Analog Devices Inc. LTC2144CUP-12#PBF

Overview

LTC2144CUP-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, dual-channel, simultaneous-sampling analog-to-digital converter with 105Msps sampling rate, 70.5dB SNR, 89dB SFDR, and 750MHz full-power bandwidth. It operates from a single 1.8V supply and supports CMOS, DDR CMOS, or DDR LVDS digital outputs - ideal for software-defined radios and portable medical imaging systems requiring high dynamic range at moderate sample rates.

For engineers reviewing the LTC2144CUP-12#PBF datasheet, LTC2144CUP-12#PBF pinout, LTC2144CUP-12#PBF application, or LTC2144CUP-12#PBF equivalent, key selection criteria include its 105Msps dual-channel throughput, ±0.3LSB INL, 0.08psRMS jitter, 1VP-P to 2VP-P selectable input range, and support for differential or single-ended encode inputs - all in a thermally enhanced 64-pin QFN package.

Technical Context

The LTC2144CUP-12#PBF implements two independent 12-bit ADC cores sharing a common sample-and-hold with 750MHz bandwidth and ultralow 0.08psRMS aperture jitter. Its architecture enables true simultaneous sampling across channels, critical for phase-coherent I/Q demodulation and multi-channel data acquisition.

Digital output flexibility includes full-rate CMOS, double-data-rate CMOS, or DDR LVDS modes, with separate OVDD supply (1.1V–1.8V) enabling voltage-level translation. Configuration is managed via SPI-compatible serial interface or parallel control pins, supporting clock duty cycle stabilization and optional data randomization to reduce spectral artifacts.

Key Specifications

Pinout & Package

64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND), rated for 0°C to 70°C operation. Requires low-inductance grounding of OGND (Pin 41) and local 0.1μF ceramic bypassing on VDD (Pins 1,16,17,64), OVDD (Pin 42), REFH/REFL (Pins 7,8,9,10), and VCM1/VCM2 (Pins 2,15).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 12-bit ADC applications.

Compared with AD9233BCPZ-105, the LTC2144CUP-12#PBF eliminates inter-device skew and reduces component count via integrated dual-channel architecture, while outperforming it by 5.5dB SNR. Against LTC2145CUP-12#PBF, it trades 20Msps speed for 39mW lower power - a decisive advantage in thermally constrained or battery-operated systems.

Availability

LTC2144CUP-12#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, portable medical imaging, software-defined radio, and industrial data acquisition systems requiring stable component supply, long-term manufacturability, and guaranteed lead-free compliance.

Supply support for LTC2144CUP-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving communications, industrial, automotive, and healthcare markets.

The LTC2144CUP-12#PBF belongs to ADI's high-speed, low-power dual ADC product line designed specifically for demanding communications and instrumentation applications where simultaneous sampling, low jitter, and flexible digital interfacing are critical.

FAQ

What is the maximum sampling rate supported by the LTC2144CUP-12#PBF?

The LTC2144CUP-12#PBF supports a maximum sampling rate of 105Msps across both channels simultaneously. This rate is specified under recommended operating conditions (VDD = 1.8V, sine wave input, differential encode) and is validated across the full 0°C to 70°C temperature range. Performance metrics including SNR and SFDR are guaranteed at this rate, making LTC2144CUP-12#PBF suitable for real-time signal capture in SDR and medical ultrasound applications.

Does the LTC2144CUP-12#PBF support differential analog input?

Yes, the LTC2144CUP-12#PBF fully supports differential analog input on both channels: AIN1+ and AIN1– (Pins 4 and 5) for Channel 1, and AIN2+ and AIN2– (Pins 12 and 13) for Channel 2. The device specifies ±0.3LSB INL and 70.5dB SNR under differential drive conditions with 2VP-P input range. Common-mode bias is provided internally via VCM1 and VCM2 outputs, eliminating the need for external bias networks.

What digital output interfaces does the LTC2144CUP-12#PBF support?

The LTC2144CUP-12#PBF supports three configurable digital output modes: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Output voltage levels are set by OVDD (Pin 42), which can be 1.2V, 1.5V, or 1.8V for CMOS modes, or 1.8V for LVDS. The LVDS mode includes on-chip 100Ω termination and supports both 1.75mA and 3.5mA current modes - all configured via the SPI interface or parallel control pins.

How is the LTC2144CUP-12#PBF configured for serial programming?

The LTC2144CUP-12#PBF is configured for serial programming by tying the PAR/SER pin (Pin 11) to GND. This activates the SPI-compatible interface using CS (Pin 20), SCK (Pin 21), SDI (Pin 22), and SDO (Pin 61). Commands written to internal mode registers control output format, clock stabilizer, randomizer, and power modes. SDO is open-drain and requires an external 2kΩ pull-up resistor if readback functionality is used.

What is the thermal pad connection requirement for the LTC2144CUP-12#PBF?

The exposed thermal pad (Pin 65) of the LTC2144CUP-12#PBF must be soldered directly to the PCB ground plane using multiple thermal vias. This pad is electrically connected to GND and serves as the primary thermal conduction path - critical for maintaining junction temperature below 150°C at 144mW dissipation. Failure to properly connect Pin 65 will result in excessive thermal resistance (θJA = 20°C/W specified only with proper pad soldering) and potential reliability issues.