOS output mode, the LTC2142IUP-14#TRPBF has a fixed pipeline latency of 6.5 clock cycles from ENC edge to valid data output. This deterministic latency simplifies timing closure in FPGA-based receivers and enables precise synchronization between ADC samples and DSP processing stages without dynamic calibration.