Analog Devices Inc. LTC2150IUJ-12#PBF

Overview

LTC2150IUJ-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 170Msps high-speed analog-to-digital converter optimized for undersampling wideband RF signals 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 and supporting low-power Nap/Sleep modes. It is used in cellular basestations and software-defined radios requiring high dynamic range at IF frequencies up to 900MHz.

For engineers reviewing the LTC2150IUJ-12#PBF datasheet, LTC2150IUJ-12#PBF pinout, LTC2150IUJ-12#PBF application, or LTC2150IUJ-12#PBF equivalent, key selection criteria include its guaranteed –40°C to +85°C industrial temperature grade, 40-lead 6mm × 6mm QFN package with exposed thermal pad, differential analog input interface, and SPI-configurable LVDS output current (1.75mA/3.5mA).

Technical Context

The LTC2150IUJ-12#PBF implements 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 100Ω on-chip termination and optional clock duty cycle stabilizer for robust timing across varied input clock waveforms.

It supports both internal and external reference configurations via the SENSE pin, enabling ±0.75V (internal) or ±0.6×V_SENSE (external 1.2–1.3V) input ranges. The SPI port configures operating modes including Nap/Sleep power states, LVDS current level, and CLKOUT phase delay - all without requiring external logic.

Key Specifications

Pinout & Package

Package: 40-lead (6mm × 6mm) plastic QFN with exposed thermal pad (Pin 41 = GND), RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2150IUJ-12#PBF, AD9230-170EBZ trades LVDS simplicity for JESD204B scalability but increases power and FPGA complexity, whereas LTC2151IUJ-12#PBF offers a direct speed upgrade within the same footprint and feature set - ideal for performance-scaling without redesign.

Availability

LTC2150IUJ-12#PBF is available at Aetrix Electronics and suitable for cellular basestation receiver modules, software-defined radio platforms, high-definition video test equipment, and portable instrumentation requiring stable component supply across extended temperature ranges.

Supply support for LTC2150IUJ-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 DSP technologies, serving precision instrumentation, communications, and industrial markets.

The LTC2150IUJ-12#PBF belongs to the LTC215x-12 family of ultra-low-jitter, high-SFDR ADCs designed specifically for demanding RF sampling applications in wireless infrastructure and test equipment.

FAQ

What is the maximum sampling rate supported by the LTC2150IUJ-12#PBF?

The LTC2150IUJ-12#PBF supports a maximum sampling rate of 170Msps, as specified in its part number suffix and confirmed in the Absolute Maximum Ratings and Dynamic Accuracy sections of the datasheet. This rate is fully characterized across the –40°C to +85°C industrial temperature range with guaranteed SNR and SFDR performance.

Does the LTC2150IUJ-12#PBF require an external reference voltage?

No, the LTC2150IUJ-12#PBF includes an internal 1.25V reference with ±30ppm/°C drift and can operate in internal reference mode by connecting the SENSE pin to VDD. An external 1.2–1.3V reference may be applied to SENSE only if a custom input range (±0.6×V_SENSE) is required - the LTC2150IUJ-12#PBF does not require external reference circuitry for standard operation.

How is the LVDS output current configured on the LTC2150IUJ-12#PBF?

The LVDS output current on the LTC2150IUJ-12#PBF is configured via the SPI interface using the MODE CONTROL REGISTER (address 0x00). Bit [1:0] selects between 1.75mA (default) and 3.5mA output drive strength. In parallel programming mode (PAR/SER = VDD), SDI pin state also controls this setting - eliminating need for SPI transaction in fixed-configuration systems.

What is the purpose of the PAR/SER pin on the LTC2150IUJ-12#PBF?

The PAR/SER pin on the LTC2150IUJ-12#PBF selects between serial SPI programming mode (PAR/SER = GND) and parallel logic control mode (PAR/SER = VDD). In serial mode, CS, SCK, SDI, and SDO form a full-featured 3-wire SPI interface for configuring all device settings. In parallel mode, those pins become simple logic inputs controlling sleep, duty cycle stabilizer, and LVDS current - reducing MCU overhead in simpler systems.

Can the LTC2150IUJ-12#PBF be used in systems requiring operation below –40°C?

No, the LTC2150IUJ-12#PBF is rated for operation from –40°C to +85°C (industrial grade). It is not characterized or guaranteed for extended temperature operation below –40°C. For sub–40°C applications, users must consult Analog Devices' product change notifications or evaluate alternative parts such as the LTC2152CUJ-12#PBF (0°C to +70°C) with derating analysis - the LTC2150IUJ-12#PBF itself does not support cryogenic or automotive-grade temperature ranges.