Analog Devices Inc. LTC2142CUP-12#PBF

Overview

LTC2142CUP-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 65Msps dual-channel simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range RF/IF digitization. It delivers 70.8dB SNR, 89dB SFDR, and ultralow 0.08psRMS jitter at full speed, operating from a single 1.8V supply with CMOS, DDR CMOS, or DDR LVDS outputs - deployed in cellular base stations and software-defined radios.

For engineers reviewing the LTC2142CUP-12#PBF datasheet, LTC2142CUP-12#PBF pinout, LTC2142CUP-12#PBF application, or LTC2142CUP-12#PBF equivalent, key selection criteria include simultaneous sampling integrity, 750MHz full-power bandwidth, low-power operation (92mW total), selectable 1VP-P to 2VP-P input range, and SPI-configurable clock duty cycle stabilization.

Technical Context

The LTC2142CUP-12#PBF integrates two matched 12-bit ADC cores sharing a common sample-and-hold with 750MHz bandwidth and 0.08psRMS aperture jitter, enabling undersampling of IF signals up to 140MHz while maintaining 70.8dB SNR. Its dual-channel architecture supports true simultaneous sampling with ±0.2% gain matching and ±1.5mV offset matching across temperature.

Digital interface flexibility includes full-rate CMOS, double-data-rate CMOS, or DDR LVDS outputs - with separate OVDD supply (1.2V–1.8V for CMOS; 1.7V–1.9V for LVDS) and programmable output randomizer. Configuration is handled via a 4-wire SPI port supporting readback, with dedicated pins for serial/parallel mode selection (PAR/SER), shutdown, and nap modes.

Key Specifications

Pinout & Package

64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND). Requires soldering 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, 12-bit ADC applications.

Compared with AD9233BCPZ-65 and LTC2262CUH-12#PBF, the LTC2142CUP-12#PBF uniquely combines true simultaneous sampling, on-chip clock duty cycle stabilization, and sub-100mW power at 65Msps - making it optimal for compact, self-contained RF digitizers where channel coherence and power efficiency are jointly critical.

Availability

LTC2142CUP-12#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging requiring stable component supply across design-in, prototyping, and production phases.

Supply support for LTC2142CUP-12#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) designs high-performance analog, mixed-signal, and RF ICs for precision instrumentation, communications, and industrial applications.

The LTC2142CUP-12#PBF belongs to the LTC214x family of dual-channel, low-power, high-speed ADCs engineered for undersampling-capable RF receiver front-ends in wireless infrastructure and portable test equipment.

FAQ

What is the maximum analog input frequency supported by the LTC2142CUP-12#PBF?

The LTC2142CUP-12#PBF features a 750MHz full-power bandwidth, enabling accurate digitization of analog inputs up to that frequency. While the Nyquist limit at 65Msps is 32.5MHz, the high bandwidth supports undersampling of IF signals - for example, a 70MHz input tone can be captured with 70.8dB SNR and 89dB SFDR, as verified in the datasheet's typical performance plots.

Does the LTC2142CUP-12#PBF support true simultaneous sampling across both channels?

Yes, the LTC2142CUP-12#PBF uses a shared sample-and-hold architecture with matched front-end paths to ensure true simultaneous sampling. This is confirmed by ±0.2% gain matching and ±1.5mV offset matching specifications across temperature, and is essential for coherent I/Q signal processing in applications like software-defined radios and phased-array ultrasound.

What digital output formats does the LTC2142CUP-12#PBF support?

The LTC2142CUP-12#PBF supports three configurable digital output formats: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Output voltage swing for CMOS is set by OVDD (1.2V–1.8V), while DDR LVDS uses internal 100Ω termination and operates with 1.7V–1.9V OVDD. Mode selection is controlled via the PAR/SER pin and SPI register settings.

How does the clock duty cycle stabilizer function in the LTC2142CUP-12#PBF?

The LTC2142CUP-12#PBF's optional clock duty cycle stabilizer corrects asymmetric encode clock waveforms internally, allowing full AC performance (70.8dB SNR, 89dB SFDR) even with duty cycles ranging from 30% to 70%. It is enabled via the CS pin in parallel programming mode and eliminates the need for external clock conditioning circuitry in noisy system environments.

What is the power consumption of the LTC2142CUP-12#PBF in active and low-power modes?

In active operation at 65Msps with CMOS outputs, the LTC2142CUP-12#PBF consumes 92mW total (46mW per channel). In nap mode, power drops to 10mW; in sleep mode, it falls to 1mW. These values are specified in the Power Requirements table and validated across temperature - enabling energy-efficient operation in battery-powered portable medical and test equipment.