Analog Devices Inc. LTC2152CUJ-12#PBF

Overview

LTC2152CUJ-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 250Msps pipelined analog-to-digital converter optimized for high-frequency undersampling in communications infrastructure. It delivers 68.5dB SNR, 90dB SFDR, and 1.25GHz full-power bandwidth with DDR LVDS outputs, operating from a single 1.8V supply. Its primary role is digitizing wideband RF/IF signals in cellular basestations and software-defined radios.

For engineers reviewing the LTC2152CUJ-12#PBF datasheet, LTC2152CUJ-12#PBF pinout, LTC2152CUJ-12#PBF application, or LTC2152CUJ-12#PBF equivalent, key selection criteria include sampling rate tolerance, input common-mode compatibility, LVDS output current programmability, and SPI-configurable sleep/napping modes for power-sensitive systems.

Technical Context

The LTC2152CUJ-12#PBF employs a 12-bit pipelined ADC architecture with integrated sample-and-hold (S/H) featuring 1.25GHz full-power bandwidth and 0.15psRMS acquisition jitter. Its digital interface uses double-data-rate (DDR) LVDS outputs with programmable 1.75mA or 3.5mA drive strength and optional on-chip 100Ω termination per pair.

It supports differential analog input with user-selectable ±0.75V (internal reference) or ±0.6×V_SENSE (external reference) range, biased by the VCM output (0.439×V_DD). Clocking accepts differential ENC+/ENC– inputs with optional duty-cycle stabilization, and configuration is performed via a 3-wire SPI port controlling nap/sleep modes, output current, and clock phase delay.

Key Specifications

Pinout & Package

40-lead (6mm × 6mm) plastic QFN package with exposed pad (Pin 41), requiring soldering to PCB ground for thermal and electrical integrity. Pin 1 is top-left corner adjacent to notch/dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with AD9230-250EBZ and LTC2262CUH-12#PBF, the LTC2152CUJ-12#PBF uniquely combines 250Msps speed, DDR LVDS simplicity, and single 1.8V operation-making it optimal for space-constrained, thermally sensitive RF receivers needing plug-and-play timing alignment without serializer complexity.

Availability

LTC2152CUJ-12#PBF is available at Aetrix Electronics and suitable for cellular basestation receiver design, software-defined radio development, and high-definition video acquisition requiring stable component supply and long-term production continuity.

Supply support for LTC2152CUJ-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) is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and industrial markets.

The LTC2152 family was designed specifically for wideband, high-dynamic-range digitization in wireless infrastructure and test equipment-emphasizing low jitter, high SFDR, and simplified power and interface architecture.

FAQ

What is the maximum sampling rate supported by the LTC2152CUJ-12#PBF?

The LTC2152CUJ-12#PBF supports a maximum sampling rate of 250Msps, as specified in its part number suffix and confirmed in the Absolute Maximum Ratings and Dynamic Accuracy sections of the datasheet. This rate is achievable across the full 0°C to 70°C operating temperature range with proper power supply decoupling and thermal management.

Does the LTC2152CUJ-12#PBF require an external reference voltage?

No-the LTC2152CUJ-12#PBF includes an internal 1.25V reference (VREF) and supports both internal and external reference configurations. When SENSE is tied to VDD, the device uses the internal reference and provides a ±0.75V differential input range. An external 1.2–1.3V reference applied to SENSE selects a ±0.6×V_SENSE range, giving designers flexibility without mandatory external components.

How does the DDR LVDS output interface of the LTC2152CUJ-12#PBF function?

The LTC2152CUJ-12#PBF uses double-data-rate LVDS outputs where each differential pair (e.g., D0_1+, D0_1–) carries two time-multiplexed bits: even bits (D0, D2, etc.) appear when CLKOUT+ is low, and odd bits (D1, D3, etc.) appear when CLKOUT+ is high. The output current is programmable to 1.75mA or 3.5mA, and on-chip 100Ω termination is optional per pair-reducing external component count and layout complexity.

Can the LTC2152CUJ-12#PBF operate with non-50% duty-cycle clock inputs?

Yes-the LTC2152CUJ-12#PBF includes an optional clock duty cycle stabilizer enabled via SPI configuration. When activated, this circuit corrects duty cycle deviations in the ENC+/ENC– input, allowing reliable operation with clocks from PLLs or dividers that do not deliver exact 50% duty cycle-preserving setup/hold margins and minimizing aperture jitter at 250Msps.

What power-saving modes are available on the LTC2152CUJ-12#PBF?

The LTC2152CUJ-12#PBF offers two low-power states: Nap mode consumes 105mW at full 250Msps clock rate, and Sleep mode draws less than 2mW. Both are controlled via the SPI interface and retain register settings, enabling rapid wake-up without reconfiguration-ideal for burst-mode receivers or portable test equipment requiring extended battery life.